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Per Diem Calculator

Maximum lodging and meal allowances for a trip from GSA’s fiscal 2027 rates, plus the IRS high-low rates for employers

Updated October 2026

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Per diem = lodging rate × nights + meals and incidentals (M&IE) for each day, with the first and last day at 75%. Using GSA’s fiscal 2027 rates, a 3-day trip to Chicago in October 2026 allows up to $694: $232 × 2 nights of lodging plus $69 + $92 + $69 of M&IE. Places without their own rate use the standard CONUS rate of $113 lodging and $68 M&IE. Employers using the IRS high-low method pay $329 a day in high-cost localities and $230 elsewhere (Notice 2026-60).

How Per Diem Is Calculated

GSA sets two allowances for each destination: a nightly lodging maximum, which can change by month, and a daily M&IE rate in one of five tiers ($68, $74, $80, $86 or $92). For a trip of D days: lodging = nightly rate × (D − 1) nights; M&IE = 75% of the daily rate on the first and last day plus the full rate for each day in between. Worked example: Chicago (Cook and Lake counties) in October 2026 has a $232 lodging rate and $92 M&IE. Three days give 2 × $232 = $464 for lodging and $69 + $92 + $69 = $230 for M&IE, $694 in total.

TripLodging per nightM&IE per dayLodging totalMaximum per diem
Chicago, IL, October, 3 days$232$92$464$694
Chicago, IL, January, 3 days$148$92$296$526
New York City, NY, September, 4 days$358$92$1,074$1,396
San Francisco, CA, March, 2 days$325$92$325$463
Seattle, WA, July, 5 days$255$92$1,020$1,434
Small town in Ohio (standard rate), May, 3 days$113$68$226$396

Rules: FY2027 Rates and the 75% Days

GSA’s fiscal year 2027 rates apply to travel from October 1, 2026 through September 30, 2027 in the continental United States (CONUS). The standard rate of $113 lodging and $68 M&IE covers any county without its own rate. Many cities have seasonal lodging rates, so the month matters: Chicago’s rate is $232 in October but $148 in January. M&IE for the first and last day of travel is 75% of the daily rate ($51 for the $68 tier, $69 for the $92 tier). The M&IE total covers breakfast, lunch and dinner plus incidentals, and GSA publishes the split for each tier (for $92: $23, $26, $38 and $5).

The IRS High-Low Method for Employers

Employers that pay per diem under an accountable plan can use the federal rate for each destination or the IRS high-low method: from October 1, 2026, $329 a day for travel to a high-cost locality and $230 for any other CONUS locality, of which $86 and $74 are treated as meals for the 50% meal deduction limit (IRS Notice 2026-60). High-cost localities, and the months they qualify, are listed in the notice; for example, Chicago is high-cost October 1 to November 30 and April 1 to September 30. The transportation-industry M&IE rate is $80 within CONUS, and the incidental-expenses-only rate is $5 a day.

What This Calculator Does Not Cover

It covers CONUS rates only, not Alaska, Hawaii, US territories or foreign travel, which have separate Defense and State Department rates. It does not deduct provided meals, compute lodging taxes, or apply agency travel policies, conference lodging allowances or actual-expense reimbursements. Self-employed people deduct actual lodging; they may use the M&IE rate for meals but not the lodging per diem. Check your employer’s travel policy or a tax professional for your situation.

Common Mistakes

Using last year’s rates. FY2027 rates apply to travel from October 1, 2026.

Counting lodging for every day. Lodging is per night: a 3-day trip has 2 nights.

Paying full M&IE on travel days. The first and last day are 75%.

Searching by the wrong county. Rates follow the county or city GSA lists; a suburb may fall under the city’s rate or the standard rate.

Frequently Asked Questions

What is the federal per diem rate for 2027?
For fiscal 2027 (October 1, 2026 to September 30, 2027), the standard CONUS rate is $113 a night for lodging and $68 a day for M&IE; about 300 destinations have higher rates.
How do I calculate per diem for a trip?
Multiply the lodging rate by the number of nights, then add M&IE: 75% of the daily rate for the first and last day and the full rate for days in between.
Why is the first and last day 75%?
GSA’s rules pay 75% of the M&IE rate on the day you leave and the day you return.
What is the IRS high-low per diem rate?
From October 1, 2026: $329 a day for high-cost localities and $230 for other places in the continental US, with $86 and $74 counted as meals (Notice 2026-60).
Is per diem taxable?
Generally not for employees reimbursed under an accountable plan at or below the federal rate who account for the time, place and purpose of the trip; amounts above the rate are wages. IRS Publication 463 explains the rules.
What does M&IE include?
Breakfast, lunch, dinner and incidental expenses such as tips to porters and hotel staff.
Do per diem rates change during the year?
The rates are set for the fiscal year, but many cities have different lodging rates by month or season.

How to Use This Calculator

  1. Choose the state — and type the city or county.
  2. Pick the month — within October 2026 to September 2027.
  3. Enter travel days — counting the first and last day.
  4. Choose GSA or high-low — and read the maximum allowance.
📚 Sources & References
  1. [1] U.S. General Services Administration. Per diem rates API, FY2027 CONUS lodging and M&IE rates (effective October 1, 2026). Retrieved Oct 22, 2026. open.gsa.gov
  2. [2] U.S. General Services Administration. Per diem rates lookup and M&IE breakdown (first and last day 75%), FY2027. Accessed Oct 2026. www.gsa.gov
  3. [3] IRS. Notice 2026-60, 2026-2027 Special Per Diem Rates (high-low $329 / $230), effective October 1, 2026. www.irs.gov
  4. [4] IRS. Publication 463, Travel, Gift, and Car Expenses (per diem and accountable plans; standard meal allowance), 2025. Accessed Oct 2026. www.irs.gov
✅ Editorial Standards — Every calculator is built from peer-reviewed formulas and official data sources, editorially reviewed for accuracy, and updated regularly. Read our full methodology · About the author