The Best Mileage Deduction Calculator for All Three IRS Categories
Most mileage calculators only handle business miles at the business rate. This one splits your miles across all three IRS categories — business ($0.67), medical ($0.21), and charity ($0.14) — compares the standard rate against your actual vehicle expenses, and shows exactly how much each deduction cuts your quarterly estimated payment.
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2024 IRS mileage rates: $0.67/mi business, $0.21/mi medical, $0.14/mi charity. Split your miles by purpose, compare standard rate vs actual expenses (gas, insurance, depreciation, maintenance), and see your tax savings and quarterly payment reduction.
- ✗Only business mileage is covered — the IRS has three deductible mileage categories: business ($0.67/mi), medical/moving ($0.21/mi), and charitable ($0.14/mi). Most calculators ignore the last two entirely, leaving money on the table for users who drive for medical appointments or volunteer work.
- ✗Standard vs actual comparison is missing — for high-cost vehicles or low-mileage drivers, deducting actual vehicle expenses (gas + insurance + depreciation + maintenance) × business-use% can beat the flat rate. Most calculators don't offer this comparison.
- ✗The vehicle type distinction isn't surfaced — the IRS uses the same mileage rates for cars, motorcycles, and vans/trucks, but the distinction matters for your records. Most calculators don't capture this.
- ✗Quarterly payment reduction is never shown — knowing your annual deduction is only half the picture. Freelancers and 1099 workers pay quarterly estimates; the real question is how much this deduction reduces each payment.
- ✗IRS log requirements aren't explained — the mileage deduction requires a contemporaneous log (date, destination, business purpose, miles). Calculators that omit this leave users exposed at audit.
Slide the business, medical/moving, and charity percentages independently. Each category uses the correct 2024 IRS rate — $0.67, $0.21, and $0.14/mile respectively. Personal miles are the remainder. All three deductions shown side by side.
Enter your gas, insurance, depreciation, and maintenance for the year. The calculator applies your business-use percentage and shows which method — flat rate or actual expenses — gives you the larger business deduction, with the advantage labeled.
Business mileage reduces your Schedule C net profit, cutting both self-employment tax (15.3%) and federal income tax simultaneously. Set your effective rate with the slider and see exactly how much each quarterly IRS estimated payment drops.
The mileage deduction requires contemporaneous records — date, destination, business purpose, and miles per trip. Reconstructed logs created at tax time are frequently disallowed at audit. The ShowMath panel surfaces this requirement with the IRS Pub 463 citation.
| Feature | Typical Calculator | Reise Tools |
|---|---|---|
| Business mileage at $0.67/mi (2024) | ||
| Medical mileage at $0.21/mi | ||
| Charity mileage at $0.14/mi | ||
| Purpose split sliders (business/medical/charity) | ||
| Standard vs actual expense method comparison | ||
| Actual expenses broken out (gas, insurance, depr, maint) | ||
| Quarterly estimated payment reduction shown | ||
| IRS mileage log requirement explained | ||
| Formula shown for every output | ||
| Free with no account required |
Every Reise calculator has a ShowMath panel — expand it and you see the exact formula with your actual numbers substituted in. Not a result. Not a black box. The full derivation, step by step.
The mileage deduction is one of the most commonly missed deductions for freelancers who drive for work. If you're using the standard rate, you get a substantial per-mile deduction with minimal recordkeeping — just a log. If your vehicle is expensive to operate, the actual expense method might beat it. This calculator shows both before you commit.
Compare IRS Simplified ($5/sq ft, max $1,500) vs Regular/Form 8829 side by side. Enter rent or mortgage expenses, see both deductions, the winner, tax savings at your rate, and quarterly payment reduction.
Calculate your exact self-employment tax using the IRS formula. Shows SE tax (SS + Medicare), the half-SE deduction, 2024 federal income tax brackets, effective rate, take-home pay, and quarterly estimated payment.
100+ free calculators. Every result shows the formula. No account required.
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