Reimbursable Expenses on an Invoice: What to Include and How to Show Them

Short answer

Show reimbursable expenses as separate invoice line items, use clear descriptions and dates, and attach receipts or an expense report when the customer needs proof. Keep service fees, taxes, and pass-through costs distinguishable so the customer can review the total quickly.

Only bill expenses that the contract or customer approval allows. Use the free invoice generator to create a clean PDF, then compare the expense lines with your agreement before sending.

What counts as a reimbursable expense?

Reimbursable expenses are costs you incur while delivering work that the customer agreed to repay. Examples include:

• Travel, mileage, accommodation, and meals approved for a project
• Materials or equipment purchased for the customer
• Third-party software or licenses bought for delivery
• Shipping, courier, printing, or permit fees
• Subcontractor costs approved by the customer

The contract may set limits, require pre-approval, or state whether tax and service charges are included. Check those rules before adding a cost.

How to list expenses on an invoice

Use a separate line for each meaningful cost or group related costs with enough detail:

• Travel to client site, August 4: 180 km at USD 0.75/km - USD 135
• Approved printing and binding for workshop materials - USD 86
• Project software license, August 1–31 - USD 49

Include the date, vendor, quantity, rate, or project reference when it helps the customer verify the expense. Avoid a single vague line such as miscellaneous costs.

Expense invoice example

A consulting invoice might show:

• Consulting services: 10 hours at USD 150 - USD 1,500
• Approved travel: 180 km at USD 0.75 - USD 135
• Workshop materials: 1 package at USD 86 - USD 86
• Subtotal: USD 1,721

If tax applies differently to services and expenses, show the categories separately and confirm the correct treatment for your jurisdiction.

Attach supporting records

Attach receipts, mileage logs, hotel invoices, or an expense report when the customer or contract requires them. The invoice should remain readable even when supporting documents are separate.

Use the invoice number in the expense report filename so the records can be matched later. Good invoice record keeping helps when a customer asks about a cost after payment.

Expenses, markup, and tax

A reimbursable expense can be billed at cost, with an agreed markup, or under a fixed allowance. State the arrangement before the expense is incurred. Do not add a markup silently.

Tax treatment can depend on the expense, location, and whether you are acting as a principal or agent. If VAT or GST applies, review the VAT and GST invoice comparison and confirm the exact local rule.

When to bill expenses

You can bill approved expenses with the next regular invoice, at a project milestone, or immediately after a large purchase. For recurring work, include the service period and expense date. The recurring invoice workflow explains how to keep each billing period separate.

If the customer paid a deposit, show how approved expenses affect the remaining balance. Do not change the original deposit invoice to hide later costs; reference the related documents instead.

FAQ

Should expenses be included in the service subtotal?

Usually show them as separate lines or sections. This makes the service fee, expense reimbursement, tax, and total easier to review.

Can I invoice an expense without a receipt?

Only when the agreement and local record requirements allow it. If proof is expected, obtain and keep the receipt or other supporting record.

Can I charge tax on reimbursed expenses?

It depends on the transaction and local tax rules. Do not assume that every reimbursed cost has the same treatment as your main service.