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Keep a contemporaneous, signed loan instrument and a complete transaction trail for every advance between a corporation and a shareholder. The file should show who lent and borrowed the money, the principal, interest rate, repayment period, default consequences, movement of cash, accounting treatment, repayment behavior, and the borrower’s ability to repay. A promissory note helps, but it does not by itself establish that a genuine tax loan existed.
This guidance addresses U.S. federal tax evidence. State corporate-law approvals, non-U.S. rules, and the facts of a particular company or shareholder may require additional advice.
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First, identify which direction the money moved
A company-to-shareholder advance and a shareholder-to-company loan are different transactions. The lender, borrower, tax consequences, and records needed to support the position change with the direction of the funds.
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1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problems| Transaction | Lender | Borrower | Evidence questions to answer |
|---|---|---|---|
| Company-to-shareholder (upstream) | Corporation | Shareholder, officer, or both | Was there a real obligation to repay, arm’s-length terms, repayment capacity, and actual enforcement? Could personal expenses instead be compensation, a distribution, or another payment? |
| Shareholder-to-company (downstream) | Shareholder | Corporation | Is there a formal note or an open-account balance? If the company is an S corporation, how is shareholder debt basis tracked and reported? |
When the shareholder also performs services, a company’s advance can be examined as a possible loan, compensation, distribution, or other category. The label in a ledger does not control. The Internal Revenue Service looks at the parties’ intent and objective evidence, including the paperwork, terms, financial-statement treatment, ability to repay, enforcement, repayment history, and how the money was used.
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Build one evidence file for each advance
Keep the documents together by loan or note rather than scattering them among general accounting records. A reviewer should be able to reconstruct the balance from the date funds were advanced through the date the debt was paid, amended, offset, forgiven, or otherwise resolved.
1. Signed loan agreement or promissory note
The instrument should identify the lender and borrower and state:
- Original principal and the date it was advanced.
- The interest rate and how interest is calculated.
- Payment amounts, payment dates, maturity date, or another definite repayment period.
- Whether collateral or a guaranty secures the obligation.
- What happens after a missed payment or other default.
- How amendments, extensions, refinancing, offsets, or forgiveness must be approved.
For a corporate loan to an officer, IRS guidance describes arm’s-length characteristics this way: “That is, there should be a contract with a stated interest rate, a specified length of time for repayment, and a consequence for failure to repay the loan.” The same guidance notes that collateral would indicate a loan. A note form can help record these terms, but signing a form after the fact does not prove that the parties intended a bona fide debt when the money moved.
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Retain the company’s bank statement, wire confirmation, cancelled check, or electronic-transfer record showing the date and amount delivered. If the advance paid a bill directly, keep the invoice and payment record and explain in the ledger that the payment was made on the borrower’s behalf. For a series of advances, preserve each transfer rather than relying on a single year-end total.
3. A dated loan ledger or amortization schedule
The schedule should reconcile from opening balance to closing balance. At a minimum, show:
- Opening principal.
- Each additional advance, with date and amount.
- Interest accrued and the method used to calculate it.
- Each principal payment and interest payment.
- Any late charge, capitalization, offset, or other adjustment.
- Ending principal and accrued interest.
Keep the ledger consistent with the general ledger, financial statements, and tax workpapers. If the books call an amount a receivable while the parties treat it as an informal draw that is never billed or collected, that inconsistency can undermine the claimed loan characterization.
4. Proof of repayment and interest payments
Save bank records, deposit slips, payment confirmations, and correspondence showing every payment. Identify whether each payment reduced principal, paid interest, or covered another charge. If payments were made by payroll deduction, distribution offset, or a transfer from another account, retain the authorization and accounting entry that explains the offset.
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5. Evidence of the borrower’s ability to repay
Keep financial information that existed when the loan was made, such as a cash-flow forecast, personal financial statement, projected business receipts, or other contemporaneous analysis. Later records should show whether the borrower performed against the agreed terms. A forecast that supported repayment at origination, followed by regular payments, is more informative than a document created only after an examination begins.
6. Corporate approvals and later changes
Retain minutes, written consents, or other approvals required by the company’s governing documents and applicable law. For every amendment, extension, refinance, forgiveness, or offset, keep the signed approval, revised terms, valuation or calculation supporting the change, and the related money movement. Do not replace the original note with a backdated document; preserve the original and document the actual modification date.
Make the documents and conduct tell the same story
The central federal tax question is whether the parties intended a repayment obligation when funds moved and then acted like creditor and debtor. IRS material identifies several objective factors:
- Degree of control between the parties.
- Customary loan documentation and whether the terms are definite.
- Interest and repayment terms.
- How the balance appears in financial statements and books.
- The borrower’s capacity to repay.
- Whether the lender enforced the agreement after missed payments.
- The actual repayment history.
- What the shareholder did with the proceeds.
Repeated advances for personal expenses, no scheduled payments, automatic renewals, or a balance that grows without collection activity can conflict with a claimed loan. Conversely, regular billing, interest accrual, documented payments, and action after default support the stated terms. A ledger label, unsigned memo, or note prepared years later cannot determine the tax result by itself.
Interest rate and below-market issues
The rate should be stated in the instrument and applied consistently in the ledger. Whether a rate is adequate, and whether below-market-loan rules affect the parties, depends on the transaction’s substance and the applicable law. IRS guidance does not provide one universally appropriate rate for every company-shareholder loan. Do not select a rate solely because it appears in a template; document why the agreed terms were used and ask a tax professional to evaluate the facts, including whether the rate is at or below the applicable federal rate.
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Special recordkeeping when a shareholder lends to an S corporation
Debt from a shareholder to an S corporation can affect the shareholder’s ability to claim pass-through losses because debt basis is tracked separately from stock basis. Form 7203 instructions distinguish a formal note from open-account debt.
Formal notes
A formal note is a written instrument. Enter each formal note separately on the basis schedule. Multiple formal notes cannot be combined into one column, even when they have the same lender, rate, or maturity date. Keep the signed note, advance record, payment history, interest calculation, and year-end balance with the Form 7203 workpapers.
Open-account debt and the $25,000 threshold
Open-account debt is tracked through a running account rather than a separate written instrument. Under the Form 7203 instructions, any open-account debt exceeding $25,000 at the end of the prior tax year is treated as a formal note at the beginning of the next tax year. At that point, separately track the debt as a note and retain the documentation needed to support the conversion and balance.
Guarantees are not advances
A shareholder’s guarantee or co-signature on a company loan does not itself create debt basis. The shareholder generally must actually pay the guaranteed obligation before that payment can be relevant to basis. Keep evidence of any payment made under a guarantee and do not record the guarantee alone as a shareholder loan.
Schedule K-2 and K-3 detail
For specified shareholder-loan transactions, the 2025 Schedules K-2 and K-3 instructions require separate loan detail when the filing instructions apply, including lender or borrower identity, date, amount, and interest expense or income. These international-tax schedule rules do not automatically apply to every S corporation. Check the instructions for the applicable tax year and the corporation’s facts.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Do not treat withdrawn proposed regulations as current law
IRS materials once described proposed related-party debt documentation regulations. The IRS later stated that the final regulations imposing those minimum documentation requirements were withdrawn. Therefore, do not present the withdrawn proposal as a universal current checklist or claim that every company-shareholder loan fails without each proposed item.
The practical records remain valuable because they show what actually happened: the agreed terms, movement of cash, accounting, repayment capacity, and performance. They support the facts without converting a withdrawn proposal into a mandatory rule.
Retention: how long to keep the loan file
Use the tax consequences of the particular transaction to set the retention period. The 2025 Form 1120 instructions generally call for records supporting return income, deductions, or credits to be kept for three years from the return due date or filing date, whichever is later. Basis records must be kept as long as necessary to determine basis.
IRS general retention guidance lists important exceptions:
- Seven years for records supporting a worthless-securities or bad-debt deduction.
- Six years when a return omits more than the applicable substantial amount of income.
- Indefinitely when a return was not filed or was fraudulent.
- At least four years for employment-tax records.
Keep the complete loan file for as long as it could affect a filed or amended return, shareholder debt basis, a bad-debt claim, another open tax issue, or a legal obligation. A simple three-year deletion rule is not safe for every loan. Preserve the original note, amendments, ledgers, bank records, tax schedules, and evidence of final repayment or other resolution together.
A practical preparation workflow
- Classify the direction. Record whether the corporation or shareholder is the lender and whether the borrower is also an officer or service provider.
- Set terms before funding. Sign the note or agreement before, or contemporaneously with, the advance. State principal, interest, repayment period, and default consequences.
- Fund through traceable channels. Use a bank transfer, check, or documented direct payment and retain the confirmation.
- Open a dedicated loan schedule. Post every advance, accrual, payment, and adjustment and reconcile it to the general ledger.
- Test repayment capacity. Save the cash-flow or financial analysis available at origination and update the file when circumstances materially change.
- Service the debt. Invoice or debit scheduled payments, collect interest, and document any late-payment response under the agreement.
- Record changes promptly. Before extending, refinancing, forgiving, or offsetting the balance, obtain written approval and preserve the revised calculation.
- Apply S corporation rules where relevant. Separate each formal note, monitor the open-account threshold, and prepare any required K-2, K-3, or Form 7203 detail.
- Set a review date. At year-end and before filing the return, compare the note, bank activity, ledger, financial statements, and tax schedules for mismatches.
- Archive by tax effect. Retain the file through the longest period that could apply to the return, basis, bad-debt claim, employment tax, or other obligation.
Common weak evidence and how to correct it
| Weak practice | Why it creates risk | Better record |
|---|---|---|
| Only a year-end journal entry labeled “shareholder loan.” | It does not show intent, funding, terms, or repayment. | Signed instrument plus transfer confirmation and a running schedule. |
| Note signed after the advance with an earlier date. | A backdated document can look like an attempt to change the original facts. | Use the actual signing date and explain any later amendment separately. |
| No interest accrual or no scheduled payments. | Conduct may contradict a stated creditor-debtor relationship. | Calculate interest and follow the payment calendar; document an approved change. |
| Personal expenses paid without identifying the borrower. | The payments may be analyzed as compensation, a distribution, or another category. | Keep invoices, payment records, authorization, and the entry linking the expense to the note. |
| Shareholder guarantee recorded as debt basis. | A guarantee alone is not an advance to the S corporation. | Track an actual payment made under the guarantee and its tax treatment. |
| Deleting the file three years after filing. | Basis, bad-debt, fraud, or other exceptions can extend retention. | Keep the complete file until all potentially affected matters are closed. |
When professional review is warranted
Obtain advice from a tax professional experienced with closely held businesses when a balance is large, terms are below market, the borrower is also an employee or officer, payments are irregular, the company plans forgiveness or offset, an S corporation shareholder needs debt basis, or state corporate-law approvals are uncertain. A professional can evaluate classification and filing consequences; organized records make that review more reliable.
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