Home Office & Mileage Deductions for 1099 Freelancers
Two of the most common deductions for 1099 freelancers are also two of the most misunderstood: the home office deduction and the vehicle mileage deduction. Both reduce your net profit — and both feed directly into the "business expenses" figure in the calculator.
What are the two home office deduction methods?
To qualify at all, the space has to pass the IRS's exclusive-use test: a room or clearly defined area of your home used regularly and exclusively for business. A desk in the corner of a room you also use for other things generally doesn't qualify. Once you clear that bar, you choose one of two calculation methods each year:
- Simplified method: $5 per square foot of home office space, up to 300 square feet — a maximum deduction of $1,500. No need to track actual utility bills or depreciation; just measure the space.
- Regular (actual-expense) method: calculate the percentage of your home's total square footage used for business, then apply that percentage to your actual home expenses — mortgage interest or rent, utilities, insurance, repairs, and depreciation. This method takes more recordkeeping but can produce a larger deduction for a bigger dedicated office or a smaller home overall.
There's no requirement to use the same method every year — you can compare both and pick whichever gives the larger deduction for that tax year, as long as you follow the specific switching rules for depreciation if you've used the regular method before.
What are the two vehicle mileage deduction methods?
Vehicle use for business also has two calculation methods, and similarly you generally pick one for the vehicle each year (with some restrictions on switching, noted below):
- Standard mileage rate: multiply your business miles driven by the IRS's standard rate for the year. For 2026, that rate is $0.725 per mile for the first half of the year, rising to $0.76 per mile for the second half, following a mid-year IRS rate adjustment.
- Actual expenses: track the actual cost of operating the vehicle for business — gas, insurance, repairs, depreciation — then apply the percentage of total miles that were for business. More recordkeeping, but can be worth more for an expensive or heavily-used vehicle.
Worked example: mileage across a mid-year rate change
A freelancer who drives 4,000 business miles in the first half of 2026 and 4,000 more in the second half, using the standard mileage rate:
- First-half deduction: 4,000 miles × 72.5¢ = $2,900
- Second-half deduction: 4,000 miles × 76¢ = $3,040
- Total mileage deduction: $5,940
Add this to your other deductible business expenses, then enter the combined total in the calculator's "business expenses" field to see the effect on your tax.
Use the dedicated home office and mileage calculators to work out each deduction on its own. Neither is broken out separately in the main calculator — both simply reduce your net profit through the business expenses input, the same as any other deductible cost.
What records does the IRS expect you to keep?
For the home office deduction, keep a record of the square footage measurement and, if using the regular method, receipts for the home expenses you're allocating. For mileage, keep a contemporaneous log — date, starting point, destination, business purpose, and miles driven for each trip — rather than reconstructing an estimate at tax time. A log kept in an app or a simple spreadsheet, updated as you drive, holds up far better under review than a end-of-year guess.
Frequently asked questions
Can I use the simplified home office method and the standard mileage rate together?
Yes — the home office method and the vehicle-expense method are independent choices. You can use the simplified square-footage method for your home office and the standard mileage rate for your vehicle, or mix and match with the actual-expense methods, whichever combination gives you the larger deduction.
What counts as a home office for tax purposes?
The IRS requires the space to be used regularly and exclusively for business — a spare room used only as an office qualifies; a kitchen table used for both business and family dinners generally does not, under the exclusive-use test.
Do I need to keep a mileage log?
Yes. Whether you use the standard mileage rate or actual expenses, the IRS expects contemporaneous records of business miles driven — date, destination, business purpose, and miles — not a reconstructed estimate at tax time.
Can I switch between the standard mileage rate and actual expenses each year?
Generally, if you use the standard mileage rate in the first year you place a vehicle in service for business, you can switch methods in later years. If you start with actual expenses (including certain depreciation methods) in the first year, you may be locked out of the standard mileage rate for that vehicle going forward. Check current IRS guidance for your specific situation.