What is the standard mileage rate for 2026?

The IRS announces the standard mileage rate every December for the upcoming year. For 2026, the estimated rate is around 68 cents per mile. Always check IRS.gov for the exact official rate before filing.

Can I switch from the Actual Expenses method to Standard Mileage later?

Usually, no. If you use the Actual Expenses method in the first year you use a vehicle for business, you generally cannot switch to the Standard Mileage rate in later years for that same vehicle. However, if you start with the Standard Mileage rate, you can often switch to Actual Expenses later.

Does driving to work count as business mileage?

No. The IRS strictly classifies driving from your home to your primary place of business (your office or storefront) as "commuting." Commuting miles are never deductible. You can only deduct miles driven between your primary office and a secondary location (like a client site, the bank, or a supply store).

How do I prove my business mileage in an audit?

The IRS requires a contemporaneous mileage log. This means you must record the date, destination, business purpose, and total miles driven at or near the time of the trip. The easiest way to do this is using a GPS tracking app like MileIQ or Everlance.

Vehicle Deduction: Standard Mileage vs Actual Expenses (2026)

Outside of the home office deduction, the vehicle deduction is the most common write-off claimed by small business owners. If you use your car to visit clients, pick up supplies, or travel to business meetings, the IRS allows you to deduct the cost of operating that vehicle.

However, because business owners often use the same car for both business and personal reasons, the IRS has very strict rules on how you calculate this deduction. You must choose between two calculation methods: The Standard Mileage Rate or the Actual Expenses Method.

1. The Golden Rule of Vehicle Deductions

Before choosing a method, you must understand one fundamental rule: You can never deduct 100% of your vehicle expenses if you also use the car for personal driving.

If you drive 10,000 miles in a year, and 4,000 of those miles were for business trips while 6,000 were for grocery runs and weekend road trips, your "business use percentage" is 40%. You can only ever deduct 40% of the vehicle's costs.

2. The Standard Mileage Rate Method

This is by far the easiest and most common method. Instead of saving receipts for every drop of gas and oil change, the IRS simply gives you a flat monetary rate for every business mile you drive.

The rate fluctuates every year based on the national average cost of gas and car maintenance (it is typically around 65 to 68 cents per mile). To use this method, you simply multiply your total business miles by the IRS rate.

Example: You drive 5,000 business miles. The rate is $0.67/mile. Your deduction is $3,350.

This method automatically accounts for gas, repairs, insurance, and depreciation. You cannot deduct those items separately if you use the standard mileage rate (though you can deduct business parking fees and tolls separately).

3. The Actual Expenses Method

This method requires meticulous record-keeping. You must track every single dollar you spend on your car throughout the entire year, including:

Gas and oil
Repairs and maintenance
Tires
Car insurance
Registration fees
Vehicle depreciation (or lease payments)

At the end of the year, you multiply the grand total of these expenses by your "business use percentage" (which you calculated based on your mileage log).

Example: You spent $8,000 total on your car this year. Your mileage log shows 40% of your driving was for business. Your deduction is $3,200 ($8,000 x 0.40).

Which is better? If you drive an inexpensive, fuel-efficient car (like a Prius) for thousands of miles, the Standard Mileage rate usually results in a larger tax break. If you drive a very expensive, gas-guzzling SUV with high repair costs, the Actual Expenses method might yield a larger deduction.

The Trap of Switching Methods

If you choose the Actual Expenses method in the very first year you use your car for business, you are permanently locked into that method for the life of the vehicle. If you choose the Standard Mileage rate in the first year, you can usually switch back and forth between methods in future years to see which offers the best deduction.

4. The Commuting Rule

The IRS is incredibly strict about "commuting." Commuting is defined as driving from your home to your primary, regular place of business (like an office building or retail store). Commuting miles are never deductible.

You can only deduct miles driven from your primary office to a secondary business location (like driving from your office to a client's headquarters). If your primary office is a qualified Home Office, then driving from your home to a client's location is deductible, because you are driving between two business locations.

5. Recordkeeping Requirements

If you are audited, the IRS will immediately ask for your mileage log. If you do not have one, they will disallow your entire vehicle deduction and charge you penalties. A proper log must be kept contemporaneously (at the time the driving occurs) and must include:

The date of the trip
The starting location and destination
The business purpose of the trip
The total miles driven

Do not try to reconstruct a mileage log in Excel two years later from memory. Use an automatic GPS tracking app like MileIQ or Everlance that runs silently on your phone and automatically creates IRS-compliant logs.

6. Buying a Heavy Vehicle (Section 179)

You may have heard of the "G-Wagon Loophole." Under Section 179 of the tax code, if you buy a heavy vehicle (over 6,000 lbs Gross Vehicle Weight Rating, like a heavy-duty truck or large SUV) and use it more than 50% for business, you can often deduct a massive portion of the purchase price in the very first year, rather than depreciating it slowly over five years.

However, the IRS has cracked down heavily on this. If you claim this massive deduction, you must use the Actual Expenses method, and you must maintain strict mileage logs proving the vehicle is used primarily for business, not for personal family trips.