Standard Mileage vs Actual Expense Calculator 2026

2026 IRS Standard Mileage Rate

The IRS publishes the optional standard mileage rate annually. For 2026, the business rate is estimated at $0.70 per mile (subject to IRS Notice update — track irs.gov/tax-professionals/standard-mileage-rates for the official figure). The medical and moving rate is $0.22 per mile (active-duty military only post-TCJA), and the charitable rate stays at $0.14 per mile (statutory, not adjusted for inflation). The standard rate covers depreciation, gas, oil, maintenance, repairs, tires, registration fees, lease payments, and insurance — but NOT parking, tolls, or interest on a vehicle loan, which are deductible separately on Schedule C. Source: IRS Publication 463, Travel, Gift, and Car Expenses.

How the Actual Expense Method Works

The actual expense method deducts your real costs multiplied by the business-use percentage. Eligible expenses include gas, oil, repairs, tires, insurance, registration, lease payments (subject to inclusion amounts for luxury vehicles), and depreciation. You must keep receipts and a mileage log. The business-use percentage equals business miles ÷ total miles. Depreciation is computed via MACRS 5-year over six years (1.5 due to half-year convention) or Section 179 + bonus depreciation if elected in the first year. The 2026 luxury auto cap under §280F (assumed; IRS publishes annually) limits depreciation on passenger vehicles to approximately $20,500 in year 1 with bonus depreciation. Heavy SUVs over 6,000 lbs GVWR escape the §280F cap but face the §179 SUV cap of $30,500 in 2026 (estimated). Source: IRS Publication 946, How to Depreciate Property.

The "Lock-In" Rule for Standard Mileage

If you use the standard mileage rate in the first year you place a vehicle in service for business, you can switch between methods in later years. If you use actual expense in year 1, you are locked into actual expense for the life of that vehicle. This makes the first-year election important. For leased vehicles, if you choose standard mileage in year 1, you must use standard mileage for the entire lease term. This is a common error for new self-employed individuals — many take Section 179 in year 1 not realizing it forecloses the standard mileage option forever for that vehicle. Source: IRS Publication 463, Chapter 4.

When Each Method Wins

Standard mileage typically wins when business miles are high (15,000+) and vehicle cost is low or moderate ($25K-$45K). Actual expense wins for expensive vehicles ($60K+), heavy SUVs eligible for §179 in year 1, EVs (no fuel cost reduces standard mileage advantage), and very-low-mileage but expensive luxury vehicles. The OBBB extended 100% bonus depreciation for qualified property placed in service through 2026 — making actual expense more attractive for first-year vehicle purchases. Run the numbers both ways each year — the standard mileage rate increases yearly while actual costs may decline as the vehicle ages and depreciation runs out. See our Section 179 + Bonus Depreciation Calculator.

IRS Mileage Log Requirements That Survive an Audit (2026)

The IRS disallows vehicle deductions on audit more often than any other Schedule C line — usually for inadequate records, not for using the wrong method. Per IRS Publication 463 (2026), a compliant mileage log must record at the time of each trip (or shortly after — "reasonably contemporaneous"): (1) date, (2) starting and ending odometer or total miles, (3) destination, and (4) business purpose. Weekly reconstructions from Google Maps do NOT satisfy the "contemporaneous" test — courts have consistently ruled these inadequate (see Cole v. Commissioner, T.C. Memo 2016-22). Approved tools: MileIQ, TripLog, Everlance, or a paper log kept in the vehicle. Also required: total-mileage snapshots at January 1 and December 31 each year to establish business-use percentage. Under audit the burden of proof shifts to the taxpayer — no log, no deduction, regardless of whether trips actually occurred. Save logs for at least 3 years after filing (7 years if you claim under-reporting exceeds 25% of gross income). Last updated 2026-07-03.