When Should You Register for VAT? A Plain-English Guide for UK Business Owners
VAT is one of the most misunderstood areas of UK tax for small business owners. Many assume they only need to register when forced to — but in some cases, voluntary registration can actually save your business money. This guide explains everything you need to know.
What Is the VAT Registration Threshold?
You must register for VAT if your VAT-taxable turnover exceeds the current threshold in any rolling 12-month period. As of 2024/25, the threshold is£90,000. This is not your profit — it is your total sales turnover before any expenses are deducted.
⚠️ Rolling 12 Months — Not the Tax Year
HMRC does not just look at your annual turnover at the end of the tax year. They look at any rolling 12-month period. If your turnover exceeds £90,000 at any point during the year, you must register within 30 days. Missing this deadline results in penalties backdated to when you should have registered.
Mandatory vs Voluntary Registration
Mandatory RegistrationVoluntary RegistrationWhenTurnover exceeds £90,000Any time, at your discretionWho benefitsRequired by lawBusinesses with VAT-registered clientsCash flow impactCollect VAT from customersReclaim VAT on purchases
When Does Voluntary Registration Make Sense?
Your clients are VAT-registered businesses— they can reclaim the VAT you charge, so adding 20% to your invoices does not cost them anything. Meanwhile, you can reclaim VAT on all your business purchases
You make significant purchases— if you buy a lot of equipment, stock, or services that include VAT, voluntary registration lets you reclaim that VAT back
You want to appear larger— some clients associate VAT registration with an established, professional business
💡 SAS Tip
If your customers are mostly VAT-registered businesses, voluntary registration is almost always beneficial. If your customers are members of the public who cannot reclaim VAT, registering early may make your prices less competitive. The right answer depends entirely on who you sell to.
VAT Schemes — Which One Is Right for You?
Flat Rate Scheme— you pay a fixed percentage of your turnover as VAT, regardless of what you actually charged. Can be profitable if your costs are low
Cash Accounting Scheme— you only pay VAT to HMRC when your customer pays you, not when you issue the invoice. Excellent for cash flow
Annual Accounting Scheme— you make one VAT return per year instead of four, with advance payments throughout the year
Retail Schemes— simplified methods for businesses that sell direct to the public
What Records Must You Keep?
VAT invoices for all sales and purchases
A VAT account showing input and output tax
Records of any goods imported or exported
Under MTD for VAT, all records must be kept digitally using HMRC-approved software
⚠️ MTD for VAT Is Already Mandatory
Since April 2022, all VAT-registered businesses must keep digital records and submit VAT returns using Making Tax Digital compatible software. If you are still submitting VAT returns manually through your HMRC online account, you are already non-compliant and should act immediately.
