For most small business owners, the miles you drive between clients, suppliers, job sites, and the bank quietly add up to one of the most overlooked tax deductions available. Every business trip you take in your personal or company vehicle can lower your taxable income — but only if you understand the rules and keep the right records. This guide breaks down exactly how to claim mileage, which method saves you the most, and how to avoid the mistakes that get deductions disallowed.
What Counts as Deductible Business Mileage
The core principle is simple: mileage is deductible when the trip has a genuine business purpose. That includes driving to meet clients, traveling between two work locations, running to pick up supplies or inventory, going to the bank for business banking, and visiting temporary work sites.
What does not count is your daily commute. Driving from home to your regular place of business is considered personal, no matter how far it is. The distinction matters because the IRS scrutinizes commuting closely, and claiming it is a common reason deductions get thrown out.
- Deductible: office to client, client to client, office to supplier, trips to the post office or bank for business.
- Not deductible: home to your regular office, personal errands, or detours that aren't business-related.
If you have a qualifying home office as your principal place of business, the rules shift in your favor — trips from a home office to other work locations can count as business miles rather than commuting.
The Two Ways to Claim Mileage
The IRS gives self-employed people and small business owners two methods to deduct vehicle costs. You generally choose one per vehicle, and the better choice depends on your car and how you drive it.
1. The Standard Mileage Rate
With this method, you multiply your total business miles by a flat per-mile rate set by the IRS each year. For 2024, the business standard mileage rate is 67 cents per mile. So if you drove 8,000 business miles, your deduction would be $5,360.
The standard rate is designed to cover gas, wear and tear, depreciation, and general vehicle costs in one simple figure. Its biggest advantage is simplicity: you only need an accurate count of your business miles rather than a shoebox full of receipts.
2. The Actual Expense Method
The actual expense method lets you deduct the real costs of operating your vehicle for business. That includes:
- Gas and oil
- Maintenance and repairs
- Insurance
- Registration and licensing fees
- Depreciation or lease payments
You add up all these costs for the year, then deduct the percentage that applies to business use. If 60% of your total miles were for business, you deduct 60% of your vehicle expenses. This method takes more bookkeeping, but it often produces a larger deduction for expensive vehicles, cars with high fuel or repair costs, or heavily used business vehicles.
Which Method Should You Choose?
There's no universal answer, but a few guidelines help. The standard mileage rate tends to win for fuel-efficient, lower-cost cars driven a lot of business miles. The actual expense method usually wins for pricier vehicles or ones with high operating and depreciation costs.
One important rule to know upfront: if you want the option to use the standard mileage rate for a car you own, you generally have to choose it in the first year the vehicle is used for business. After that, you can switch between methods in later years within IRS limits. If you start with actual expenses, you may be locked out of the standard rate for that vehicle. Because of this, it's worth running both calculations before you commit in year one.
Recordkeeping: The Part That Makes or Breaks the Deduction
No matter which method you use, the IRS expects contemporaneous records — meaning you log your trips as they happen, not reconstructed from memory at tax time. A reliable mileage log should capture:
- The date of each trip
- Starting point and destination
- Business purpose of the trip
- Miles driven
- Your total annual mileage (business plus personal)
That last point matters because both methods require you to establish your business-use percentage. Without a record of total miles, you can't credibly prove what share of your driving was for business.
Keeping a paper logbook works, but it's easy to forget entries and hard to keep accurate over a full year. This is where an app that logs your drives automatically earns its keep — Rienly, for instance, tracks your mileage and keeps your vehicle's maintenance schedule in one place, which doubles as useful documentation if you're using the actual expense method. Whatever tool you use, the goal is the same: a clean, complete record you can stand behind if you're ever asked to justify the deduction.
How to Actually Claim It on Your Taxes
As a self-employed individual or small business owner, you report your vehicle deduction on Schedule C along with your other business income and expenses. Here's the general flow:
- Total your business miles for the year from your log.
- Calculate your deduction using either the standard rate (miles × rate) or actual expenses (total costs × business-use percentage).
- Report it on Schedule C in the car and truck expenses section.
- Keep your log and receipts with your tax records — you don't submit them, but you need them if the IRS asks.
If your business is structured as a corporation and you drive your personal vehicle for work, the cleaner approach is often to set up an accountable reimbursement plan, where the business reimburses you for business mileage at the standard rate. That reimbursement is tax-free to you and deductible for the business, as long as you submit proper mileage documentation.
Employee vs. Self-Employed: Why the Rules Differ
It's worth understanding the broader landscape, because the rules changed significantly in recent years. Self-employed workers and business owners can still deduct qualified business mileage using either the standard rate or actual expenses. Regular W-2 employees, however, generally can no longer deduct unreimbursed business mileage on their federal returns — which is exactly why reimbursement plans matter so much for anyone operating through a company.
The takeaway for small business owners: your ability to claim mileage is a genuine advantage of self-employment, so don't leave it on the table by failing to track your drives.
Common Mistakes to Avoid
- Claiming your commute. Home-to-regular-office miles are personal, not deductible.
- Estimating instead of logging. Round numbers and reconstructed logs are red flags in an audit.
- Mixing methods incorrectly. You can't claim the standard rate and then also deduct gas and repairs separately for the same vehicle.
- Forgetting total mileage. Without your annual total, you can't prove your business-use percentage.
- Locking yourself out of the standard rate. Choosing actual expenses in year one can eliminate that option later.
The Bottom Line
Claiming mileage as a small business owner comes down to three steps: know which trips qualify, pick the method that gives you the bigger deduction, and keep records solid enough to back it up. The standard mileage rate keeps things simple, while the actual expense method rewards owners with costlier vehicles who are willing to track every expense. Either way, the deduction is only as good as your documentation — so start logging your miles consistently now, well before tax season, and let those everyday business drives work in your favor.