VAT Flat Rate Scheme Calculator
Choose your sector, enter your VAT-inclusive turnover — see the flat-rate VAT you'd pay, the first-year discount, and how it compares with standard VAT accounting. Whether the scheme actually saves you money turns almost entirely on your sector rate and the limited-cost test, and the calculator surfaces both.
How it works
Under the Flat Rate Scheme you charge customers 20% VAT as normal but pay HMRC a fixed percentage of your VAT-INCLUSIVE turnover, set by sector — from 4% (food retail) to 14.5% (IT consultancy, accountancy, legal) — and in exchange you give up reclaiming input VAT on most purchases. Joining requires expected VAT-taxable turnover of £150,000 or less (ex VAT).
A worked example: an IT consultant invoices £60,000 including VAT in a year. At the 14.5% sector rate the flat-rate bill is £60,000 × 14.5% = £8,700. Under standard accounting the output VAT inside that £60,000 would be £10,000 (20/120), so the scheme leaves a £1,300 margin — which is what compensates for giving up input VAT reclaims.
Two big modifiers: in your FIRST YEAR of VAT registration you get a 1% discount on your sector rate; and if you're a "limited cost business" — goods cost under 2% of turnover or under £1,000/year — you must use 16.5% regardless of sector, which usually wipes out the scheme's benefit for service contractors.
Both modifiers in numbers, on the same £60,000: the first-year discount cuts the IT rate to 13.5%, a bill of £8,100 — £600 less. The limited-cost rate of 16.5% produces £9,900, just £100 below the £10,000 of output VAT — effectively no benefit. On £60,000 of turnover, the 2% goods test means spending under £1,200 a year on goods triggers that 16.5% rate.
The most common mistakes: applying the flat percentage to net (ex-VAT) turnover — the rate is set for VAT-inclusive turnover, and using net understates the bill; and counting services, capital items, or (for most businesses) food, vehicles and fuel toward the goods test — only goods count, which is exactly why service contractors so often fail it.
HONEST NOTE: the comparison shown against standard VAT is the OUTPUT side only — under standard accounting you'd also reclaim input VAT on purchases, which this calculator can't know. FRS wins for service businesses with low VATable costs and a low sector rate; it loses if you buy significant goods/services with VAT on them. Since the 2017 limited-cost rule, far fewer businesses benefit than the old folklore suggests.
The result therefore shows your flat-rate bill, the first-year figure, and the output-VAT comparison — not a full profit-and-loss verdict. Before joining or leaving, run a whole year's real figures through both methods, including your actual input VAT; and note the scheme has an exit threshold on VAT-inclusive income (see HMRC VAT Notice 733).
FAQ
How does the VAT Flat Rate Scheme work?
You invoice clients with 20% VAT as usual, but instead of the normal output-minus-input calculation, you simply pay HMRC your sector's flat percentage of gross (VAT-inclusive) turnover. Example: an IT consultant billing £60,000 including VAT at the 14.5% rate pays £8,700 — versus £10,000 output VAT under standard accounting, before any input reclaims. The difference is your margin for giving up input VAT recovery on day-to-day costs.
What is a limited cost business and why is the rate 16.5%?
A business whose spending on GOODS (not services, not capital items, not food/vehicles/fuel for most) is less than 2% of VAT-inclusive turnover, or less than £1,000 a year. Most contractors and consultants fall into this test — and must then use 16.5% instead of their sector rate. At 16.5% of gross turnover you pay almost exactly the 20/120 output VAT, so the scheme saves nearly nothing; HMRC introduced the rule in 2017 precisely to close the contractor advantage.
Should I join the Flat Rate Scheme or stay on standard VAT?
Join if: your sector rate is low, your VATable purchases are small (but you still buy enough goods to escape the limited-cost test), and you value simpler bookkeeping. Stay standard if: you reclaim significant input VAT (equipment, stock, subcontractors), your clients are VAT-registered anyway, or you'd be stuck at 16.5%. Run both numbers with a full year's figures before deciding — and note you must leave the scheme once VAT-inclusive income exceeds the exit threshold (see HMRC VAT Notice 733).
Is the flat rate applied to net or VAT-inclusive turnover?
VAT-inclusive — the percentage is set for gross turnover, which is why the rates look lower than they behave. An IT consultant's 14.5% of £60,000 gross (£8,700) is equivalent to 17.4% of the £50,000 net. Applying your sector rate to net turnover is the classic error and understates the bill you actually owe HMRC.
How much is the first-year discount worth?
One percentage point off your sector rate for the first year of VAT registration. At £60,000 of VAT-inclusive turnover on the 14.5% IT rate, the discounted 13.5% produces a bill of £8,100 instead of £8,700 — £600 kept. The discount applies whatever your sector, so the saving scales directly with your turnover and rate.
Who can join the Flat Rate Scheme?
VAT-registered businesses that expect VAT-taxable turnover of £150,000 or less (excluding VAT) in the next year. Once inside, you stay until VAT-inclusive income exceeds the scheme's exit threshold — HMRC VAT Notice 733 has the leaving rules. The join test is about expected turnover, so growing businesses should check they will still fit before committing.
Do sector rates really range from 4% to 16.5%?
Yes — the gov.uk table runs from 4% for retailing food, confectionery, tobacco, newspapers and children's clothing up to 14.5% for sectors like IT consultancy, accountancy and legal services, with the compulsory 16.5% limited-cost rate above them all. Picking the right sector line matters: it is the single biggest driver of whether the scheme pays.