Add it.
£100 + £20 = £120
At 20%, VAT is a fifth of the net price. Choose “Before VAT” to calculate the extra amount and the total.
Flat rate VAT calculator
Start with a figure01 / INPUT
Try 600 + 240, 80 × 3 or 1200 / 12.
The whole amount, split02 / RESULT
Total including VAT£1,200.00
£1,000.00 before VAT, £200.00 of VAT at 20%, £1,200.00 in total.
Copy
54 trades as published by GOV.UK, plus the limited cost rate
One transaction only. It ignores input VAT you could reclaim and the first-year discount. It does not work out whether you are a limited cost business - pick that option yourself if you are. Not a recommendation to join or leave the scheme.
On this sale you charge £200.00 of VAT. Under the flat rate scheme at 14.5% of the gross you would hand over £174.00 - £26.00 less than the VAT charged, on this transaction.
A calculator on the figures you type. Not tax advice. Rates checked against GOV.UK and flat rate guidance on 16 September 2026.
Your kept sums 0
This session only. Copy before you go.
A few figures to compare? Keep a sum, give it a name, then work out the next one.
How the sums work ↓
Flat rate VAT calculator
A percentage of the total, not of the VAT.
Under the VAT flat rate scheme you still charge your customer VAT at the normal rate, but you pay HMRC a fixed percentage of your VAT-inclusive turnover instead of the VAT you charged. The percentage depends on your trade. GOV.UK publishes 54 of them, and Levy has every one, plus the 16.5% limited cost business rate.
The percentage applies to the gross, which is the part that catches people out. On a £1,000 sale at 20% you charge £200 of VAT and the total is £1,200. At the 14.5% accountancy rate you would pay 14.5% of £1,200, which is £174.
This is one transaction only. It ignores input VAT you could reclaim and the 1% first-year discount, and it does not decide whether you are a limited cost business: you pick that yourself. It is arithmetic on a single sale, not a recommendation to join or leave the scheme.
Take it out. Properly.
£120 ÷ 1.2 = £100
Reverse VAT starts with division. Taking 20% off the total removes too much. The worked-back note stays beside your result.
Find the percentage.
(gross ÷ net − 1) × 100
Enter both figures to solve the rate. Levy explains the numbers; it never guesses which rate should have applied.
The useful small printWhat this VAT calculator
What this VAT calculator
does, and does not, do.
A calculator on your figures, not tax advice. UK headline rates are 20%, 5% and 0%; whether a rate applies depends on the supply. Check GOV.UK guidance.
The flat rate comparison is arithmetic on a single transaction, not VAT return maths or advice about joining the scheme.
How do I add VAT to a price?
Multiply net by the VAT rate to find the VAT, round to the penny, then add it to net. For example, £100 net at 20% has £20 VAT and a gross total of £120.
How do I remove VAT from a VAT-inclusive price?
Divide gross by 1 plus the rate as a decimal. At 20%, divide by 1.2. £120 including VAT becomes £100 net, with £20 VAT. Subtracting 20% of £120 would give £96, which is not the net price.
Does zero-rated mean VAT-exempt?
No. Zero-rated and exempt are different VAT treatments. This calculator applies a numeric rate; it cannot decide the correct treatment for a sale.
How is the flat rate comparison calculated?
It multiplies this gross amount by the selected trade percentage and compares the result with the VAT on this sale. It is a one-transaction calculation that ignores input VAT reclaim, the first-year discount and the limited cost trader rule. It is not a recommendation to join or leave the scheme.
Can Levy tell me which rate should have applied?
No. The rate solver works backwards from the net and gross figures you enter. It does not determine the correct VAT treatment. If the solved rate is not 20%, 5% or 0%, Levy says: which isn’t a UK rate - check the invoice.
Are my kept sums saved?
The ledger stays only in this page session and disappears on reload. Copy it before leaving. A share link contains the current calculation figures, but not your ledger.
Can I type a sum rather than an amount?
Yes. The amount fields take arithmetic: 600 + 240, 80 × 3, 1200 / 12 and brackets all work. Levy shows the resolved figure beside the field, and says when it rounded to the penny before working out the VAT.