The IRS sets a standard mileage rate each year that accounts for the average cost of operating a vehicle — fuel, depreciation, insurance, maintenance, and registration. For 2025, the standard business mileage rate is 67 cents per mile.
That means if you drove 20,000 business miles in 2025, your deduction is $13,400 — without tracking a single gas receipt. For high-mileage drivers, this is an enormous deduction that requires nothing more than a consistent mileage log.
The standard mileage method is exactly what it sounds like: multiply your business miles by the IRS rate. That's your deduction. No tracking of gas, oil changes, insurance, or repairs — the rate covers all of that.
If you want to use the standard mileage method, you must elect it in the first year the vehicle is placed in service for business. If you claim actual expenses (including depreciation or Section 179) in year one, you are locked into the actual expense method for that vehicle's entire business life. Plan this upfront when you put a new vehicle into business use.
The actual expense method tracks every dollar you spend operating the vehicle, then applies your business-use percentage to determine the deductible amount.
You then multiply the total of all these expenses by your business-use percentage. If you drove 30,000 miles total and 22,000 were business miles, your business-use percentage is 73.3% — and you deduct 73.3% of every vehicle expense.
Section 179 allows you to deduct the full purchase price of a qualifying vehicle in the year you buy it — rather than depreciating it over 5 years. This can produce a massive first-year deduction.
However, the IRS imposes strict limits on passenger vehicles to prevent abuse:
The 6,000 lb GVWR threshold is why you see tax advisors sometimes recommend specific SUV models. Vehicles like the Cadillac Escalade, Chevy Tahoe, Ford Expedition, and similar heavy-duty SUVs exceed 6,000 lbs and qualify for more favorable deduction limits.
For passenger vehicles placed in service in 2025 (without Section 179 or bonus depreciation), the IRS annual depreciation caps are approximately:
A $60,000 sedan used 100% for business would take many years to fully depreciate under these caps. A qualifying heavy-duty truck used 100% for business could be fully written off in year one.
Very few vehicles are used 100% for business. You must track your business-use percentage accurately, and that percentage must be substantiated by records — not estimated. The IRS is explicit: a mileage log is required. Reconstruction after the fact is not accepted.
Business miles include: driving to client meetings, job sites, suppliers, bank, post office for business purposes, and business travel. They do not include commuting to a fixed office location (though if your home is your principal place of business, driving from home to client sites is business travel — see our home office article).
Personal miles include: commuting, personal errands, vacations, driving family members. Track both; report the business percentage accurately.
The IRS requires your mileage log to contain four elements for each business trip:
You also need to record your odometer reading at the start and end of the year to establish total annual mileage.
Recommended apps that automate this: MileIQ (automatic tracking, swipe to classify trips), Everlance (automatic tracking with expense tracking built in), Hurdlr (integrates with accounting software). Any of these eliminates the need for a paper log and produces IRS-compliant reports.
This is the most commonly misunderstood rule in vehicle deductions. Driving from your home to your regular, fixed office location every morning is commuting — it is not deductible, period. The IRS made this determination decades ago.
However, driving from any business location to another business location is deductible. This includes home-to-client if your home qualifies as your principal place of business (i.e., you have a legitimate home office). It also includes office-to-client, client-to-client, and office-to-supplier.
If you use multiple vehicles for business, you are allowed to use a different method for each vehicle — but you must choose the method for each vehicle before it is first used for business, and you cannot switch from actual expenses to standard mileage mid-ownership (though you can switch from standard mileage to actual expenses in a later year with some restrictions).
North Carolina generally conforms to federal tax treatment for vehicle deductions. There is no separate state-level vehicle deduction mechanism — the federal deduction flows through to your NC state return. However, NC has its own rules around bonus depreciation and Section 179 add-backs in some years; your tax preparer should review NC conformity adjustments when claiming large first-year vehicle deductions.
Standard Mileage Method:
25,000 miles × $0.67 = $16,750 deduction. No receipts required. Simple.
Actual Expense Method — 2024 Ford F-150, $52,000 purchase price, 80% business use:
Total first-year with Section 179: ~$47,360 — vs. $16,750 standard. For a new heavy-duty vehicle, actual expense wins by a large margin in year one. Standard mileage wins in later years once depreciation runs out.
Hykes Financial Group has saved NC small business owners an average of $14,800/year. See what we can save you.
Book Your Free Checkup →