Flat Rate VAT Calculator

The VAT Flat Rate Scheme (FRS) is a simplified way for smaller businesses to account for VAT. You still charge your customers the normal 20% VAT on your invoices, but instead of adding up all your output VAT and subtracting all the input VAT you have paid on purchases, you simply pay HMRC a single flat percentage of your VAT-inclusive turnover. The gap between the 20% you collect and the lower flat rate you hand over is yours to keep.

Because you no longer track input VAT on most day-to-day purchases, the scheme cuts down your record-keeping and makes each VAT return quicker to complete. The trade-off is that you generally cannot reclaim VAT on your costs (with one exception for large capital assets — see below).

The scheme tends to suit businesses that:

• have low VAT-bearing costs — typically service businesses, consultants and contractors whose main "cost" is their own time;
• want simpler quarterly VAT returns and fewer receipts to log;
• have VAT-taxable turnover of £150,000 or less (excluding VAT) when they join.

If you buy a lot of stock, materials or other VATable supplies, the standard method usually leaves you better off because you can reclaim that input VAT in full. The calculator above shows both figures side by side so you do not have to guess.

The maths is deliberately simple. You apply your sector's flat rate to your gross (VAT-inclusive) turnover — that is your sales plus the 20% VAT you charged on them.

Take an IT consultant on the "Computer and IT consultancy or data processing" sector, whose flat rate is 14.5%. Suppose they invoice £50,000 of work in the year:

• Net sales: £50,000
• VAT charged to clients at 20%: £10,000
• Gross (VAT-inclusive) turnover: £60,000
• Flat rate VAT due to HMRC: £60,000 × 14.5% = £8,700

The consultant collected £10,000 of VAT but only pays HMRC £8,700, so they keep £1,300 before considering any input VAT they have forgone. Under standard VAT accounting they would instead pay the full £10,000 output VAT minus whatever input VAT they could reclaim on expenses — so the flat rate wins whenever their reclaimable input VAT would have been less than £1,300.

Note that the flat rate is always applied to the gross figure including VAT, not the net £50,000 — a point that trips up a lot of first-time users.

Every business type has its own flat rate, set by HMRC and ranging from 4% for food retailers up to 14.5% for accountancy, legal, architectural, IT consultancy and labour-only construction work. The calculator above lets you pick from the full HMRC sector list (FRS7300), so you can see the exact percentage for your trade rather than a generic estimate.

Example sector	Flat rate
Computer and IT consultancy	14.5%
Management consultancy	14%
General building or construction	9.5%
Catering, restaurants and takeaways	12.5%
Hairdressing and beauty	13%
Retailing food, confectionery, newspapers	4%
Any other activity not listed elsewhere	12%

On eligibility, there are two separate thresholds:

• Joining: your VAT-taxable turnover must be £150,000 or less (excluding VAT) in the next 12 months.
• Leaving: you must leave the scheme once your total income including VAT exceeds £230,000 (or you expect it to in the next 30 days).

The definitive rate table and the scheme rules are published by HMRC in VAT Notice 733. If your business genuinely spans more than one sector, HMRC says you use the rate for the activity that makes up the greater part of your turnover.

To encourage newly registered businesses to try the scheme, HMRC applies a 1 percentage point reduction to your flat rate for your first year in VAT. It runs from the day you register for VAT until the day before the first anniversary of that registration.

So the IT consultant on the 14.5% rate would pay just 13.5% during that first year. On £60,000 of gross turnover that is £8,100 instead of £8,700 — a £600 saving in the first 12 months alone.

The discount is a flat reduction of one point, not 1% of the rate, and it drops away automatically on the first anniversary of your VAT registration. Tick the "first year of VAT registration" option in the calculator to see the reduced figure.

Introduced in 2017 to curb what HMRC saw as abuse of the scheme by labour-only businesses, the limited cost trader rule forces a single high flat rate of 16.5% — regardless of your sector — if you spend very little on goods.

You are a limited cost trader in any VAT period if your spending on relevant goods is less than both of these tests:

• less than 2% of your VAT-inclusive turnover for the period; and
• less than £1,000 a year (pro-rated for shorter periods).

"Relevant goods" means physical goods used in the business — not services, and specifically excluding capital assets, food and drink, vehicles and fuel (unless you are in the transport sector). Because 16.5% of gross turnover works out at roughly 19.8% of your net sales, very little of the 20% VAT you charge is left over. In practice the rule catches consultants, contractors and other labour-only businesses whose only real cost is their time — for many of them the standard VAT method now beats the flat rate.

Enter your annual spend on relevant goods in the calculator and it will apply the 16.5% rate automatically when the test is met.

The single question that decides everything is: how much reclaimable input VAT do you have?

• Low input VAT → the flat rate usually wins. If you have few VATable purchases, you get to keep most of the gap between the 20% you charge and your lower flat rate.
• High input VAT / lots of purchases → standard VAT usually wins. If you buy significant stock, materials, equipment or subcontractor services, reclaiming that VAT in full outweighs the flat-rate saving.

There is a break-even point where the two methods cost exactly the same. In the IT-consultant example, the flat rate saved £1,300 — so standard VAT only becomes cheaper once reclaimable input VAT rises above £1,300 for the year. The comparison panel in the calculator works out this break-even for your own figures, so you can see at a glance which method leaves more money in your pocket before you commit.

Remember to weigh the simpler bookkeeping of the flat rate against a modest cash difference — for many small service businesses the time saved is worth as much as the pounds.

A few details that generic calculators tend to skip:

• Capital assets over £2,000. Even on the flat rate you can reclaim the VAT on a single purchase of capital goods costing £2,000 or more including VAT (for example a laptop or camera bought on one invoice). This is the one everyday exception to the "no input VAT" rule.
• The rate applies to all income, not just standard-rated sales. Zero-rated and exempt income also counts towards your flat-rate turnover, which can make the scheme unattractive if you have a lot of it.
• Annual accounting stacking. The FRS can be combined with the Annual Accounting Scheme to file one VAT return a year with instalment payments.
• You choose whichever is better. Joining the FRS is optional and you can leave voluntarily at any time; you do not have to stay in a scheme that no longer suits you.