Standard mileage vs. actual expenses: which saves more
Same car, same business miles, two different deductions — and the gap between them can run into thousands of dollars depending on what the vehicle actually cost and how new it is.
The two methods, in one sentence each
A flat per-mile rate, set annually (and occasionally mid-year) by the IRS, multiplied by business miles driven — a single number that bundles gas, depreciation, insurance, maintenance, and repairs into one figure.
Every real cost of operating the vehicle — gas, insurance, repairs, registration, lease payments or depreciation, loan interest — added up and multiplied by the business-use percentage, the share of total miles that were for business rather than personal use.
The 2026 standard mileage rates
2026 has two business rates, not one — the IRS raised the rate mid-year, which doesn't happen most years.
The trip date decides which rate applies — a mileage log spanning both halves of the year needs to be split at June 30, not averaged. See the mileage deduction calculator for the split calculation.
What the flat rate actually bundles in
Standard mileage isn't just a gas-and-wear-and-tear number — a real depreciation allowance is baked into it, which is exactly why the comparison depends so heavily on what the vehicle cost.
A portion of the standard rate — historically in the range of 27-33 cents per mile, adjusted periodically — represents deemed depreciation. That figure is fixed regardless of the vehicle's actual price, which is the whole reason the two methods diverge so sharply between a cheap car and an expensive one: a $18,000 sedan's real depreciation is often close to that deemed allowance, while a $65,000 truck's real depreciation, especially with bonus depreciation available in the first year, runs far above it.
Worked example: a cheap, efficient car
A freelance photographer drives a 4-year-old $18,000 sedan 10,000 business miles in the second half of 2026 (76¢ rate). Standard mileage: 10,000 × $0.76 = $7,600.
Actual expenses for the year: $2,400 gas, $1,400 insurance, $900 repairs and maintenance, $300 registration, and $2,200 in remaining depreciation (the vehicle is several years old, so most of its depreciable value is already used up) — $7,200 total, at 72% business use (10,000 of 13,900 total miles), giving a $5,184 deduction.
Standard mileage wins here by over $2,400, almost entirely because the deemed depreciation baked into the flat rate is higher than what's left to depreciate on an older, already-mostly-depreciated vehicle.
Worked example: a new, expensive vehicle
A contractor buys a new $58,000 heavy pickup in January 2026 and drives it 10,000 business miles at 80% business use for the year (weighted across both mileage-rate periods, blended to roughly $0.744/mile average). Standard mileage: approximately $7,440.
Actual expenses: $4,600 gas, $2,800 insurance and registration, $1,600 repairs, and — because the truck exceeds the 6,000-pound GVWR threshold that exempts it from passenger-vehicle depreciation caps — up to $32,000 under Section 179 on the business-use portion plus bonus depreciation on the remaining basis in year one. Even a conservative first-year depreciation figure of $20,000 pushes total actual expenses well past $28,000 before the business-use percentage is even applied; at 80% business use, that's roughly $22,700 in deductible actual expenses.
Actual expenses wins by a wide margin here — over $15,000 — entirely because of the accelerated depreciation available on a heavy vehicle in its first year, which the flat standard-mileage rate makes no attempt to match.
The lock-in rule most people miss
The choice made in the vehicle's first year of business use isn't always reversible later. Choosing standard mileage in year one keeps the door open to switch to actual expenses (using straight-line depreciation) in a later year, or switch back. Choosing actual expenses in year one — specifically, claiming Section 179 or bonus depreciation — locks that vehicle into actual expenses for every remaining year it's used in the business. The most expensive version of this mistake: claiming accelerated depreciation on a vehicle in year one, then discovering in year two that standard mileage would have produced a better multi-year result, with no way back.
Record-keeping either way
Date, destination, business purpose, and miles driven, logged at or near the time of the trip — not reconstructed from memory at filing time. Required under both methods.
Every deducted cost under the actual expense method needs a receipt or statement, not just an estimate. The business-use percentage still applies even to costs, like insurance, that are billed as a flat annual amount.
Total miles driven for the year, not just business miles, are needed to calculate the business-use percentage the actual expense method depends on — a reading at the start and end of the year covers this.
Run both methods on your own numbers with the mileage deduction calculator — it splits the year at the July 1 rate change automatically and compares both methods side by side.
Frequently asked questions
It depends on the vehicle's cost, age, and business-use percentage. Standard mileage tends to win for lower-cost, fuel-efficient, high-mileage vehicles, since the flat per-mile rate bundles in an implicit depreciation allowance that doesn't require an expensive vehicle to make worthwhile. Actual expenses tends to win for a newer or more expensive vehicle, especially in its first few years, when real depreciation and financing costs run higher than the standard rate's built-in allowance.
Only if you chose standard mileage in the first year the vehicle was placed in service for business use — then you can alternate between the two methods in later years. If you chose actual expenses (specifically, if you claimed accelerated depreciation like Section 179 or bonus depreciation) in the first year, you're locked into actual expenses for that vehicle for as long as you use it in the business.
It nudges the comparison slightly in standard mileage's favor for the second half of 2026 — the rate rose from 72.5 to 76 cents per mile on July 1, an increase that widens the gap for any vehicle where standard mileage was already close to actual expenses. It doesn't change the fundamental comparison for a vehicle where actual expenses clearly wins, like an expensive new vehicle in its first year of heavy depreciation.
Gas, insurance, repairs and maintenance, registration fees, lease payments or depreciation, and loan interest (for a self-employed filer; W-2 employees generally cannot deduct vehicle loan interest). Each is multiplied by the business-use percentage — the share of total miles driven for business rather than personal use — except items like parking and tolls specifically incurred on business trips, which are 100% deductible regardless of method.
Yes — both methods require substantiating business miles driven with a contemporaneous log (date, destination, business purpose, miles), and the actual expense method additionally requires receipts for every deducted cost. Skipping the log is the single most common reason an otherwise legitimate mileage deduction gets disallowed on audit, regardless of which method was used.
Glossary:Standard Mileage Rate