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A proforma invoice is the preliminary quote your China or Vietnam supplier sends before you pay a deposit — not a final bill, but the document that confirms price, specs, and payment terms. This guide breaks down exactly what should be on one, with a line-by-line worked example, plus how it's used differently across the USA, Ireland, Singapore, South Africa, and the UAE.
In short: A proforma invoice is a preliminary bill your supplier in China or Vietnam sends you before you pay a deposit or place a confirmed order. It isn't a demand for payment and it isn't a legal invoice — it's a detailed quote that lays out the exact product, price, quantity, payment terms, and shipping details both sides are agreeing to, so there's no confusion once you wire your deposit. Every importer, whether you're sourcing into the USA, Ireland, Singapore, South Africa, or the UAE, will receive one before their first real order, and knowing how to read it properly can save you from costly misunderstandings down the line.
Last updated: October 10, 2026
What Is a Proforma Invoice?
A proforma invoice (often shortened to "PI") is a document your supplier prepares that estimates the cost of goods before the sale is finalized. Think of it as a formal quotation with extra detail — it's not a request for payment the way a commercial invoice is, but suppliers often ask you to sign and return it as confirmation before they start production or request your deposit.
Many first-time importers confuse a proforma invoice with a commercial invoice. They look similar, but they serve different purposes at different stages of the order.
Proforma Invoice vs Commercial Invoice vs Quotation: What's the Difference?
| Document | When You Receive It | Purpose | Legally Binding? |
|---|---|---|---|
| Quotation | Before negotiation is finalized | Rough price estimate, often less detailed | No |
| Proforma Invoice | After terms are agreed, before deposit payment | Confirms exact product, price, quantity, and terms | No (but treated as a firm commitment) |
| Commercial Invoice | After goods ship | Used for customs clearance and final payment reconciliation | Yes |
Why Does Your Supplier Send a Proforma Invoice?
Suppliers send a proforma invoice for a few practical reasons:
- To confirm you both agree on product specifications, unit price, and total quantity before production starts.
- To give you a document you can use internally — for example, to apply for an import permit, open a letter of credit, or get approval from your own finance team.
- To formally request a deposit payment, typically 30%, with the balance due before or after shipment depending on your agreed terms.
- To protect both sides from misunderstandings if prices or specifications change later.
What Should Be Included on a Proforma Invoice? (Worked Example)
Here's a line-by-line breakdown of what a complete proforma invoice should include, using a simple example order of 1,000 units of a private label product:
| Field | Example | Why It Matters |
|---|---|---|
| Supplier name & address | Ningbo ABC Manufacturing Co., Ltd., Ningbo, China | Confirms who you're legally contracting with |
| Buyer name & address | Your registered business name and address | Needed for customs and payment records |
| Proforma invoice number & date | PI-2026-0847, issued 10 Oct 2026 | Reference for both parties and your bank |
| Product description & HS code | Stainless steel water bottle, 500ml, HS 7323.93 | Needed for duty calculation and customs clearance later |
| Quantity & unit price | 1,000 units @ $3.20/unit | Confirms the agreed price before production |
| Total value | $3,200.00 | What your deposit and balance will be calculated from |
| Incoterm | FOB Ningbo | Defines who pays for and arranges freight from this point |
| Payment terms | 30% deposit (T/T), 70% balance before shipment | Sets expectations for when money changes hands |
| Production & shipping lead time | 25 days production, 30–35 days ocean freight | Lets you plan inventory and selling dates |
| Bank details | Supplier's bank account for the deposit transfer | Critical to verify — this is where payment fraud happens |
That last row is worth repeating: always verify your supplier's bank details through a second channel (a phone call, a video call, your sourcing agent) before wiring money. Email accounts get compromised, and fraudulent "updated bank details" emails are one of the most common scams importers face.
How Do You Verify a Proforma Invoice Is Accurate Before Paying?
Before you wire a deposit, check that the proforma invoice matches everything you agreed on during negotiation — not just the price, but the exact specifications, packaging, certifications, and lead time. If anything has quietly changed (a slightly different material, a shorter warranty, a longer lead time), it's much easier to query it before you've paid than after.
If you're working with a sourcing partner, this verification step is usually built into the process — someone who speaks the supplier's language and understands manufacturing in China or Vietnam can confirm nothing has been glossed over.
Does a Proforma Invoice Differ by Country? (USA, Ireland, Singapore, South Africa, UAE)
The structure of a proforma invoice itself is largely universal — it's an international business document, not a country-specific legal form. What changes by market is how you use it afterward:
- USA: You may need the proforma invoice to estimate duties for a customs bond application or to support an ISF filing before your ocean shipment departs.
- Ireland: Your proforma invoice supports your customs declaration and VAT calculation when the goods arrive in the EU.
- Singapore & wider SEA: Singapore Customs may request the proforma invoice to support an import permit application ahead of the shipment's arrival.
- South Africa: SARS often requests the proforma invoice alongside the final commercial invoice to cross-check declared values during customs clearance.
- UAE: Many UAE banks require a proforma invoice before releasing funds for an international wire transfer, since it documents the purpose of the payment.
Frequently Asked Questions
Is a proforma invoice the same as a final invoice?
No. A proforma invoice is a preliminary estimate issued before the sale is finalized. A commercial invoice is the final, legally binding document issued once goods have shipped.
Do I have to pay a proforma invoice?
Not directly — a proforma invoice isn't a request for payment in the same way a commercial invoice is. However, it typically confirms the deposit amount you've already agreed to pay, so in practice, yes, it leads to a payment.
Can the price on a proforma invoice change later?
It shouldn't, if both sides have agreed to it. If your supplier tries to increase the price after you've signed and paid a deposit based on the proforma invoice, that's a red flag worth raising immediately — ideally with a sourcing partner who can push back on your behalf.
What's the difference between a proforma invoice and a sales contract?
A proforma invoice is typically simpler and more transactional, while a sales contract may include additional legal terms like warranty conditions, dispute resolution, and liability clauses. Larger orders often use both.
Why do banks sometimes ask for a proforma invoice before a wire transfer?
Banks use it to confirm the purpose and legitimacy of an international payment, particularly for cross-border business transfers. It's a standard part of anti-fraud and compliance checks in most countries, including the UAE and South Africa.
How Epic Sourcing Helps
Reading a proforma invoice correctly — and knowing when something doesn't add up — gets much easier with a bilingual team on the ground in China and Vietnam checking it before you pay. Epic Sourcing reviews every proforma invoice for our clients across the USA, Ireland, Singapore, South Africa, and the UAE, verifying supplier details, specifications, and bank information before a single dollar moves. See how our end-to-end sourcing service works, or get in touch — no pressure, no obligation.
Related reading: do you need a customs bond to import from China into the USA, ISF filing requirements explained, and how to choose the right sourcing partner.