Policies & Approvals

Per Diem Policy Guide

Learn how to structure an internal per diem policy, define covered travel circumstances, and document decisions. The guide distinguishes policy design from rates and tax treatment that require current verification.

By Remizen Editorial · · 3 min read

A per diem policy describes an organization’s approach to a defined travel allowance or daily expense method. The term alone does not tell an employee which costs are covered, which trips qualify, or what records are needed. The organization must decide those points, verify applicable requirements, and explain how its chosen method works alongside actual-expense reimbursement and travel approval.

Define when the policy applies

Begin by stating which employees and business trips are covered and what conditions trigger the method. Explain how trip dates, partial days, overnight travel, extended stays, and canceled plans are handled under the organization’s rules. Identify which categories the allowance is intended to address and which costs remain separately reportable. Avoid using a single label to cover different expenses without defining the boundary.

  • State eligibility conditions and who approves the trip.
  • Identify included costs and items handled separately.
  • Explain how start, end, partial, and changed travel days are treated.
  • Describe required trip records and how the claim is submitted.

Set parameters through a controlled process

If the organization sets daily amounts or location-based parameters, name the owner, source, review cadence, and effective date. Rates and tax treatment may vary with jurisdiction and facts, so have appropriate specialists verify current requirements. Do not embed an unreviewed amount in a permanent document. Employees and approvers need a clear way to find the applicable current value and know which trip dates it covers.

Explain whether employees submit actual receipts for costs covered by the method, and what evidence is still needed to establish travel purpose and dates. Address situations such as meals supplied by a host, a conference package, or a personal extension. Specify how to disclose these circumstances and who decides whether an adjustment applies. This prevents employees from inferring a rule from an incomplete example.

Coordinate the policy with travel and reimbursement review

Travel approval confirms the business trip; the per diem process determines how eligible costs are handled under the selected method. Finance should be able to trace a claim to the trip, dates, applicable parameter, and approval. Managers should know when to approve the business purpose and when a question requires finance or policy-owner review. Define a correction path for missing dates or changed itineraries.

  • Use an example with dates and clearly stated assumptions.
  • Link the current parameter source rather than copying an aging rate.
  • Explain the interaction with actual expenses and corporate cards.
  • Review the policy whenever authoritative guidance or internal methods change.

A thoughtful per diem policy gives travelers an understandable method before departure and gives reviewers a consistent audit trail afterward. Keep it aligned with the corporate travel expense policy and employee reimbursement policy, and route jurisdiction-specific questions to qualified internal or external advisers.

  • Corporate Travel Expense Policy

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  • Per Diem Reimbursement Guide

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  • Employee Reimbursement Policy Template

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