Can Doctors Write Off Unpaid Bills as Bad Debt?

Doctors can write off unpaid patient bills as bad debt only if the practice keeps its books on the accrual method. Cash-basis practices, which is how most medical offices operate, cannot take the deduction, because the unpaid fee was never reported as income to begin with. There is nothing to reverse on the tax return, so the write-off is a bookkeeping event and nothing more.

The Accounting Method Decides Whether the Write-Off Saves You Tax

Under the cash method, income shows up on your return when payment arrives and expenses when you pay them. A patient who never pays never generated reportable income, so the IRS will not let you deduct the shortfall. The rule is direct: you cannot take a bad debt deduction for amounts you never included in gross income.¹

Under the accrual method, you report income when you earn it, regardless of when the patient pays.² The fee for a March procedure hits your gross income for that year even if the check never comes. Because you already paid tax on revenue you never collected, the IRS allows a deduction when the debt turns out to be uncollectible. The deduction reverses income you reported but never received.

Cash-basis practices have one narrow opening. If you paid money out of your own pocket on a patient’s behalf, for outside lab work or imaging, say, and the patient never reimbursed you, that cash outlay can be deductible as a bad debt.¹ The point is that real money left your account. Performing a service and going unpaid does not qualify.

Accrual-basis practices with chronic collection problems have another option. The nonaccrual-experience method lets you skip recording income you don’t expect to collect, based on your historical experience.³ The uncollectible portion never lands on the books, so no bad debt deduction is needed later. It requires solid records and IRS approval, but for high-volume practices it can beat writing off individual accounts.

What Counts as a Worthless Debt

Internal Revenue Code Section 166 allows a deduction for any debt that becomes worthless during the tax year, and a partial deduction when a debt can only be recovered in part.⁴ Worthlessness is a factual determination. Deciding you’re tired of chasing a patient is not enough. The IRS looks at all relevant circumstances, including the patient’s financial condition and whether any collateral secures the debt.⁵

Bankruptcy, a patient who moved with no forwarding address, or a patient who died without an estate makes for a straightforward case. A patient who simply stopped answering bills takes more work to document.

You do not have to sue to prove worthlessness. If a court judgment would itself be uncollectible, that is enough.⁵ Filing suit over a $200 balance would cost more than any recovery, and the IRS accepts that reality.

Documenting the Collection Effort

“Reasonable steps” to collect is the evidentiary backbone of the deduction.¹ Without a documented trail, expect the deduction to be disallowed if you’re audited. The IRS does not set a fixed timeline, but a systematic process over several months is the strongest posture.

A workable collection sequence for a medical practice runs roughly like this:

Multiple billing statements sent over 90 to 120 days after the balance becomes due, each showing the amount and service date.
A final demand letter after the billing cycle ends, sent by certified mail, stating that the balance will be written off and may be referred to collections.
Referral to a third-party collection agency when internal efforts fail. If a professional collector cannot recover the balance, the case for worthlessness gets much stronger.
A close-out letter or report from the agency confirming they were unable to collect.

Keep a file for each written-off account with the patient’s name, the date and amount of the original charge, copies of every statement, and any correspondence. Where a patient filed bankruptcy, a copy of the bankruptcy notification or court record is especially strong evidence, since discharge eliminates any reasonable expectation of payment.

Claiming the Deduction on Your Return

The IRS generally requires the specific charge-off method. You deduct each uncollectible amount individually in the year it becomes worthless, rather than building a general reserve for future losses.³

Totally Worthless Debts

When a debt is entirely uncollectible, you deduct the full amount, minus any portion you already deducted in an earlier year as partially worthless. You do not technically need to charge the debt off on your books to claim the deduction on a totally worthless debt, but it is good practice. If the IRS later concludes the debt was only partially worthless, your deduction is capped at what you actually charged off.³

Partially Worthless Debts

When you can collect some but not all of a balance (insurance pays 60%, the patient never covers the rest, for example), you can deduct the uncollectible portion, but only up to what you have actually charged off on your books that year.⁴ You can wait and take it in a later year. But once the debt turns totally worthless, you lose the ability to go back and claim partial deductions for the earlier years you skipped.

Where It Goes on the Return

The form depends on how the practice is organized:

Sole proprietorship or single-member LLC: Part V (Other Expenses) of Schedule C (Form 1040).⁶
Partnership or multi-member LLC: Line 12 (Bad debts) on Form 1065. The deduction reduces partnership income before it flows through to partners.⁷
S-corporation or C-corporation: Form 1120-S or Form 1120. For S-corps, the deduction passes through to shareholders on Schedule K-1.

Take the Deduction in the Right Year

The deduction belongs to the year the debt becomes worthless, not the year you first billed the patient, and not whenever you get around to cleaning up your books.⁴ You do not have to wait until an account is overdue to decide it is worthless. If you learn in October that a patient died with no estate, the debt is worthless in October, even if the invoice was not due until December.

The flip side matters more. If you let accounts age without evaluating them, you can miss the correct year entirely. A debt that became worthless in 2024 cannot be deducted on your 2026 return. An amended return may be an option if you catch the mistake, but the window is limited. For partially worthless debts the timing is more flexible: you can delay the charge-off to a later year, as long as the debt has not become totally worthless in the meantime.³

Do You Have to Send the Patient a 1099-C?

A common belief holds that writing off a patient balance triggers a Form 1099-C to the patient reporting the canceled amount as income. For nearly all medical practices, that is wrong. The 1099-C filing requirement applies only to “applicable entities” under Internal Revenue Code Section 6050P, which covers banks, credit unions, federal agencies, and organizations whose significant trade or business is lending money.⁸

A medical practice is in the business of providing healthcare, not lending money. The IRS instructions to Form 1099-C say directly that organizations whose principal business is selling nonfinancial goods or services, and who extend credit to customers in connection with those services, are not treated as having a significant trade or business of lending money.⁹ Letting patients pay over time is credit extended in connection with medical services, not lending as a trade. The regulation reinforces the point: seller financing of nonfinancial services is specifically excluded from the lending-of-money definition.¹⁰

If a collection agency that purchased the debt later cancels it, the 1099-C obligation, if any, sits with the agency, not the practice. The exception to watch for is a large in-house financing program that goes well beyond ordinary patient payment plans and becomes a regular, continuing part of operations. For an ordinary medical practice writing off ordinary patient balances, 1099-C filing is not required.

1
Internal Revenue Service. Topic No. 453, Bad Debt Deduction
2
Internal Revenue Service. Publication 538 – Accounting Periods and Methods
3
Internal Revenue Service. Publication 535 – Business Expenses
4
Office of the Law Revision Counsel. 26 USC 166 – Bad Debts
5
eCFR. 26 CFR 1.166-2 – Evidence of Worthlessness
6
Internal Revenue Service. Instructions for Schedule C (Form 1040)
7
Internal Revenue Service. Form 1065 – U.S. Return of Partnership Income
8
Office of the Law Revision Counsel. 26 USC 6050P – Returns Relating to Cancellation of Indebtedness
9
Internal Revenue Service. Instructions for Forms 1099-A and 1099-C
10
eCFR. 26 CFR 1.6050P-2 – Organization a Significant Trade or Business of Which Is the Lending of Money