Invoice number generator

Type your first or last invoice number and the tool carries on from it: INV-0041 is followed by INV-0042, 2026/9 by 2026/10. Download the PDF and press "Start the next invoice".

Free, no sign-up. Runs in your browser. Nothing you type or upload is sent to us or stored.

Title

Charge by

QuantityHoursDays

Invoice number

Date

Due date

Currency

Tax name

From

Name

Address and contact

Address, email, phone: one per line.

Tax ID (optional)

Logo (optional)

or drop it here. It never leaves your browser.

Bill to

Name

Address and contact

Address, email, phone: one per line.

Tax ID (optional)

Items

$0.00

Discount

USD%

Payment details

Bank account, UPI ID, PayPal or a payment link.

Notes

This sample isn't saved: download the PDF when it's ready. Open the plain invoice generator to keep your details in this browser. This is a free tool, not tax advice: check what your invoices must show where you are.

Subtotal: $0.00
Total: $0.00

At a glance

How the next number is made: The last group of digits goes up by one and keeps its zero padding: INV-0099 becomes INV-0100, 2026-0001 becomes 2026-0002, and a number with no digits gets -2 added.; checked 2026-11
UK and EU: sequential: HMRC asks for a sequential number based on one or more series that uniquely identifies the invoice. The European Commission asks for a unique sequential number.; Source: gov.uk, checked 2026-11
India: 16 characters: A GST tax invoice needs a consecutive serial number of up to 16 characters, in one or more series, unique for the financial year.; Source: gstcouncil.gov.in, checked 2026-11
Australia: good practice: business.gov.au recommends a unique invoice number on tax invoices, and lists it as common practice on regular invoices.; Source: business.gov.au, checked 2026-11

Put your contact and payment links on one page

Add a link to your Liite page on every invoice. Clients find your work, your contact details and your payment links in one place at liite.co/yourname, and you can change them without reissuing anything.

Make your free page

Invoice number generator: what to know

This page starts the invoice generator for this case. For every option and how to use it, see the invoice generator.

Pick a format you can keep

Any format works as long as each number is used once and they run in order. Common choices: a plain counter with zero padding (0001), a prefix (INV-0001), or the year and a counter (2026-0001), which starts again each year. Padding to four digits keeps the numbers sorting properly in folders and spreadsheets.

You can run more than one series, for example one per client (ACME-001) or one per branch. Keep each series in order, and don't reuse a number, even for an invoice you cancelled.

Why not random numbers?

Random invoice numbers are easy to make but hard to check. Sequential numbers show at a glance whether an invoice is missing, and tax authorities that set rules, such as HMRC and the EU, ask for a sequence.

Questions

Can I create my own invoice number?

Yes. You choose the format. What matters is that every number is unique and they follow a sequence.

How do I create my first invoice number?

Pick a format and start at 1, for example INV-0001 or 2026-0001. Some businesses start at a higher number such as 1001; that's fine as long as you carry on in order from there.

Does the tool remember my last number?

Yes, in this browser. Your draft, including the number, is saved locally, so next time it's there. On another device, type your last number and carry on.