Assigning the correct category to an expense is not just an administrative task, it directly impacts reporting accuracy and decision-making. A structured, thoughtful approach reduces errors, rework, and follow‑up questions.

When assigning an expense, start by asking a simple question: What was this expense for? The purpose of the expense should guide the category selection.

Key principles to follow:

• Always follow the client’s established categories and processes
• Be consistent, similar expenses should always go under the same category
• Avoid overusing “Miscellaneous”; use it only when no suitable option exists
• Add clear, descriptive notes when an expense could be unclear
• Split expenses when a single receipt covers multiple categories

If you are unsure, refer to the client’s documentation or ask for clarification rather than guessing.

“Never hope it passes” rule (non‑negotiable)

If anything looks unusual (such as an unclear merchant name, odd VAT or tax, a possible duplicate, a mismatched total, or an unclear purpose) do not guess and do not submit the expense quietly. Flag the issue early, provide context, and recommend a clear next step.

Quick audit‑ready checks (before finalising the category):

• Can you clearly explain the purpose in one short line? (“What was this for?”)
• Does the receipt total match the amount logged?
• Is the currency correct (and has conversion been handled if required)?
• Are you using the client’s category names or codes, not your own?

Correct expense categorisation relies on understanding purpose, validating details, applying consistency, and respecting client preferences. These habits create reliable, professional expense records and build client trust over time.