Per diem & mileage,
calculated correctly.
The free calculator that turns the official GSA FY2026lodging & M&IE rates into an itemised trip total — the 75% first-and-last-day rule built in — plus IRS-rate mileage. Real government data, not a guess.
- 298
- GSA cities
- 51
- states + DC
- $178
- standard / day
Pick your travel dates to see the itemised per diem.
Saved trips
Save a calculated trip and it'll stay here on this device — handy for recurring routes and expense reports.
Built the way a travel voucher actually adds up
Three rules trip people up when they do this by hand. PerDiemWise applies all three, every time.
Lodging, per night
Each night is capped at that city's GSA rate for the month it falls in — seasonal rates handled automatically.
M&IE at 75% on travel days
Meals & incidentals pay full on whole days and 75% on the first and last day, with provided meals deducted.
Mileage at the IRS rate
Personal-vehicle miles reimbursed at the 2026 IRS rate of 72.5¢ — in the same place.
The official rate, without the manual maths
| Capability | PerDiemWise | gsa.gov lookup | Spreadsheet |
|---|---|---|---|
| Official GSA FY2026 rates | ✓ | ✓ | — |
| 75% first & last-day rule, automatic | ✓ | — | — |
| Per-night seasonal lodging | ✓ | — | — |
| Provided-meal deductions | ✓ | — | — |
| IRS mileage in the same place | ✓ | — | — |
| Itemised, copy-ready breakdown | ✓ | — | — |
| Save & reuse trips | ✓ | — | ✓ |
Reimburse miles at the exact 2026 IRS rate
Business, medical or charitable, multi-leg — totalled to the cent and ready for an expense report. No more looking up this year's cents-per-mile.
Open the mileage calculatorDriving for work — the most common reimbursement rate.
Popular destinations
Per diem, answered
What is the standard per diem rate for 2026?+
For FY2026 the standard CONUS per diem is $110 for lodging and $68 for meals & incidentals — $178 a day combined. Higher-cost cities have their own GSA rates.
How is per diem calculated on travel days?+
Meals & incidentals (M&IE) are paid at 75% on your first and last day of travel and 100% on each full day in between. Lodging is paid per night for each overnight stay, at the rate for that month.
What is the 2026 IRS mileage rate?+
The 2026 IRS standard mileage rate is 72.5¢ per mile for business, 20.5¢ for medical or moving, and 14¢ for charitable driving.
Is per diem taxable?+
Per diem within the federal rate and backed by an expense report is not taxable. Amounts above the federal rate, or paid without substantiation, become taxable income.
Your next trip's per diem is two dates away
Official GSA FY2026 rates, itemised and copy-ready. No sign-up needed to calculate.