Bad Debt Write-Off: When to Do It, How to Record It, and What the IRS Requires

For any B2B business extending net terms to customers, bad debt is an operational reality, not an edge case. Knowing exactly when to write it off, how to record it, and what the IRS requires can protect your financial statements and recover tax value from an otherwise total loss.

Quick answer: Write off a bad debt when the customer is unreachable, has shown no willingness to set up a payment plan, and the invoice has been unpaid for more than 90 days. Use the allowance method for GAAP financial reporting and the direct write-off method for IRS tax deductions.

Key Takeaways

• Write off bad debt when it is 90 to 180 days past due and all collection attempts have failed
• Use the allowance method for GAAP-compliant financial reporting; use the direct write-off method for IRS tax deductions
• The journal entry under the direct write-off method: Debit Bad Debt Expense / Credit Accounts Receivable
• Document every collection attempt before claiming the IRS deduction; you must prove the debt is worthless
• Write off sooner when collection costs exceed the debt value
• Resolve Pay's non-recourse net terms financing eliminates bad debt exposure entirely: if a buyer defaults on an approved invoice, you keep the advance

What Is Bad Debt?

Bad debt is an accounts receivable balance that a business has determined is uncollectible. It arises when a customer who purchased goods or services on credit fails to pay, due to bankruptcy, business closure, or refusal to pay, and all reasonable collection efforts have been exhausted. In accounting, bad debt is removed from accounts receivable and recorded as a bad debt expense on the income statement.

A bad debt write-off is the accounting action of removing that uncollectible receivable from your books. It converts the outstanding invoice from an asset (accounts receivable) to an expense (bad debt expense), reducing both your AR balance and your taxable income. The write-off does not mean you have forgiven the debt; you can still pursue collection, but it reflects the economic reality that payment is unlikely.

Bad debt is sometimes called a "doubtful debt" or "uncollectible account." The distinction matters: a doubtful debt is one you suspect may not be paid but have not confirmed yet, while a bad debt is one you have determined is truly unrecoverable. This difference affects how and when you record the expense in your books. If your business extends net terms to customers, understanding this distinction is essential for keeping your cash flow healthy and your financial statements accurate.

When Should a Business Write Off a Bad Debt?

Any business that has accounts receivable will, at some point, face the risk of an uncollectible debt. The same applies to businesses that offer net terms.

There is no single universal answer. Businesses vary in their operations and apply different internal criteria.

Keeping bad debt in AR increases AR and days sales outstanding (DSO), which can skew balance sheet and working capital reports. That is not always a bad thing: visibility into outstanding bad debt can motivate continued collection efforts. But at some point, the average collection period becomes too long to justify carrying the balance.

Bad debt can also trigger policy changes that improve your B2B credit management process. If you can move a customer to a payment plan, it makes sense to keep the debt on the books as AR until it is paid in full.

The general rule: write off a bad debt when the customer is unreachable, has shown no willingness to set up a payment plan, and the invoice has been unpaid for more than 90 days. Most businesses set an internal threshold between 90 and 180 days past due. The key factors are your company's average DSO, the cost of carrying the debt, and whether any collection efforts are still active.

Signs It Is Time to Write Off a Bad Debt

Use this checklist to evaluate whether a specific debt is ready for write-off:

1. The customer is unresponsive. Multiple invoices, reminders, emails, and phone calls have gone unanswered for 60 to 90 days or more. Consistent lack of communication is one of the strongest indicators that payment is not coming.

2. The customer has filed for bankruptcy. In Chapter 7 cases especially, unsecured trade creditors are typically last in line for any distribution of assets. The full amount may be unrecoverable.

3. The customer's business has closed. When a customer shuts down operations or dissolves their business entity, recovery odds drop significantly. Verify by checking state business registrations or using an automated credit check tool.

4. The debt has exceeded your internal aging threshold. Most companies set a policy at 90, 120, or 180 days past due. If the invoice has crossed that threshold and all collection attempts have failed, write it off.

5. The customer disputes the debt and refuses to negotiate. If there is an unresolvable dispute and the customer refuses to compromise, legal action may cost more than the debt itself.

6. The cost to collect exceeds the debt amount. Collection agencies typically charge 25% to 50% of the recovered amount. If the outstanding balance is small relative to collection costs, the effort is not worth the return.

7. Your collection agency has returned the account. When a professional collection agency returns the account as uncollectible, all reasonable avenues have been exhausted.

Bad Debt Write-Off Timeline: A Practical Reference

Note: Thresholds vary by company policy, average DSO, and industry. Adjust to your internal credit policy.

How to Write Off Bad Debt: Step-by-Step

Step 1: Identify the invoice as past due using your AR aging report. Pull your aging schedule and flag any invoice that has crossed your internal threshold (typically 90 days past due). Your aging report is the trigger for every subsequent step.

Step 2: Exhaust internal collection attempts. Send reminders at 30, 60, and 90 days. Use your AR automation software that generates aging reports automatically to run these sequences without manual intervention. Document every outreach attempt: date, method, and outcome.

Step 3: Escalate to a collection agency or send a final demand letter. If internal efforts fail, refer the account to a collection agency or your agentic collections platform. Log the escalation date and the agency's case reference number.

Step 4: Determine the debt is uncollectible. Apply the 7-sign checklist above. If the agency returns the account, the customer is unreachable, or the cost to collect exceeds the balance, the debt qualifies for write-off.

Step 5: Record the journal entry. Choose the appropriate method: allowance or direct write-off (see the next section for full journal entry details). Record the entry in the period the debt is confirmed uncollectible.

Step 6: Document the write-off for IRS purposes. Compile the original invoice, all payment history, and every collection attempt. File the deduction in the tax year the debt becomes worthless. Consult IRS Topic No. 453 for the specific requirements.

Writing Off Bad Debt: Allowance Method or Direct Write-Off Method

There are two key methods for writing off bad debt. Regardless of which you use, you will need a journal entry that balances the bad debt entry.

1. The Allowance Method

The allowance method estimates future bad debts at the end of each accounting period and records them as a reserve before any specific debt is confirmed uncollectible. It is the GAAP-required method for financial reporting.

The bad debt amount is recorded in an "allowance for doubtful accounts," a contra-asset account that offsets accounts receivable on the balance sheet, reducing total AR to a more realistic figure.

Step 1: Estimate and record the allowance

• Debit: Bad Debt Expense (income statement)
• Credit: Allowance for Doubtful Accounts (balance sheet, contra-asset)

Step 2: When a specific debt is confirmed uncollectible

• Debit: Allowance for Doubtful Accounts
• Credit: Accounts Receivable

Example: Your company has $500,000 in total accounts receivable at year-end. Based on your history and AR management best practices, you estimate that 3% ($15,000) will be uncollectible. You debit Bad Debt Expense for $15,000 and credit Allowance for Doubtful Accounts for $15,000. Later, when Customer X's $2,000 invoice is confirmed uncollectible, you debit the Allowance for $2,000 and credit Accounts Receivable for $2,000, with no additional impact on your income statement.

The allowance method follows the matching principle: expenses are recorded in the same period as the revenue they relate to. This gives a more accurate picture of profitability in any given period.

2. The Direct Write-Off Method

The direct write-off method records bad debt expense only when a specific invoice is confirmed uncollectible. It is simpler than the allowance method but does not comply with GAAP. The IRS requires it for tax deduction purposes.

The journal entry is straightforward:

• Debit: Bad Debt Expense
• Credit: Accounts Receivable

Example: Customer Y owes $5,000. After months of collection efforts, you have determined they will never pay. You debit Bad Debt Expense for $5,000 and credit Accounts Receivable for $5,000. There is no intermediate account; the debt moves directly from AR to an expense.

While the direct write-off method is easy to implement, it does not comply with GAAP's matching principle. Revenue from the sale might have been recorded in Q1, but the bad debt expense might not be recognized until Q3 or Q4, making your financial statements less accurate in both periods. The IRS, however, requires businesses to use the direct write-off method (also called the specific charge-off method) for calculating tax deductions on bad debts.

Allowance Method vs. Direct Write-Off: Side-by-Side Comparison

Many businesses use both methods: the allowance method for financial reporting (to stay GAAP-compliant) and the direct write-off method for their tax returns (as required by the IRS). If you are unsure which method is right for your business, consult with your accountant or credit management team.

Can You Write Off a Partial Bad Debt?

Yes. The IRS allows partial write-offs under the direct write-off method. You can deduct only the portion you have charged off on your books in the year it becomes partially worthless.

Under the allowance method, partial write-offs are handled through the allowance reserve: you reduce the reserve by the uncollectible portion rather than writing off the entire balance.

Example: A customer owes $10,000. After a bankruptcy settlement, the court confirms that $6,000 is unrecoverable while the remaining $4,000 is still being pursued. You write off $6,000 against your allowance reserve and continue carrying the $4,000 as an active receivable. When you file your tax return, you deduct the $6,000 as a partial bad debt in the year the partial worthlessness was confirmed.

Partial write-offs require the same documentation as full write-offs: original invoice, payment history, and evidence of collection efforts. Consult IRS Topic No. 453 for the specific rules on partial worthlessness.

When to Decide That a Bad Debt Is Uncollectible

No matter how bad debt is tracked, there must come a point when it is determined the debt is ultimately uncollectible and must be written off.

Before you write off the debt, you will need to demonstrate to the IRS that you have taken sufficient steps to collect it, because bad debts lower your business's taxable income.

Note: Recording a bad debt expense is only required if you use accrual accounting. If you use cash accounting, you will not have an entry for the collectible amount because you never received payment. It still creates a cash flow problem, but there is no AR entry to reverse.

Once your internal credit collection policy has run its course, the next step is typically hiring a collection agency or deploying debt collection software or B2B collections software to automate follow-up.

If you need to track debts that have been removed from primary AR, create a sub-ledger account. This keeps your main AR balance clean while preserving visibility into each collection account.

Understanding AR Aging and Bad Debt Decisions

An accounts receivable aging schedule is one of the most important tools for deciding when to write off bad debt. It categorizes outstanding invoices into time-based buckets showing how long each invoice has been unpaid:

• Current (0 to 30 days)
• 31 to 60 days past due
• 61 to 90 days past due
• 90+ days past due

The older a receivable, the less likely it is to be collected. This is why many companies use their aging report to trigger specific actions at each stage: reminders at 30 days, escalation to a collections team at 60 days, and evaluation for write-off at 90 or 120 days.

If you are using the allowance method, your aging report is also how you estimate your bad debt reserve. For example:

• 1% of current receivables (0 to 30 days)
• 5% of receivables in the 31 to 60 day bucket
• 15% of receivables in the 61 to 90 day bucket
• 30% or more of receivables over 90 days

These percentages should be calibrated to your own historical collection data and adjusted as economic conditions change.

Using DSO Averages as a Write-Off Benchmark

To keep DSO from being skewed by uncollectible balances, many businesses write off bad debt after a set number of days tied to their average DSO.

Example: If your company's average DSO is 75 days, you might decide that after an additional 90 to 120 days of failed collection efforts, the debt should be written off. That puts your write-off threshold at roughly 165 to 195 days from the original invoice date.

Some companies pay internal carrying costs on outstanding bad debt. Rather than waiting 165 to 195 days, they may settle on 150 days to limit that carrying expense.

Bad debts appear on your general ledger and are listed on your income statement under "selling, general, and administrative costs" (SG&A). They directly reduce net income, so if you are carrying too many outstanding accounts, review your financial obligations and credit policy accordingly.

How to Calculate Bad Debt Expense

There are two main methods for estimating bad debt expense: the percentage of sales method and the percentage of receivables method. Both are used with the allowance method to determine how much to set aside in your bad debt reserve.

Method 1: Percentage of Sales

The percentage of sales method estimates bad debt as a percentage of total credit sales for the period.

Formula: Bad Debt Expense = Total Credit Sales x Estimated Bad Debt Percentage

Example: Your company made $800,000 in credit sales this quarter. Based on three years of data, an average of 2% of credit sales have gone uncollected.

$800,000 x 0.02 = $16,000

You debit Bad Debt Expense for $16,000 and credit Allowance for Doubtful Accounts for $16,000.

To calculate your historical bad debt percentage:

Percentage of Bad Debt = Total Bad Debts / Total Credit Sales

If your company had $30,000 in confirmed bad debts last year on $1,500,000 in credit sales: $30,000 / $1,500,000 = 2%.

Method 2: Percentage of Receivables (Aging Method)

The percentage of receivables method focuses on the balance sheet. You look at total outstanding accounts receivable and use your aging schedule to estimate how much will not be collected.

Formula: Required Allowance Balance = Total Accounts Receivable x Estimated Uncollectible Percentage

Example: Your company has $400,000 in outstanding receivables.

You need $20,750 in your Allowance for Doubtful Accounts. If the allowance already has a $5,000 balance from the prior period, you record a Bad Debt Expense of $15,750 ($20,750 minus $5,000) to bring the allowance to the required amount.

Startups and small businesses should set up a bad debt allowance account before issuing credit. If you already have bad debts, calculate your current bad debt percentage and set up an allowance you can draw from. Using invoice automation makes this process more efficient by generating aging reports in real time.

Bad Debt Benchmarks by Industry

Bad debt ratios vary significantly by B2B vertical. Distributors and wholesalers extending Net 60 or Net 90 terms typically carry higher exposure than businesses operating on Net 30. Companies with high customer concentration, where one or two buyers represent a large share of AR, face amplified risk if a single account goes delinquent.

Your internal bad debt ratio (Total Bad Debts / Total Credit Sales) is the most reliable benchmark for your business. Industry averages are a starting point, not a target. If your ratio is consistently above 2%, it is a signal that your credit risk management process needs strengthening, or that you should consider shifting credit risk off your balance sheet entirely.

When the Cost to Collect Outweighs the Debt

If a customer has closed their business or becomes unresponsive, collecting the debt becomes more time-consuming and expensive. The cost, both in money and time, must be weighed against the amount being collected.

Even if you win a civil judgment against a customer, you still have to take action to collect payment, often through garnishment. And if the customer files for bankruptcy or has no assets, the debt may be unrecoverable regardless of the judgment.

Collection agencies typically charge 25% to 50% of the recovered amount. For smaller balances, legal fees for civil suits can quickly outpace the value of the debt. When that math does not work, write it off.

How to Handle Unexpected Payments

Sometimes a customer pays a debt you have already written off. That money is real and must be accounted for.

If you used the direct write-off method, recovering a previously written-off debt requires two journal entries. First, reverse the original write-off by debiting Accounts Receivable and crediting Bad Debt Expense (or a Bad Debt Recovery account). Then record the cash receipt by debiting Cash and crediting Accounts Receivable.

If you used the allowance method, the recovery is similar but the credit in the first entry goes to the Allowance for Doubtful Accounts instead of Bad Debt Expense. You debit Accounts Receivable and credit the Allowance, then debit Cash and credit Accounts Receivable.

Either way, the recovered funds must be properly documented in your books.

Bad Debt Tax Deductions: What the IRS Requires

One of the benefits of writing off bad debt is the potential tax deduction. The IRS has specific requirements you must meet before claiming it.

For business bad debts, the IRS allows you to deduct the debt in full or in part, but only if the amount owed was previously included in your gross income. For businesses using accrual accounting, this typically means the revenue from the sale was already reported on a prior tax return. Cash-basis taxpayers can only claim a deduction if the income was previously included in gross income; if payment was never reported as income, you cannot deduct it as bad debt.

To claim the deduction, you must demonstrate the debt is legitimately worthless. Document every collection attempt: phone calls, emails, letters, and any correspondence with collection agencies. You do not necessarily need to file a lawsuit, but you should be able to show that a court judgment would be uncollectible.

Business bad debts are deducted on Schedule C (Form 1040) for sole proprietors, or on the applicable business tax return for other entity types. The deduction must be taken in the year the debt becomes worthless. For partial worthlessness, deduct only the portion you have charged off on your books.

For detailed guidance, consult IRS Topic No. 453 or your tax advisor. Maintain records of the original sale, all invoices, payment history, and every collection attempt. This paper trail protects your deduction in the event of an audit.

How to Avoid Bad Debts

The most effective way to eliminate bad debt exposure is to stop carrying the credit risk yourself.

Resolve Pay offers non-recourse financing on approved invoices. Resolve assumes the credit risk on every approved invoice. If a buyer defaults, you keep the advance. That is not accounts receivables insurance or accounts receivables collections software. It is a structural shift in who bears the risk.

Here is how it works: Resolve's business credit check engine evaluates your buyers using only their company name, email, and address, with no impact on their credit score. When a customer is approved, Resolve advances up to 100% of each invoice into your account within 1 business day. Your customer pays Resolve on Net 30, 60, or 90 terms. You never wait on payment, and you never absorb a default.

Too often, sales teams rely on intuition when recommending net terms, without knowing how to read an Experian Credit report or assess buyer risk. With Resolve, every credit decision is backed by AI-driven underwriting. The result: a healthy AR balance, zero uncollectible accounts, and no need to expand your finance team to manage the risk.

Learn how to offer net terms online and eliminate bad debt exposure with Resolve's accounts receivable automation platform.

Frequently Asked Questions About Bad Debt Write-Offs

What is the journal entry for writing off bad debt?

Under the direct write-off method: Debit Bad Debt Expense and credit Accounts Receivable for the full amount. Under the allowance method: Debit the Allowance for Doubtful Accounts and credit Accounts Receivable when the specific debt is confirmed uncollectible. The allowance method is required under GAAP; the direct write-off method is used for tax purposes.

What is the journal entry for bad debt write-off under the allowance method?

Debit the Allowance for Doubtful Accounts and credit Accounts Receivable for the amount of the uncollectible invoice. This entry reduces both the allowance reserve and the AR balance without creating a new expense; the expense was recorded when you originally estimated the allowance.

Is bad debt write-off the same as debt forgiveness?

No. Writing off a bad debt is an internal accounting action; it removes the receivable from your books to reflect that collection is unlikely. It does not legally forgive the debt. You can still pursue collection after a write-off, and if you collect, you record it as a bad debt recovery.

Can you write off bad debt on your taxes?

Yes. If your business uses accrual accounting and you previously reported the revenue as income, you can deduct the bad debt on your tax return. The IRS requires the specific charge-off (direct write-off) method for tax deductions. Take the deduction in the year the debt becomes wholly or partially worthless, and document all collection efforts.

How long should I wait before writing off a bad debt?

Most businesses set an internal threshold between 90 and 180 days past due. The key factors are your company's average DSO, the cost of carrying the debt, and whether collection efforts are still active. Have a consistent policy documented in your credit management guidelines.

What is the difference between bad debt and doubtful debt?

A doubtful debt is a receivable you suspect may not be collected; it is still uncertain. A bad debt is a receivable confirmed as uncollectible and ready to be written off. Under the allowance method, you estimate doubtful debts as a reserve. Once a specific debt is determined uncollectible, it transitions from doubtful to bad and is written off against that reserve.

What happens when you collect on a debt that was already written off?

This is called a bad debt recovery. Reverse the original write-off entry, then record the cash received. Under the direct write-off method, reinstate the receivable by crediting Bad Debt Recovery and then record the payment. Under the allowance method, credit the Allowance for Doubtful Accounts to reinstate the receivable, then record the cash.

What is a bad debt ratio, and what is considered normal?

The bad debt ratio measures the percentage of your credit sales that end up uncollectible: Total Bad Debts / Total Credit Sales. Many B2B companies target a ratio below 1 to 2%. If your ratio is consistently above this range, your credit risk assessment process may need strengthening, or you should consider shifting credit risk to a net terms partner like Resolve Pay.

How can B2B businesses prevent bad debt?

Prevention starts with strong credit policies. Run automated credit checks on every new customer before extending net terms. Set credit limits based on the customer's financial health. Monitor your AR process flows closely and follow up on overdue invoices quickly. For the most robust protection, work with a net terms financing partner that assumes the credit risk on your behalf.

Does writing off bad debt affect my credit score?

Writing off bad debt in your accounting books does not directly affect your business credit score; it is an internal accounting action. However, if the customer who owes you is reported to a business credit bureau as delinquent, it can affect their credit score. Significant bad debt write-offs that impact your financial ratios, like your working capital ratio, may also affect how lenders view your creditworthiness when you apply for financing.