Best Free Invoice Generator UK 2026: No Signup, HMRC Compliant
The best free invoice generators for UK sole traders and freelancers — compared on what actually matters: VAT support, HMRC compliance, no watermarks, and no forced signup.
The best free invoice generator for UK sole traders and freelancers in 2026 is one that 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 that appear at the top of search results are either free trials that expire, freemium plans with monthly invoice limits, or platforms that watermark your PDF until you upgrade.
This comparison cuts through that. We looked at the most commonly recommended free invoice generators for UK users and tested them against the criteria that actually matter for a sole trader or small limited company sending invoices to clients.
## What Makes an Invoice Generator HMRC Compliant?
Before comparing tools, it helps to know what HMRC requires on a UK VAT invoice. For VAT-registered businesses, a full VAT invoice must include 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.
If you are below the £90,000 VAT registration threshold — which applies to most freelancers and small sole traders — you are not required to charge VAT or include a VAT number. Your invoice still needs your name, address, a unique invoice number, date, description of services, and total amount due. A free invoice generator that supports both formats handles both scenarios.
For invoices between £250 and the simplified invoice limit, HMRC permits a shorter format. For invoices above £250 from VAT-registered businesses, the full nine-field format is required.
## The Comparison
| Feature | Free SMB Tools | Invoice Simple | Zoho Invoice | Zervant | Xero (free trial) | |---|---|---|---|---|---| | Free forever | Yes | Limited | Yes (5 invoices/mo) | Yes (5 invoices/mo) | No (30-day trial) | | No account required | Yes | No | No | No | No | | Browser-only (no upload) | Yes | No | No | No | No | | VAT 20%/5%/0% support | Yes | Partial | Yes | Yes | Yes | | GBP default | Yes | Yes | Yes | Yes | Yes | | No watermark on PDF | Yes | No (free plan) | Yes | Yes | Yes | | HMRC VAT fields | Yes | Partial | Yes | Yes | Yes | | Logo upload | Yes | No (free plan) | Yes | Yes | Yes | | Unlimited invoices | Yes | No | No | No | N/A | | Data stays on your device | Yes | No | No | No | No |
### Free SMB Tools Invoice Maker
The Invoice Maker at freesmbtools.com is the only tool in this comparison that is genuinely free forever with no account required, no invoice limits, no watermark, and full browser-only processing. Your invoice data never leaves your device — nothing is uploaded to any server. It supports GBP and all major currencies, VAT at 20%, 5%, and 0%, 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 has no watermark and is indistinguishable from a paid tool's output.
The one trade-off: there is no cloud sync or mobile app. Your data is saved in your browser's local storage between sessions, and you can export as JSON to back up templates. For freelancers who invoice from a single device, this is no constraint at all.
### Invoice Simple
Invoice Simple is one of the most widely recommended free invoice generators, but the free plan is heavily limited. You get three free invoices total before being prompted to upgrade. PDFs on the free plan carry a watermark. There is no browser-only option — your data is stored on their servers. For UK users, VAT support exists but requires navigating tax settings manually. If you hit the free limit, you are looking at a paid subscription.
### Zoho Invoice
Zoho Invoice is free for up to five invoices per month, which covers light invoicing but becomes limiting quickly. It requires account creation and stores your data on Zoho's servers. VAT support is solid and HMRC fields are available. The PDF output is professional and watermark-free. If you are comfortable with cloud storage and the five-invoice monthly cap works for your volume, Zoho is a reasonable option — but it is not truly free for active freelancers.
### Zervant
Zervant is popular in the UK and Nordics. The free plan allows five invoices per month with no watermark, which is more generous than Invoice Simple. Account creation is required. HMRC VAT fields are supported. Like Zoho, the monthly cap makes it unsuitable for anyone invoicing more than once a week.
### Xero (free trial)
Xero is the market leader for UK accounting software and their invoice generator is excellent. However, it is not free — the free trial lasts 30 days, after which you need a paid subscription starting at around £15/month. For a sole trader who just wants to send invoices without full accounting software, the price is hard to justify. Xero's output is HMRC-compliant and professional. If you need full accounting alongside invoicing, Xero is worth the cost. For invoicing alone, it is not the right tool.
## How to Create a UK VAT Invoice for Free
Creating an HMRC-compliant VAT invoice with the Invoice Maker takes under two minutes:
1. Open the Invoice Maker — no account or login required. 2. Enter your business name, address, and VAT registration number (if VAT-registered). 3. Enter your client's name and address. 4. Set the invoice number (sequential from your last invoice), invoice date, and tax point date. 5. Add line items with description, quantity, unit price, and VAT rate (20%, 5%, or 0%). 6. The tool calculates VAT amounts and the total including VAT automatically. 7. Add your GBP bank details in the notes field (sort code, account number, or Faster Payments reference). 8. Click Download PDF. The watermark-free PDF 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. Stating "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 both legally accurate and a polite deterrent to late payment. The UK Late Payment Calculator calculates exactly what interest you can claim.
For sole traders who are not VAT-registered, avoid listing a VAT amount of £0.00 — this can confuse clients into thinking they owe VAT. Simply omit the VAT row entirely and state the total amount due. The Invoice Maker supports this: leave the VAT rate blank or set it to zero and the VAT line does not appear in the PDF.
The best invoice generator is the one you actually use. For most UK freelancers and sole traders — who invoice a handful of clients per month, want to keep financial data private, and do not want to pay a monthly subscription for a tool they use ten minutes a week — a browser-based, account-free, permanently free tool is the right answer.