Partnership Loans to Partners: AFR Rules, Basis, and Penalties

The tax treatment of partnership loans to partners turns on a single threshold question: does the transfer qualify as a bona fide loan, or will the IRS treat it as a disguised distribution or a guaranteed payment? If the arrangement is a real debt, the principal is not income to the borrowing partner and the partnership carries a receivable. If it isn’t, the same cash can trigger capital gain, ordinary income, imputed interest, and a 20% accuracy-related penalty. Federal law treats a partner acting outside the partner capacity — borrowing money, for instance — as if dealing with a stranger, which is why the IRS holds these loans to arms-length standards.¹

What Separates a Loan From a Distribution

The tax stakes turn on this line. A properly structured loan creates no immediate tax event for the borrower because the obligation to repay offsets the cash received. A distribution, by contrast, is tax-free only up to the partner’s outside basis; any excess is capital gain.² Recharacterization as a guaranteed payment is worse in a different way: the money becomes ordinary income to the partner.

Courts and the IRS look at the whole picture, not any single fact. The factors that weigh in favor of loan treatment:

A signed promissory note or written loan agreement.
A stated interest rate at or above the Applicable Federal Rate.
A fixed maturity date and a specific repayment schedule.
Actual payments made on time.
Collateral or some form of security.
A borrower with the realistic financial capacity to repay.
Consistent reporting by both the partnership and the partner.

No one factor is decisive, but the more that are missing, the easier it is for the IRS to conclude the “loan” was really something else.¹ Open-ended advances with no maturity, no interest, and no repayments will not survive scrutiny regardless of what the parties call them.

Documentation That Actually Holds Up

A written loan agreement is the single most important piece of evidence. The promissory note should be signed by the borrowing partner and someone authorized to act for the partnership. It needs to state the principal, a maturity date, a payment schedule with specific amounts and frequencies, and an interest rate at or above the AFR. Collateral provisions strengthen the case. The partnership’s operating agreement should authorize partner loans and describe any approval process.

Paper alone is not enough. The partnership has to enforce the terms. If a partner misses payments and nothing happens, the IRS can treat the arrangement as if the note never existed, recharacterizing the principal as a distribution retroactively. Sending payment reminders, recording each payment, and charging any late fees the agreement provides for are what separate a real loan from a paper exercise.

The Applicable Federal Rate and Below-Market Loans

Every partnership loan to a partner has to carry interest at a rate that meets federal minimums. That benchmark is the Applicable Federal Rate, published monthly by the IRS.³ Short-term AFRs apply to loans of three years or less, mid-term to loans between three and nine years, and long-term to anything longer.

Charge less than the AFR and the loan becomes a “below-market loan,” and the imputed interest rules take over.⁴ The IRS pretends the loan carried the AFR regardless of what the parties agreed. The gap between actual interest and AFR interest is “forgone interest,” and the code treats it as two simultaneous transfers: the partnership pays that amount to the partner, and the partner pays it back as interest.

How the calculation works depends on the loan type:

Demand loans, repayable whenever the partnership asks, are recalculated each year using the current short-term AFR, with the forgone interest treated as transferred on the last day of the calendar year.⁴
Term loans with a fixed schedule are handled up front: the difference between the loan amount and the present value of required payments (discounted at the AFR) is treated as original issue discount. The partner is deemed to receive that excess when the loan is made, and interest is recognized over the loan’s life.⁴

The practical result is phantom income. The partnership reports interest income it never actually collected, and that income flows through the K-1s to every partner in the firm, not just the borrower. A below-market loan to one partner can raise the tax bill of every partner in the room.

The $10,000 De Minimis Exception

For compensation-related loans between a partnership and a partner, the below-market loan rules don’t apply on any day the total outstanding balance between borrower and lender is $10,000 or less. The exception disappears if a principal purpose of the interest arrangement is tax avoidance.⁴ Most partnership loans to partners exceed this threshold, so imputed interest applies to the vast majority.

How the Borrowing Partner Is Taxed

The principal of a bona fide loan is not income. That is the whole point of structuring the transfer as debt rather than a distribution. But the interest side is where partners get surprised.

Interest the partner pays, or is deemed to pay under the imputed interest rules, may or may not be deductible depending on what the money was used for. Personal interest is not deductible at all, so loan proceeds spent on a car or living expenses generate no offset. If the proceeds went into investments, the interest is investment interest, deductible only up to the partner’s net investment income for the year, with any excess carrying forward. If the proceeds funded a trade or business, the interest may be fully deductible as a business expense.⁵

This creates a real asymmetry. The partnership reports interest income (including imputed interest) no matter what the partner did with the cash. But the partner’s deduction depends entirely on how the money was spent. A partner who borrows below-market for personal use ends up with phantom income coming through the K-1 and no offsetting deduction anywhere.

What the Loan Does to Outside Basis

A loan from the partnership to a partner does not increase the borrowing partner’s outside basis. This runs opposite to how partnership liabilities work in the other direction: when a partnership borrows from a third party, each partner’s share of that liability generally adds to outside basis, treated as if the partner contributed the money.⁶

Loans running the other way don’t work like that. The borrowing partner receives cash but gets no basis increase. Two consequences follow. The partner cannot use the loan to absorb partnership losses that would otherwise be suspended for lack of basis, and cannot rely on the loan as basis supporting further tax-free distributions. Partners who confuse these two directions of lending sometimes claim losses or take distributions they can’t support, and the IRS catches it during basis reconciliation.

Self-Charged Interest

When a partner borrows from a partnership they own an interest in, interest flows in a circle: the partner pays the partnership, and the partnership allocates part of that interest income back to the same partner. Without a special rule, the partner’s share of the partnership’s interest income might be passive (flowing from a passive activity) while the corresponding interest deduction is nonpassive, leaving nothing to offset against nothing.

Treasury regulations solve this through the self-charged interest rule, which recharacterizes certain interest income from partner-partnership lending as passive activity income. It applies when the interest income and interest expense are recognized in the same tax year and covers guaranteed payments for the use of capital as well as ordinary interest. The regulation uses an “applicable percentage” formula to decide how much interest income gets recharacterized, keyed to the share of the partnership’s interest deductions that are passive.⁷ The math is fiddly, and misreporting passive income and loss is a familiar audit trigger for partnerships with related-party loans.

If the Loan Is Forgiven

Forgiveness converts the loan back into something taxable. When the partnership cancels the debt, the forgiven amount is treated as a distribution of money to the partner at the time of forgiveness, running through the usual distribution rules: tax-free up to outside basis, capital gain on anything above.²

In some situations the forgiveness is instead cancellation-of-indebtedness income, taxed as ordinary income. Exclusions can apply if the partner is insolvent or in bankruptcy, but the excluded amount comes with tax attribute reductions — net operating losses, credit carryovers, and asset basis all take hits to account for the income that escaped tax.⁸ Assuming a forgiven loan just disappears is one of the faster ways to invite IRS attention to the whole history of the arrangement.

How the Partnership Reports the Loan

The partnership carries the receivable on its balance sheet and reports it on Form 1065.⁹ Loans to partners appear on Schedule L, Line 7a, the line designated for loans to partners or persons related to partners.¹⁰

Interest income earned on the loan is ordinary income to the partnership and is allocated to every partner according to profit-sharing ratios, not just to the borrower. Each partner’s share shows up on their K-1. If the loan triggers imputed interest, the deemed interest income and any deemed transfers get reported on the K-1 the same way.⁹

The loan does not touch the borrowing partner’s capital account, because a debt isn’t a withdrawal of capital or profits. Book the advance as a draw against capital by mistake, and the partnership has effectively documented the transfer as a distribution, undermining loan treatment from the start.

Penalties for Getting the Classification Wrong

Misclassification isn’t just a paperwork problem. If it produces an underpayment of tax, the IRS can impose a 20% accuracy-related penalty on the underpayment. The penalty applies when the underpayment comes from negligence, disregard of the rules, or a substantial understatement of income tax. For individuals, an understatement is “substantial” when it exceeds the greater of $5,000 or 10% of the tax that should have been shown on the return.¹¹

The penalty can be avoided if the taxpayer shows reasonable cause and good faith. A formal loan agreement, an interest rate at or above the AFR, real repayments documented in the books, and consistent reporting all help. A large cash transfer with no note, no interest, and no repayment history does not.

Because partnership income flows through to every partner, a recharacterization that shifts the partnership’s reported income can ripple across every K-1, producing underpayments and penalties for partners who had nothing to do with the loan. Structuring the loan properly the first time is cheaper than defending it later.

1
Office of the Law Revision Counsel. 26 USC 707 – Transactions Between Partner and Partnership
2
Office of the Law Revision Counsel. 26 USC 731 – Extent of Recognition of Gain or Loss on Distribution
3
Internal Revenue Service. Applicable Federal Rates (AFRs) Rulings
4
Office of the Law Revision Counsel. 26 USC 7872 – Treatment of Loans With Below-Market Interest Rates
5
Office of the Law Revision Counsel. 26 USC 163 – Interest
6
eCFR. 26 CFR 1.752-1 – Treatment of Partnership Liabilities
7
eCFR. 26 CFR 1.469-7 – Treatment of Self-Charged Items of Interest Income and Deduction
8
Office of the Law Revision Counsel. 26 USC 108 – Income From Discharge of Indebtedness
9
Internal Revenue Service. About Form 1065, U.S. Return of Partnership Income
10
Internal Revenue Service. Instructions for Form 1065 (2025)
11
Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments