Can Therapists Write Off Unpaid Invoices: Cash vs Accrual Rules

Whether therapists can write off unpaid invoices depends entirely on how they keep their books. If you use cash-basis accounting, which most solo practitioners do, the answer is no: you never reported that fee as income, so there’s nothing to deduct.¹ If you use accrual-basis accounting, you can deduct the unpaid balance as a business bad debt, but only when you meet a set of documentation and timing rules the IRS enforces strictly.

Why Cash-Basis Therapists Can’t Deduct the Unpaid Fee

Most solo therapists and small group practices use the cash method. Income gets recorded when payment lands in your account. If a client owes you $200 for a session and never pays, that $200 was never on your tax return in the first place. The IRS rule is straightforward: you can only deduct a bad debt if the amount was previously included in your gross income.¹

This catches many therapists off guard. The instinct is that your time has value, so three unpaid sessions at $175 each should register as a $525 deductible loss. The tax code doesn’t see it that way. The value of your professional time is not a deductible bad debt. Only money you actually received, or were required to report under your accounting method, qualifies.

If you’re not sure which method you use, check your most recent Schedule C or ask your tax preparer. The method you chose when you first filed your business return is the one you’re locked into unless you get IRS approval to switch.

When Accrual-Basis Therapists Can Write Off the Invoice

Under accrual accounting, you recognize income when you earn it, regardless of when the client pays. A therapist on accrual basis records a $200 session fee as taxable revenue the day the session happens. If the client never pays, the therapist has already been taxed on money that never arrived. That’s exactly the situation a bad debt deduction is designed to correct.¹

Accrual accounting is uncommon among solo therapists because it adds bookkeeping complexity. Larger practices, those billing insurance heavily, or those following an accountant’s recommendation are the most likely to be on this method.

What the IRS Requires for the Deduction to Hold Up

Even accrual-basis therapists can’t simply cross an unpaid balance off the books. Four conditions have to line up.

The unpaid amount must have been reported as gross income on a current or prior year return.¹
A genuine debt must have existed. A signed service agreement or documented fee arrangement establishes this. Informal understandings with no written terms are harder to defend.
You must show reasonable collection efforts. The IRS doesn’t require a lawsuit, but you need evidence that you tried and that further attempts would be pointless.¹
The debt must be partially or wholly worthless in the tax year you claim it. Overdue is not the same as worthless; you need facts showing the client won’t pay.

You don’t have to file suit if you can demonstrate that a judgment would be uncollectible anyway. A client who filed for bankruptcy, moved without leaving contact information, or explicitly refused to pay all supply the kind of evidence the IRS looks for.¹

Business bad debts don’t have to be a total loss to qualify. If a client owed $800 and paid $300 before going silent, the remaining $500 can be deducted as a partially worthless business debt, provided you’ve charged off that specific amount on your books during the tax year.² Unpaid client invoices from your practice are business bad debts, so this partial option is available to you.

Documentation That Survives an Audit

An audit on a bad debt deduction comes down to your paper trail. Without solid records, the deduction disappears regardless of how legitimate the loss was.

Start with the service agreement. A signed contract or intake form that spells out your fee, payment schedule, and cancellation policy establishes that the client had a legal obligation to pay. Electronic signatures count. The IRS accepts typed names in signature blocks, digitized images of handwritten signatures, and signatures captured on electronic pads or touchscreens, as long as the signing process shows intent and the signed record is preserved in a tamper-resistant format.³

Keep every invoice you sent, showing the session date, the amount billed, and the due date. Practice management software that timestamps invoices automatically works well; a consistent spreadsheet works too.

Then document your collection efforts. This is the piece most therapists skip, and it’s the one the IRS cares about most. Useful evidence includes copies of demand letters or emails, ideally with proof of delivery like certified mail receipts or email read confirmations; phone logs with dates, times, and outcomes of follow-up calls; correspondence from any collection agency you used; and evidence of uncollectibility such as bankruptcy filings, mail returned as undeliverable, or a written refusal to pay.

Records supporting a bad debt deduction need to be kept longer than most tax records. The IRS gives itself seven years from the return’s due date to review a bad debt claim, and you have the same window to file for a refund if you missed the deduction the first time.⁴

How to Report It on Your Return

Sole proprietors report business bad debts on Schedule C of Form 1040. The deduction goes on Line 48 in Part V (Other Expenses), where you describe it as a bad debt and enter the uncollectible amount.⁵ That reduces your net business profit, which lowers both your income tax and your self-employment tax. Therapists operating as partnerships, S corporations, or other entity types report the deduction on their applicable business return.¹

Claim the deduction in the year the debt becomes worthless. You can’t stockpile unpaid invoices across several years and deduct them together in a high-income year. If you discover a debt actually went bad in a prior year, file an amended return using Form 1040-X for that year.⁶

If the Client Pays After You’ve Taken the Write-Off

Sometimes a client resurfaces and settles an old balance you already deducted. The tax code handles this through the tax benefit rule. If the original deduction reduced your tax liability, the recovered amount has to be included in your gross income for the year you receive the payment.⁷ Report it as business income on Schedule C in the year received.

What Cash-Basis Therapists Can Still Deduct

If you’re on the cash method and can’t deduct the unpaid fee itself, you may still have deductible out-of-pocket expenses tied to the session. Clinical assessment forms, printed workbooks, art therapy supplies, and other tangible materials you bought and used during a session that went unpaid are ordinary business expenses. Because you actually spent that money, cash-basis accounting already captured the cost, and those expenses are deductible on Schedule C in the year you paid for them regardless of whether the client ever paid you.

The distinction is narrow but real. The $175 session fee you never collected isn’t deductible. The $12 workbook you bought for that session is. Amounts like these add up across a year of no-shows and unpaid balances, so track material costs per session if you regularly use consumable supplies.

Your strongest financial protection as a cash-basis therapist is a clear cancellation and no-show policy enforced through upfront payment or a card on file. A no-show fee you actually collect is ordinary taxable income. A no-show fee you never collect is the same dead end as any other unpaid invoice under the cash method. The policy’s value is in deterrence and prompt collection, not in creating something deductible after the fact.

A Note on HIPAA When You Send Accounts to Collections

Pursuing an unpaid balance can require sharing client information with a third party, which raises confidentiality questions most businesses don’t face. HIPAA permits it. The Privacy Rule recognizes debt collection as a payment activity, so therapists can use collection agencies without violating HIPAA.⁸ Two conditions apply: you need a Business Associate Agreement with the agency before disclosing any protected health information, and you must share only the minimum necessary — typically the client’s name, contact information, dates of service, and amounts owed. Session notes and clinical detail stay out of the file you send.⁹

1
Internal Revenue Service. Topic No. 453, Bad Debt Deduction
2
Office of the Law Revision Counsel. 26 USC 166 – Bad Debts
3
Internal Revenue Service. IRS Electronic Signature (e-Signature) Program
4
Internal Revenue Service. How Long Should I Keep Records?
5
Internal Revenue Service. 2025 Instructions for Schedule C (Form 1040)
6
Internal Revenue Service. Time You Can Claim a Credit or Refund
7
eCFR. 26 CFR 1.111-1 – Recovery of Certain Items Previously Deducted or Credited
8
U.S. Department of Health and Human Services. Does the HIPAA Privacy Rule Prevent Health Care Providers From Using Debt Collection Agencies?
9
eCFR. 45 CFR 164.506 – Uses and Disclosures to Carry Out Treatment, Payment, or Health Care Operations