The IRS lets you deduct vehicle costs one of two ways. The standard mileage method multiplies your business miles by a set rate (72.5 cents for 2026), which is simple and needs only a mileage log. The actual-expense method totals your real costs, gas, insurance, maintenance, depreciation, and applies your business-use percentage.
You cannot deduct personal driving, and commuting from home to a regular place of work is treated as personal. Business miles include trips to clients, between job sites, to pick up supplies, and, for gig drivers, time spent driving for hire.
If you use actual expenses, keep receipts. If you use the standard rate, keep a mileage log with the date, miles, and business purpose. Either way, you can also deduct business tolls and parking on top.

