A loan from an S corporation to a shareholder is not taxable on its own, but only if it looks and behaves like a real loan. When it doesn’t, the IRS recharacterizes the money as a distribution or as wages, and the tax bill reaches back to the year the funds first left the corporate account. Everything in this area turns on whether the paperwork, the interest rate, and the repayment behavior would satisfy an outside lender.
What Makes the Loan a Loan
The IRS applies a facts-and-circumstances test, and no single item is decisive. What the agency looks for is the pattern an independent lender would insist on.1Internal Revenue Service. Valid Shareholder Debt Owed by S Corporation
- A written promissory note, signed before the money moves, stating principal, interest rate, and a fixed maturity date.
- Interest at least equal to the Applicable Federal Rate (AFR) published monthly by the IRS.2Internal Revenue Service. Applicable Federal Rates
- A realistic repayment schedule that the shareholder actually follows.
- Collateral, especially for larger balances.
- Real enforcement when payments are missed. Silence from the corporation reads as proof that repayment was never expected.1Internal Revenue Service. Valid Shareholder Debt Owed by S Corporation
There is no bright-line debt-to-equity ratio that disqualifies a loan automatically.1Internal Revenue Service. Valid Shareholder Debt Owed by S Corporation Still, a loan that dwarfs the shareholder’s equity investment raises an obvious question about whether repayment was ever plausible. A loan that checks most of these boxes will survive an audit; one held together by a handshake will not.
Interest, the AFR, and the $10,000 Exception
Charging interest below the AFR triggers Section 7872. The IRS treats the arrangement as two separate transactions: the corporation is deemed to transfer the “foregone interest” to the shareholder as a distribution, and the shareholder is deemed to pay it back to the corporation as interest income.3Office of the Law Revision Counsel. 26 U.S. Code 7872 – Treatment of Loans With Below-Market Interest Rates That interest income then flows through to every shareholder on their K-1, so one owner’s cheap loan raises everyone’s tax.
Demand loans and term loans get different mechanics. A demand loan uses the short-term AFR in effect during each year, with the imputed interest treated as transferred on December 31 of that year. A term loan compares the loan amount to the present value of the required payments discounted at the AFR on the day the loan is made; the difference is treated as a lump-sum transfer to the shareholder up front, with the loan then carrying original issue discount that accrues over its life.3Office of the Law Revision Counsel. 26 U.S. Code 7872 – Treatment of Loans With Below-Market Interest Rates The practical effect: on a term loan, the tax hit from a below-market rate is front-loaded into year one.
Section 7872 does not apply on any day the total outstanding balance between the corporation and the shareholder stays at or below $10,000.4Office of the Law Revision Counsel. 26 USC 7872 – Treatment of Loans With Below-Market Interest Rates That threshold is not indexed for inflation. Above it, imputed interest applies to the full balance, not just the excess.
The Loan Does Not Increase Your Basis
Receiving a loan from the S corporation adds nothing to either stock basis or debt basis.5Internal Revenue Service. S Corporation Stock and Debt Basis Basis measures what you have put into the corporation. A loan out to you is the opposite of an investment in.
Debt basis refers specifically to money a shareholder loans to the corporation. A shareholder who loans $75,000 to the S corporation gets $75,000 of debt basis and can use it to absorb losses beyond stock basis. A $75,000 loan going the other way creates no basis of any kind. And when a shareholder tries to manufacture basis by borrowing from the corporation and lending it back, courts look through the circular movement of the same cash and disallow the claimed increase.
If the IRS Recharacterizes the Loan as a Distribution
When the IRS concludes the loan was never real debt, the principal is treated as a distribution from the date the funds were advanced, not the year of the audit. What that distribution costs you depends on whether the S corporation carries accumulated earnings and profits (E&P) from prior C corporation years.
No Accumulated E&P
Most S corporations that have always been S corporations have none. The recharacterized amount is a tax-free return of capital up to your stock basis, and any excess is capital gain, long-term if you have held the stock more than a year.5Internal Revenue Service. S Corporation Stock and Debt Basis A shareholder with $50,000 of stock basis who receives a $100,000 “loan” that is recharacterized reports $50,000 as a tax-free return of capital and $50,000 as capital gain.
With Accumulated E&P
For former C corporations, Section 1368 imposes a three-layer ordering rule.6Office of the Law Revision Counsel. 26 U.S. Code 1368 – Distributions The recharacterized amount first comes out of the accumulated adjustments account (AAA), which is treated the same as a distribution from an S corporation with no E&P. Anything exceeding the AAA is then a dividend to the extent of accumulated E&P, taxed as ordinary dividend income rather than capital gain. Only after both layers are exhausted does the rest revert to return-of-capital-then-capital-gain treatment.
The dividend layer is the unpleasant surprise. Shareholders who assumed capital gain treatment can find a portion taxed as dividends instead. On top of either result, the 3.8% net investment income tax applies once modified adjusted gross income exceeds $250,000 (married filing jointly) or $200,000 (single).7Internal Revenue Service. Net Investment Income Tax
If the IRS Recharacterizes the Loan as Wages
Recharacterization as a distribution is not the only risk. When a shareholder who works in the business takes loans while drawing little or no salary, the IRS may reclassify the “loan” as wages. The agency’s position is that payments to a corporate officer for services are wages regardless of the label.8Internal Revenue Service. Wage Compensation for S Corporation Officers
Courts have upheld wage treatment where the “loans” were unsecured demand notes at no interest, drawn at the shareholder’s discretion, and repaid only by paper entries against amounts the corporation owed the shareholder.9Internal Revenue Service. S Corporation Employees, Shareholders and Corporate Officers Where the shareholder is doing real work and the “loan” is the main way value leaves the business, the IRS sees wages in disguise.
The employment tax exposure is larger than it looks. Social Security tax runs 6.2% on both the corporation and the shareholder up to the wage base of $184,500 in 2026, and Medicare tax runs 1.45% each with no ceiling.10Social Security Administration. Contribution and Benefit Base Shareholders above $200,000 owe an additional 0.9% Medicare tax. The corporation also owes federal unemployment tax and faces penalties for failing to file employment tax returns and to withhold and deposit. Because none of this was reported when it should have been, the back tax, penalty, and interest stack up across every year affected.
Reasonable compensation has no statutory formula. The factors courts weigh include the shareholder’s training and experience, hours devoted to the business, pay for comparable roles at comparable companies, and the corporation’s dividend history.8Internal Revenue Service. Wage Compensation for S Corporation Officers Paying a defensible salary before any loans go out is the cleanest protection.
If the Loan Is Forgiven
Forgiveness converts the outstanding balance into a distribution at the time of the cancellation, following the same ordering rules above — reducing stock basis first, with any excess taxed as capital gain (or as a dividend where accumulated E&P exists).5Internal Revenue Service. S Corporation Stock and Debt Basis If the loan was already vulnerable to recharacterization, forgiveness essentially confirms that conclusion, and the IRS can assess tax and interest running from each earlier year the shareholder should have reported the income, not just the year of forgiveness.
Section 108 provides narrow relief where the shareholder is insolvent or in a Title 11 bankruptcy when the debt is forgiven. The insolvency exclusion is capped at the amount by which liabilities exceed assets, and taking either exclusion generally requires reducing other tax attributes such as net operating losses and basis in assets.11Office of the Law Revision Counsel. 26 U.S. Code 108 – Income From Discharge of Indebtedness The relief shifts the tax to future years rather than removing it.
Deducting the Interest You Pay
Whether the shareholder can deduct interest paid on the loan follows the IRS’s tracing rules and depends on what the money was used for. Interest on funds used to buy investment assets is deductible as investment interest expense on Form 4952, subject to the net-investment-income limit.12Internal Revenue Service. Shareholder’s Instructions for Schedule K-1 (Form 1120-S) Interest on funds used for personal expenses is nondeductible personal interest. Whatever the shareholder pays, the corporation reports as interest income that passes through to all shareholders on their K-1s.
Reporting and Recordkeeping
The S corporation reports loans to shareholders on Schedule L of Form 1120-S, line 7, at both the beginning and end of the tax year.13Internal Revenue Service. Form 1120-S U.S. Income Tax Return for an S Corporation Interest income on the loan, including any imputed interest under Section 7872, flows through on Schedule K-1.12Internal Revenue Service. Shareholder’s Instructions for Schedule K-1 (Form 1120-S)
The paper trail matters as much as the return. Keep the signed promissory note, a ledger of every disbursement and repayment, bank records showing the cash movements, and documentation of any collateral. The IRS requires records for as long as they are needed to prove items on a return.14Internal Revenue Service. Recordkeeping In practice, that means keeping loan records for at least three years after payoff, and four years where employment tax exposure is possible.
Penalties on Top of the Tax
When a loan is recharacterized, the additional income tax is only the beginning. Section 6662 adds an accuracy-related penalty of 20% of the underpayment attributable to negligence or a substantial understatement of tax.15Office of the Law Revision Counsel. 26 U.S. Code 6662 – Imposition of Accuracy-Related Penalty on Underpayments A “substantial understatement” is generally an underpayment exceeding the greater of 10% of the tax required or $5,000, a threshold that recharacterized six-figure loans clear easily.
Interest runs on the underpayment from the original due date of each affected return, compounding daily. Where the recharacterization goes back three or four years, the interest alone can be significant. If the loan is reclassified as wages, the corporation faces a parallel set of penalties for failing to withhold, deposit, and file employment tax returns, plus its own share of FICA and FUTA.
The defense against all of this is the same set of steps that make the loan valid in the first place: a written note with arm’s-length terms executed before the money moves, real interest at or above the AFR, payments that actually clear the bank, and a corporation prepared to enforce the deal if the shareholder falls behind.