Best Free Invoice Generator UK 2026: No Signup, HMRC Compliant

The best free invoice generator for UK sole traders and freelancers in 2026 creates a valid, HMRC-compliant VAT invoice, supports GBP, requires no account, and downloads a watermark-free PDF immediately. That combination is harder to find than it should be. Most tools at the top of the search results are free trials that expire, freemium plans with monthly invoice limits, or platforms that watermark your PDF until you upgrade.

Below are the most commonly recommended free invoice generators for UK users, tested against the criteria that matter for a sole trader or small limited company sending invoices to clients.

What makes an invoice generator HMRC compliant?

It helps to know what HMRC requires on a UK VAT invoice before comparing tools. For VAT-registered businesses, a full VAT invoice must carry nine specific fields: your business name and address, the customer's name and address, a unique sequential invoice number, the invoice date, the tax point date (usually the same as the invoice date for services), your VAT registration number, a description of the goods or services supplied, the VAT rate and amount for each line item, and the total amount including VAT.

Below the £90,000 VAT registration threshold, which covers most freelancers and small sole traders, you do not have to charge VAT or include a VAT number. The invoice still needs your name, address, a unique invoice number, the date, a description of services, and the total due. A free invoice generator worth using handles both formats.

HMRC permits a shorter format for invoices between £250 and the simplified invoice limit. Above £250 from a VAT-registered business, the full nine-field format applies.

The comparison

Free SMB Tools Invoice Maker

The Invoice Maker at freesmbtools.com is the only tool here that is free forever with no account, no invoice limit, no watermark, and full browser-only processing. Your invoice data never leaves the device, because nothing is uploaded to any server. It supports GBP and all major currencies, VAT at 20%, 5%, and 0%, the HMRC-required fields including VAT registration number and tax point date, custom logo upload, unlimited line items, discounts, and custom payment terms. The exported PDF carries no watermark and is indistinguishable from a paid tool's output.

The trade-off is no cloud sync and no mobile app. Your data saves to the browser's local storage between sessions, and you can export JSON to back up templates. For anyone who invoices from a single device, that costs nothing.

Invoice Simple

Invoice Simple is one of the most widely recommended free invoice generators, and the free plan is heavily limited. You get three free invoices in total before it prompts you to upgrade, and free-plan PDFs carry a watermark. There is no browser-only mode, so your data sits on their servers. VAT support exists for UK users but you have to navigate the tax settings manually. Hit the free limit and you are looking at a paid subscription.

Zoho Invoice

Zoho Invoice is free for up to five invoices a month, which covers light invoicing and becomes limiting quickly. It requires an account and stores your data on Zoho's servers. VAT support is solid, HMRC fields are available, and the PDF output is professional and watermark-free. If you are comfortable with cloud storage and five invoices a month matches your volume, Zoho is a reasonable option. For an active freelancer it stops being free fast.

Zervant

Zervant is popular in the UK and the Nordics. The free plan allows five invoices a month with no watermark, which is more generous than Invoice Simple. An account is required. HMRC VAT fields are supported. As with Zoho, the monthly cap rules it out for anyone invoicing more than once a week.

Xero (free trial)

Xero is the market leader for UK accounting software and its invoice generator is excellent. It is also not free. The trial runs 30 days, after which a paid subscription starts at around £15/month. Xero's output is HMRC-compliant and professional, and if you need full accounting alongside invoicing it earns the cost. For a sole trader who only wants to send invoices, the price is hard to justify.

How to create a UK VAT invoice for free

Creating an HMRC-compliant VAT invoice with the Invoice Maker takes under two minutes:

• Open the Invoice Maker. There is no account or login.
• Enter your business name, address, and VAT registration number if you are VAT-registered.
• Enter your client's name and address.
• Set the invoice number, sequential from your last one, plus the invoice date and tax point date.
• Add line items with description, quantity, unit price, and VAT rate (20%, 5%, or 0%).
• The tool calculates the VAT amounts and the total including VAT for you.
• Add your GBP bank details in the notes field: sort code, account number, or a Faster Payments reference.
• Click Download PDF. The watermark-free file is ready to email to your client.

Keep a copy of every invoice you issue. HMRC requires sole traders and limited companies to retain business records for at least five years after the Self Assessment filing deadline for that tax year.

UK-specific invoicing tips

Payment terms matter more than most freelancers realise. The Late Payment of Commercial Debts (Interest) Act 1998 entitles UK businesses to charge statutory interest of 8% above the Bank of England base rate on overdue business-to-business invoices. Putting "payment terms: net 30 days. Statutory interest will be applied to overdue invoices under the Late Payment of Commercial Debts Act 1998" in your invoice notes is legally accurate and a polite deterrent at the same time. The UK Late Payment Calculator works out exactly what interest you can claim.

If you are a sole trader who is not VAT-registered, avoid listing a VAT amount of £0.00, which tends to make clients think they owe VAT. Omit the VAT row and state the total due. The Invoice Maker handles this: leave the VAT rate blank or set it to zero and the VAT line disappears from the PDF.

For most UK freelancers and sole traders, invoicing a handful of clients a month, wanting financial data kept private, and unwilling to pay a monthly subscription for ten minutes of use a week, a browser-based, account-free tool covers the job.