Why the deduction applies
If you're a fitness model earning income from brand deals, sponsored content, affiliate links, or in-person appearances, the IRS treats you as running a business, and business driving is deductible. That includes trips to photo shoots, gym locations you film at, brand events, meetings with agents or managers, and drives to pick up gear or products you review. Commuting from your home to a gym you personally train at for non-content reasons generally does not count, but driving there specifically to film sponsored content does.
The deduction goes on Schedule C as part of your business expenses, which reduces your net profit and, in turn, the self-employment tax you calculate on Schedule SE.
Two ways to calculate the write-off
You have two methods, and you pick one per vehicle for the life of that car in most cases.
Standard mileage rate: Track the business miles you drive and multiply by the IRS standard mileage rate for the current year. This rate is published annually and adjusts for fuel and maintenance costs. This method is simpler and works well if you don't want to track every gas and repair receipt.
Actual expense method: Add up your real costs, gas, insurance, repairs, lease payments or depreciation, registration, and car washes, then multiply by your business-use percentage. If you drive the car 40% of the time for work, you deduct 40% of those costs. Depreciation on a purchased vehicle is reported using Form 4562. This method takes more recordkeeping but can produce a bigger deduction if you drive an expensive or gas-heavy vehicle.
You cannot switch back and forth freely between methods for the same car once you've used actual expenses with certain depreciation methods, so choose based on which fits your driving pattern and record-keeping habits.
What counts as business use
Business miles include:
- Driving to a studio, gym, or outdoor location to film content
- Meeting brands, PR reps, or photographers
- Picking up or returning gifted products, merch inventory, or equipment
- Traveling to fitness competitions or expos where you're representing your brand
- Trips to a co-working space or office if that's where you edit and manage your business
Purely personal errands, workouts you don't film or monetize, and your regular commute to a day job don't qualify.
Keeping proof the IRS accepts
The biggest reason car write-offs get denied in an audit is missing documentation, not the deduction itself. Keep a mileage log with the date, destination, purpose, and miles driven for each business trip. A simple spreadsheet or a mileage tracking app works fine, as long as you log trips close to when they happen rather than reconstructing them at tax time.
If you use the actual expense method, save receipts for gas, repairs, insurance, and any loan or lease statements. Also record your total annual mileage (business and personal combined) since your business-use percentage depends on that ratio.
A car write-off is one of the most commonly flagged deductions, so accurate, contemporaneous records matter more here than almost anywhere else in your return.