VAT Registration Calculator
Check if your business must register for UK VAT, analyse whether voluntary registration makes financial sense, and compare the impact of VAT on your pricing. Uses the £90,000 threshold for 2025/26.
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How to Use This Calculator
Do I Need to Register? tab
Enter your average monthly turnover or switch to monthly input for seasonal businesses. The calculator computes your rolling 12-month total and compares it against the £90,000 threshold. If you exceed it, you will see the registration deadline and next steps. If you are below, the calculator shows your headroom and projects when you might reach the threshold at your current growth rate.
Voluntary Registration tab
Enter your annual turnover, percentage of B2B sales, and annual input VAT you could reclaim. The calculator analyses the net financial position of registering voluntarily — weighing reclaimable input VAT against admin costs and the impact on B2C customers. Expand "More options" to compare cash vs accrual accounting methods.
VAT vs No VAT Impact tab
Enter your current price, units sold, and cost per unit. Choose between two strategies: adding VAT on top (customer pays more) or absorbing VAT within your current price (your margin shrinks). The calculator shows the impact for both B2B and B2C customers and the effect on your profit.
Share your result
Every input is encoded in the URL. Click Share to send your exact scenario to an accountant, business partner, or save it for later.
The Formula
VAT registration is triggered by a simple threshold test on your rolling 12-month taxable turnover:
Rolling 12-month taxable turnover > £90,000 → Must register
Deregistration Test:
Rolling 12-month taxable turnover < £88,000 → Can deregister
Net VAT Position (voluntary registration):
Net VAT payable = Output VAT − Input VAT
Output VAT = Taxable turnover × 20%
Input VAT = VAT on business purchases (reclaimable)
Pricing Impact:
Strategy A (charge more): New price = Current price × 1.20
Strategy B (absorb): Revenue exc VAT = Current price ÷ 1.20
The £90,000 threshold applies to your taxable turnover over any rolling 12-month period, not a fixed tax year. Taxable turnover includes standard-rated (20%), reduced-rated (5%), and zero-rated supplies. It does not include exempt supplies such as insurance, finance, or education.
If you expect your taxable turnover to exceed £90,000 in the next 30 days alone (for example, a single large contract), you must also register even if your past 12-month total is below the threshold.
Example
Sarah — Freelance Graphic Designer, Manchester
Sarah runs a freelance design business. Her average monthly turnover is £7,500, giving her an annual total of £90,000. She sells 60% to B2B clients and 40% to consumers. Her annual business purchases include £3,500 of reclaimable VAT.
Do I Need to Register? tab
Sarah is exactly at the threshold. She must register because the test is "exceeds £90,000" — at £90,000 exactly she is not yet required, but any additional sale will push her over. She should register proactively to avoid a late registration penalty.
Voluntary Registration analysis
Sarah recovers £3,500 in input VAT minus £500 admin cost = £3,000 net benefit. Her B2B clients (60%) are unaffected because they reclaim the VAT. For her B2C clients, she decides to absorb the VAT in her pricing rather than increase prices.