How this deduction calculator works
This tool estimates federal standard mileage method deductions. It multiplies eligible miles by the IRS rate for the selected year and purpose, then adjusts for optional parking/toll amounts and reimbursements you already received.
If you keep trip-level records, use the built-in log and export the file so your deduction worksheet and supporting records stay aligned.
For a full walkthrough of formulas, year-by-year rates, and documentation best practices, read our Mileage Deduction Calculator (2026) guide.
IRS mileage rates by tax year
The calculator supports recent IRS rates and applies the correct value when you change year or purpose.
| Tax Year | Business | Medical | Moving* | Charity |
|---|---|---|---|---|
| Rate table loading... | ||||
*Moving mileage is generally limited to qualified active-duty Armed Forces moves under current federal law.
IRS-proof assumptions and records
Business mileage generally requires a contemporaneous record including date, business purpose, and miles.
- Keep a contemporaneous trip log: date, destination, business/medical/charity purpose, and miles.
- Retain supporting documentation for parking and tolls if included.
- Use one consistent methodology for your annual totals and reconcile exports with your return workpapers.
- This calculator does not prepare tax forms and does not replace professional tax advice.
Frequently Asked Questions
What is the 2026 IRS business mileage rate?
The 2026 standard business mileage rate used by this calculator is 72.5 cents per mile.
Can I add parking and tolls on top of the mileage method?
For qualifying situations, parking and tolls can generally be tracked separately and included in your total deduction estimate. Keep receipts and records.
How does reimbursement affect deduction estimates?
Reimbursement usually reduces what remains deductible. This tool subtracts reimbursement from gross estimated deduction to show a net estimate.
Why keep a trip log if I already know my annual miles?
Trip-level records strengthen substantiation in case of review and make it easier to reconcile totals by purpose.
Does this calculator cover state tax rules?
No. It estimates federal standard mileage method values only. State treatment may differ.