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How to Set Up a Small Business Expense Policy

Write down what is reimbursable, set per-category spending limits, define the approval and submission process, and choose a reimbursement timeline. Keep it short — a one-page policy that employees understand beats a ten-page document nobody reads. Review it every six months and update limits based on actual spending.

Most small businesses do not have a written expense policy — and the ones that do often have a document so long and complex that nobody follows it. A good expense policy is short, clear, and focused on the decisions employees make every week: what can I expense, how much, and how do I get paid back? This guide walks through creating one in an afternoon.

Before you start

Your last three months of business expenses (to see what people actually spend on), a list of your employees who submit expenses, and a decision on whether you will use expense-management software or a simpler process.

Steps

  1. 1

    List what is and is not reimbursable

    Start with the obvious categories: travel, meals, accommodation, software, office supplies, professional development, client entertainment. For each, state clearly whether it is reimbursable, partially reimbursable (e.g., meals at 50%), or not reimbursable. The goal is to answer the most common employee question — "can I expense this?" — in writing, before they spend.

    💡 Be specific about grey areas: alcohol with meals, upgrades on flights, personal items bought on a business trip. Ambiguity here causes most disputes.

  2. 2

    Set per-category spending limits

    For each reimbursable category, set a per-transaction or per-day limit. Use your actual spending data as a guide — look at the last three months and set the limit at the 80th percentile, so most normal spending is covered without approval. Anything above the limit requires pre-approval.

    💡 Round numbers are easier to remember: "$50/day for meals" is clearer than "$47.50/day".

  3. 3

    Define the submission and approval process

    Write down how employees submit expenses (app, email, spreadsheet), what documentation they need (receipt required above $X), and who approves. For a team under 10 people, a single approver (the founder or office manager) is usually enough. For larger teams, set a manager-then-finance two-step.

  4. 4

    Choose a reimbursement timeline

    State how quickly expenses will be reimbursed — typically within 15 or 30 days of submission, or aligned with the next payroll run. A clear timeline prevents the "where is my money?" conversation and signals that expenses are taken seriously.

    💡 The most common timeline is "submitted by the 15th, paid by the end of the month." Pick a rhythm and stick to it.

  5. 5

    Set the receipt and documentation rules

    Require a receipt for any expense above a threshold — $25 is common. Below the threshold, a note describing the business purpose is enough. For mileage, define the rate (use the standard IRS or HMRC rate for your country) and require start and end odometer readings or a GPS log.

  6. 6

    Review and update every six months

    After six months, look at actual spending against the policy. Are limits too high (nobody is hitting them) or too low (everyone needs exceptions)? Are there categories you forgot? Update the policy and re-circulate it. A policy that is never reviewed becomes stale and ignored.

    💡 Ask employees for feedback — they know where the policy is confusing or unrealistic better than you do.

Common mistakes

  • Writing a ten-page policy that nobody reads — keep it to one page.
  • Setting limits without looking at actual spending data — limits become arbitrary.
  • Not defining the approval process clearly, so every expense becomes a conversation.
  • Requiring a receipt for every $5 coffee — set a sensible threshold below which a note suffices.
  • Never reviewing or updating the policy — it drifts away from reality.

Verdict

A good expense policy is short, specific, and reviewed regularly. Spend an afternoon writing a one-page policy: what is reimbursable, what the limits are, how to submit, and when you get paid back. Nika can help process expense receipts and supplier invoices from {price} per item, but the policy itself is a document only you can write.

Questions

How long should an expense policy be?

One page. If it is longer, employees will not read it. Cover: what is reimbursable, per-category limits, submission process, approval steps, and reimbursement timeline. Put the details (mileage rates, receipt thresholds) in a short appendix if needed.

Do I need expense-management software?

For a team under 5 people with fewer than 20 expenses a month, a simple process (email receipts to a dedicated address, track in a spreadsheet) is enough. Above that volume, tools like Expensify, Dext, or Zoho Expense save time. Nika can also process receipts and supplier invoices per item at {price}.

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