How to Write a Travel and Expense (T&E) Policy
A travel and expense policy is the written rulebook governing what employees may spend on company business, how they book it, what documentation they owe, and how they get reimbursed. A good one is short, specific, and enforced by the systems people already use.
Most finance leaders arriving at this task want a structure they can adapt and publish this week, plus a realistic answer to the question of how to make anyone follow it. This covers the structure section by section, then the enforcement layer.
Key Takeaways
Nine sections cover a complete T&E policy. Anything beyond that tends to be detail that belongs in a booking guide rather than in policy.
The per diem versus actuals decision shapes more of the policy than any other single choice, including how much receipt work your team inherits.
IRS accountable-plan rules determine whether reimbursements are excluded from wages. Getting substantiation wrong turns reimbursements into taxable compensation.
A policy enforced by card controls beats a policy enforced by review, because the control refuses the transaction rather than adjudicating it afterward.
Set an annual review date in the policy itself. Policies without one go stale in about eighteen months.
What is a travel and expense policy, and why does your company need one?
A T&E policy sets the rules for business travel and employee-incurred expenses, regardless of how those expenses get paid. It covers booking and spending limits at one end, and documentation, approvals, and reimbursement at the other.
Three things make it worth writing properly rather than inheriting from a template nobody adapted. It controls a genuinely large cost category. It establishes the substantiation record that IRS accountable-plan treatment depends on. And it settles arguments in advance, which is most of what a policy is actually for.
The cost side is real at any size. Global business-travel spending returned to roughly $1.5 trillion in 2024, according to the Global Business Travel Association's Business Travel Index Outlook. Whatever share of that lands on your P&L, it's a category where policy choices move the number directly.
The control side matters too. The median loss from occupational fraud was $145,000, and expense-reimbursement schemes are a recurring form of asset misappropriation, according to the Association of Certified Fraud Examiners' Occupational Fraud 2024: A Report to the Nations. Most expense fraud is small, repeated, and enabled by a policy that never defined what a receipt has to show.
This piece stays on building the policy. The wider discipline sits in the complete guide to expense management, and there's no need to re-read that to use this.
What does T&E stand for, and what does it cover?
T&E stands for travel and expense, sometimes travel and entertainment. In practice the policy covers the obvious categories:
Airfare, lodging, and ground transportation
Meals, and mileage on personal vehicles
Conference and training fees
Client entertainment where permitted
Incidentals such as baggage fees and internet access
It also has to address two populations people forget. Non-employee travelers such as contractors, candidates, and board members need rules even though they aren't on payroll. And employees who travel rarely need a version of the policy they can read in five minutes, because they won't read a twenty-page document for one trip a year.
How is a T&E policy different from a card spend policy?
A card spend policy governs what a company card may be used for, with limits, merchant categories, and approval thresholds. A T&E policy governs travel and expense behavior regardless of payment method, including out-of-pocket spend the employee fronts.
They overlap and they aren't substitutes. Card controls and corporate card spend policies are one enforcement mechanism inside the broader T&E policy. A company with excellent card controls and no T&E policy still has no rule about booking class or per diem, and a company with a beautiful T&E policy and no card controls has no way to enforce it at the point of purchase.
What should be included in a travel and expense policy?
Nine sections, in this order. Each one answers a question people will otherwise ask you individually.
Section | What it settles |
1. Purpose and scope | Who the policy covers, including contractors and non-employee travelers |
2. Allowable and prohibited expenses | What the company pays for and what it never pays for |
3. Spending limits and per diems | Dollar caps by category, and whether meals run on per diem or actuals |
4. Booking rules | Advance-booking windows, class of travel, preferred vendors or tools |
5. Documentation and receipts | Receipt thresholds, what a receipt must show, and submission deadlines |
6. Approval workflow | Who approves what, at which thresholds, and who approves the approvers |
7. Reimbursement rules | How to submit, how fast reimbursement arrives, and what's excluded |
8. Non-compliance | What happens when the rules are broken, in escalating order |
9. Acknowledgment and review | Who signs, and the date the policy gets reviewed next |
Write each section to be read by someone standing in an airport. Short sentences, specific numbers, and a named person or role to contact when the situation isn't covered. A policy that says "reasonable expenses will be reimbursed" has settled nothing and will generate a dispute per trip.
A few specifics worth getting right in section two. Name the prohibited items explicitly rather than implying them, because the gray areas are where the arguments live. Alcohol, upgrades, spouse travel, traffic fines, and personal side trips are the usual list. Being explicit is kinder than being vague, since it tells people where the line is before they cross it.
How should you handle per diems and meal allowances?
Decide between per diem and actuals early, because everything downstream changes with that choice. Per diem pays a fixed daily amount regardless of what was spent and requires no meal receipts. Actuals reimburse what was actually spent against receipts, up to a cap.
Per diem removes an enormous amount of receipt-chasing and makes the cost predictable. Actuals control spending more tightly on expensive trips and generate substantially more paperwork. Most mid-market companies land on per diem for meals and actuals for lodging and airfare, which is a reasonable default.
The federal rates are the standard neutral benchmark. The FY 2026 standard CONUS per diem is $178 a day, made up of $110 for lodging plus $68 for meals and incidentals, effective October 1, 2025 through September 30, 2026, with M&IE tiers topping out at $92, according to the U.S. General Services Administration's Per Diem Bulletin FTR 26-01. Companies commonly adopt the GSA rates directly, which has the advantage of being defensible and requiring no annual negotiation.
Mileage follows the same pattern. The IRS publishes a standard mileage rate for business use annually, set at 70 cents per mile for 2025, and adopting it removes another recurring argument. Update the figure in your policy each January rather than leaving a stale number in the document.
What are the documentation and receipt requirements?
Set a receipt threshold, define what a receipt must show, and set a submission deadline. Those three decisions cover most of what goes wrong.
Federal substantiation rules require documentary evidence for lodging while traveling away from home and for other expenditures at or above a defined threshold, and a receipt counts when it establishes the amount, date, place, and essential character of the expense. Many companies set their internal threshold lower than the federal one, on the reasoning that a rule employees can remember beats a rule that's technically minimal.
The submission deadline matters more than people expect. IRS accountable-plan treatment depends on business connection, adequate substantiation, and return of any excess within a reasonable period, as described in IRS Publication 463 and Topic No. 511. Reimbursements that fail those tests become wages, with payroll tax consequences on both sides. A sixty-day submission rule is common and defensible.
What happens to a genuinely lost receipt should be in the policy too. A contemporaneous written record plus the card statement line is the standard fallback, and the policy should say how often that's acceptable before it becomes a pattern worth reviewing. How employee expense reimbursement works covers the mechanics downstream of submission.
How do you roll out and enforce a T&E policy?
Publish it, get acknowledgment, and then move enforcement out of human review and into the systems where spending happens. The last part is the one that decides whether the policy holds.
The rollout itself is unglamorous and worth doing carefully:
Send the policy with a short summary of what changed, not just the document.
Collect acknowledgment from every employee who travels, and keep the record.
Run a fifteen-minute session for managers who approve expenses, because they're the ones who'll be asked to interpret it.
Give people a named contact for situations the policy doesn't cover.
Set the review date in the document and put it on someone's calendar.
Then automate what you can. Card-level limits stop an over-threshold purchase at authorization rather than flagging it three weeks later. Merchant-category restrictions block categories the policy prohibits. Receipt capture at the point of purchase removes the submission step entirely for card transactions, which is where why finance teams are eliminating expense reports starts to bite.
The prevention argument is straightforward when you look at the exposure. Roughly 80% of organizations were targets of payments fraud in 2023, according to the Association for Financial Professionals' 2024 Payments Fraud and Control Survey, and T&E is a recurring vector within that. A control that refuses a transaction is worth more than a review that catches it, and the review capacity is finite in a way the transaction volume isn't. Reducing fraud in the T&E process covers the specific schemes.
Policy-compliant spend also has to reach the books cleanly. Corpay maintains 100+ ERP integrations, including NetSuite, Sage Intacct, Business Central, and Acumatica, so categorized T&E transactions and their documentation sync into the general ledger with the audit trail attached rather than being rekeyed at month end. The Sage Intacct AP automation breakdown shows what that connection looks like in one system.
Consolidating card programs helps here in a way that's easy to miss. Running AP, T&E, and purchasing on a single card program means one control framework instead of three, and what a business expense card is covers the instrument employees actually carry. The wider framing sits in what spend management is and how it works.
What happens when employees don't follow the policy?
Write a consequence ladder and then rely on it rarely, because most violations should be prevented rather than punished. A workable ladder starts with a coaching conversation on a first minor violation, moves to denial of reimbursement for the non-compliant amount, then a documented warning, and finally disciplinary action for repeated or deliberate abuse.
The part worth spending policy language on is the difference between a mistake and a pattern. Somebody who books a non-refundable fare outside the advance window once has made a mistake. Somebody who does it monthly has a habit your booking rules are failing to address, and the fix is usually the rule rather than the person.
One thing I'd push on from having watched several of these rollouts. Track denied reimbursements by reason for the first six months. The reason codes tell you which policy sections are unclear far faster than any survey will, and they usually point at two or three sentences rather than at the employees.
Enforce your T&E policy with Corpay
A written policy is a starting point. What makes it hold is control at the moment of spend.
Corpay commercial cards put the policy into the card itself, with per-card and per-transaction limits, merchant-category restrictions, and approval routing that runs in real time rather than at month end. An out-of-policy purchase gets declined instead of debated, which removes the most tiring conversation in expense management.
Documentation arrives attached to the transaction rather than chased afterward, coded to your general ledger and ready for reconciliation. Customers see about 40% time saved on the cycle, and implementations go live in weeks rather than quarters.
We're an ERP complement rather than a replacement, and the AP automation integrations page covers how compliant spend flows into the system of record. For teams already running cards on T&E, simplifying travel and entertainment expenses with a Corpay card covers what that looks like day to day.
Frequently Asked Questions
What is a T&E policy?
A travel and expense policy is a written document setting the rules for business travel and employee-incurred expenses, covering what's allowable, what limits apply, what documentation is required, who approves what, and how reimbursement works. It applies regardless of payment method.
What should a T&E policy include?
Nine sections cover it, running from purpose and scope through allowable and prohibited expenses, spending limits and per diems, booking rules, documentation and receipts, approval workflow, reimbursement rules, non-compliance consequences, and acknowledgment with a review date.
How do you write a T&E policy?
Start from the nine-section structure, fill each section with specific numbers rather than adjectives, decide per diem versus actuals early, and set a receipt threshold and submission deadline. Then get acknowledgment from every traveler and configure card controls to enforce the limits automatically.
What are per diem rates?
Per diem is a fixed daily allowance covering lodging, meals, and incidentals instead of reimbursing actual amounts. The FY 2026 standard CONUS rate, published by the General Services Administration and widely adopted by private employers, splits a fixed daily figure between lodging and meals and incidentals.
What expenses are reimbursable under a T&E policy?
Whatever the policy names as allowable, which typically covers airfare, lodging, ground transport, meals, and mileage. Prohibited items usually include alcohol beyond defined limits, upgrades, spouse travel, and fines. Write both lists explicitly.
Do reimbursements count as taxable income?
Not under a properly operated accountable plan. IRS rules require a business connection, adequate substantiation, and return of any excess within a reasonable period. Reimbursements that fail those tests are treated as wages, so the substantiation rules in your policy carry tax consequences.
How do you enforce a travel and expense policy?
Through controls at the point of spend rather than review afterward. Card-level limits and merchant-category restrictions prevent out-of-policy transactions, receipt capture removes the submission step, and exception flagging surfaces the small number of cases that genuinely need a human decision.
How often should a T&E policy be reviewed?
Annually, with the review date written into the policy itself. Per diem and mileage rates change every year, travel patterns shift, and a policy with no scheduled review tends to go stale within about eighteen months without anyone noticing.
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