Mileage & Home-Office Deduction Calculator
Self-employed? Estimate your business mileage and home-office deductions using the 2025 IRS rates — and the tax they save.
Self-employed tax and expense tools
Learn moreTwo easy deductions
Two of the simplest deductions for the self-employed are business mileage (at the IRS standard rate) and the home office (via the simplified $5-per-square-foot method). Both require honest records, but neither needs you to track every actual expense.
How it’s calculated & sources
Mileage deduction = business miles × $0.70. Home-office deduction = square feet (capped at 300) × $5. Estimated tax savings applies your marginal rate to the total; self-employment tax savings can add more.
Source: IRS 2025 standard mileage rate ($0.70/mile) and the simplified home-office method ($5/sq ft, up to 300 sq ft).
Results update as you type and are general estimates, not personalized financial, tax, medical or legal advice. Verify with a professional.
Worked example
6,000 business miles ($4,200) plus a 150 sq-ft office ($750) is a $4,950 deduction — about $1,089 in tax savings at a 22% rate, more once self-employment tax is included.
Frequently asked questions
Can employees take these?
Generally no — the 2017 tax law suspended unreimbursed employee deductions through 2025. These mainly help the self-employed and small-business owners.
Standard mileage or actual expenses?
You can use whichever is larger, but if you want the standard rate you must choose it the first year the car is in service. Keep a mileage log either way.