Is It Normal to Use the Standard Mileage Rate Instead of Tracking Actual Gas and Repair Costs?
Somewhere between the delivery app, the side gig, and the reselling business, a car becomes a business tool, and the receipts pile up fast. Then someone mentions a mileage rate that seems to skip all that record-keeping entirely, which raises the question of whether that’s actually allowed.
The short answer
Yes, it’s a standard and widely used method. The IRS offers a standard mileage rate that lets someone deduct a set amount per business mile driven, instead of tracking and deducting the actual cost of gas, maintenance, insurance, and depreciation separately. Both methods are legitimate, and which one results in a bigger deduction depends on the specific vehicle, how it’s used, and how detailed someone is willing to be with recordkeeping.
How the two methods actually differ
The standard mileage method multiplies a per-mile rate, set annually, by the number of business miles driven during the year, and that single calculation covers gas, wear and tear, and most other vehicle-related costs in one number. The actual expense method instead totals up every real cost — fuel, repairs, insurance, registration fees, depreciation — and then applies the percentage of the vehicle’s use that was for business to that total. Actual expenses generally require more detailed recordkeeping throughout the year, since every relevant receipt needs to be kept and categorized, while the mileage method mainly requires an accurate log of miles driven and the business purpose of each trip.
Why so many people default to the mileage rate
For a lot of gig work, delivery driving, or a reselling side hustle that involves regular local trips, the standard mileage rate is popular simply because it’s less to track. A mileage log — noting the date, purpose, and distance of a business trip — is generally easier to maintain consistently than a full folder of vehicle-related receipts. It also removes some guesswork, since the deduction is a straightforward multiplication rather than a calculation involving depreciation schedules, which can get complicated on their own.
When the actual expense method might result in a bigger deduction
A newer or more expensive vehicle, or one with unusually high maintenance or insurance costs, can sometimes produce a larger deduction under the actual expense method, since it captures the real cost of ownership rather than an averaged rate. This is more likely to matter for someone whose vehicle-related costs are genuinely higher than typical, rather than for someone driving an older, lower-cost car with modest expenses. There are also rules that affect whether someone can switch between methods in later years depending on which one was used first, which is part of why it’s worth thinking through the choice rather than treating it as a purely mechanical decision each year.
Recordkeeping either way
Even for the mileage method, a contemporaneous log is generally expected — meaning miles and trip purposes noted around the time they happened, not reconstructed later from memory. This matters just as much as keeping receipts for a reselling business, since a deduction without adequate documentation can be disallowed if it’s ever questioned. Understanding how long to keep this kind of documentation connects to the broader guidance on how long to keep tax records, and for anyone new to estimated payments as a side income grows, it’s worth reviewing why quarterly estimated taxes become relevant at a certain income level, since vehicle deductions factor into that same overall calculation.
What to weigh
- How much record-keeping effort feels manageable. The mileage method trades some potential deduction size for significantly less ongoing tracking.
- The actual cost profile of the vehicle. A car with high real expenses may favor the actual expense method; a lower-cost, reliable vehicle often favors mileage.
- Consistency requirements. Switching between methods isn’t always freely available in later years, which makes the first year’s choice worth thinking through.
Putting it in perspective
Using the standard mileage rate instead of tracking every gas and repair receipt is a completely normal and common choice, not a shortcut that skips real recordkeeping requirements. It simplifies the process considerably but still requires an accurate log of business miles, and whether it beats the actual expense method in dollar terms depends on the specific vehicle and how it’s used.