--- title: "Travel budget" description: "A travel budget is a company's planned spend on business travel by category. What goes in one, how per diem rates fit and how to build it in five steps." canonical: https://engine.com/glossary/travel-budget updated: 2026-11-02 author: "Engine Editorial" --- # Travel budget A travel budget is a company's planned spend on business travel, broken into categories like flights, lodging, meals, ground transportation and incidentals, for one trip or a longer period. Also called: business travel budget, corporate travel budget Not to be confused with: a per diem, the daily allowance inside it Updated November 2, 2026 by Engine Editorial ## What is a travel budget? A travel budget is the number a company plans to spend on business travel, split by category. This cheat sheet covers how to think about one and how to build it. The detail is further down. ### How to think about it - **Budget by category.** Flights (airfare, taxes, baggage fees), lodging (room charges, service fees, parking), meals, ground transportation, insurance and incidentals like laundry and tips. - **Per diem covers the daily costs.** A daily allowance for meals and small costs sets a spending limit per day, which keeps travelers inside the budget. - **Federal rates are a starting point.** GSA sets the per diem rates federal agencies use for lodging and meals and incidentals in the continental US. A standard rate covers most of it, with separate rates for about 300 non-standard areas. - **Compare the estimate to the actuals.** After the trip, the expense report shows actual spending against the estimate, and where a category was over or under-funded. ### How to build a travel budget 1. **Estimate.** Research costs and review past expense reports. Count the trip length, airfare, lodging, meals, ground transportation, conference fees, visas, insurance and incidentals. 2. **Adjust for demand.** Account for the destination's popularity, peak season, accommodation demand and weather risks. 3. **Find savings.** Look at booking ahead, public transit where schedules allow, loyalty programs and flexible fares. 4. **Draft with a reserve.** Check the draft against the company travel policy and add a reserve fund for lost luggage, damaged equipment and other surprises. 5. **Review and submit.** Have another travel manager review it, then submit it for approval. ## How it works on Engine Engine [travel policies](https://engine.com/features/travel-policy-enforcement) can set flat or tiered nightly rate caps, location-based rate limits, flight cost and cabin-class limits, and daily rental-car caps. Each policy can apply to all members, individual members or departments, and an out-of-policy booking can be blocked, allowed with a reason or allowed with approval. Company fields like project, job code and cost center carry into [reporting](https://engine.com/features/travel-reporting-analytics), so travel spend can be filtered by project or department. ## Put the budget into the booking flow Set nightly rate caps by location, flight cost limits and daily rental-car caps on Engine, and choose what happens when a booking goes over. Free to use. [Get started](https://engine.com/sign-up) ## Questions ### What should a business travel budget include? Flights, lodging, meals, ground transportation, insurance and incidentals. For a single trip, also note the dates and how long the employee will be away. ### What is a per diem allowance? A fixed amount of daily reimbursement an employer gives for lodging and meals and incidental expenses (M&IE) when an employee is away from home on business. ### Where can I find per diem rates for a city? GSA publishes per diem rates you can look up by city, state or ZIP code. If a location isn't listed, the standard CONUS rate applies, which covers about 85% of counties in the continental US. ### Should a travel budget include a reserve? Yes. Lost luggage, stolen credit cards and damaged equipment happen, and a reserve fund in the budget cushions those emergencies. ## Go deeper - [How to create a travel budget, with template](https://engine.com/blog/travel-budget-template) - [Engine travel policy enforcement](https://engine.com/features/travel-policy-enforcement) - [Per diem](https://engine.com/glossary/per-diem) - [Travel and expense (T&E)](https://engine.com/glossary/travel-and-expense) ## Sources 1. Engine, "How to create a travel budget: Quick guide with template," https://engine.com/blog/travel-budget-template, accessed November 2, 2026. 2. U.S. General Services Administration, "Per diem rates," https://www.gsa.gov/travel/plan-book/per-diem-rates, accessed November 2, 2026. 3. U.S. General Services Administration, "Frequently asked questions, per diem," https://www.gsa.gov/travel/per-diem-rates/faqs, accessed November 2, 2026. 4. Internal Revenue Service, "Publication 463 (2025), Travel, Gift, and Car Expenses," https://www.irs.gov/publications/p463, accessed November 2, 2026. 5. Engine, "Company Travel Policy Enforcement," https://engine.com/features/travel-policy-enforcement, accessed November 2, 2026. 6. Engine, "Travel Reporting and Analytics," https://engine.com/features/travel-reporting-analytics, accessed November 2, 2026.