Per Diem Reimbursement Guide

Per diem is a policy-based approach organizations may use to provide a defined amount for eligible travel expenses, commonly for specified daily costs. It differs from repaying every actual meal or incidental purchase individually, though travel programs can combine approaches for different expense types. Exact coverage, rates, eligibility, and documentation depend on the organization's policy and applicable requirements; no single figure or rule works for every trip.

Decide what the per diem covers

A policy should name the expense categories included, such as meals or incidentals, and explain which costs still require actual receipts or separate claims. State how the organization handles lodging, hosted meals, partial travel days, travel interruptions, and expenses paid directly by the company. This prevents employees from assuming that every travel cost is covered by a daily amount or submitting the same item under both per diem and actual-expense rules.

Define eligibility and calculation rules

Specify what qualifies as business travel, how eligible days are determined, and what source establishes any location-specific or time-sensitive amount. Identify an effective date and who maintains changes. Explain how the method applies when an employer pays some costs directly, an employee attends a hosted meal, or a trip changes unexpectedly. Avoid publishing a rate without its scope, source, and applicable period.

• Confirm the trip and employee meet the policy's eligibility criteria.
• Record destination, travel dates, business purpose, and any required approval.
• Identify the covered categories and the applicable policy amount or method.
• Subtract or adjust costs only as the policy directs, documenting the reason.
• Submit actual-cost items separately when the policy requires them.

Help reviewers apply the same rule

Reviewers should verify the trip details, eligibility, and calculation method rather than judging expenses based on personal preference. Finance should check that the claim does not duplicate directly paid costs or separate actual-expense submissions. If an employee has a special circumstance, route it through a documented exception decision instead of improvising a one-off calculation that cannot be explained later.

Choose between per diem and actual expenses

Per diem can make some trip costs easier to budget and administer, while actual-expense reimbursement ties payment to documented transactions. The tradeoff includes predictability, evidence, employee flexibility, policy complexity, and accounting needs. A blended approach may be used when clear categories separate the two methods. Compare the alternatives in per diem vs actual expenses and align the decision with the corporate travel expense policy.

Give employees a usable reference

Provide a short pre-trip checklist, explain what evidence to retain, and show examples of common cases without implying rules the organization has not adopted. Tell travelers where to ask questions before departing, since an early answer is easier to apply than a correction after a trip.