A bad debt write-off journal entry takes one of two forms. If you use the direct write-off method, you post a single entry: debit Bad Debt Expense and credit Accounts Receivable for the uncollectible balance. If you use the allowance method, the write-off itself is a debit to Allowance for Doubtful Accounts and a credit to Accounts Receivable, with the expense having already been recorded in an earlier estimation entry that debited Bad Debt Expense and credited the Allowance. Which pattern you use depends on whether you’re keeping books under GAAP or writing off the debt for a very small business or for tax purposes.
The Direct Write-Off Entry
The direct write-off method records the loss only when you confirm a specific customer won’t pay. There is one entry, and it hits the income statement immediately.
Say a customer owes $4,000 and files for bankruptcy on October 15:
- Debit: Bad Debt Expense — $4,000
- Credit: Accounts Receivable (Customer Name) — $4,000
Net income drops by $4,000 in the current period and the customer’s receivable balance goes to zero. The trade-off is a timing mismatch. If you booked the sale last year and the customer defaults this year, the expense lands a full year after the revenue it relates to. That violates the matching principle, which is why GAAP does not permit the direct write-off method on audited financial statements. It remains common among very small businesses, and it’s effectively what the IRS requires for tax purposes.
The Allowance Method Entries
The allowance method splits the work into two entries that happen at different times. The first estimates future losses in the same period you record the related credit sales. The second writes off a specific account once you confirm it’s uncollectible.
Step One: The Estimation Entry
At period-end, you estimate how much of your outstanding receivables won’t be collected and post an adjusting entry. If your December 31 estimate calls for $15,000 in expected losses:
- Debit: Bad Debt Expense — $15,000
- Credit: Allowance for Doubtful Accounts — $15,000
This entry doesn’t touch Accounts Receivable. It builds a reserve on the balance sheet, sitting as a contra-asset that reduces gross receivables to their net realizable value.
Step Two: Writing Off a Specific Account
When a specific customer’s balance is confirmed uncollectible, you draw against that reserve. Suppose a customer’s $1,800 balance goes bad on March 15:
- Debit: Allowance for Doubtful Accounts — $1,800
- Credit: Accounts Receivable (Customer Name) — $1,800
This entry does not touch Bad Debt Expense and does not affect net income. The expense was already recognized in the earlier estimation entry. Gross receivables drop by $1,800, the allowance drops by $1,800, and net receivables are unchanged. The write-off is a balance-sheet reclassification, nothing more.
Estimating the Allowance Balance
The two common estimation techniques start from different places and treat the existing allowance balance differently, which changes the size of your adjusting entry.
The percentage-of-sales approach applies a flat rate to net credit sales for the period. If your historical loss rate is 1% and you generated $500,000 in net credit sales, you record $5,000 in bad debt expense. The current allowance balance doesn’t enter the calculation because this method focuses on matching expense to current-period revenue. It’s quick, but the reserve can drift from reality over time.
The aging-of-receivables approach starts from the balance sheet. You sort outstanding receivables into buckets by how long they’ve been overdue and apply escalating loss percentages to each. A typical pattern:
- Current (not yet due): 1–2% estimated loss
- 1–30 days past due: 3–5%
- 31–60 days past due: 10–15%
- 61–90 days past due: 25–35%
- Over 90 days past due: 50% or higher
The total across all buckets is the target balance for the Allowance for Doubtful Accounts. You then adjust for whatever balance is already sitting there. If aging says you need $8,000 in the allowance and there’s already a $1,000 credit balance, your adjusting entry is $7,000, not $8,000. Auditors tend to prefer aging because it looks directly at the composition of the receivables.
Recording a Recovery After Write-Off
Sometimes a customer pays on an account you’ve already written off. The standard practice is two entries: reverse the write-off first, then record the cash. Reinstating the receivable before collecting keeps the customer’s payment history intact in the subsidiary ledger.
Under the allowance method, suppose you recover $750 from a previously written-off account. First, reverse the write-off:
- Debit: Accounts Receivable (Customer Name) — $750
- Credit: Allowance for Doubtful Accounts — $750
Then record the cash:
- Debit: Cash — $750
- Credit: Accounts Receivable (Customer Name) — $750
The net effect is more cash and a replenished allowance. Bad Debt Expense is never touched.
Under the direct write-off method, the reversal credits Bad Debt Expense directly because there’s no allowance account. If $2,500 of an earlier $4,000 write-off is recovered:
- Debit: Accounts Receivable (Customer Name) — $2,500
- Credit: Bad Debt Expense — $2,500
Then the cash entry:
- Debit: Cash — $2,500
- Credit: Accounts Receivable (Customer Name) — $2,500
If only part of the original balance comes back, use the recovered amount for both entries and leave the rest written off.
When Write-Offs Exceed the Allowance
If actual write-offs during the period outpace the reserve, the allowance account flips to a debit balance. The write-offs still post, but at period-end your adjusting entry has to cover the deficit and build the new target balance on top of it.
Suppose your aging schedule says you need a $10,000 credit balance in the allowance, but write-offs during the year have left it with a $2,000 debit balance. Your adjusting entry is $12,000: $2,000 to erase the deficit plus $10,000 to establish the target reserve. A debit balance that keeps reappearing usually means your loss percentages are too low or your aging buckets aren’t granular enough.
Tax vs. Book Treatment
The IRS does not accept the allowance method. Congress repealed the reserve method for most taxpayers in 1986, so the deduction is only available in the year a specific debt becomes worthless.1Office of the Law Revision Counsel. 26 USC 166 Bad Debts If you use the allowance method for financial reporting, expect a timing difference: the GAAP expense hits when you estimate, and the tax deduction comes later when you charge off the specific account.
Business bad debts can be deducted in full or in part; partial worthlessness counts, so you can deduct the uncollectible portion in the year you charge it off.1Office of the Law Revision Counsel. 26 USC 166 Bad Debts The IRS expects you to show reasonable collection efforts and to take the deduction in the year the debt becomes worthless. A court judgment isn’t strictly required, but you need to demonstrate that a judgment would have been uncollectible or that other collection efforts failed.2Internal Revenue Service. Topic No. 453 Bad Debt Deduction
Documentation Behind the Entry
The journal entry itself is straightforward. What auditors look for is the file behind it. For each account written off, keep the original invoice or agreement, a record of collection attempts (demand letters, emails, phone logs), and the reason you concluded the debt was uncollectible. A bankruptcy notice, if there is one, closes the loop.
For the allowance estimate, document the method used, the data inputs, and any adjustments made for changing economic conditions. If actual write-offs run consistently above or below your estimates, recalibrate before an auditor asks why you haven’t.