Choose between standard mileage rate and actual expenses for business vehicle deductions. Covers the IRS mileage rate, method lock-in rules, mileage log requirements, commuting rules, luxury auto limits, and heavy vehicle exceptions. Trigger on "mileage deduction", "standard mileage rate", "vehicle expenses", "car deduction", "business miles", "mileage tracking".
Choose and apply the right method for deducting business vehicle expenses: standard mileage rate or actual expenses.
Multiply your business miles by the IRS standard rate. Simple.
2024 rate: 67 cents per mile (this changes annually — check IRS.gov for the current year).
What the rate includes: gas, oil, repairs, tires, insurance, registration, depreciation. You do NOT deduct these separately when using the standard mileage rate — they're baked into the 67¢.
What you CAN add on top: parking fees and tolls for business trips (deducted on Schedule C Line 24a Travel), and interest on a car loan (Line 16b).
When you can use it:
Track every dollar spent on the vehicle, then multiply by your business-use percentage.
Deductible actual expenses:
Business-use percentage: Total business miles ÷ total miles driven during the year. If you drove 15,000 miles total and 10,000 were for business, your business-use % is 66.7%. Apply this to all actual expenses.
This is the most important rule and the one most people get wrong:
| First-year choice | Can switch to standard mileage later? | Can switch to actual later? |
|---|---|---|
| Standard mileage | N/A | Yes, but depreciation limited to straight-line |
| Actual expenses | No — locked out of standard mileage for this vehicle permanently | N/A |
| Section 179 or bonus depreciation claimed | No — locked out permanently | N/A |
Best practice: Start every new vehicle on the standard mileage rate. This preserves your option to switch to actual later if circumstances change (e.g., repair costs spike). Going the other direction — actual to standard — is not allowed.
Deductible:
NOT deductible — ever:
The home office exception: If your home office qualifies as your principal place of business (passes the exclusive-use test), then trips from home to any business destination are deductible — not commuting. This is a significant benefit that effectively makes your first and last trip of the day deductible.
The IRS requires "adequate records" or "sufficient evidence" to support your vehicle deduction. In practice, this means a contemporaneous log:
What to record for each trip:
| Field | Example |
|---|---|
| Date | 2026-03-15 |
| Destination | Acme Corp office, 123 Main St |
| Business purpose | Client meeting to review Q1 financials |
| Miles driven | 28.4 |
"Contemporaneous" means: Recorded at or near the time of the trip. An IRS auditor will reject a mileage log created at year-end from memory. Apps like MileIQ, Everlance, or TripLog record trips automatically via GPS.
Annual totals needed: Total miles driven for the year, total business miles, total commuting miles, total other personal miles. These go on Form 4562 Part V.
Sampling method: The IRS allows you to keep a detailed log for a representative period (e.g., 3 months) and extrapolate, provided your driving patterns are consistent. But a full-year log is always stronger evidence.
If you own a passenger automobile (under 6,000 lbs GVWR) and use the actual expense method, your annual depreciation deduction is capped:
2024 limits (with bonus depreciation):
| Year | Maximum depreciation |
|---|---|
| Year 1 | $20,400 |
| Year 2 | $19,800 |
| Year 3 | $11,900 |
| Year 4+ | $7,160 per year |
2024 limits (without bonus depreciation):
| Year | Maximum depreciation |
|---|---|
| Year 1 | $12,400 |
| Year 2 | $19,800 |
| Year 3 | $11,900 |
| Year 4+ | $7,160 per year |
These limits mean that for an expensive car ($60,000+), full depreciation takes many years beyond the standard 5-year MACRS recovery period.
Vehicles with a gross vehicle weight rating over 6,000 lbs are NOT subject to the luxury auto limits. This includes many full-size SUVs, trucks, and vans.
Common qualifying vehicles: Ford F-150, Chevy Silverado, Toyota Tundra, Ford Expedition, Chevy Tahoe, GMC Yukon, Jeep Grand Cherokee L, Mercedes GLS, BMW X5, Land Rover Defender, Tesla Model X.
Section 179 limit for SUVs: Even though heavy SUVs escape luxury auto limits, there's a separate Section 179 cap of $28,900 (2024) specifically for SUVs over 6,000 lbs. The remainder can use bonus depreciation.
Heavy non-SUV vehicles (trucks, vans built on a truck chassis): No special Section 179 limit. You can Section 179 the full cost up to the general $1,220,000 limit.
Important: The vehicle must be used >50% for business. If business use drops to 50% or below, you must recapture excess depreciation from prior years.
Standard mileage tends to win when: Your car is fuel-efficient, has low maintenance costs, is relatively new (fewer repairs), and you drive a lot of business miles. The rate includes a depreciation component that gives you a "phantom" deduction even on a paid-off car.
Actual expenses tend to win when: You have an expensive vehicle (high insurance, high depreciation), your car needs a lot of repairs, your business-use percentage is very high (80%+), or you can claim significant Section 179 or bonus depreciation in year 1.
Quick comparison: A freelancer driving 12,000 business miles in a Honda Civic:
In this case, standard mileage wins — and it's far less record-keeping.
A consultant driving 20,000 business miles in a BMW X5 (new, $65,000):
Actual wins dramatically in year 1 due to Section 179. But you're locked in for the life of the vehicle.
Each vehicle is tracked independently. You can use standard mileage for one and actual for another. But you can't use standard mileage for a fleet of 5 or more vehicles used simultaneously.
If you lease: you can use either the standard mileage rate OR actual expenses. If you choose actual, you deduct the business portion of lease payments (instead of depreciation). However, you may need to add back an "inclusion amount" from IRS tables if the vehicle's fair market value exceeds a certain threshold — this prevents using leasing to circumvent the luxury auto limits.
If you start with the standard mileage rate on a leased vehicle, you must use it for the entire lease period.