What Is a Proforma Invoice?
A proforma invoice is a preliminary bill or estimated quote that you send to a client before any work begins or goods are delivered. It outlines the exact scope of work, the estimated costs, and the terms of the agreement.
Despite having "invoice" in the name, a proforma invoice is not a legal demand for payment. It does not go into your accounting books as revenue, and your client cannot use it to claim tax deductions.
Why Freelancers Use Proforma Invoices
For freelancers, a proforma invoice is an excellent tool for setting expectations and securing deposits.
If a new client wants to hire you for a $5,000 website redesign, you do not want to start coding based on a vague email thread. Instead, you send a detailed proforma invoice outlining the project milestones and requesting a 50% upfront deposit. Once the client approves it and pays the deposit, you convert that proforma invoice into a real, legally binding commercial invoice for your accounting records.
What Is a Commercial Invoice?
A commercial invoice (often just called an "invoice") is the real deal. It is a formal, legally binding document issued after the services have been rendered or the goods have been delivered. It serves as an official request for payment.
When you send a commercial invoice, it becomes an account receivable in your bookkeeping software. It is a permanent record of the transaction and is fully binding. If you are ever audited by tax authorities, commercial invoices are the documents they want to see.
The Most Common Denominator
When freelancers talk about "sending an invoice," they almost always mean a commercial invoice. This is the document you generate at the end of a project (or milestone) to get paid for the work you just finished.
Proforma vs. Commercial Invoice: Key Differences
Understanding when to use which document will save you headaches at tax time. Here is the breakdown:
| Feature | Proforma Invoice | Commercial Invoice |
|---|---|---|
| When to send it | Before the work begins | After the work is done |
| Primary purpose | Offer an estimate / Secure a deposit | Demand final payment |
| Legal status | Not binding (can be negotiated) | Legally binding |
| Accounting impact | No entry in your books | Recorded as accounts receivable |
| Tax use | Cannot be used for tax purposes | Used for income and sales tax |
When Should Freelancers Use a Proforma Invoice?
If a proforma invoice isn't a "real" invoice, why bother using one at all? Here are three scenarios where freelancers benefit hugely from proforma invoices:
1. Requesting Upfront Deposits
Never start a massive project without a deposit. Rather than sending a completely informal "please pay me 25% now" email, send a highly detailed proforma invoice. It looks incredibly professional and makes it easy for the client's accounting department to process the initial transfer.
2. Formalizing Complex Proposals
If your freelance work involves variable costs (like server usage, stock photos, or ad spend), the final cost might change. A proforma invoice acts as a "good faith estimate" that allows the client to see exactly what they should expect to pay, while giving you the flexibility to adjust the final commercial invoice if the scope creeps slightly.
3. International Clients & Customs
If you sell physical goods (like custom artwork, printed materials, or hardware prototypes) to international clients, customs authorities often require a proforma invoice to assess duties and taxes before the goods even ship.
Can You Pay a Proforma Invoice?
Yes, clients absolutely can (and do) issue payments based on a proforma invoice—this is exactly how you secure your upfront deposit!
However, from an accounting and tax perspective, the transaction is not complete until a commercial invoice is issued. Once you receive the deposit based on your proforma invoice, you must eventually issue a commercial invoice to officially close out the transaction and record the revenue.
Common Mistakes to Avoid
- Forgetting to issue the final invoice: If a client pays your entire fee upfront based on a proforma invoice, you still must send them a commercial invoice marked "Paid in Full" for both of your tax records.
- Confusing your accountant: Don't mix your proforma invoices with your real invoices in your accounting software. Keep them separate. Proforma invoices shouldn't have sequential invoice numbers that overlap with your real ones.
- Not having clear payment terms: Even on a proforma invoice, clearly state that this is an estimate and outline your terms. Read our guide to Net 15 vs Net 30 payment terms to get this right.
Create Your Invoices for Free
Whether you need a proforma quote or a final commercial invoice, formatting matters. A clean, branded document builds immediate trust with new clients.
Our free invoice generator lets you create both. Just change the document title from "Invoice" to "Proforma Invoice", itemize your estimates, and download a professional PDF instantly in your browser.
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