Pro Forma, Commercial and E-Invoices, Explained

Key Takeaways

A pro forma invoice is a quote in invoice form; in US customs it is also the importer's substitute statement of value under 19 CFR 141.85.
A commercial invoice records goods sold and shipped; for US imports, 19 CFR 141.81 and 141.86 require one per shipment, with listed exemptions, and set its contents, and other countries set their own rules.
Under letters of credit and documentary collections, banks act on documents, including the commercial invoice; ICC rules such as the UCP apply when the credit says it is subject to them.
For EU public procurement, and for EU VAT from July 1, 2030 under Directive (EU) 2025/516, an e-invoice is structured data, not a PDF; until then the VAT Directive accepts any electronic format.
The invoice and the payment connect through remittance data, in ISO 20022 fields or ACH addenda, which is what lets a seller match cash to invoices automatically.

Current as of November 8, 2026. Quotations come from the regulations, directives, supervisory handbook and agency, industry and standards-body documents listed at the end; the working definitions and anything marked (interpretation) are ours. US customs rules are described as they stand in the eCFR; other countries set their own. It is not legal or customs advice.

Three documents share the word invoice and do different jobs. A pro forma invoice comes before a sale and helps the buyer arrange it. A commercial invoice records the sale once the goods ship, and in international trade customs uses it to value them. An e-invoice is not a third kind of invoice: it is an invoice delivered as structured data that the buyer's system can process, and in the EU the law already says what that data must look like for public buyers and, from 2030, for VAT.

The short version

A pro forma invoice is a quote in invoice form; in US customs it is also the importer's substitute statement of value (19 CFR 141.85).
A commercial invoice records goods sold and shipped; US customs requires one for each shipment, with listed exemptions, and sets its contents in 19 CFR 141.86.
For EU public procurement an e-invoice is structured data, not a PDF by email; EU VAT law accepts any electronic format until the ViDA package makes structured e-invoices the default from July 1, 2030.
Remittance data in the payment (ISO 20022 fields, ACH addenda) is what lets the seller match cash to the invoice.

What is a pro forma invoice?

A pro forma invoice is a seller's advance quotation, laid out like an invoice, that the buyer uses to arrange the purchase. The International Trade Administration (ITA), part of the US Department of Commerce, describes it on its export guidance page as "a quote in an invoice format that may be required by the buyer to apply for an import license, contract for pre-shipment inspection, open a letter of credit or arrange for transfer of hard currency." The page adds that it should carry the terms of sale and of payment, an estimated shipping date and a validity date.

US Customs and Border Protection (CBP) regulations use the same words for a different document. Under 19 CFR 141.85 the pro forma is the importer's substitute, headed "Importers Statement Of Value Or The Price Paid In The Form Of An Invoice", in which the importer declares the prices or values "true and correct to the best of my knowledge and belief" and marks the basis for them. Section 141.85 covers a pro forma submitted under any provision of the CBP regulations; the cases in part 141 include:

Merchandise exempt from the commercial invoice requirement (141.83(d), such as goods not intended for sale): "If no invoice or bill is available, a pro forma (or substitute) invoice, as provided for in § 141.85, shall be filed".
A required invoice not available at entry (141.91): unless a waiver is granted under 141.92, CBP accepts the entry only if it "is satisfied that the failure to produce the required invoice is due to a cause beyond the control of the importer", and the importer files a written declaration, a pro forma if no seller's or shipper's invoice is available, and a bond for producing the required invoice.
A waiver of the invoice requirement (141.92): the importer files any invoices received, a statement of their defects and "An executed pro forma invoice in accordance with § 141.85".
Goods sold in transit, installment shipments and split entries (141.86(c), 141.82(c), 141.84): a pro forma stands in for, or refers back to, the original invoice.

What is a commercial invoice?

A commercial invoice is the seller's invoice for goods actually sold and shipped, and across borders it is the document customs uses to assess duty. In ITA's words: "In the buyer’s country, it is the document that is used by their customs officials to assess import duties and taxes."

For US imports, 19 CFR 141.81 says "A commercial invoice shall be presented for each shipment of merchandise at the time the entry summary is filed, subject to the conditions set forth in these regulations", which include the 141.83(d) exemptions, and 141.83(c) says it "shall be prepared in the manner customary in the trade". Section 141.86 lists what each invoice must show, among them the parties and the date and place of sale, a detailed description of the goods, quantities, "The purchase price of each item in the currency of the purchase", itemized charges, the country of origin, and any assists (such as dies or molds the buyer supplied) not included in the price. Invoice data can also go to CBP electronically under part 143 (141.86(h)).

Do invoice requirements differ by country?

Yes; the US rules bind only imports into the United States. ITA's guidance says "it is advisable to consult reliable sources for country-specific requirements", and that "A few countries require the invoice to be on a specific form".

On September 2, 2026, CBP published an advance notice of proposed rulemaking, Heightened Import Disclosures for Supply Chain Visibility, asking about collecting foreign export documentation such as commercial invoices; it proposes no rule text. None of the 2026 Federal Register documents affecting part 141 changes the invoice-content rules in 141.81-141.86. A proposed rule of February 13, 2026 (Electronic Bond Transmission, 91 FR 6986) would change how the 141.91 bond is given, from CBP Form 301 to an electronically transmitted bond; it was not final as of November 8, 2026.

How do pro forma, commercial and e-invoices compare?

	Pro forma invoice	Commercial invoice	E-invoice
Purpose	Quote the sale so the buyer can arrange it, for example an import license or a letter of credit (ITA); in US customs, a substitute statement of value (141.85)	Record the sale and support customs valuation and duty (ITA; 19 CFR 141.81-141.86)	Deliver an invoice as data systems can process (Directive 2014/55/EU)
Legally binding?	An offer, not a demand for payment (interpretation); a customs pro forma is a statement the importer signs	Evidence of the sale and the basis of the payable; whether it is the contract depends on the contract and governing law (interpretation)	The same status as the invoice it carries; the format changes, not the obligation (interpretation)
Who requires it	The buyer, case by case (ITA); CBP in cases such as 141.83(d), 141.91 and 141.92	The importing country's customs authority; in the US, CBP for each shipment unless exempt	EU public buyers must accept it; EU member states may require it; the EU VAT default from July 1, 2030; elsewhere, national law
Format	Any document; for US customs, substantially the 141.85 form	Prepared "in the manner customary in the trade" (141.83), in English or translated (141.86)	A structured format, in the EU one meeting EN 16931, often exchanged over a network such as Peppol

How do invoices work in letters of credit and documentary collections?

In both, the invoice is one of the documents that moves through the banks, and the bank acts on the documents rather than the goods. The Comptroller's Handbook booklet Trade Finance and Services, written for examiners at the Office of the Comptroller of the Currency (OCC), says a letter of credit does not remove the risk of fraud by an exporter "because the bank deals only in documents and does not inspect the goods themselves." Among the checks it lists for examiners is "whether the commercial invoice exceeds the amount available under the letter of credit."

The booklet says US letter of credit rules derive from article 5 of the Uniform Commercial Code, as each state adopts it, and from the International Chamber of Commerce's Uniform Customs and Practice for Documentary Credits (UCP); the version the ICC's own pages refer to is UCP 600. "The UCP does not carry the force of law", it notes, and "For the UCP rules to apply, the commercial letter of credit must expressly indicate that it is subject to the rules." In a documentary collection the bank "acts as an intermediary to facilitate the flow of documents and payments" and gives no guarantee of payment; the ICC's rules for collections are URC 522, which apply when the collection instruction incorporates them (interpretation). For electronic presentation the ICC publishes supplements to both, the eUCP and the eURC.

Since buyers may open the credit from the pro forma (ITA), its terms should match the credit and the later commercial invoice; a discrepancy gives the bank grounds to refuse the documents (interpretation). For how banks automate this work, see What Is Trade Finance Automation?

What is e-invoicing?

E-invoicing is the exchange of an invoice as structured data that software can process without anyone reading it. Directive 2014/55/EU defines an electronic invoice as "an invoice that has been issued, transmitted and received in a structured electronic format which allows for its automatic and electronic processing", and the VAT Directive, as amended by Council Directive (EU) 2025/516, adopts a definition built on the same words from July 1, 2030. Until then the VAT Directive's Article 217 is wider: an invoice "issued and received in any electronic format", which includes a PDF. A PDF by email is therefore an electronic invoice for VAT today, but not for EU public procurement or for VAT from 2030.

Directive 2014/55/EU provided for a European standard for "the semantic data model of the core elements of an electronic invoice", and its Article 6 lists those elements, from seller, buyer and payee information to payment instructions, line items and the VAT breakdown. The standard is EN 16931, whose reference was published by Commission Implementing Decision (EU) 2017/1870.

Where is e-invoicing mandated or standardized?

EU public procurement. Directive 2014/55/EU covers invoices under contracts within the EU procurement directives. Article 7 requires member states to ensure that "contracting authorities and contracting entities receive and process electronic invoices" that meet the European standard. The duty is the public buyer's, to accept; whether suppliers must send e-invoices is a matter for national law (interpretation).

EU VAT: the ViDA package. Council Directive (EU) 2025/516 of March 11, 2025 amends the VAT Directive (2006/112/EC) in phases; member states apply it through national law. The European Commission's ViDA page says that from entry into force on April 14, 2025, "Member States are able to introduce mandatory e-invoicing under specific conditions"; Article 1 lets a member state require businesses established there to issue e-invoices for domestic supplies "in accordance with the conditions they lay down." From July 1, 2030 (Article 5), the new Article 218 says "invoices shall be issued as electronic invoices", though member states may still accept other formats for transactions outside the new reporting requirements, and under the new Article 232 the recipient's acceptance is no longer needed for a standard-compliant e-invoice issued to a business, save where other formats remain allowed. The Commission says digital reporting requirements "will affect cross-border B2B transactions from 1 July 2030". Member states with a domestic real-time reporting obligation in place, authorized or legislated before January 1, 2024 have until January 1, 2035 to apply parts of these changes (Article 6(5)).

Peppol. Peppol is an exchange framework, not a law. It is maintained by OpenPeppol, "a non-profit international association established under Belgian law", and organizations connect through accredited service providers. Its billing specification, Peppol BIS Billing 3.0, is built on EN 16931. It becomes a requirement only where a government or a buyer makes it one (interpretation).

United States. We found no federal rule requiring private businesses to exchange e-invoices with each other; that effort is voluntary and industry-led (interpretation). Selling to the government is different: Defense Department contracts require payment requests "in electronic form using Wide Area WorkFlow (WAWF)" (DFARS 252.232-7003), and a 2015 OMB memorandum, M-15-19, directed agencies to move to electronic invoicing for appropriate federal procurements. The Federal Reserve has supported the Business Payments Coalition (BPC) in building an exchange framework, which its FedPayments Improvement site describes as "an electronic delivery network based on a set of technical standards and policies" for sharing supply chain documents. The same page says the framework was launched by participants in the BPC's E-invoice Exchange Market Pilot, who set up the Digital Business Networks Alliance (DBNAlliance) in 2023 to oversee it.

How do e-invoices connect to e-payments and remittance data?

An e-invoice states what is owed; an e-payment (in our working definition, any payment moved electronically: ACH, wire, instant or card) settles it; remittance data says which invoices it covers. The Federal Reserve's page on electronic remittance states the problem: "remittance information is often sent in an unstructured format and is detached from the delivery of the payment."

ISO 20022. A BPC resource guide hosted by the Fed says remittance information "can be contained in an ISO payment message, similar to an addendum with an ACH payment", and that two stand-alone messages exist, one with full remittance detail and one with a link to it. For the bank-side mapping, see How to Build an ISO 20022 Message Translation Workflow.
ACH addenda. A Federal Reserve presentation on financial EDI lists CCD+ (a corporate credit or debit with addenda) and CTX (Corporate Trade Exchange) among ACH formats used to pay invoices, and shows a CTX payment carrying an ANSI X12 820 remittance advice. The same presentation says the receiving bank is required to deliver that information to the business, as a human-readable report or a machine-readable file; which one a business gets is a matter for its bank (interpretation).

The identifier is the link: if the payment quotes the invoice number in structured remittance fields, the seller can match the cash automatically (interpretation). For the systems that do this matching, see the AP/AR Automation buyer's guide.

Questions to ask

Which country's customs rules apply to each import, and does the commercial invoice carry every field they require?
Which rules does each letter of credit say it is subject to, and do the pro forma, the credit and the commercial invoice describe the goods and amount the same way?
Does each payment carry the invoice reference in structured remittance fields, and does the bank deliver that data in a form the receivables system reads?

Common mistakes

Paying against a pro forma and never matching the payment to the commercial invoice
Treating a customs pro forma as a formality: it is a signed statement, and under 141.91 the required invoice is still owed
Planning only for July 1, 2030: member states can already introduce domestic mandates, since April 14, 2025 without an EU derogation

How we sourced this article: every quotation in it comes from the published documents listed below (pages accessed November 8, 2026), and we keep saved copies of them. The working definitions and everything marked (interpretation) are our own. Rules change; dates are as we found them on the date at the top. If you want to question a point, get in touch through our contact page. Short definitions are in the glossary: pro forma invoice, commercial invoice and e-invoicing.

Sources

Frequently Asked Questions

What is the difference between a pro forma invoice and a commercial invoice?

A pro forma invoice comes before the sale: it is a quote in invoice form that the buyer uses to apply for an import license, open a letter of credit or arrange payment. A commercial invoice comes after: it records goods sold and shipped, and customs uses it to value them. In US customs, a pro forma is also the importer's substitute statement of value, filed under 19 CFR 141.85 when the required invoice is not available.

Is a pro forma invoice legally binding?

In commercial practice it is an offer, not a demand for payment, and whether it binds anyone depends on the contract and the governing law (interpretation). In US customs, the pro forma under 19 CFR 141.85 is a statement the importer signs as true and correct to the best of its knowledge and belief; when it stands in for a missing invoice under 141.91, the importer must still produce the required invoice under bond.

Is a PDF invoice an e-invoice?

It depends on the rule. Under the EU's public-procurement definition (Directive 2014/55/EU) it is not, because that requires a structured electronic format. Under the VAT Directive as it stands today, an invoice issued and received in any electronic format, a PDF included, is an electronic invoice. From July 1, 2030, the VAT definition also requires a structured format.

When does e-invoicing become mandatory in the EU?

It depends on the transaction. Public buyers have had to accept standard e-invoices under Directive 2014/55/EU. Since the ViDA package entered into force on April 14, 2025, member states can require e-invoices for domestic supplies under conditions they set, without the individual derogation earlier mandates needed. From July 1, 2030, e-invoices become the default VAT invoice and digital reporting applies to cross-border B2B supplies.