If you drive your personal vehicle for work, you get two ways to deduct what that vehicle costs you, including the section 179 deduction if you go with actual expenses. One of them almost always puts more money back in your pocket. Knowing which one before you file is worth a few minutes, because the choice you make in a vehicle’s first year shapes what you’re allowed to do in every year after.
Here’s how both methods work, when each one wins, and what to weigh before you commit.
The Two Methods, Side by Side
The Standard Mileage Method
To use this method, you multiply your business miles by one IRS rate. For 2026, that rate is 76 cents per mile ($0.76) for business driving. Log the miles, apply the rate, and you have your deduction. See how the 2026 standard mileage rate is set and what it covers.
That single number is built to cover your average per-mile costs: fuel, maintenance, insurance, registration, and the vehicle’s gradual loss of value as it wears out. Because those costs are already baked in, you don’t track or deduct any of them on their own.
What you can still deduct on top of the rate:
- Parking fees
- Tolls
- Other business related expenses
What’s already included in the rate (so you can’t deduct it separately):
- Gas
- Oil changes
- Tire replacement
- Insurance premiums
- Registration fees
- The vehicle’s depreciation (its value written off gradually as it wears out)
The Actual Expense Method
With this method, you track every dollar your vehicle costs you across the year, then deduct the share used for business.
Deductible actual expenses include:
- Fuel (gas, diesel, or electricity)
- Oil changes and maintenance
- Tire replacement
- Insurance (the full-year premium)
- Registration and license fees
- Repairs
- Loan interest (the business portion)
- Depreciation, meaning the vehicle’s value written off gradually over time, or Section 179, a rule that lets you write off certain purchases up front in the year you buy them
To find your business share, you use your business-use percentage. That’s simply how much of your driving was for work:
Say you drove 18,000 business miles out of 24,000 total miles. That’s 18,000 ÷ 24,000 = 0.75, so your business-use percentage is 75%. You’d deduct 75% of your vehicle expenses.
What Is the Section 179 Deduction?
If you’re using the actual expense method, the section 179 deduction is one of the bigger levers available to you. Instead of writing off a vehicle’s cost gradually through depreciation over several years, it lets you deduct a large share of that cost, sometimes the entire business-use portion, in the very first year you put the vehicle to work. It’s only available if the vehicle is used for business more than half the time, and only under the actual expense method. If you use the standard mileage method, that cost is already folded into the $0.76 rate.
Here’s the part that’s easy to miss: choosing the section 179 deduction doesn’t lower what you need to prove, it raises it. Vehicles fall under a stricter set of IRS recordkeeping rules, and those rules ask for a record made at or near the time you drove, not one rebuilt from memory later, to back up your business-use percentage. If your business use ever drops to half or less in a later year, some of what you deducted upfront may need to be added back as income. A mileage log is what makes that business-use percentage, and the deduction built on it, hold up if you’re ever asked to show your work.
Source: IRS Publication 463; Internal Revenue Code Section 274(d).
How the two compare at a glance
| Standard Mileage | Actual Expenses | |
|---|---|---|
| What you track | A mileage log | Every fuel, repair, insurance, and registration receipt, plus miles |
| The math | Business miles × IRS mileage rate | Total vehicle costs × business-use % |
| Fuel, insurance, maintenance | Included in the rate | Deducted individually |
| Depreciation | Built into the rate | Calculated on IRS schedules, or written off up front |
| Parking and tolls | Deductible on top | Deductible on top |
| Recordkeeping load | Medium | Heavy |
Parking and tolls sit outside both methods. You can deduct them either way.
Two Drivers, Two Outcomes
The fastest way to see the difference is to run real numbers. Here are two drivers, same year, very different results.
The rideshare driver: standard mileage wins
Maria drives for rideshare in a reliable, inexpensive-to-run sedan. This year she logged 18,000 business miles out of 24,000 total (a 75% business-use share).
Standard mileage: 18,000 × $0.76 = $13,680. Add $300 in tolls and parking on top, and she’s at $13,980.
Actual expenses: her full-year vehicle costs came to $8,900 (fuel $3,200, insurance $1,600, maintenance and repairs $900, registration $200, depreciation $3,000). Her business share is 75%, so 8,900 × 0.75 = $6,675. Add the same $300 in tolls and parking, and she’s at $6,975.
Standard mileage nearly doubles her deduction, $13,980 against $6,975, and it asks for a fraction of the paperwork. For a high-mileage driver in an ordinary car, that’s the usual story.
The plumber’s van: actual expenses win
Dave runs a plumbing business out of a heavy commercial van. He drove 6,000 business miles out of 10,000 total this year (a 60% business-use share).
Standard mileage: 6,000 × $0.76 = $4,560.
Actual expenses: the van is expensive to feed and maintain. His full-year costs came to $12,600 (fuel $4,000, insurance $2,400, maintenance and repairs $1,800, registration $400, depreciation $4,000). His business share is 60%, so 12,600 × 0.60 = $7,560.
Here actual expenses come out ahead, $7,560 against $4,560, because the van’s real per-mile cost runs higher than the standard rate and Dave doesn’t drive enough business miles for the rate to catch up.
The Rule That Shapes Everything: The First-Year Choice
For a vehicle you own, you have to use the standard mileage method in the first year you put it into business service if you want the freedom to choose later. Whichever you land on, you still need a log that holds up either way.
- Use actual expenses in Year 1, and you’re generally locked into actual expenses for that vehicle (with narrow exceptions).
- Use standard mileage in Year 1, and you can switch to actual expenses in a later year (though the depreciation math gets fiddly once you do).
Leased vehicles play by a stricter rule, and it matters. If you pick the standard mileage rate for a leased vehicle, the IRS generally holds you to it for the entire lease, including any renewals. There’s no switching to actual expenses partway through.
So if you lease, this decision is more permanent than it is for an owned vehicle. Talk it through with a tax professional before you lock in a method.
When the Standard Method Usually Wins
For a lot of solo workers, real estate agents, gig drivers, mobile service pros, the standard rate comes out ahead. A few reasons why:
You drive a lot of miles in an ordinary car. Rack up the miles in a vehicle that’s cheap to run, and $0.76 per mile tends to outrun your real costs by a wide margin. Maria’s numbers above are the classic case. For gig drivers running high mileage, this is usually the whole ballgame.
The paperwork is far lighter. Standard mileage needs one thing: a mileage log. Actual expenses need every fuel receipt, every repair invoice, every insurance statement, tracked all year. Without a bookkeeper, that’s a real weight to carry.
Depreciation is handled for you. Under standard mileage, the vehicle’s gradual loss of value is folded into the rate. Under actual expenses you work it out on IRS depreciation tables or write part of it off up front, which is more moving parts and more limits.
The rate doesn’t care what you drive. Your deduction is the same per mile whatever’s in your driveway. Actual expenses can beat it, but only when your genuine costs climb above what the rate would have given you.
When Actual Expenses May Win
A new, expensive vehicle in its first year. Put a pricey new vehicle into service and use Section 179 or bonus depreciation, and you may be able to write off a large share of its cost in Year 1, potentially well above what the rate delivers. Remember the catch: choose actual expenses in that first year and you generally can’t switch methods for that vehicle later.
A vehicle that’s costly to operate. The winner tracks your real operating costs. Dave’s van above is the example: high fuel, frequent maintenance, steep insurance can push your true per-mile cost past the standard rate.
Low business miles with high fixed costs. Drive only a few thousand business miles but carry a hefty insurance bill, and your per-mile actual cost climbs high enough that actual expenses can pull ahead.
The test: run the math both ways for your own situation and consult a tax professional to help you decide which method you should use.
Why Solo Workers Reach for FuelMath on the Standard Method
For drivers with real business miles and a typical car, the math leans standard mileage, and the simplicity is the other half of the appeal. You keep a mileage log, not a shoebox of mixed receipts. For the full picture on mileage and taxes for self-employed drivers, start with our hub.
FuelMath is built for exactly that. Describe a trip in plain words and FuelMath fills in a trip card for you: date, from, to, miles, purpose, and an estimated deduction at the 2026 rate. You give it a quick look, then tap save. Log a trip in seconds, watch your running deduction total climb, and skip the manual math, the spreadsheet, and the rate lookup.
For the costs you deduct alongside standard mileage, parking, tolls, and other business expenses, FuelMath Pro lets you log those too. Describe the expense, let FuelMath suggest a category, and attach a receipt if you want one on file. Everything lands in one running total and one exportable record.
Google Calendar integration is coming soon.
And because tracking your driving shouldn’t cost you your privacy, FuelMath uses no GPS and never sells your data. You describe your trips; FuelMath doesn’t follow you around.