By Jessica Irving Marschall, CPA

Marschall Accounting Services, LLC

August 11, 2026

Choosing to operate as an S corporation can be one of the most valuable tax planning decisions available to a closely held business owner. When the structure is used correctly, it can provide liability separation, pass-through taxation, meaningful payroll tax planning opportunities, and a flexible framework for a profitable operating business.

An S corporation, however, is not a set-it-and-forget-it entity. The same rules that make the election attractive also create compliance traps, including unreasonable owner payroll, improperly handled health insurance, undocumented shareholder loans, distributions in excess of basis, incorrect Schedule M-2 reporting, and asset-holding decisions that can become expensive later, particularly when real estate is involved.

This guide is written for business owners who are considering an S corporation election or who already operate as an S corporation. It explains why the structure can be beneficial for profitable operating businesses, why shareholder-employees must pay themselves reasonable compensation, how health insurance works for more-than-2% shareholders, why appreciated real estate is often better held outside the entity, how distributions, shareholder basis, the accumulated adjustments account, Schedule M-2, and shareholder loans interact, what can go wrong when book equity turns negative while owner draws continue, and what records should be maintained each year to keep the election defensible.

Professional disclaimer: This article is educational and general in nature. S corporation tax results depend heavily on the facts, the governing documents, the shareholder history, prior tax filings, entity-level debt, shareholder loans, payroll practices, state law, and each shareholder’s individual tax position. Business owners should consult their tax advisor before forming an entity, making an election, converting, distributing assets, reclassifying draws, or amending returns.

1. What Is an S Corporation?

An S corporation is not a separate legal entity type under state law. It is a federal tax classification elected by an eligible corporation, or in many cases by an eligible limited liability company that first elects to be taxed as a corporation and then elects S status. The result combines a corporate legal structure under state law with pass-through federal income taxation, along with employee payroll treatment for owners who work in the business.

Under Section 1366 of the Internal Revenue Code, shareholders take into account their pro rata share of the corporation’s separately stated and nonseparately computed items of income, loss, deduction, and credit, and the character of those items generally passes through as if the shareholder had realized each item directly from the same source. That pass-through treatment is one of the core benefits of the election, and it is also the reason shareholder-level records, especially basis records, matter so much.

2. Why Business Owners Choose S Corporation Status

S corporation status can be a strong fit for a profitable service business, consulting firm, trade business, professional practice, or other closely held operating company. Several benefits drive the decision.

Pass-Through Taxation

An S corporation generally pays no federal income tax on its operating income at the entity level. Income instead passes through to the shareholders and is reported on their individual returns. This avoids the classic C corporation double tax, in which income may be taxed once at the corporate level and again when it is distributed as dividends.

Potential Payroll Tax Savings

One of the most discussed benefits is that S corporation pass-through income and distributions are generally not subject to self-employment tax, while wages paid to shareholder-employees are subject to payroll taxes. This creates a legitimate planning opportunity. An owner who works in the business can receive reasonable W-2 wages for services performed and can then take distributions of remaining after-tax profits, provided the shareholder has sufficient stock basis. This is not an invitation to take little or no payroll. Shareholder-employees must be paid reasonable compensation before taking nonwage distributions, a rule discussed in detail below.

Liability and Administrative Separation

An S corporation can help separate business operations from the owner’s personal finances. The structure supports separate bank accounts, separate payroll, clear accounting records, formal ownership records, business credit and contracts in the company name, and a cleaner path toward succession or sale. This separation is not a substitute for legal advice, insurance, or proper corporate formalities, but it provides a sound foundation.

Owner Benefit Planning

S corporations may provide access to fringe benefits, retirement plans, accountable plans, and health insurance arrangements. Owners should understand, however, that more-than-2% shareholders are subject to special rules for many fringe benefits, especially health insurance under Sections 1372 and 162(l), as explained later in this guide.

Separating Compensation from Return on Investment

A sole proprietor generally pays self-employment tax on all net Schedule C business income. In an S corporation, the owner’s labor is compensated through wages, while the owner’s return on business ownership may be paid out as distributions. That distinction is powerful, but it must be reasonable, documented, and supported by the facts of the business.

3. When an S Corporation Is Usually a Good Fit

The election tends to work well when the business is profitable after paying the owner a reasonable salary, operates as an active business rather than a passive asset-holding entity, has one class of stock and eligible shareholders, maintains clean books and payroll records, does not plan to hold substantial appreciated real estate inside the entity, can absorb the cost of payroll compliance and annual tax preparation, and has owners who understand that distributions are not unlimited tax-free withdrawals.

There is no universal income threshold at which an S corporation becomes worthwhile. The answer depends on the owner’s reasonable salary, payroll tax costs, state taxes, accounting fees, retirement plan goals, health insurance, and expected distributions. As a practical matter, the election is usually more compelling when the business produces enough profit to pay a market-based reasonable salary to the working owner, cover payroll taxes and processing costs, fund separate bookkeeping and tax return preparation, and still leave distributable profit after all of the above. If the business barely breaks even, has inconsistent cash flow, or cannot pay the owner a reasonable W-2 wage, S corporation status may add compliance burden without meaningful tax benefit.

4. Reasonable Compensation: The Rule S Corporation Owners Cannot Ignore

Reasonable compensation is one of the most important S corporation compliance issues. A shareholder who performs services for the corporation cannot simply take all business profits as distributions. Under Section 3121(d), corporate officers who perform more than minor services and receive remuneration are employees for employment tax purposes, and the form of payment is not controlling. Calling a payment a draw, a distribution, a loan, or a dividend does not determine its tax character. If the payment is really compensation for services, the IRS may recharacterize it as wages subject to payroll taxes and withholding.

Why the IRS Cares

Because pass-through income and distributions generally escape self-employment tax while wages do not, shareholder-employees have an incentive to minimize W-2 wages and maximize distributions. The IRS and the courts have repeatedly scrutinized arrangements in which shareholder-employees took substantial distributions while paying themselves little or no salary, and the IRS has clear authority to recharacterize disguised distributions as compensation subject to employment tax.

Reasonable Compensation Is Not a Flat Percentage

There is no single safe percentage, formula, or one-size-fits-all amount. Reasonable compensation depends on the facts and circumstances. Courts and the IRS weigh the shareholder’s role in the company, the duties performed, the hours worked, the shareholder’s training, licenses, and experience, comparable compensation for similar positions in similar businesses, the size and complexity of the company, its gross revenue and profitability, the compensation paid to non-owner employees, prior compensation and distribution history, the return on investment remaining after compensation, and whether the parties dealt at arm’s length.

The Watson Lesson

In David E. Watson, P.C. v. United States, a CPA shareholder paid himself a relatively low salary while receiving large distributions from his accounting firm. The Eighth Circuit upheld the IRS’s authority to recharacterize a portion of those distributions as wages, emphasizing the shareholder’s qualifications, experience, hours, and role in generating the firm’s income. The takeaway is clear. Even when an S corporation pays some wages, the IRS can argue those wages were too low if the facts show the shareholder’s services were worth more.

Consequences of Getting It Wrong

If distributions are reclassified as wages, the corporation may owe employer FICA, FUTA, income tax withholding, failure-to-file and failure-to-deposit penalties, accuracy-related or negligence penalties, and interest. These amounts can accumulate quickly across multiple open years.

Practical Best Practices

Every S corporation with a working owner should maintain an annual reasonable compensation file containing the owner’s job description, hours and duties, comparable wage data, payroll history, any bonus policy, a revenue and profitability analysis, the distribution history, notes explaining why the salary was considered reasonable, and payroll tax deposit records. A formal reasonable compensation study is especially important when distributions are significant compared to wages.

5. S Corporation Distributions Are Not Automatically Tax-Free

One of the most common misunderstandings among owners is the belief that S corporation distributions are always tax-free. They are not. When the corporation has no accumulated earnings and profits, Section 1368(b) provides that a distribution is excluded from gross income only to the extent it does not exceed the shareholder’s adjusted stock basis. Any excess is treated as gain from the sale or exchange of property, which generally means capital gain to the shareholder.

Stock Basis Is the Gatekeeper

A shareholder’s stock basis generally starts with what the shareholder contributed or paid for the stock and is then adjusted annually. Under Section 1367, basis is increased by items such as pass-through income and decreased, but never below zero, by distributions, losses, deductions, and nondeductible expenses. If losses and deductions exceed remaining stock basis, certain excess amounts may reduce the shareholder’s basis in bona fide loans made directly to the corporation. In simplified terms, the annual ordering increases basis for income items first, then reduces basis for distributions, then reduces basis for nondeductible expenses and losses subject to the ordering rules and available elections, with any suspended losses tracked and carried forward when basis is insufficient.

Form 7203: The Shareholder Basis Form

Form 7203 is used to calculate and report S corporation shareholder stock and debt basis. Under the IRS instructions, a shareholder must file it when claiming a deduction for a loss from the S corporation, when receiving a nondividend distribution, when disposing of S corporation stock, or when receiving repayment of a shareholder loan from the corporation. Even in years when the form is not required, maintaining it keeps the basis computation consistent from year to year. Basis tracking is ultimately a shareholder-level responsibility. Schedule M-2 and the accumulated adjustments account are corporate-level records, and they do not replace the shareholder’s own basis computation.

Corporate Debt Does Not Automatically Create Shareholder Basis

This is a major trap. A shareholder generally receives debt basis only from bona fide debt owed directly by the corporation to that shareholder. A third-party bank loan, SBA loan, line of credit, equipment loan, credit card balance, or other corporate liability does not create shareholder debt basis merely because the corporation owes money. Even a shareholder guarantee of corporate debt generally does not create debt basis unless and until the shareholder actually makes payment and becomes the direct creditor. Regulation Section 1.1366-2 requires bona fide indebtedness running directly to the shareholder, determined under general federal tax principles based on all facts and circumstances.

Debt Basis Helps Losses, Not Tax-Free Distributions

Debt basis is often misunderstood. It can help a shareholder deduct losses when stock basis is insufficient, but it does not make distributions tax-free. Distributions are measured against stock basis under Section 1368. That distinction becomes crucial in cleanup projects involving negative equity and excessive owner draws.

6. Schedule M-2, AAA, OAA, and Why They Matter

Schedule M-2 on Form 1120-S tracks several corporate-level accounts, including the accumulated adjustments account, known as AAA, accumulated earnings and profits in certain cases, and the other adjustments account, known as OAA. Schedule M-2 is intended to show the changes in accounts that affect S corporation retained earnings and the ordering of distributions.

AAA: The Accumulated Adjustments Account

AAA generally tracks previously taxed S corporation income that has not yet been distributed. It is increased by taxable income items and decreased by losses, deductions, nondeductible expenses, and nondividend distributions. AAA is not the same as shareholder basis. A shareholder may have stock basis even when AAA is zero, and in a multi-shareholder company AAA will not reflect any particular shareholder’s basis. In a single-shareholder company the two may appear to move together, but they serve different purposes and must be tracked separately.

OAA: The Other Adjustments Account

OAA generally tracks items that affect basis but not AAA, most notably tax-exempt income. Tax-exempt income increases shareholder basis under Section 1367 but does not increase AAA under Section 1368(e)(1), so it is tracked in OAA instead. This became especially relevant for businesses that received tax-exempt items such as certain forgiven relief funds. The accounting must be handled carefully because the same dollars cannot be used twice to support distributions.

Schedule M-2 Is Not a Plug Account

Schedule M-2 should be reconciled, never forced. If book retained earnings, Schedule L, AAA, OAA, and shareholder basis do not agree, the answer is not to plug net income, distributions, or loans until the forms tie. The answer is to identify the reason for the difference, which may include book-tax differences, prior-year tax adjustments never posted to the books, nondeductible expenses, tax-exempt income, timing differences, incorrectly recorded distributions, misclassified loans, missing payroll entries, prior-year return errors, or incorrect beginning balances. When M-2 is forced, the error almost always grows over time.

7. A Practical Cleanup Example: Negative Equity, Excess Distributions, M-2 Errors, and Shareholder Loan Problems

The following example is fictional, anonymized, and simplified. It reflects fact patterns commonly seen in S corporation cleanup projects, and the years, amounts, and details are illustrative only.

Assume a single-shareholder S corporation has operated for several years. The shareholder regularly withdraws cash from the company. The books show negative equity beginning partway through the period, yet the shareholder continues taking distributions in later years. A high-level summary might look like this:

Year	Book Equity at Year-End	Owner Withdrawals	Tax Return M-2 Ending Balance	Notes
Year 1	$18,000	$20,000	$42,000	Books and return do not reconcile
Year 2	$6,000	$35,000	$15,000	Prior-year adjustments unclear
Year 3	$(22,000)	$58,000	$0	Distributions continue despite negative equity
Year 4	$(47,000)	$72,000	$(8,000)	Some draws reclassified as shareholder loan
Year 5	$(115,000)	$96,000	$(90,000)	Corporate debt treated informally as basis support
Year 6	$(210,000)	$125,000	Not yet filed	Proposed entry to move draws to loan receivable

The company also carries a large corporate loan on its balance sheet, and prior records suggest that the loan was viewed as supporting the shareholder’s ability to take tax-free distributions. There is also an old loan-to-shareholder receivable that has never been repaid, has no written note, and has no interest income recorded. The current-year preparer is asked whether the company can simply reclassify another large portion of cumulative owner draws to a shareholder loan receivable in order to restore equity to approximately zero. This fact pattern raises several serious issues.

Negative Book Equity Is a Warning Sign

Negative book equity does not automatically mean the shareholder has taxable excess distributions, because book equity and tax basis are different measurements. Negative equity combined with repeated owner withdrawals, however, is a strong signal that shareholder basis may have been exhausted. The shareholder’s actual stock basis must be reconstructed year by year under Section 1367 before any conclusions are drawn.

Distributions Above Stock Basis Are Capital Gain

If the corporation has no accumulated earnings and profits, distributions are tax-free only to the extent of stock basis, and any excess is treated under Section 1368(b) as gain from the sale or exchange of property. A shareholder who keeps taking distributions after stock basis reaches zero may therefore have capital gain even though no stock was ever formally sold.

Corporate Debt Does Not Create Stock Basis

The corporation’s bank loan, SBA loan, equipment note, or line of credit does not increase the shareholder’s stock basis, and it does not create debt basis merely because the shareholder owns the company. Debt basis requires bona fide debt running directly from the corporation to the shareholder under Section 1366(d)(1)(B) and Regulation Section 1.1366-2. Even valid debt basis supports loss deductions; it does not convert taxable distributions into tax-free ones.

Reclassifying Draws as Loans After the Fact Is Risky

A loan receivable from the owner may be respected if it represents bona fide debt, but a year-end or multi-year reclassification made solely to avoid taxable distributions is vulnerable to challenge. The factors that support bona fide debt include a written promissory note, a stated principal amount, a fixed maturity date, interest at a market rate or at least the applicable federal rate, regular payments, corporate authorization, recorded interest income, evidence that the shareholder intended and had the ability to repay, collection activity when payments are missed, and consistent treatment on the books and returns. A loan with no note, no interest, no maturity date, no repayments, and no collection expectation may be recharacterized as a distribution, as compensation, or as another form of payment depending on the facts.

AAA and OAA Errors Can Distort Distribution Reporting

Assume the corporation had a small OAA balance from tax-exempt income. The return preparer used that OAA balance to absorb distributions in one year, then accidentally carried the same balance forward and used it again in a later year. That duplicate use creates an artificial difference between the return’s M-2 accounts and the books. OAA properly tracks tax-exempt income that affects basis but not AAA, but the same OAA dollars can never be used repeatedly to support distributions.

The Current Return Should Not Be Built on Bad Opening Balances

If the prior-year ending stock basis, AAA, OAA, loan balances, and retained earnings are unreliable, the current-year return should not simply roll the errors forward. A proper cleanup reconstructs shareholder stock basis year by year, identifies any legitimate debt basis, separates true loans from distributions, corrects the AAA and OAA rollforwards, reconciles Schedule M-2 to Schedule L and to the books, determines whether excess distributions created capital gain, reviews which years remain open for amendment, checks whether the shareholder’s individual returns reported any required gain, and establishes a going-forward policy for payroll, distributions, loans, and reimbursements.

The key lesson is that S corporation distributions require discipline. A profitable S corporation can absolutely distribute cash, but distributions must be tracked against stock basis, corporate debt is not shareholder basis, a shareholder loan must be real debt, and Schedule M-2 should explain activity rather than serve as a plug. When an S corporation shows negative book equity alongside ongoing draws, the owner and the tax advisor should pause and rebuild the records before filing another return.

8. Health Insurance for More-Than-2% Shareholders

Health insurance is another area where S corporation rules are frequently mishandled. Under Section 1372, a more-than-2% shareholder is treated as a partner for purposes of certain fringe benefits, which means the shareholder does not receive the same tax-free treatment that a rank-and-file employee may receive.

How the Deduction Works

A more-than-2% shareholder may claim the self-employed health insurance deduction under Section 162(l), but only if the plan is considered established by the S corporation. Under IRS Notice 2008-1, that requirement is met when the corporation pays the premiums directly during the year, or when the shareholder pays the premiums, provides proof of payment, and the corporation reimburses the shareholder during the year. If the shareholder pays for the policy personally and the corporation never pays or reimburses the premiums and includes them in the shareholder’s wages, the deduction is generally not allowed.

W-2 Reporting

Premiums paid or reimbursed for a more-than-2% shareholder-employee are deductible by the corporation and must be included in the shareholder’s Form W-2 Box 1 wages, subject to federal income tax withholding. When paid under a qualifying plan, the premiums are generally not subject to FICA or FUTA, which means they appear in Box 1 but not in Boxes 3 or 5.

The Earned Income Limitation

The shareholder needs earned income from the S corporation to support the deduction, and IRS guidance ties earned income for this purpose to the shareholder’s Medicare wages from that corporation. A shareholder who has only health insurance reported in Box 1 and no actual FICA wages may not have sufficient earned income to claim the deduction. This is one more reason reasonable payroll matters.

ACA and Reimbursement Arrangement Caution

Arrangements that reimburse individual health policies can raise Affordable Care Act market reform concerns. IRS Notice 2015-17 allows arrangements covering more-than-2% shareholder-employees to continue in reliance on Notice 2008-1 unless and until additional guidance provides otherwise, but that relief is limited and does not necessarily protect arrangements that also cover non-owner employees. Any reimbursement arrangement that includes regular employees should be reviewed carefully before it is put in place.

As an annual checklist, each more-than-2% shareholder should confirm that the corporation either paid or reimbursed the premiums during the year, that proof of payment was provided if reimbursed, that the premiums were included in W-2 Box 1 and excluded from Social Security and Medicare wages where appropriate, that the shareholder had sufficient earned income from the corporation, that the arrangement does not improperly include non-owner employees, and that the individual return claims the deduction correctly.

9. Why Real Estate Often Should Not Be Held in an S Corporation

S corporations are often excellent for operating businesses and often poor vehicles for holding appreciating real estate. This does not mean real estate can never sit inside an S corporation, but before placing property into one, or leaving property inside a corporation that elects S status, the owner should understand the exit problem.

Appreciated Property Distributions Trigger Gain

If an S corporation distributes appreciated property to a shareholder, the corporation recognizes gain under Section 311(b) as if it had sold the property at fair market value, and that gain passes through to the shareholders. This can create tax even though no cash changes hands. For example, assume an S corporation owns a building with a tax basis of $300,000 and a fair market value of $900,000. If the corporation distributes the building to the shareholder, it recognizes $600,000 of gain as though it had sold the building, and that gain passes through to the shareholder even though the shareholder received property rather than cash. The shareholder’s basis in the property generally becomes its fair market value and the distribution itself is tested under Section 1368, but the current tax cost can be painful.

No Easy Partnership-Style Exit

Partnerships and LLCs taxed as partnerships often provide far more flexibility for real estate. Appreciated property can often be distributed from a partnership without immediate gain recognition, subject to special rules, and partnerships can make basis adjustments under Section 754 when an interest is transferred or an owner dies. S corporations offer no comparable inside-basis adjustment for corporate assets.

Debt Basis and Real Estate Losses

Real estate usually involves debt. Partners may receive outside basis from certain partnership liabilities, but S corporation shareholders generally receive no stock or debt basis from entity-level debt or from guarantees. Only direct shareholder loans to the corporation can create debt basis. This can limit the deductibility of real estate losses inside an S corporation far more severely than owners expect.

Built-In Gains Tax for Former C Corporations

If a corporation operated as a C corporation before electing S status, appreciated assets held at conversion may be subject to the built-in gains tax under Section 1374 if they are disposed of during the recognition period. The tax is imposed at the corporate level and can apply both to asset sales and to distributions of appreciated assets, subject to limitations including the net unrealized built-in gain, the current recognition limit, and the taxable income limit.

For rental properties and appreciating real estate, an LLC taxed as a partnership is often the more flexible vehicle. Before transferring real estate into an S corporation, consider future sale and refinance plans, estate planning and basis step-up concerns, liability protection, loss deductibility, debt allocation, possible built-in gains tax, state transfer taxes, and the ultimate exit strategy. Once appreciated real estate is inside an S corporation, getting it out can be expensive.

10. Shareholder Loans: What Makes a Loan Real?

Shareholder loans are common in closely held S corporations, and they can be legitimate and useful, but they must be documented and respected. It helps to distinguish the two directions a loan can run. When the shareholder lends money to the corporation, for example by advancing funds to cover payroll, the loan may create debt basis if it is bona fide and owed directly to the shareholder. When the corporation lends money to the shareholder, for example when the owner takes company cash personally, the advance must be bona fide debt or it may be treated as a distribution, as compensation, or as some other form of payment.

A direct loan from a shareholder to the corporation should be supported by an executed note, interest at least at an appropriate rate based on the applicable federal rate, and payments made according to the terms. A corporation-to-shareholder loan deserves even more care, because it should never be used casually to explain away owner draws. If the owner receives cash and the company later decides to call it a loan only because basis is insufficient, the characterization is likely to be challenged. A bona fide corporation-to-shareholder loan should include a written note, an interest rate, a repayment schedule, a maturity date, security where appropriate, board or shareholder authorization, actual repayments, interest income recorded by the corporation, proper year-end reporting, and evidence of intent to repay at the time the funds were advanced. If the shareholder will not realistically repay the amount, it usually should not be booked as a loan.

11. Loss Limitations: Basis, At-Risk, Passive Activity, and Excess Business Loss Rules

S corporation losses do not automatically reduce a shareholder’s taxable income, because losses can be limited at several successive levels. First, under Section 1366(d), a shareholder’s aggregate losses and deductions are limited to the sum of adjusted stock basis and adjusted basis in debt the corporation owes directly to the shareholder, and losses disallowed for lack of basis are suspended and carried forward until basis is restored. Second, even when basis exists, the shareholder must be at risk under Section 465, and shareholders generally do not increase their at-risk amount merely because the corporation has debt or because they guaranteed corporate debt. Third, if the shareholder does not materially participate, the passive activity loss rules may further limit deductions, and rental real estate held in an S corporation is especially likely to require careful passive activity analysis. Finally, individual shareholders may face the excess business loss limitation under Section 461(l), which recent legislation has made a permanent feature of the law. Before assuming an S corporation loss is deductible, confirm stock basis, debt basis, the at-risk amount, the passive or nonpassive classification, the excess business loss limitation, and any state-specific rules.

12. Operating an S Corporation Correctly: Annual Compliance Guidance

The best S corporation tax planning is not done only at year-end. It is maintained throughout the year through a handful of consistent habits.

Maintain Separate Books and Bank Accounts

The corporation should have its own bank accounts, credit cards, accounting records, payroll system, and documentation. Personal expenses should not run through the corporate account, and when the corporation does pay a personal expense, it must be classified correctly as wages, a distribution, a loan, a reimbursement, or a repayment rather than left in an ambiguous suspense account indefinitely.

Use an Accountable Plan

An accountable plan allows the corporation to reimburse business expenses that the shareholder paid personally without treating the reimbursement as taxable wages, provided the rules are followed. Reimbursements should be substantiated with receipts, a documented business purpose, mileage logs where relevant, and timely accounting.

Run Payroll Properly

Shareholder-employees should be on payroll before taking distributions. Proper payroll includes regular wages, federal and state withholding, employer payroll taxes, timely deposits, quarterly Forms 941, annual Forms W-2 and W-3, state unemployment and withholding filings, reasonable compensation documentation, and correct health insurance reporting for more-than-2% shareholders.

Track Distributions Separately

Distributions should be posted to a shareholder distribution account, never to wages, loans, or miscellaneous expense. Before large distributions are made, the company should estimate current-year taxable income, beginning stock basis, prior distributions, nondeductible expenses, expected losses, and AAA and OAA activity, and should ask specifically whether the distribution may exceed stock basis.

Document Loans When They Happen

If money is loaned to or from a shareholder, document it at the time of the advance. Waiting until tax preparation season to paper a loan invites recharacterization.

Reconcile Books to the Tax Return Annually

After the return is prepared, the books should be updated for tax-basis adjustments, depreciation differences, nondeductible expenses, shareholder health insurance, distributions, and any prior-year adjustments. The Schedule L balance sheet, Schedules M-1 and M-2, retained earnings, AAA, OAA, and the shareholder basis schedule should all be reviewed for consistency.

13. Common S Corporation Mistakes

Most S corporation problems are preventable, and they tend to cluster in five areas. Payroll mistakes include paying no W-2 wages to a working shareholder, paying wages that are too low relative to distributions, missing payroll tax deposits, treating officer compensation as contractor payments, failing to report shareholder health insurance correctly, and waiting until December to guess at a salary. Distribution mistakes include assuming distributions are always tax-free, taking distributions with no basis calculation, continuing draws despite negative equity, treating corporate debt as if it created shareholder basis, ignoring capital gain on excess distributions, and failing to attach Form 7203 when it is required.

Loan mistakes include reclassifying draws as loans after the fact and maintaining loans with no note, no interest, no repayment schedule, and no actual repayments, as well as netting multiple loans together and treating shareholder guarantees as debt basis. Bookkeeping mistakes include mixing personal and business expenses, posting owner draws to expense accounts, leaving old payroll liabilities unresolved, failing to post tax depreciation adjustments, using Schedule M-2 as a plug, duplicating OAA or tax-exempt income adjustments, and failing to reconcile retained earnings to prior returns. Entity structure mistakes include holding appreciated real estate in an S corporation without an exit plan, converting a C corporation with appreciated assets without a built-in gains analysis, admitting ineligible shareholders, creating a second class of stock through improper agreements, and transferring ownership without tax review.

14. A Year-End S Corporation Checklist

Before year-end, S corporation owners should sit down with their CPA and work through several questions. On payroll and compensation, confirm whether the shareholder-employee has received reasonable W-2 compensation, whether year-end bonuses are needed, whether payroll deposits are current, whether health insurance is properly included in W-2 Box 1, and whether retirement plan contributions are coordinated with W-2 wages.

On basis and distributions, establish beginning stock basis, estimate current-year income or loss, total the distributions already taken, determine whether any distributions will exceed stock basis, confirm whether Form 7203 is required, and identify any suspended losses carried from prior years. On loans, identify any shareholder advances to the corporation and any corporate payments made to or for the shareholder personally, and confirm that notes, interest, and repayment terms are documented and that interest payments were actually made and recorded.

On books and records, verify that bank accounts are reconciled, personal expenses are identified, fixed assets are updated, loans are reconciled to statements, payroll liabilities are correct, and distributions are classified properly. On entity and ownership matters, review whether ownership changed during the year, whether all shareholders remain eligible, whether only one class of stock exists, and whether the operating agreement, bylaws, and any shareholder agreements remain consistent with the S corporation rules. Finally, on real estate and asset planning, determine whether the corporation owns appreciated real estate, whether a sale, refinance, or distribution is being considered, whether the corporation was formerly a C corporation, and whether a built-in gains analysis is needed.

15. Key Takeaways for S Corporation Owners

S corporations can be extremely valuable when used correctly, but the benefits depend on disciplined compliance. The most important principles are these. An S corporation is not a payroll tax loophole, and working shareholders need reasonable W-2 wages before taking significant distributions. Distributions are not automatically tax-free; they are tax-free only to the extent permitted by the shareholder’s stock basis and the distribution ordering rules. Corporate debt does not create shareholder basis, so bank loans, SBA loans, credit lines, and guarantees generally support neither tax-free distributions nor basis. Debt basis is limited, requires bona fide debt owed directly to the shareholder, and matters primarily for loss deductibility. Shareholder loans must be real, because reclassifying draws as loans after the fact is risky without notes, interest, repayment terms, and actual repayment activity.

Schedule M-2 matters, but it is not basis, and AAA and OAA must be tracked correctly rather than used as plug accounts. Health insurance for more-than-2% shareholders follows special rules, and premiums generally must be paid or reimbursed by the corporation, included in W-2 Box 1, and deducted properly on the shareholder’s return. Real estate often does not belong in an S corporation, because appreciated property distributions can trigger gain and the structure lacks the partnership-style planning advantages real estate usually needs. Clean records prevent expensive cleanup projects, so basis schedules, payroll documentation, loan agreements, and book-tax reconciliations should be maintained every year. Above all, facts matter, and the correct tax treatment always depends on the history, the documents, the intent, the payments, and the reporting.

A Final Thought

An S corporation can be a powerful tax structure for the right business owner. It can also become a costly problem when the owner treats the company bank account as personal funds, skips payroll, ignores basis, or uses loans and M-2 entries to force the tax return to work. The best approach is proactive. Establish the right structure, pay reasonable compensation, report shareholder benefits correctly, track basis annually, document loans when they happen, and review distributions before cash leaves the company. For owners already operating as S corporations, a periodic compliance review can identify problems before they turn into amended returns, unexpected capital gains, payroll tax exposure, or a difficult cleanup project.

Jessica Irving Marschall, CPA is President and CEO of Marschall Accounting Services, LLC. She can be reached at (414) 217-0147, by email at Jmarschall@MarschallAccountingService.com, or through the firm’s website at www.MarschallTax.com.