Short answer: The allowance for doubtful accounts is a contra-asset account that estimates the portion of your accounts receivable you expect not to collect. Bad debt expense is the income-statement cost of that estimate. You record them together: debit bad debt expense and credit the allowance. The allowance carries a normal credit balance and reduces receivables on the balance sheet to their net realizable value, the amount you actually expect to collect.
Last updated: July 2026.
Not every invoice gets paid. Under US accounting rules, you are not allowed to wait until a specific customer defaults to recognize that reality. You have to estimate uncollectible amounts in the same period you record the sale, so your financial statements show what you truly expect to collect. The allowance for doubtful accounts and bad debt expense are the two accounts that make that happen, and understanding how they move is essential for anyone who owns the accounts receivable process.
What is the allowance for doubtful accounts?
The allowance for doubtful accounts, sometimes called the allowance for bad debts or the provision for doubtful debts, is an estimate of the receivables you expect will never be collected. It is a contra-asset account, meaning it sits against accounts receivable and reduces it. If you have 500,000 dollars in gross receivables and a 20,000 dollar allowance, your balance sheet reports 480,000 dollars of net receivables. That net figure is the net realizable value, the amount you genuinely expect to turn into cash.
Is the allowance for doubtful accounts a debit or credit?
The allowance for doubtful accounts has a normal credit balance. Because it is a contra-asset, it works opposite to the accounts receivable it offsets: receivables carry a normal debit balance, so the allowance that reduces them carries a credit balance. You increase the allowance with a credit and decrease it with a debit. This is the point people most often get backwards, so it is worth anchoring: more expected losses means a larger credit balance in the allowance.
What is bad debt expense?
Bad debt expense is the amount you record on the income statement to reflect receivables you expect not to collect. It is an operating expense, and it is the cost side of building or topping up the allowance. When you decide the allowance needs to be larger, the increase flows through bad debt expense and reduces your net income for the period. In short, the allowance lives on the balance sheet and bad debt expense lives on the income statement, and a single journal entry connects them.
What are the journal entries?
Three entries cover almost every situation, all under the allowance method:
| Event | Debit | Credit |
|---|---|---|
| Record or increase the estimate | Bad debt expense | Allowance for doubtful accounts |
| Write off a specific bad account | Allowance for doubtful accounts | Accounts receivable |
| Recover an account previously written off | Accounts receivable, then Cash | Allowance, then Accounts receivable |
The key thing to notice: writing off a specific customer does not touch bad debt expense. That is because you already recognized the expense when you built the allowance. The write-off simply removes a now-worthless receivable and draws down the allowance you set aside for it, with no new hit to the income statement. If a customer later pays after being written off, you reverse the write-off to put the receivable back, then record the cash normally.
Allowance method vs direct write-off method
There are two ways to account for bad debt. The direct write-off method waits until a specific invoice is known to be uncollectible, then debits bad debt expense and credits receivables directly. It is simple, and the IRS generally requires it for tax purposes, but it is not allowed under US GAAP for financial reporting because it violates the matching principle: it records the loss in a later period than the sale that created it. The allowance method estimates losses in the same period as the sale, which is why GAAP requires it. The practical result is that many businesses keep both, the allowance method for their financial statements and the direct write-off method for their tax return.
How do you estimate the allowance?
There are two common estimation approaches:
- Percentage of sales (income statement approach). Apply a historical bad-debt rate to credit sales for the period. If 1.5 percent of credit sales typically goes bad and you sold 800,000 dollars on credit, you record 12,000 dollars of bad debt expense. It is simple and ties the expense to sales, but it does not check whether the allowance balance still makes sense.
- Aging of receivables (balance sheet approach). Apply rising uncollectible rates to each bucket of your accounts receivable aging report, then adjust the allowance to that target balance. This is more accurate because it grounds the estimate in the actual age and risk of what you are owed, which is why most finance teams prefer it.
With the aging approach, remember you are adjusting the allowance to a target, not adding to it. If the aging says the allowance should be 20,000 dollars and it already holds 8,000 dollars, you record 12,000 dollars of bad debt expense to bring it up to target.
Allowance for doubtful accounts vs allowance for credit losses
You may see the newer term allowance for credit losses. Under the current expected credit losses standard, known as CECL, US companies estimate lifetime expected losses on receivables rather than waiting for losses to become probable. In practice, for ordinary trade receivables the mechanics look much like the aging approach above, and many small and midsize businesses use the terms allowance for doubtful accounts and allowance for credit losses interchangeably. The shift under CECL is mostly about being forward-looking with the estimate, not about changing the journal entries.
Why this matters beyond the ledger
A growing allowance and rising bad debt expense are not just accounting entries. They are a signal that something upstream in billing and collections is slipping, the same slippage that shows up in a rising days sales outstanding. The cheapest bad debt is the one you never create, through credit screening at onboarding, accurate invoices, and structured follow-up before balances drift into the oldest aging buckets. The allowance measures the risk; the receivables process is where you actually reduce it.