Is Bad Debt Expense a Debit or Credit?

Debit

Bad debt expense is a debit. Expenses increase with debits, so recognizing that a receivable will not be collected debits bad debt expense. Its normal balance is a debit, and for tax purposes the deduction generally comes only when a specific account is actually written off, not when an allowance is recorded.

Account category: Expense
Normal balance: Debit (Dr)
Increases with: Increase (Dr)
Decreases with: Decrease (Cr)
Financial statement: Income statement

Bad debt expense

Debit (Dr)

Increase (Dr)

Uncollectible recognized3,500.00

Credit (Cr)

Decrease (Cr)

Closed at year end3,500.00

The side that increases bad debt expense is shaded.

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Bad debt expense on a trial balance

A working trial balance extract. Totals tie, and the row this page is about is highlighted.
Acct #	Account	Debit	Credit
1000	Cash	48,200.00
1200	Accounts receivable	86,400.00
1300	Inventory	72,500.00
1500	Equipment, net of depreciation	82,000.00
2000	Accounts payable		31,500.00
2400	Notes payable		85,000.00
3900	Equity, beginning of year		172,600.00
4000	Sales revenue		550,000.00
4100	Sales returns and allowances	12,000.00
4200	Interest income		1,200.00
5000	Cost of goods sold	240,000.00
6000	Salaries and wages	96,000.00
6050	Officer compensation	60,000.00
6060	Payroll taxes	11,900.00
6100	Rent expense	36,000.00
6150	Insurance expense	14,400.00
6200	Utilities expense	9,600.00
6250	Advertising expense	7,200.00
6275	Meals	4,800.00
6300	Depreciation expense	19,000.00
6350	Amortization expense	4,000.00
6400	Bad debt expense (the account this page is about)	3,500.00
6450	Interest expense	6,800.00
6900	Other operating expenses	26,000.00
	Total	840,300.00	840,300.00

A working trial balance extract. Totals tie, and the row this page is about is highlighted.

Example journal entries

Recording a $3,500 allowance for estimated uncollectibles
Account	Debit	Credit
Bad debt expense	3,500.00
Allowance for doubtful accounts		3,500.00

Book expense. Not a tax deduction, because no specific account has been written off.

Writing off a specific $1,100 invoice under the allowance method
Account	Debit	Credit
Allowance for doubtful accounts	1,100.00
Accounts receivable		1,100.00

No expense now. The expense was taken when the allowance was set up.

Direct write off of a specific $1,100 invoice
Account	Debit	Credit
Bad debt expense	1,100.00
Accounts receivable		1,100.00

This is the version that supports the tax deduction.

Why it works that way

A receivable that will not be collected was never worth what the books said. Recognizing that reduces equity, which makes it an expense and therefore a debit.

Where the credit goes is the whole question, and it decides whether there is a deduction.

Allowance method versus direct write off

Under the allowance method, the credit goes to allowance for doubtful accounts, a contra asset. The expense is recognized on an estimate, before anyone knows which specific invoice will fail. This is what book accounting generally requires.

Under the direct write off method, the credit goes straight to accounts receivable when a specific account is identified as uncollectible. This is what tax generally requires.

So the two systems disagree by design, and the difference belongs on Schedule M-1. A company that books a $3,500 allowance and writes off $1,100 of specific accounts has a book expense of $3,500 and a tax deduction of $1,100.

The accrual condition most clients miss

A bad debt deduction requires that the income was recognized in the first place. An accrual basis taxpayer who recorded the sale and the receivable can deduct the loss when the receivable goes bad.

A cash basis taxpayer cannot. The income was never recognized, so there is nothing to deduct. Writing off an uncollected invoice on a cash basis return produces a deduction that does not exist, and it is a common error in service businesses that bill through software which records invoices as income on the books while the return is filed on cash.

What supports the deduction

Worthlessness has to be established, not assumed. Collection attempts, correspondence, a closed business, a bankruptcy notice, a judgment that cannot be satisfied: the file should show why the amount was treated as uncollectible in that specific year.

The year matters. A receivable that went bad three years ago is not deductible this year because somebody finally cleaned up the aging, which is why a long stale receivable needs a real conversation before it is written off.

Where it fits in the accounting equation

Assets

Liabilities

Equity

Expense sits on the equity side of the equation.

Tax return treatment

Where this account is reported on each business return
Form	Line
Form 1120	Page 1 line 15, bad debts, with the allowance movement as an M-1 adjustment
Form 1120S	Page 1 line 10, bad debts
Form 1065	Page 1 line 12, bad debts

Common questions

Is bad debt expense a debit or credit?

A debit. It is an expense. The credit goes either to the allowance for doubtful accounts, under the allowance method, or directly to accounts receivable, under the direct write off method.

Is an allowance for doubtful accounts tax deductible?

Generally not. Tax requires a specific account to be identified as worthless and written off. The book allowance and the tax write off therefore differ, and the difference belongs on Schedule M-1.

Can a cash basis business deduct bad debts?

No. A cash basis taxpayer never recognized the income, so there is no deduction for not collecting it. This is a common error where the books record invoices as income while the return is filed on cash.

What year is a bad debt deductible in?

The year the debt became worthless, supported by the facts: collection attempts, a closed business, a bankruptcy, an unsatisfiable judgment. Writing off an old receivable in the year somebody tidied the aging does not establish worthlessness in that year.