Where are you going?

For CONUS trips, enter a ZIP and use GSA lookup. For OCONUS, use the OCONUS page and enter the authorized rates from your orders or DoD source.

Destination ZIP Fiscal year Rate month

No rate loaded yet.

2

How long are you going?

Use the departure and return dates from the orders. The calculator counts first and last days as travel days.

Depart date Return date Long TDY rule

3

What did the trip authorize?

Leave unknown items blank. If actual lodging is blank, the estimate assumes the authorized lodging cap.

Lodging cap per night M&IE per day Actual lodging per night Lodging tax or fees per night Other reimbursable expenses Advance percent

4

Were meals provided?

Only count meals provided on full TDY days. First and last travel days use the travel-day percentage.

Breakfast deduction Lunch deduction Dinner deduction Incidentals floor Travel-day M&IE percent Breakfasts provided Lunches provided Dinners provided

How we do it

Simple inputs, traceable math, official references.

CONUS rates are requested from the GSA Per Diem API by ZIP, fiscal year, and month. OCONUS trips are manual because foreign nation rates depend on DoD tables, currency, locality, and orders-specific authorization.

1. Count the trip.

Departure and return dates create total days, lodging nights, first/last travel days, and full TDY days.

2. Apply rates.

Lodging is capped by the daily lodging rate. M&IE is split into travel days and full days.

3. Deduct meals.

Provided meals reduce full-day M&IE using the breakfast, lunch, and dinner amounts entered or loaded from GSA.

4. Produce a report.

The report shows lodging, M&IE, deductions, taxes or fees, other expenses, over-cap lodging, and suggested advance.

This calculator is not a government entitlement system. OCONUS, actual expense authorization, government quarters, unit policy, split disbursement, local vouchers, and travel office decisions can change the final amount.

Privacy Policy

Calculator data stays in your browser unless a rate lookup is requested.

MyPerDiem.us is a military TDY planning calculator. The trip details typed into the calculator are processed in your browser to create an estimate and downloadable report. If you use the CONUS GSA lookup button, the destination ZIP, fiscal year, and month are sent to this server so it can request the matching GSA rate.

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Rate lookups

GSA rate lookups are used only to retrieve public per diem data. The calculator does not ask for names, Social Security numbers, payment cards, orders, or travel voucher documents.

Downloads

Saved reports are generated locally by your browser. MyPerDiem.us does not store the report file after it is downloaded.

The site may receive ordinary server logs such as request time, URL, browser type, referring page, and IP-derived network information. These logs are used for security, abuse prevention, debugging, and uptime checks.

MyPerDiem.us is not intended for children and is not an official government website. For security reports, use the instructions at security-contact.txt.

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Terms and Disclaimer

Use this as a planning estimate, not as an entitlement decision.

MyPerDiem.us is a private planning tool for military TDY per diem estimates. It is not operated by GSA, DoD, DFAS, DTS, a finance office, or any other government agency.

Verify the final amount

Orders, JTR rules, DTS routing, unit policy, finance office review, government quarters, actual expense authorization, provided meals, and split disbursement can change the final reimbursement.

CONUS and OCONUS

CONUS rates may be loaded from GSA public data. OCONUS rates are manual because foreign nation locality rules, currency, and authorizations vary.

No financial advice

The calculator output is informational. Do not use it as legal, tax, accounting, financial, or entitlement advice.

Use responsibly

Do not use the service for illegal activity, destructive testing, scraping, or attempts to disrupt the site or its upstream data sources.

Always verify travel payments with your orders, DTS, JTR, DFAS guidance, and finance office before making spending decisions.

Terms and disclaimer.