IRC §166 Business Bad Debt Deduction
Turn uncollectible business receivables and business loans into tax deductions with properly documented demand letters
The Demand Letter as Tax Documentation
When a business customer or business borrower owes your business money and won't pay, a demand letter serves two purposes simultaneously:
- Collection effort: Creates legal pressure to pay, and it works more often than you'd expect
- IRS documentation: If the debtor can't or won't pay, the demand letter becomes evidence supporting an IRC §166 bad debt deduction on your tax return
The IRS specifically requires evidence of collection efforts before allowing a bad debt deduction. An attorney-drafted demand letter with certified mail receipt is the gold standard documentation.
IRC §166 Requirements
| Requirement | What the IRS Needs | How I Document It |
|---|---|---|
| Bona fide debt | Genuine debtor-creditor relationship | Demand letter references the note/agreement/invoice terms |
| Basis in the debt | You actually loaned or earned the money | Attach bank records, promissory note, or invoices |
| Debt became worthless | Debtor can't pay; collection is futile | Worthlessness assessment memo after demand fails |
| Collection efforts | Proof you tried to collect | Demand letters + certified mail receipts + response log |
| Year of worthlessness | Deduction in the correct tax year | CPA coordination on timing |
Business vs. Nonbusiness Bad Debt
- Created or acquired in your trade or business
- Deductible as ordinary loss
- Partial deduction allowed
- Can reduce ordinary income dollar-for-dollar
- Examples: client invoices, vendor advances, business loans
- Not created in your trade or business
- Treated as short-term capital loss
- Must be totally worthless (no partial)
- Subject to $3,000/year limit vs. ordinary income
- Examples: personal loans that are not made in a trade or business, some investment losses
My IRC §166 Documentation Package
When I'm engaged to prepare tax documentation for an uncollectible business debt, the package I deliver to your CPA includes:
- Formal Demand Letter: An attorney demand to the business debtor with certified mail receipt, establishing the collection effort timeline
- Collection Effort Chronology: Dated summary of all collection attempts (calls, emails, letters, meetings)
- Debtor Financial Assessment: Documentation of debtor's inability to pay, bankruptcy filings, dissolved entity records, asset search results, or debtor's own financial disclosures
- Worthlessness Determination Memo: Attorney analysis explaining why further collection is futile
- Debt Classification Analysis: Business vs. nonbusiness determination with supporting reasoning
- IRS Documentation Statement: The specific statement required by Reg. §1.166-2 for attachment to the tax return, including:
- Description of the debt and amount
- Date debt became due/worthless
- Debtor's name and relationship
- Efforts made to collect
- Why debt is deemed worthless
How Tax Recovery Works (Example)
Uncollectible debt: $50,000 unpaid business receivable or business loan
Tax treatment as a business bad debt: Ordinary loss
If taxpayer is in the 32% bracket:
- Full $50,000 ordinary deduction → $16,000 tax savings in year 1
- Partial worthlessness may be deductible for a business bad debt
For comparison, if the same amount were a nonbusiness bad debt: short-term capital loss, limited to $3,000 a year against ordinary income, with the rest carried forward
Fees
This work follows the attorney demand engagement below, starting at $2,500, with the final scope confirmed in writing before any work begins.
Want me to write it and send it?
I take a dispute like the one on this page and write the demand myself, on my letterhead, then handle delivery and read the response you get back.
Request the attorney demand engagement, starting at $2,500After a conflict check, I draft the demand on my letterhead, prepare the supporting chronology and damages figure, send it by certified mail and email, and review the first substantive response. Sergei Tokmakov, California Bar #279869.
Need Business Bad Debt Documentation?
Send me the invoice or note and the collection history for the business debt, and I will tell you what the documentation record needs.
Email owner@terms.law