Is gas for my car tax deductible?

Schedule C, line 9 (Car and truck expenses), under the actual expense method.

Using actual expenses, you deduct the business-use percentage of gas along with your other car costs.

Using the standard mileage rate, you can’t also deduct gas, oil, or maintenance. You’d be counting them twice.

Gas for a vehicle used only for your business, like a delivery van, follows the same two-method rule.

Gas receipts and your mileage log, which you need either way to show the business percentage.