Mileage and subsistence grey areas UK reviewers keep testing

Mileage and subsistence create more exceptions than almost any other claim type. Ordinary commuting versus business travel, overnight rates versus day rates, and client meals versus staff celebrations all sit in grey zones if the policy is silent.

Write decision trees with real examples from your last quarter, not abstract principles. Include who may approve exceptions and what evidence is required — diary invite, client name, or journey purpose.

HMRC-aligned rates help, but internal policy still needs to say when a claim is out of scope. Reviewers test consistency more than generosity.

If your exception log is longer than your approved claim list for these categories, fix the rules before the next sample.

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