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Quote vs invoice vs receipt: the difference, with SA examples
Three documents, one job. Mix them up and you either scare off a customer (invoicing before they've agreed), or you don't get paid (quoting and never invoicing). Here's the clean version.
The one-line answers
| Document | What it says | When it goes out |
|---|---|---|
| Quote | "This is what it will cost." | Before any work starts |
| Invoice | "This is what you now owe." | The moment the work is done / goods delivered |
| Receipt | "You have paid." | After the money lands |
The quote: your protection, not just a price
A quote is an offer, and once accepted it's the basis of your agreement. Three things belong on every quote precisely because of that:
- A validity period — "valid for 14 days". Materials prices move; don't be held to March prices in July.
- What's excluded — "excludes electrical work", "excludes rubble removal". The argument you prevent is worth more than the line it takes.
- A quote number — so the eventual invoice can say "as per quote Q-0031" and nobody disputes the amount.
Under the Consumer Protection Act, consumers are entitled to know the price before work begins. A written, accepted quote is how you make a price increase defensible — or avoid the fight entirely.
The invoice: send it the same day
The single biggest cash-flow mistake in small business isn't late payers — it's late invoicers. The payment clock only starts when the invoice arrives. Finish the job Tuesday, invoice Tuesday. It must carry its own sequential number, the date, line items and banking details — the full requirements are in our SARS invoice checklist.
For bigger jobs, deposits and progress payments each get their own numbered invoice ("50% deposit as per quote Q-0031"). Never treat a deposit as an informal side-arrangement — it's income, and it's the part most often disputed.
The receipt: small document, big trust
An invoice asks; a receipt confirms. For EFT payments, the customer's proof of payment plus a short acknowledgement ("Payment received for INV-0043, thank you") does the job. For cash — always issue a receipt, for their protection and yours.
Turning a quote into an invoice without retyping
The classic failure: the quote lives in a WhatsApp message, the job changes twice, and the final invoice is typed from memory — for a different amount than anyone remembers agreeing to. The fix is making the quote and invoice the same data. In WhatInvoice you send the line items once as a quote; when the customer accepts, one message converts it to a numbered invoice — same lines, same prices, no retyping. (More on that flow: invoicing from WhatsApp.)
Common questions
Is a quote legally binding?
Once accepted, it generally forms your agreement — state a validity period and exclusions.
Can an invoice double as a receipt?
No. Invoice = amount owed; receipt = amount paid. For EFT, proof of payment + acknowledgement covers it.
Invoice before or after the job?
Immediately after (or per milestone). Every day you don't invoice extends the wait for your money.
Quote → invoice in one message
Send line items once. Quote goes out; on acceptance it becomes a numbered invoice — no retyping, no disputed amounts. Free to start.
Try WhatInvoice free