If you're searching for invoicing software with VAT support, there's a good chance you've either just crossed the £90,000 VAT registration threshold or are approaching it. This guide covers what a VAT-compliant invoice actually requires, then compares the tools that handle it well — both lightweight invoicing-only apps and the fuller platforms we've already covered for UK freelancers.
What a VAT invoice actually needs to include
Once VAT-registered, HMRC requires specific details on every invoice over £250 (a "full VAT invoice"):
- Your VAT registration number
- A unique, sequential invoice number
- The invoice date (the tax point)
- Your business name and address, and your customer's
- A description of the goods or services
- The VAT rate applied and the amount of VAT charged
- The total amount including VAT
For supplies of £250 or less, a simplified VAT invoice with fewer details is acceptable. You must issue a VAT invoice within 30 days of the date of supply (or payment, if earlier), and if a customer asks for one, you're required to provide it.
On the threshold itself: registration is compulsory once your taxable turnover exceeds £90,000 in any rolling 12-month period — not your tax year, any 12-month window — or if you expect to exceed it within the next 30 days. You have 30 days to register once you cross it.
Two different paths, depending on what you need
If you already use (or are considering) a full bookkeeping platform, VAT-compliant invoicing is typically built in — we've covered the main options for UK sole traders' Self Assessment and UK limited company bookkeeping already, so this post won't re-cover FreeAgent, Xero, or QuickBooks in depth — see those guides if you want full bookkeeping alongside invoicing.
If you just want to send professional, VAT-compliant invoices without a full accounting system, the two standouts are below.
Quick comparison
| Tool | Price | UK VAT Compliance | Best For |
|---|---|---|---|
| Zoho Invoice | Free | Strong — VAT-compliant templates built in | Freelancers who just need invoicing, no accounting |
| Invoice Ninja | Free (generous tier) to ~$18/mo | Weaker — not UK-focused, no built-in VAT/CIS compliance | Technical freelancers wanting customisation/self-hosting |
| FreeAgent / Xero / QuickBooks | See our other guides | Strong — full bookkeeping + invoicing | Freelancers who want invoicing and accounting in one place |
Free-tier limits (invoice/client caps) varied across sources I checked — confirm current limits directly on each provider's site.
Zoho Invoice
Zoho Invoice is genuinely free, not a stripped-down trial — Zoho's own UK page describes it as 100% free with no paid plans, including recurring invoices, automated payment reminders, and online card payments. It produces VAT-compliant invoices out of the box and handles multi-currency billing with automatic exchange rates, useful if you bill international clients. Sources disagreed on the exact free-tier invoice cap (figures ranging from 500/year to effectively unlimited), so confirm the current limit directly before relying on it for high volume.
Good for: Freelancers who want solid UK VAT support without paying anything, and don't need full bookkeeping.
Worth knowing: Several reviews describe the interface as dated and needing some setup time to configure correctly for UK VAT — budget a bit of time upfront rather than expecting it to work perfectly out of the box.
Invoice Ninja
Invoice Ninja is the open-source option — genuinely free with a generous client/invoice allowance, and self-hostable if you want full control over your data. It handles multi-currency and general VAT/GST fields well internationally. The important caveat for UK freelancers specifically: one UK-focused review found it lacks built-in VAT/CIS compliance the way Zoho or the full UK platforms do — you can configure GBP and add your own VAT details manually, but it's not purpose-built for UK rules the way Zoho Invoice is.
Good for: Technical freelancers who want full customisation or self-hosting and are comfortable manually configuring VAT fields rather than relying on built-in UK compliance.
Pricing note: Invoice Ninja raised its paid-tier pricing industry-wide from January 2026 — the free tier was unaffected, but confirm current Pro pricing before committing if you expect to outgrow the free tier.
Which one should you choose?
- Want free, UK-specific VAT compliance with minimal setup: Zoho Invoice.
- Want full control, open-source, and don't mind configuring VAT manually: Invoice Ninja.
- Want invoicing bundled with full bookkeeping and tax filing: see our UK sole trader or limited company guides instead.
FAQ
Do I need VAT-compliant invoicing software, or can I just add VAT manually to a template?
You can do it manually, but a tool that generates compliant invoices automatically reduces the risk of missing a required field — easy to do when adding VAT details by hand under time pressure.
What happens if my invoice is missing required VAT details?
Your customer may be unable to reclaim the VAT on their own return without a compliant invoice, which can create friction with clients — worth getting right even on a tool that doesn't enforce the format for you.
Is simplified invoicing (under £250) different from full VAT invoicing?
Yes — supplies of £250 or less only require a simplified set of details rather than the full list. Most invoicing tools handle both formats automatically based on the invoice total.
Can I use free invoicing software once I'm VAT registered, or do I need paid accounting software?
Free tools like Zoho Invoice do support VAT-compliant invoicing — paid accounting software becomes more relevant when you need full bookkeeping, VAT return filing, or Making Tax Digital submission beyond just sending invoices.
Last updated: September 2026. This post is for informational purposes only and isn't tax or legal advice. Consult a licensed UK accountant for guidance specific to your situation.
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