Yes — but only if you can prove it was a real loan, not a gift, and only in the year it becomes completely uncollectible. The unpaid family loan tax deduction that most people are looking for is called a nonbusiness bad debt deduction under IRC Section 166. It lets you write off the loan as a short-term capital loss on Form 8949, but the IRS sets a high bar: a written agreement, real collection efforts, and proof the debt is totally worthless, not just late.
Most family loans fail this test not because the lender did anything wrong, but because nobody documented the loan as a loan. The IRS starts every intrafamily case with a presumption: money that moves between relatives is a gift unless you can show otherwise. That single assumption is why so many people who lent $10,000 or $30,000 to a sibling or adult child get nothing back at tax time, even after losing the money for good.
This guide walks through exactly what the IRS looks for, a worked example with real numbers, how to file the claim, and the one alternative — forgiving the debt as a gift — that might actually serve you better.
Loan or Gift? Why the IRS Doesn't Take Your Word for It
Transfers between family members are presumed to be gifts unless you can prove a bona fide debt existed at the time of the transfer. That burden of proof sits entirely on you, the lender. Courts and IRS auditors look at the same handful of facts every time, drawn from cases like Perry v. Commissioner (92 T.C. 470) and Caligiuri v. Commissioner (549 F.2d 1155):
- A signed promissory note with a specific principal, interest rate, and maturity date
- Interest at or above the Applicable Federal Rate in effect when you made the loan
- A fixed repayment schedule, not "whenever you can"
- Actual payments received, even partial ones, before things went wrong
- A real demand for repayment once payments stopped
- The borrower's solvency at the time of the loan — advances to someone already insolvent are treated as gifts, since you couldn't have reasonably expected repayment
None of these alone is decisive. In VHC, Inc. (T.C. Memo. 2017-220), the Tax Court denied a bad debt deduction despite a signed promissory note with a fixed maturity date, because the lender never enforced repayment and kept advancing money after the borrower defaulted. Paperwork gets you in the door; behaving like an actual creditor is what keeps you there.
| Signals the IRS reads as a loan | Signals the IRS reads as a gift |
|---|---|
| Promissory note with interest and maturity date | No documentation, "pay me back whenever" |
| Interest at or above the AFR | 0% interest with no note |
| Demand letters, collection calls, a payment plan offer | No follow-up after payments stop |
| Payments actually made and recorded | Money advanced to someone already unable to repay |
| Lender treats missed payments as default | Lender keeps advancing new money after default |
If your loan was informal and undocumented from day one, don't panic — but be realistic. Retroactively drafting a note now won't fix a five-year-old handshake loan. What you can control going forward is documenting every new loan properly; our promissory note guide and Applicable Federal Rate explainer cover exactly what that paperwork needs to say.
The "Totally Worthless" Test You Have to Clear
Even a well-documented loan only becomes deductible once it's totally worthless — not mostly unpaid, not probably never coming back, but entirely uncollectible with no reasonable expectation of any further repayment. The IRS does not allow a partial bad debt deduction for a nonbusiness loan the way it does for business debts.
Worthlessness is a facts-and-circumstances call, established by things like:
- The borrower's bankruptcy filing
- Confirmed insolvency (more debts than assets, no income to garnish)
- A documented, failed collection effort (you don't need to sue if a judgment would be uncollectible anyway)
- The borrower's disappearance or refusal to respond after repeated contact
You claim the deduction in the specific tax year worthlessness is established — not the year you lent the money, and not the year you gave up hope. Get that year wrong and the IRS can deny the deduction outright, so timing this correctly matters as much as the paperwork itself.
A Worked Example: How the Deduction Actually Plays Out
In 2023, Maria lent her brother Danny $18,000 to launch a food truck, backed by a signed promissory note charging 5.5% interest — above the AFR at the time — with payments starting three months later. Danny made six payments totaling $2,400 before the business collapsed in 2025. He filed Chapter 7 bankruptcy that November, listing Maria as an unsecured creditor. The bankruptcy trustee confirmed no assets remained for unsecured creditors.
Maria's remaining basis in the loan was $15,600 ($18,000 principal minus $2,400 in principal-and-interest payments received, tracked in her loan ledger). Because the bankruptcy filing and trustee's report established worthlessness in 2025, that's the year she claims the loss — not 2023 when she made the loan, and not 2024 when payments first stopped.
The $15,600 becomes a short-term capital loss. It first offsets any capital gains Maria has that year. If a loss remains after that, she can deduct up to $3,000 against ordinary income ($1,500 if married filing separately) for 2025, and carry forward whatever's left to future tax years until it's used up.
How to Actually Claim It: Form 8949 and the Statement the IRS Wants
- Report the loss on Form 8949, Part I, line 1, as a short-term capital loss (nonbusiness bad debts don't get long-term treatment regardless of how long the loan was outstanding).
- Enter the debtor's name and "bad debt statement attached" in the description column, your basis in column (e), and zero as proceeds in column (d).
- Attach a detailed statement to your return that documents:
- A description of the debt, the amount, and when it became due
- The debtor's name and your family relationship to them
- The collection efforts you made
- Why and when you determined the debt was worthless
Keep the promissory note, payment history, demand letters, and any bankruptcy or court records with your tax file. If the IRS questions the deduction, this is what substantiates it — not your recollection of what happened.
The 7-Year Window Most People Don't Know About
The normal deadline to amend a prior return and claim a refund is three years. Bad debt deductions get a special exception: you have seven years from the original filing deadline to amend a return and claim a bad debt loss, under IRC Section 6511(d). That window exists because worthlessness is often disputed after the fact — the IRS may later argue the debt actually went bad in an earlier year than you claimed, and this rule protects you from losing the deduction entirely if that happens.
Practically, this means if you're only realizing now that a loan from a few years ago is truly gone, you may still be able to go back and claim it — as long as you're inside that seven-year window and can establish which year worthlessness actually occurred.
The Alternative: Forgiving the Loan as a Gift Instead
Sometimes the cleanest move isn't to chase a bad debt deduction — it's to formally forgive the loan and treat it as a gift. There's no bad-debt paperwork, no worthlessness test, and no waiting for a bankruptcy filing. The trade-off: you get no deduction, and if the forgiven amount exceeds the annual gift tax exclusion — $19,000 per recipient in 2026, or $38,000 for a married couple splitting gifts — you'll need to file Form 709. It won't trigger actual gift tax for most families, since it just counts against your lifetime exemption ($15 million per individual in 2026), but the filing requirement still applies. Our annual gift tax exclusion guide covers exactly how that math works.
Bad-Debt Deduction vs. Loan Forgiveness: Which Fits Your Situation
| Bad Debt Deduction | Loan Forgiveness (Gift) | |
|---|---|---|
| Tax result for lender | Short-term capital loss, up to $3,000/year against ordinary income | No deduction |
| Filing requirement | Form 8949 + detailed statement | Form 709 if over the annual exclusion |
| Proof required | Bona fide loan, collection efforts, total worthlessness | None — you can forgive a gift-labeled transfer freely |
| Best when | The loan was genuinely documented and pursued, and the money is truly gone | The loan was informal, or you'd rather close the chapter than fight for a deduction |
| Timing | Must claim in the specific year worthlessness is established | Can forgive at any time you choose |
If your loan was never properly documented, forgiveness is usually the more realistic path — trying to force an undocumented handshake loan through the bad debt rules rarely survives IRS scrutiny.
Mistakes That Kill the Deduction
- Continuing to advance money after a default. This was fatal in the VHC case — it signals you never really expected repayment.
- Claiming the loss in the wrong year. Worthlessness has to be pinned to a specific year with evidence, not a vague sense that "it's probably not coming back."
- No interest, no note, no schedule. Without these, the IRS has little reason to see the transfer as anything but a gift from the start.
- Trying to deduct a partial loss. Nonbusiness bad debts require total worthlessness — you can't deduct the unpaid half of a loan that's still partly being repaid.
- Skipping the collection effort. You don't have to sue a broke relative, but you do need to show you tried — a certified demand letter and a documented response (or silence) go a long way.
Prevent This Next Time
The families who successfully claim this deduction almost always did one thing differently from the start: they treated the loan like a loan. A signed note, an interest rate at or above the AFR, a real payment schedule, and a running record of what's been paid — that's the difference between a deductible bad debt and an expensive lesson.
If you're setting up a new family loan, create a free loan agreement with proper terms from day one, and log every payment as it happens rather than trying to reconstruct history later. If a loan is already going sideways, read our guide on what to do when a family member isn't paying you back before you decide whether collection, forgiveness, or a bad debt claim is the right move.
This article is general information, not tax or legal advice. Bad debt deductions are fact-specific and often contested by the IRS — talk to a CPA or tax attorney before claiming one, especially if the amount is significant.
