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Bad Debt Expense: Formula, Journal Entries & Calculation Methods
Bad debt expense represents the estimated portion of accounts receivable that a company expects will never be collected. Learn the formulas, journal entries, and calculation methods — including the direct write-off method vs allowance method.
In This Article
What Is Bad Debt Expense?
Bad debt expense is the estimated dollar amount of accounts receivable that a business anticipates will be uncollectible during a given accounting period. It is reported as an operating expense on the income statement.
Any business that extends credit faces the risk that some receivables will never be paid. Bad debt expense captures that risk as a quantifiable line item. Properly recognizing it ensures financial statements reflect economic reality and comply with GAAP.
The corresponding balance sheet account — the allowance for doubtful accounts — is a contra-asset that reduces gross AR to its estimated net realizable value.
Bad Debt Expense Formula
Bad Debt Expense = Accounts Receivable × Estimated Uncollectible %
Example: $500,000 AR × 3% = $15,000 estimated bad debt expense.
The percentage of credit sales method is also common: Bad Debt Expense = Credit Sales × Estimated Uncollectible %. Both are GAAP-acceptable when applied consistently.
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Book a LedgerUp DemoDirect Write-Off Method vs Allowance Method
| Criteria | Direct Write-Off | Allowance Method |
|---|---|---|
| GAAP Compliance | Not compliant for financial reporting | Required for accrual-basis accounting |
| Timing | Expense recorded when account is deemed uncollectible | Expense estimated in the same period as revenue |
| Balance Sheet | AR overstated until write-off | Allowance reduces AR to net realizable value |
| Matching Principle | Violates — expense may hit a different period | Follows — expense aligned with revenue |
| Best For | Small businesses; IRS tax reporting | Any business needing GAAP-compliant statements |
Allowance Method: Step-by-Step
Percentage of Sales Example
Precision Manufacturing had $4,200,000 in credit sales in Q4. Historical data suggests 2.5% will go uncollected.
LedgerUp Insight: The workflow described above is one that LedgerUp automates end-to-end. Teams using LedgerUp typically cut manual effort by 80% and reduce errors across their billing pipeline.
Aging Method Example
Summit Advisory Group uses aging to estimate uncollectible accounts:
| Bucket | Amount | Est. % | Bad Debt |
|---|---|---|---|
| Current | $980,000 | 1% | $9,800 |
| 31–60 days | $420,000 | 4% | $16,800 |
| 61–90 days | $260,000 | 10% | $26,000 |
| 91–120 days | $120,000 | 25% | $30,000 |
| 120+ days | $70,000 | 50% | $35,000 |
| Total | $1,850,000 | — | $117,600 |
If the existing allowance is $42,000, the adjusting entry is $117,600 − $42,000 = $75,600.
Bad Debt Expense Journal Entries
1. Recording the Allowance
Credit: Allowance for Doubtful Accounts $75,600
2. Writing Off a Specific Account
Credit: Accounts Receivable — ABC Co. $12,400
This does not affect the income statement — the expense was already recognized when the allowance was established.
3. Recovering a Written-Off Account
Debit: Accounts Receivable — ABC Co. $12,400
Credit: Allowance for Doubtful Accounts $12,400
Step 2: Record the cash
Debit: Cash $12,400
Credit: Accounts Receivable — ABC Co. $12,400
Bad Debt Expense by Industry
| Industry | Typical Rate | Key Drivers |
|---|---|---|
| SaaS / Software | 1–2% | Recurring billing, credit card payments, service suspension |
| Manufacturing | 2–4% | Large orders, extended terms, customer concentration |
| Healthcare | 5–8% | Insurance denials, patient responsibility, regulatory complexity |
| Construction | 3–6% | Progress billing disputes, retainage, project delays |
| Wholesale | 1–3% | Established trade credit, repeat customers |
| Professional Services | 1–3% | Scope disputes, milestone billing |
How to Reduce Bad Debt Expense
1. Conduct Credit Checks
Use commercial credit bureaus (D&B, Experian Business) before extending Net 30+ terms. Set credit limits proportional to financial profile.
2. Establish Clear Payment Terms
Every invoice and contract should state the due date, payment methods, late fees, and escalation procedures.
3. Automate Collections
Automated reminders before and after due dates reduce DSO by 20–35% and correspondingly reduce write-offs.
4. Offer Early Payment Discounts
2/10 Net 30 accelerates cash flow and lowers the probability of uncollectible receivables.
5. Monitor AR Aging Weekly
Catch overdue accounts before they slip into the 60+ and 90+ day buckets where collection probability drops sharply.
LedgerUp helps reduce bad debt by automating the entire invoicing and collections lifecycle for B2B companies.
Frequently Asked Questions
How do you calculate bad debt expense?
Use either the percentage of receivables method (AR × estimated uncollectible %) or the aging method (apply different rates to each aging bucket and sum). Both are GAAP-acceptable.
What is the journal entry for bad debt expense?
Debit Bad Debt Expense, credit Allowance for Doubtful Accounts. When writing off a specific account: debit Allowance, credit Accounts Receivable.
Direct write-off vs allowance method?
The allowance method is GAAP-required for financial reporting (matches expense to revenue period). The direct write-off method is IRS-required for tax purposes.
Is bad debt expense tax deductible?
Yes, but the IRS requires the direct write-off method. You can only deduct when an account becomes wholly or partially worthless.
Does GAAP require the allowance method?
Yes, for companies with material receivable balances on accrual-basis statements. ASC 326 (CECL) further requires forward-looking credit loss estimates for public companies.
How can a company reduce bad debt?
Credit checks, clear payment terms, automated collections, early payment discounts, and weekly AR aging reviews.
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