Quick Answer: Bad debt expense represents accounts receivable that a company does not expect to collect. Under US GAAP, the allowance method is required for most businesses: you estimate uncollectible amounts and record an allowance for doubtful accounts before knowing which specific customers will default. Under the direct write-off method, you expense the bad debt only when a specific account is identified as uncollectible — this method is permitted only when bad debts are immaterial.
What Is Bad Debt Expense?
When a business sells on credit, some customers inevitably fail to pay. Bad debt expense is the cost a company recognizes when it determines that all or part of an accounts receivable balance is uncollectible. Properly accounting for bad debts is essential for accurate financial statements — overstating receivables inflates assets and income, while understating them makes the company appear less profitable than it is.
There are two methods for recording bad debt expense: the allowance method (required under GAAP for material amounts) and the direct write-off method (permitted only when bad debts are immaterial). Each method produces different journal entries and has different implications for financial reporting.
The Allowance Method (GAAP-Preferred)
The allowance method follows the matching principle by recording bad debt expense in the same period as the related credit sales. You estimate the expected uncollectible amount and create a contra-asset account — Allowance for Doubtful Accounts — to reduce net accounts receivable to its expected realizable value.
Step 1: Estimating Bad Debt Expense
There are two common approaches to estimating the allowance:
- Income statement approach (percentage of sales): Multiply credit sales by a historical bad debt percentage. This method focuses on the expense amount and income statement matching.
- Balance sheet approach (aging of receivables): Categorize receivables by how long they have been outstanding and apply increasing percentages to older balances. This method focuses on the net realizable value of receivables.
Step 2: Recording the Allowance
Once you have estimated the bad debt expense, record the adjusting entry at period end:
Adjusting entry to record estimated bad debt expense:
Dr. Bad Debt Expense $5,000
Cr. Allowance for Doubtful Accounts $5,000
This entry increases expenses on the income statement and creates (or adds to) the allowance contra-asset on the balance sheet. Net accounts receivable equals gross receivables minus the allowance balance.
Step 3: Writing Off a Specific Account
When you identify a specific customer account as uncollectible, remove both the receivable and the corresponding allowance:
Write-off of specific uncollectible account ($1,200):
Dr. Allowance for Doubtful Accounts $1,200
Cr. Accounts Receivable $1,200
Notice that the write-off does not affect the income statement. The expense was already recognized when you recorded the allowance. Net accounts receivable also stays the same because both gross receivables and the allowance decrease by the same amount.
Step 4: Recovery of a Previously Written-Off Account
If a customer later pays on an account you already wrote off, reverse the write-off and then record the cash receipt:
Reverse the write-off:
Dr. Accounts Receivable $1,200
Cr. Allowance for Doubtful Accounts $1,200
Record the cash collection:
Dr. Cash $1,200
Cr. Accounts Receivable $1,200
Aging of Receivables Example
The aging method is the most widely used approach for estimating the allowance. Here is a sample aging schedule:
| Aging Category | Amount | Estimated Uncollectible % | Allowance Required |
|---|---|---|---|
| 0–30 days | $120,000 | 1% | $1,200 |
| 31–60 days | $45,000 | 3% | $1,350 |
| 61–90 days | $18,000 | 10% | $1,800 |
| Over 90 days | $7,000 | 30% | $2,100 |
| Total | $190,000 | $6,450 |
If the current Allowance for Doubtful Accounts balance is $2,000 (credit), you need an additional $4,450 to reach the required $6,450:
Dr. Bad Debt Expense $4,450
Cr. Allowance for Doubtful Accounts $4,450
If the allowance already has a debit balance (e.g., from excess write-offs), you must add that debit balance to the required allowance to determine the adjusting entry amount.
The Direct Write-Off Method
Under the direct write-off method, you do not estimate uncollectibles in advance. Instead, you expense the bad debt only when you determine a specific account is uncollectible:
Direct write-off of uncollectible account ($2,500):
Dr. Bad Debt Expense $2,500
Cr. Accounts Receivable $2,500
Why the Direct Write-Off Method Is Generally Not Acceptable
- Violates the matching principle: The expense may be recorded in a different period than the revenue it relates to
- Overstates assets: Accounts receivable includes amounts that will never be collected until the write-off occurs
- GAAP non-compliance: ASC 310 (receivables) requires the allowance method for material amounts
The direct write-off method is acceptable only when bad debts are immaterial, or for tax reporting purposes where the IRS permits it (IRC Section 166).
Key Differences: Allowance vs Direct Write-Off
| Feature | Allowance Method | Direct Write-Off Method |
|---|---|---|
| Timing of expense | Period of sale (estimated) | When account is identified as uncollectible |
| Balance sheet impact | Net realizable value reported | Receivables overstated until write-off |
| GAAP compliance | Required for material amounts | Only acceptable if immaterial |
| Contra-asset account | Allowance for Doubtful Accounts | None |
| Matching principle | Follows it | Violates it |
Tax Reporting for Bad Debts
For tax purposes, the IRS generally requires the direct write-off method under IRC Section 166. You can deduct a bad debt only when it becomes wholly or partially worthless. The specific write-off must be documented — you cannot deduct estimated bad debts. Non-business bad debts are treated as short-term capital losses, subject to the capital loss limitations.
Best Practices for Managing Bad Debts
- Review the aging report monthly: Identify past-due accounts early so you can pursue collections before accounts become uncollectible
- Update your estimated uncollectible percentages annually: Historical loss rates change with economic conditions and customer mix
- Document write-offs thoroughly: Maintain records of collection attempts, customer correspondence, and the basis for determining an account is uncollectible
- Separate the allowance calculation from write-offs: The allowance is an estimate; write-offs are specific — do not net them
- Consider a reserve policy: Set a consistent threshold (e.g., write off accounts over 180 days past due with no payment plan) to reduce subjectivity
