Invoice Requirements by Country: Mandatory Fields Guide

Quick answer: Invoice requirements by country share a common core: a unique invoice number, issue date, seller and buyer details, a description of the goods or services, quantities, prices and the total. VAT and GST countries add mandatory invoice fields such as tax registration numbers, the tax rate and tax amount per rate, and sometimes e-invoicing, QR codes or local-currency totals.

If you sell to clients in more than one country, you quickly discover that "a proper invoice" means slightly different things in London, Dubai, Riyadh, Karachi, Mumbai, Sydney and Toronto. This hub compares the invoice requirements by country for nine major jurisdictions in one table, explains the extra fields each one adds, and points you to our detailed country guides. When you are ready to build one, the free invoice generator lets you add tax IDs, per-line tax and custom notes, then download a PDF created in your browser.

Important: This guide is general information, not tax or legal advice. Invoice rules, tax rates and e-invoicing deadlines change often. Always confirm the current rules with the relevant tax authority or a qualified adviser before relying on any format.

The universal core: fields almost every invoice needs

Before looking at local differences, it helps to know what nearly every tax authority expects. If your invoice contains the fields below, you are most of the way to compliance anywhere:

1. A clear document title, such as "Invoice" or, in VAT and GST systems, "Tax Invoice".
2. A unique invoice number from a sequential series with no unexplained gaps. Keep one series and explain any voids.
3. The issue date, plus the supply date (tax point) if it differs.
4. Seller details: legal or trading name and address.
5. Buyer details: name and address, at least for business customers.
6. A description of each item clear enough to identify what was supplied.
7. Quantity, unit price and line total.
8. The total amount due, with currency.
9. Payment terms, such as the due date and how to pay.

Once you register for VAT, GST or sales tax, the second layer appears: your tax registration number, often the buyer's tax number, the tax rate and tax amount, and wording for special treatments such as reverse charge, zero rating or exemption. Our guide to tax IDs on invoices explains each country's identifier.

Invoice requirements by country: comparison table

The table summarizes the main mandatory invoice fields in each jurisdiction. Standard rates are shown for orientation only; reduced, zero and special rates exist almost everywhere, so check the current rate for your goods or services.

Country	Main tax (standard rate)	Seller tax ID	Buyer tax ID	Distinctive requirements	E-invoicing status
United States	State and local sales tax (varies; no federal VAT)	Not required by federal law; sales tax permit number sometimes shown	Not required; exemption certificate kept for exempt sales	Sales tax shown as a separate line; rules vary by state	No federal mandate
United Kingdom	VAT 20%	VAT registration number	Not generally, except some cross-border or reverse-charge cases	Supply date (tax point), VAT per rate, simplified invoices up to £250 for retail	No B2B mandate in force yet; plans announced, check current status
European Union	VAT (national rates; minimum standard rate 15%)	VAT number	Yes for intra-EU and reverse-charge supplies	Fields set by the EU VAT Directive plus national extras; reverse charge wording	Mandates spreading country by country
United Arab Emirates	VAT 5%	TRN	TRN where the recipient is registered	"Tax Invoice" title, VAT amount in AED, issue within 14 days of supply	Phased program starting with larger businesses
Saudi Arabia	VAT 15%	VAT registration number	Yes on standard (B2B) tax invoices	Arabic text, QR code on simplified invoices, compliant e-invoicing solution	Mandatory (ZATCA Fatoora), integration in waves
Pakistan	Federal sales tax on goods (18% standard; check current rate) plus provincial sales tax on services	NTN and STRN	NTN and STRN where the buyer is registered	"Sales Tax Invoice" title, value excluding tax, tax rate and amount	FBR digital invoicing for sales tax registered persons
India	GST (main slabs 5% and 18%, plus 40% for some goods)	GSTIN	GSTIN for registered recipients	HSN/SAC codes, place of supply, CGST/SGST or IGST split, reverse charge flag	Mandatory above Rs 5 crore turnover (IRN and QR code)
Australia	GST 10%	ABN	Buyer identity or ABN for sales of $1,000 or more	"Tax invoice" wording, GST amount, which items are taxable	Peppol available; no general B2B mandate
Canada	GST 5%, or HST 13% to 15% in participating provinces, plus PST in some provinces	GST/HST registration number (from $100)	Recipient name (from $500)	Tiered information rules at $100 and $500 for input tax credits	No general B2B mandate

The pattern is clear: the further a country has moved toward VAT or GST with real-time reporting, the more data each invoice has to carry. The US sits at one end with no national invoice law; Saudi Arabia and India sit at the other, with government-validated electronic invoices.

United States

The US has no federal VAT, so there is no national list of mandatory invoice fields. What drives the content of a US invoice is sales tax, which is set by each state and many local jurisdictions, plus IRS rules on keeping records that support your income and expenses. A sound US invoice shows the invoice number and date, your business name and address, the client's details, line items, the taxable subtotal, the sales tax rate and amount as a separate line, the total and payment terms.

Five states have no statewide sales tax, and taxability of services and digital products differs widely. Our guide to sales tax on invoices in the US covers nexus and exempt customers, and the USA invoice generator defaults to USD with a separate tax line. If you pay contractors, W-9 forms and 1099 reporting are a separate obligation from invoicing.

United Kingdom

If you are not VAT-registered, a UK invoice needs the basics: a unique number, your name and address, the customer's name and address, a description, the supply date, the invoice date, the amount and the total. A limited company should also show its registered name and company details. Once you are VAT-registered (the threshold has been £90,000 of taxable turnover since April 2024), a full VAT invoice adds your VAT number, the tax point if different from the invoice date, the unit price, the VAT rate per item, and the total VAT. HMRC's VAT guide (Notice 700) is the official reference.

You can build a GBP invoice in the UK invoice generator. Making Tax Digital affects how you keep records rather than what appears on each invoice.

European Union

EU invoice content is harmonized by the VAT Directive, which lists the details a VAT invoice must contain: issue date, a sequential number, the supplier's VAT number, the customer's VAT number for certain cross-border and reverse-charge supplies, both parties' names and addresses, the quantity and nature of goods or the extent of services, the supply date, the taxable amount per rate, the unit price, the VAT rate and VAT amount, and specific wording for exemptions or reverse charge. Member states can add a few extras, and rates differ by country. The European Commission's Your Europe invoicing rules page summarizes the common list.

For cross-border B2B services, the customer usually accounts for VAT under the reverse charge; see our reverse charge invoice guide for the wording. Our general VAT invoice guide covers mixed rates and credit notes.

United Arab Emirates

UAE VAT has applied at a standard rate of 5% since 2018. A full tax invoice must carry the words "Tax Invoice", your name, address and TRN, the recipient's details and TRN where registered, a sequential number, issue date, supply date if different, a description, unit price, quantity, rate and amount, any discount, and the VAT amount in AED, with the exchange rate if the invoice is in another currency. Tax invoices are generally issued within 14 days of the supply. A simplified tax invoice is allowed in some cases, such as sales to unregistered customers.

The full field list is in our guide to UAE VAT invoice requirements, and the UAE invoice generator is preset with AED and a TRN field. Official guidance is on the Federal Tax Authority website. The UAE is also phasing in e-invoicing through accredited service providers, starting with larger businesses.

Saudi Arabia

Saudi Arabia charges VAT at 15% and has one of the most advanced e-invoicing regimes in the world. Since December 2021, tax invoices must come from a compliant electronic solution; handwritten and editable invoices are not allowed. Standard tax invoices for B2B sales carry the buyer's VAT number, and simplified tax invoices for consumers must include a QR code. Under Phase 2, businesses connect to ZATCA's platform in waves: B2B invoices are cleared in real time and B2C invoices are reported within 24 hours. Invoices must include Arabic text, and many businesses issue bilingual documents.

Read our ZATCA e-invoicing guide for the details. Because Saudi invoices must come from a compliant system, a PDF generator is not suitable for issuing Saudi tax invoices, though it is fine for quotes and proformas.

Pakistan

A Pakistani sales tax invoice carries the words "Sales Tax Invoice", a serial number, the date, the supplier's name, address, NTN and STRN, the buyer's details and registration numbers where the buyer is registered, a description and quantity, the value excluding tax, the sales tax rate and amount, and the value including tax. Federal sales tax applies to goods, while services usually fall under provincial sales tax at different rates, so separate lines for goods and services help.

Under the Finance Act 2026, all sales tax registered persons must integrate with FBR's digital invoicing system. See sales tax invoices in Pakistan and the Pakistan invoice generator for PKR invoices. Freelancers exporting services to foreign clients are usually treated differently, so check how your export income is taxed.

India

A GST tax invoice in India shows the supplier's name, address and GSTIN, a consecutive serial number unique for the financial year, the date, the recipient's name, address and GSTIN where registered, HSN or SAC codes, a description, quantity, taxable value, the rate and amount of tax split into CGST and SGST (intra-state) or IGST (inter-state), the place of supply, whether tax is payable under reverse charge, and a signature or digital signature. Since 22 September 2025, the main GST slabs are 5% and 18%, with 40% for a short list of goods.

Businesses with turnover above Rs 5 crore must report B2B invoices to an Invoice Registration Portal to get an IRN and signed QR code. See our GST invoice guide for the full field list, and check current CBIC notifications for the rate on each HSN or SAC code.

Australia

Only GST-registered businesses can issue a tax invoice in Australia. The ATO requires the document to show it is intended to be a tax invoice, the seller's identity and ABN, the issue date, a brief description, quantity and price, the GST amount (if any), and the extent to which each item is taxable. For sales of $1,000 or more, it must also show the buyer's identity or ABN. GST is 10%. Our guide to Australia tax invoice requirements has the full list and examples.

Canada

Canada does not prescribe a single invoice format, but the information your customer needs to claim input tax credits is tiered by amount. Under $100, show your name, the date and the total. From $100 to $499.99, add your GST/HST registration number and the tax charged (or a statement that tax is included). At $500 or more, also show the buyer's name, the payment terms and a description of each supply. GST is 5%, HST in participating provinces is 13% in Ontario and 14% or 15% in the Atlantic provinces, and some provinces charge separate PST. Check the CRA's current rates for each province you sell into.

E-invoicing: when a PDF is no longer enough

The biggest change to invoice requirements by country is not a new field but a new format. E-invoicing mandates require structured data (such as XML following EN 16931, or a national schema) sent through Peppol or a government platform, sometimes with real-time clearance before the invoice is valid. As of late 2026:

• Saudi Arabia, India and Pakistan already require e-invoicing for many businesses.
• EU countries are rolling out mandates, with Germany, France, Poland, Belgium and others at different stages.
• The UAE is phasing in e-invoicing from 2026 to 2027.
• The US, UK, Australia and Canada have no general B2B e-invoicing mandate, though Peppol is available in Australia.

For dates, see e-invoicing mandates in 2027. Where a mandate applies to you, use certified software for compliant invoices and keep a PDF tool for quotes, proformas and non-mandated clients.

Worked example: one sale, three countries

Suppose you supply consulting worth 2,000 in local currency, with no reduced rates, and you are registered for tax in each country. The tax and total due change with the standard rate:

Country	Net amount	Standard rate	Tax calculation	Total due
UAE	AED 2,000.00	5%	2,000 × 0.05 = 100.00	AED 2,100.00
UK	£2,000.00	20%	2,000 × 0.20 = 400.00	£2,400.00
Saudi Arabia	SAR 2,000.00	15%	2,000 × 0.15 = 300.00	SAR 2,300.00

Now suppose you invoice the UAE client in USD instead. If the net is $2,000 and the exchange rate you use is 3.6725 AED per USD, the VAT is $2,000 × 5% = $100, and the invoice must also show the VAT in AED: $100 × 3.6725 = AED 367.25, with the exchange rate stated. Check the arithmetic for any rate with the sales tax calculator.

Multi-country invoice compliance checklist

• Correct title: "Invoice", "Tax Invoice" or "Sales Tax Invoice" as the country requires.
• Sequential, unique invoice number with no unexplained gaps.
• Issue date and, where different, supply date or tax point.
• Your legal name, address and tax ID (VAT number, TRN, GSTIN, NTN/STRN, ABN or GST/HST number).
• Buyer's name, address and tax ID for business customers where required.
• Clear line descriptions, plus HSN/SAC codes in India.
• Net amount, tax rate and tax amount per rate, and the gross total.
• Tax shown in local currency where required, with the exchange rate.
• Reverse charge, zero-rated or exempt wording where applicable.
• Payment terms, due date and bank details.
• E-invoicing status confirmed for your country and your client's.
• A copy kept for the local retention period; see how long to keep invoices.

Common mistakes with country invoice rules

• Calling a document a tax invoice before you are registered. In VAT and GST systems, only registered businesses issue tax invoices.
• Leaving out the buyer's tax ID. Your client may be unable to reclaim tax, and your invoice gets sent back.
• Using one blended tax line for mixed rates. Show net and tax per rate.
• Charging local tax on a cross-border service that should be reverse charged, or the reverse.
• Showing tax only in a foreign currency where local currency is required.
• Editing an issued invoice instead of issuing a credit note or a corrected invoice under the local rules.
• Assuming a PDF is valid in a country with an e-invoicing mandate.

Build a compliant invoice for your country

Pick the country generator that matches your client, add both tax IDs, set the tax rate per line, and put any reverse charge or exemption wording in the notes. A structured layout such as the Corporate invoice template gives tax IDs and totals a clear place. Then compare your invoice against the checklist above and the official guidance for that country before you send it.