VAT Flat Rate Scheme Calculator — Is It Worth It for Your Business?

How to use this calculator

1. 1 Enter your gross annual sales, the total amount you invoice customers including VAT, and the calculator will work from there.
2. 2 Select your business type from the dropdown to find your flat rate VAT percentage. There are dozens of categories, so use the search box to find yours quickly.
3. 3 Tick the first-year discount box if you registered for VAT less than 12 months ago, then read the two-column comparison to see whether the Flat Rate Scheme puts more money in your pocket than standard VAT.

How the VAT Flat Rate Scheme works

When you are registered for VAT the standard way, you add 20% VAT to every sale and collect that money from your customers. Then, every quarter, you add up all the VAT your customers paid you, subtract all the VAT you paid on your own business purchases, and send the difference to HMRC. Simple in theory. In practice, it means keeping meticulous records of every invoice and receipt, every quarter, without fail. The Flat Rate Scheme cuts through that complexity. Instead of tracking every penny of VAT in and out, you simply pay HMRC a fixed percentage of your total turnover, including VAT. That percentage depends on your type of business — a marketing consultant pays 11%, a computer repair business pays 10.5%, an accountancy firm pays 14.5%. You still charge your customers 20% VAT as normal. The difference between what you collect and what you pay HMRC is yours to keep.

HMRC introduced the scheme in 2002, partly to reduce the administrative burden on small businesses and partly because the cost of processing small VAT returns was disproportionate. The scheme only accepts businesses with VAT-taxable turnover below £150,000 a year, and you cannot use it if you left the scheme in the last 12 months or have committed a VAT offence. It is genuinely simpler to run. Whether it saves you money depends almost entirely on how much VAT you spend on your own purchases.

Formula

VAT collected from customers = Gross sales × 20/120
VAT paid to HMRC (FRS)       = Gross sales × flat rate %
Profit from the scheme       = VAT collected − VAT paid to HMRC

Worked example

Frequently asked questions

What is the VAT Flat Rate Scheme?

The VAT Flat Rate Scheme is a simplified way for small businesses to pay VAT. Instead of recording every penny of VAT you charge and every penny you pay on purchases, you pay HMRC a single fixed percentage of your total (VAT-inclusive) turnover. The percentage varies by business type, from around 4% for retailers of food and newspapers to 14.5% for accountancy firms. You still charge customers 20% VAT as normal. The scheme means less bookkeeping and, for many service businesses, a financial benefit.

Who is eligible for the VAT Flat Rate Scheme?

You can join if your VAT-taxable turnover for the next year is expected to be £150,000 or less. You cannot join if you left the scheme within the last 12 months, if you have committed a VAT offence in the last year, or if you are closely associated with another business already using the scheme. Once in the scheme, you must leave if your total business income (including VAT) exceeds £230,000, or if you expect your VAT-taxable turnover to exceed £150,000 in the next 12 months.

What is the limited cost trader rate and does it apply to me?

If you spend less than 2% of your VAT-inclusive turnover on goods in a quarter, or less than £250 on goods in a quarter, HMRC classes you as a limited cost trader. Limited cost traders pay a flat rate of 16.5%, regardless of their business type. The key word is goods: physical items you buy and use in your business. Services such as accountancy fees, insurance, travel, and software subscriptions do not count. For many consultants and service providers, the limited cost trader rate applies and significantly reduces the financial benefit of the scheme.

Can I leave the Flat Rate Scheme if it stops being beneficial?

Yes. You can leave at any time by writing to HMRC. If you leave voluntarily, you cannot rejoin for 12 months. If HMRC removes you because your turnover exceeded the limit, the rules around rejoining are different. Review the scheme every year, particularly if your business changes. A consultant who starts buying significant equipment, for example, might find that the standard VAT method reclaims more than the Flat Rate Scheme saves. This calculator makes it easy to run that comparison with your latest figures.

What is the 1% first-year discount on the Flat Rate Scheme?

During the first year of your VAT registration, HMRC reduces your flat rate percentage by one percentage point. So a marketing consultant who would normally pay 11% pays 10% in year one. This applies from your registration date, not from when you joined the Flat Rate Scheme. If you registered for VAT and immediately joined the Flat Rate Scheme, the discount applies straight away. After 12 months from your VAT registration date, the discount stops automatically and you revert to your sector's standard rate.

Do I still charge 20% VAT to customers on the Flat Rate Scheme?

Yes. The Flat Rate Scheme only changes your relationship with HMRC — your customers are unaffected. You add 20% VAT to your invoices in the normal way (or 5% for reduced-rate supplies). The scheme changes the percentage of your gross turnover you pay HMRC, not the rate you charge. This is the source of the financial benefit: you collect 20% from customers but pay HMRC a lower percentage. The gap stays in your business.

What happens when my turnover exceeds £150,000 on the Flat Rate Scheme?

You must leave the scheme. HMRC requires you to write and tell them within 30 days of the end of the year in which you exceeded £150,000. If you expect your turnover to exceed £150,000 in the next 12 months, you should leave before that happens. Once you leave, you move to standard VAT accounting and begin tracking input and output VAT in the usual way. You cannot rejoin the Flat Rate Scheme unless your turnover drops back to £150,000 or below and at least 12 months have passed since you left.

How do I join the VAT Flat Rate Scheme?

You apply online through your Government Gateway account. If you are registering for VAT for the first time, you can apply for the Flat Rate Scheme at the same time as your VAT registration. If you are already VAT registered, log in to your HMRC online account, go to your VAT details, and apply from there. HMRC will confirm your flat rate percentage in writing — keep this letter. Your flat rate percentage applies from the date shown in the letter, so do not start using it before that date.

Common mistakes

• Assuming the Flat Rate Scheme always saves money. It does not. The scheme rewards low-cost service businesses and penalises businesses with high material costs. Before you join, calculate how much VAT you paid on purchases last year. If it is a large figure, the standard method may serve you better. Use the calculator on this page to run the numbers before making any decision.
• Forgetting the 1% first-year discount. During the first year of your VAT registration, HMRC reduces your flat rate by one percentage point. A marketing consultant would pay 10% instead of 11%. Many new registrants simply forget to apply it, and quietly overpay HMRC for 12 months. Tick the first-year discount box in the calculator if you registered for VAT within the last year.
• Not realising the exit threshold is £150,000 gross, not net. The Flat Rate Scheme is only available to businesses with VAT-taxable turnover below £150,000. That is gross turnover — the total including VAT. If your net sales are £125,000 and you charge 20% VAT on top, your gross turnover is £150,000 exactly, and you are at the limit. HMRC expects you to leave the scheme within 30 days of your anniversary if you are likely to exceed the threshold in the next 12 months.
• Charging customers the wrong VAT rate. The Flat Rate Scheme changes what you pay HMRC. It does not change what you charge your customers. You still add 20% VAT to every invoice (or 5% for reduced-rate goods), exactly as you would under standard VAT. The scheme only affects your quarterly payment to HMRC, not your sales invoices.
• Ignoring the limited cost trader test. Many freelancers and consultants assume they will pay their sector's flat rate percentage. But if your spending on goods is very low, HMRC classifies you as a limited cost trader and charges a flat rate of 16.5% instead. Goods count for this test — expenses like travel, software, and accountancy fees do not. It is easy to miscount, so check the test carefully each year, especially if your spending patterns change.

VAT rules and HMRC guidance

The definitive guide to the Flat Rate Scheme is HMRC VAT Notice 733: Flat Rate Scheme for small businesses. It covers eligibility, how to apply, how to calculate your payments, the limited cost trader rules, record-keeping requirements, and when you must leave the scheme. You can read it in full at gov.uk/guidance/flat-rate-scheme-for-small-businesses-vat-notice-733--2. For the full list of flat rate percentages by business type, HMRC publishes the current rates at gov.uk/vat-flat-rate-scheme/how-much-you-pay. Check this list each year, as HMRC reviews and updates percentages periodically.

If you need to contact HMRC about the Flat Rate Scheme — including queries about your flat rate percentage or whether the limited cost trader rules apply to your business — the VAT helpline is 0300 200 3700 (Monday to Friday, 8am to 6pm). For most administrative tasks, including joining or leaving the scheme, your Government Gateway account at gov.uk/log-in-register-hmrc-online-services is the quickest route.