TL;DR

A write-off can mean two things: writing off a bad debt (removing an uncollectable invoice from your books) or writing off a business expense (deducting it from your taxable income). Both reduce what you owe financially, just in different ways.

Key Points

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Writing off an uncollectable invoice removes it from [[accounts-receivable]] and may generate a tax deduction for bad debt

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Writing off a business expense means deducting it from taxable income — the terms 'write-off' and 'tax deduction' are often used interchangeably

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Bad debt deductions are only available under [[accrual-accounting]] — cash basis businesses simply never recorded the income

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Common expense write-offs: equipment, software, professional development, office supplies, travel, and home office

Writing Off Uncollectable Invoices

If a client refuses to pay and collection efforts have failed, you may write off the invoice as a bad debt. Under Accrual Accounting, you previously recorded this as revenue and Accounts Receivable when the invoice was issued. Writing it off removes it from AR and creates a bad debt expense, which reduces your taxable income. Under Cash Basis Accounting, there's nothing to write off — you never recorded the income, so it simply never appears on your taxes. Document your collection efforts before writing off a debt: sending final notices, making calls, and potentially issuing a Late Payment Letter establishes that the debt is genuinely uncollectable¹.

Writing Off Business Expenses

When people say 'I can write that off,' they typically mean deducting a Business Expense from taxable income. Writing off a $1,000 laptop means deducting it on your tax return, reducing your taxable income by $1,000. If your marginal tax rate is 32%, that saves you $320 in taxes — not $1,000. The write-off doesn't make the purchase free; it makes it tax-advantaged². To write off a business expense, it must be ordinary and necessary for your business, and you must have documentation. Common write-offs for freelancers include software, equipment, professional development, home office, and business travel.

Writing Off vs. Depreciation

Not all assets can be written off fully in the year of purchase. Large assets like expensive equipment or vehicles may need to be depreciated over their useful lives. However, IRS Section 179 allows most small businesses to write off the full cost of qualifying equipment immediately in the year of purchase — up to a generous annual limit. Bonus depreciation allows 100% first-year expensing of certain new assets. These accelerated write-offs are powerful for reducing taxable income in years when you make significant equipment investments. Your accountant can advise on which method maximizes your tax benefit for each specific asset.

References

IRS — Deducting Business Expenses ↗

irs.gov

IRS — Business Taxes for Self-Employed Individuals ↗

irs.gov

Last updated: June 9, 2026

Related Terms

Tax Deduction

A business or personal expense that can be subtracted from gross income to reduce the total taxable income, thereby lowering the amount of tax owed.

Business Expense

A cost incurred in the ordinary course of running a business that may be deductible from taxable income, reducing the total tax owed.

Accounts Receivable

Money owed to a business by its customers for goods or services that have been delivered but not yet paid for.

Depreciation

The systematic allocation of the cost of a tangible asset over its useful life, reflecting the gradual decline in the asset's value through use, age, or obsolescence.

Accrual Accounting

An accounting method in which revenue is recorded when it is earned and expenses are recorded when they are incurred, regardless of when cash is actually received or paid.

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