Vehicle Expenses

Vehicle Expenses: Mileage vs. Actual Cost

A vehicle used for business—driving to client meetings, making deliveries, visiting job sites, transporting equipment—generates a deductible business expense. The IRS provides two methods for calculating that deduction: the standard mileage rate and the actual expense method. Choosing between them requires understanding which produces the larger deduction given your vehicle's cost, fuel efficiency, and how heavily you use it for business versus personal purposes.

Most self-employed people default to the standard mileage rate because it requires less record-keeping. In many situations, the actual expense method produces a substantially higher deduction. Running the comparison at least once—when you first begin using a vehicle for business—determines which method serves you better and locks in the decision for that vehicle.

THE STANDARD MILEAGE RATE

The IRS sets a standard mileage rate that changes annually. For 2024, the rate is 67 cents per business mile. This rate is designed to approximate the total per-mile cost of operating a vehicle, including fuel, depreciation, insurance, maintenance, and repairs.

To use the standard mileage rate:

- Track business miles driven throughout the year (the IRS requires a contemporaneous mileage log) - Multiply business miles by the applicable rate

- The result is your total vehicle deduction

Example: A freelance photographer drives 12,000 business miles in 2024. Deduction: 12,000 × $0.67 = $8,040

In addition to the mileage rate, you can still deduct parking fees and tolls incurred for business purposes—these are not included in the per-mile rate.

The standard rate has limitations: you cannot also deduct actual fuel, insurance, maintenance, or depreciation—those costs are bundled into the 67-cent rate. The simplicity is the tradeoff.

THE ACTUAL EXPENSE METHOD

The actual expense method deducts the actual costs of operating the vehicle, multiplied by the business-use percentage of total driving.

Deductible actual vehicle costs include:

- Gasoline and oil - Insurance - Registration and license fees (the deductible portion) - Lease payments (if leased)

- Depreciation (if owned)

- Repairs and maintenance - Tires - Garage rent

Business-use percentage: Total business miles ÷ Total miles driven (business + personal + commuting)

Example: The same photographer drives 18,000 total miles in 2024—12,000 business and 6,000 personal. Business-use percentage: 66.7%.

Actual annual vehicle costs:

- Fuel: $2,800 - Insurance: $1,800 - Maintenance and repairs: $900 - Registration: $300 - Depreciation: $4,500 (calculated using IRS Modified Accelerated Cost Recovery System, or MACRS)

- Total costs: $10,300

Deduction: $10,300 × 66.7% = $6,870

In this example, the standard mileage rate produces a higher deduction ($8,040 vs. $6,870). But the math changes with a more expensive vehicle, a fuel-inefficient vehicle, or a higher business-use percentage.

WHEN THE ACTUAL METHOD WINS

The actual expense method tends to produce a higher deduction when:

The vehicle is expensive: Depreciation on a $70,000 vehicle is much larger than on a $22,000 vehicle, and that depreciation flows through the actual method. The standard mileage rate applies the same 67 cents per mile regardless of whether you're driving a Honda Civic or a BMW.

Section 179 and bonus depreciation: In the first year of business use, the IRS allows accelerated depreciation through Section 179 expensing or bonus depreciation. For passenger vehicles, annual depreciation limits cap the benefit (the IRS sets "luxury auto" limits, which in 2024 allow a maximum of $20,400 in first-year depreciation if bonus depreciation applies, and $12,400 for the standard first-year ceiling). For heavier vehicles—SUVs over 6,000 pounds GVWR, trucks, and vans—the limits are significantly higher. An SUV over 6,000 pounds used 100% for business can be eligible for Section 179 expensing of up to $30,500 in 2024, and potentially bonus depreciation on the remainder, generating a first-year deduction that dramatically exceeds the standard mileage rate.

The vehicle has high operating costs: Older vehicles with significant maintenance expense, trucks with high fuel costs, or vehicles with expensive insurance can produce actual costs that exceed the standard rate's approximation.

THE LOCK-IN RULE

This is the most consequential rule in the vehicle expense decision: if you use the actual expense method in the first year a vehicle is placed in service for business, you must continue using the actual method for that vehicle in all subsequent years. You cannot switch to the standard mileage rate in a later year to capture its simplicity.

The reverse is not true: you can switch from the standard mileage rate to the actual expense method in a later year, though doing so requires depreciating the vehicle using the straight-line method rather than MACRS, reducing the depreciation advantage somewhat.

This means the decision in year one—typically when first-year depreciation under the actual method is highest—sets the course for the vehicle's entire business life. Running both calculations in year one, before filing the return, is essential. If the actual method produces significantly higher deductions in year one due to depreciation, the lock-in may be advantageous even if the standard method would be simpler in later years.

MILEAGE LOGS: THE NON-NEGOTIABLE REQUIREMENT

Both methods require a mileage log to satisfy IRS substantiation requirements. Under IRC Section 274(d), vehicle expenses are listed property subject to strict documentation requirements. The IRS requires recording for each business trip:

- Date of the trip

- Business destination - Business purpose - Odometer reading at start and end (or miles driven)

"I drove around for meetings" is not sufficient. "March 14: drove from home office to client meeting at XYZ Corp, 18 miles, quarterly planning presentation" is sufficient.

Contemporaneous documentation—recorded at or near the time of the trip—carries more weight than reconstructed logs created at tax time. Several mobile apps (MileIQ, Everlance, TripLog, Stride) automatically track mileage via GPS and allow trip categorization; these apps produce IRS-compliant logs with minimal effort and are the practical standard for self-employed workers with significant business driving.

Odometer readings at the beginning and end of each year, documenting total miles driven, are also useful for calculating the business-use percentage under the actual method.

COMMUTING IS NEVER DEDUCTIBLE

One firm rule: commuting—driving from home to a regular fixed workplace—is never a business deduction under either method, even for self-employed workers. If you drive from home to your regular office building and back, those miles are personal commuting, not business travel.

Exceptions: If your home qualifies as your principal place of business (home office deduction), trips from your home office to client locations or temporary work sites are deductible business miles. The home office characterization transforms the starting point from personal residence (non-deductible commute) to business location (deductible business travel).

For gig workers who drive to a depot or staging area before beginning delivery routes, the miles from home to the depot are likely commuting and not deductible; miles after the first business stop are business miles. The IRS has issued guidance on this for delivery and rideshare drivers, and the rules have been applied inconsistently—conservative tracking of all business-related miles from the first stop is the defensible approach.

THE SELF-EMPLOYED VEHICLE DEDUCTION SUMMARY

For most self-employed workers with a moderately priced, relatively fuel-efficient vehicle driven about 50% for business, the standard mileage rate is close to the actual expense method in deduction value and significantly simpler to administer. The actual method earns its additional complexity when the vehicle is expensive, heavy, or predominantly business-use, particularly in the first year when accelerated depreciation is available.

The decision is not irrevocable for future vehicles—it applies vehicle by vehicle. Making it deliberately, with both calculations in hand for the first year of each vehicle's business use, produces consistently better outcomes than defaulting to the standard rate and never revisiting the question.