What is the difference between an estimate, an invoice, and a work receipt?
Short answer
An estimate says what you expect the job to cost before you start. An invoice asks the customer to pay for work that is done. A work receipt (or job completion report) documents what was actually done, with photos and a summary. Used together, the estimate sets expectations, the report proves the work, and the invoice collects payment.
How they fit together
- Estimate: before the job. Scope and expected price. The customer accepts it.
- Work receipt or report: after the job. What was done, with photos. The customer acknowledges it.
- Invoice: after the job. The amount owed and how to pay.
Why the middle one matters
Many small businesses jump from estimate straight to invoice. The report in between is what answers the customer's question "what exactly am I paying for?" before they ask it.
Related questions
Is an estimate a binding quote?
Not necessarily. An estimate is your best expectation; a quote or fixed-price agreement commits you to a number. Say which one you are giving, and state what would change the price.
Can one document serve all three purposes?
You can combine them, but separate documents are clearer. A report customers can open on their phone, plus a payable invoice link, keeps proof and payment distinct.
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Last reviewed 2026-10-20. This is general information for service businesses, not legal, tax, or financial advice.