Quotation vs. Invoice: What’s the Difference?
If you run a service business — whether air conditioning repair, photography, electrical contracting, or event design — confusing quotations with invoices is one of the most common causes of client disputes and delayed payments. Here is what every service provider needs to know.
The 10-Second Summary
- A Quotation is sent before work begins to confirm scope and price. It requires client acceptance.
- An Invoice is sent after work is done to demand payment. It is an accounting and tax document.
- Starting work without an accepted quotation leaves you vulnerable to scope creep and unpaid invoices.
1. What is a Quotation?
A quotation (or quote) is a formal document given by a seller or service provider to a prospective client. It details the exact services to be provided, the cost breakdown (line items, quantities, rates), and any specific terms or expiration date.
When a client approves a quotation, both parties enter into an agreement: the client knows precisely how much they will pay, and the contractor knows precisely what work is expected.
2. What is an Invoice?
An invoice is an official billing document issued after the service has been performed or goods delivered. It states the total amount owed, payment methods, bank accounts, due dates, and applicable taxes.
Invoices are legally required for business accounting, expense tracking, and government tax reporting (such as BIR compliance in the Philippines or tax authorities worldwide).
Side-by-Side Comparison
| Feature | Quotation | Invoice |
|---|---|---|
| Timing | Sent BEFORE work begins, while scope and pricing are being agreed upon. | Sent AFTER work is completed (or milestone reached) to request payment. |
| Primary Purpose | Offers clear pricing and terms for client approval, locking in the commitment. | Requests actual payment and serves as an accounting / billing record. |
| Client Action | Client reviews and accepts or declines the offer (agreeing on the price). | Client remits payment based on the agreed terms. |
| Negotiation / Edits | Can be revised and updated until the client confirms acceptance. | Finalized billing document; adjustments usually require credit notes. |
| Tax / Accounting | Not a tax document or official receipt. It represents an agreed quote. | Forms part of accounting records and tax filings (e.g. BIR, IRS). |
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Frequently Asked Questions
Is a quotation legally binding once accepted?
When a service provider offers a quotation with specific scope and pricing, and the client formally accepts it, it constitutes a binding mutual agreement on price and deliverables. However, a quotation is not an invoice or official receipt.
Can a quotation replace an invoice?
No. A quotation sets expectations and locks in client approval before work starts. An invoice or official receipt is issued after work is completed for formal billing and tax accounting purposes.
Does Bilyo generate invoices?
No. Bilyo is exclusively an online quotation maker built to turn estimates into confirmed sales. Bilyo does not generate tax invoices, billing statements, or official receipts, and every Bilyo document clearly states so.