How to Write Off Bad Debt Expense on Your Taxes

To write off a bad debt on your taxes, you have to show the debt was a real loan, prove it became worthless during the tax year, classify it as either a business or nonbusiness debt, and report it on the right form. The classification decides the size of your deduction. Business bad debts are ordinary deductions that reduce income dollar-for-dollar. Nonbusiness bad debts are treated as short-term capital losses, so after they offset any capital gains, only $3,000 a year comes off ordinary income.¹²

What Counts as a Bad Debt in the First Place

Two threshold conditions decide whether the IRS will even entertain the deduction.

First, a genuine debtor-creditor relationship has to exist, based on an enforceable obligation to repay a fixed sum. Gifts and contributions to a business’s capital don’t qualify, even when the parties call the transfer a loan.³ This trips up loans between family members most often. If you lent money to a relative with the understanding that repayment was optional, the IRS treats the transfer as a gift and denies the deduction when they don’t pay.⁴ The way to protect the deduction is to document the loan from day one: a written promissory note, a stated interest rate, a repayment schedule, and a record of any payments received. Loans between related parties get scrutinized heavily, and the burden of proving the arrangement was a real loan is on you.

Second, the debt must have a tax basis. For an accrual-basis taxpayer, that means the income the debt represents was already reported on a current or prior return.⁴ Cash-basis taxpayers generally can’t deduct an unpaid invoice, because they never picked the income up in the first place. A cash-basis taxpayer can still deduct a loan they actually funded with money, since the cash going out creates basis in the receivable.³

Proving the Debt Is Worthless

A debt becomes worthless when the facts show no reasonable expectation of repayment. That’s an objective test built on outside circumstances, not on how tired you are of chasing the borrower. You do have to take reasonable steps to collect before writing the debt off, but you don’t have to sue if you can show a judgment would go uncollected anyway.⁴

The kinds of evidence that hold up: the debtor’s bankruptcy filing showing the debt is unsecured and unrecoverable, a collection agency’s confirmation that the debt is uncollectible, correspondence establishing the debtor’s insolvency, or a sheriff’s return of execution unsatisfied after a court judgment. The debtor’s death combined with no recoverable estate assets also works.

Timing is where deductions get lost. You have to claim the write-off in the exact year the debt became worthless. Miss the year and you have to amend. The saving grace is the window: you get seven years from the due date of the return for the year the debt became worthless to file an amended return, more than double the normal three-year refund limit.⁵

Keep a file on every debt you write off. The original loan document or invoice, a log of collection attempts, correspondence with the debtor, and whatever outside evidence told you the debt was dead. This file is what survives an audit.

Business Bad Debts

A business bad debt is one created or acquired in connection with your trade or business. Unpaid customer receivables, loans to suppliers or employees made to protect a business relationship, and guarantees on business obligations all sit here. The test is whether your dominant motive in creating the debt was tied to business operations.¹

Business bad debts are ordinary deductions with no cap. A sole proprietor claims them on Schedule C. Corporations use Form 1120 and partnerships use Form 1065, both as ordinary deductions.⁴

If the debt is wholly worthless, the full amount comes off in the year it died. If it’s only partially worthless, business status gives you an option nonbusiness debts don’t have: you can deduct the portion you’ve written off while still expecting to collect the rest. Owed $50,000, expect to collect $20,000, you deduct the $30,000. The catch is that you must actually charge off the uncollectible portion on your books during the tax year you claim the deduction. A partial write-off that shows up only on the return, with nothing recorded in the accounting records, won’t survive review.¹

One accounting note. Your books may use the allowance method for bad debts under GAAP, setting aside an estimated reserve each period. The IRS doesn’t accept that for tax. You get the deduction only when you identify a particular debt as worthless and charge it off, which is the specific charge-off method.¹ Your book bad debt expense and your tax bad debt deduction will not match in most years. That’s expected, but track the difference.

Nonbusiness Bad Debts

Any debt not connected to your trade or business is nonbusiness. Personal loans to friends and relatives, loans to a corporation where you’re purely an investor, and debts from personal transactions all end up in this bucket.¹

The tax treatment is much tighter. A nonbusiness bad debt is a short-term capital loss regardless of how long you held it. That loss first offsets any capital gains for the year. Whatever is left deducts against ordinary income only up to $3,000 ($1,500 if married filing separately), with anything beyond that carrying forward to future years under the same annual limit.²⁶

Say you lent a friend $25,000 and they never paid. With no capital gains that year, you deduct $3,000 and carry the rest forward. It takes more than eight years to absorb the loss. The same $25,000 as a business bad debt would come off in year one.

A second restriction: nonbusiness bad debts are deductible only when wholly worthless. No partial write-offs. If there’s any reasonable chance of recovering something, you wait.¹

Report nonbusiness bad debts on Form 8949, Part I, line 1, as a short-term capital loss. The result flows to Schedule D of your Form 1040. Attach a statement covering the debtor’s name, any family or business relationship, the amount and due date, what you did to collect, and why you decided the debt was worthless. Missing that statement is an easy way to lose the deduction on audit.⁴

Loans You Guaranteed and Had to Pay

If you personally guaranteed someone else’s loan and had to pay when they defaulted, the payment can become a bad debt deduction. Whether it’s business or nonbusiness turns on your reason for signing the guarantee. A business owner who guarantees a loan to their own corporation is on the business side if their salary from the corporation exceeds their investment, and closer to the nonbusiness side if the investment substantially exceeds the salary.

Three conditions have to be met: you had a legal obligation to make the payment, the guarantee existed before the underlying debt became worthless, and you received reasonable consideration for entering the guarantee (which can be non-cash, like continued employment). If you have a right to recover from the borrower after paying, you can’t take the bad debt deduction until that recovery right itself becomes worthless.

Which Form to Use

Sole proprietor with a business bad debt: Schedule C (Form 1040), reducing business income directly.
Corporation or partnership with a business bad debt: Form 1120 or Form 1065, as an ordinary deduction.
Nonbusiness bad debt: Form 8949, Part I, line 1, flowing to Schedule D (Form 1040), with the required statement attached.

⁴

If you realize after filing that a debt actually died in a prior year, file Form 1040-X for that year. You have seven years from the due date of that year’s return, not the usual three.⁵

Whichever form you’re using, record the charge-off in your accounting records. The IRS expects the receivable to be reduced and the loss recognized on your books in the same year you claim the deduction.

If You Later Collect on a Debt You Wrote Off

Sometimes a debt you deducted comes back. A bankruptcy distribution beats expectations, a collector finds assets, the debtor’s finances turn around. When that happens, the tax benefit rule under IRC Section 111 controls.⁷

You pick the recovery up as income only to the extent the original deduction actually cut your tax. If the write-off saved you money, the recovery (up to the amount deducted) goes back into income in the year you receive it. If the original deduction gave you no tax benefit, say because you had no taxable income that year, the recovery isn’t income. Keep records from both the deduction year and the recovery year, because partial-benefit situations require the math from both.

1
Office of the Law Revision Counsel. 26 USC 166 – Bad Debts
2
Office of the Law Revision Counsel. 26 USC 1211 – Limitation on Capital Losses
3
eCFR. 26 CFR 1.166-1 – Bad Debts
4
Internal Revenue Service. Topic No. 453, Bad Debt Deduction
5
Office of the Law Revision Counsel. 26 U.S. Code 6511 – Limitations on Credit or Refund
6
Internal Revenue Service. Topic No. 409, Capital Gains and Losses
7
Office of the Law Revision Counsel. 26 U.S. Code 111 – Recovery of Tax Benefit Items