Calculate your VAT savings under the HMRC Flat Rate Scheme for small businesses.
This calculator provides estimates for guidance only. It does not constitute financial or tax advice. VAT flat rate percentages vary by trade sector and may change. Always verify with HMRC or a qualified accountant.
The VAT Flat Rate Scheme is a simplified way for small businesses in the UK to account for and pay VAT to HMRC. Instead of calculating VAT on every individual sale and purchase, you pay a fixed percentage of your gross (VAT-inclusive) turnover. This fixed percentage depends on your trade sector and is typically lower than the standard 20% VAT rate, meaning most businesses on the scheme keep the difference as additional profit. To be eligible for the Flat Rate Scheme, your VAT-taxable turnover must be GBP 150,000 or less (excluding VAT) in the next 12 months. You must leave the scheme if your total business income exceeds GBP 230,000 (including VAT) in any 12-month period. The scheme is designed to reduce the administrative burden on small businesses by eliminating the need to track VAT on every individual purchase. HMRC publishes a table of flat rate percentages for different trade sectors, ranging from 4% for retailers of food and children's clothing to 14.5% for computer and IT consultancies. Choosing the correct sector is essential, as using the wrong rate could result in under or overpayment. It is worth noting that the limited cost trader rate of 16.5% applies to businesses that spend less than 2% of their turnover on goods, or less than GBP 1,000 per year on goods. This was introduced to prevent certain service-based businesses from gaining an unfair advantage from the scheme. In the first year of VAT registration, businesses receive a 1% discount on their flat rate percentage. This first year discount provides additional savings and is a strong incentive for newly VAT-registered businesses to consider joining the scheme immediately. The calculator below helps you determine exactly how much you could save by comparing the VAT you collect from customers with the flat rate amount you pay to HMRC.
To calculate your VAT flat rate savings: 1. Enter your quarterly turnover. This should be the total VAT-inclusive turnover for a typical quarter. Include all sales, even those at the zero rate, as the flat rate is applied to total turnover. 2. Set your flat rate percentage. Check the HMRC flat rate table for your specific trade sector. Common rates include 12% for management consultancy, 14.5% for computer consultancy, 10% for general building or construction, and 6.5% for retailing not listed elsewhere. If your goods cost less than 2% of turnover or less than GBP 1,000 per year, use the limited cost trader rate of 16.5%. 3. Toggle the first year discount. If you are in your first year of VAT registration, switch this on to receive a 1% reduction in your flat rate percentage. The discount applies for the first 12 months from the date of your VAT registration, not from when you joined the scheme. 4. Review the results. The calculator shows the VAT you collect from customers (the VAT fraction of your turnover), the flat rate amount you pay to HMRC, and the difference -- your quarterly and annual savings. The bar chart visualises the breakdown.
The VAT Flat Rate Scheme calculation works by comparing two amounts. First, the VAT you collect from customers: for a VAT-inclusive turnover of GBP 30,000, the VAT collected is GBP 30,000 multiplied by 20/120, which equals GBP 5,000. This is the VAT fraction -- the amount of VAT embedded in the gross price. Second, the flat rate payment to HMRC: using a 12% flat rate, you pay GBP 30,000 multiplied by 12%, which equals GBP 3,600. The profit (your saving) is the difference: GBP 5,000 minus GBP 3,600 equals GBP 1,400 per quarter, or GBP 5,600 per year. If you are in your first year of VAT registration, the effective rate drops to 11% (12% minus the 1% discount). The flat rate payment becomes GBP 30,000 multiplied by 11%, which equals GBP 3,300. Your quarterly saving increases to GBP 1,700, or GBP 6,800 annually. It is important to understand that under the Flat Rate Scheme, you cannot reclaim VAT on most purchases (except capital assets over GBP 2,000 including VAT). The flat rate is designed to account for this by being set at a level that approximates the net effect of charging and reclaiming VAT under the standard scheme.
The Flat Rate Scheme is not beneficial for every business. If your business has significant input VAT (for example, if you regularly purchase large amounts of goods or raw materials), you may reclaim more under the standard VAT scheme than you save on the flat rate. The scheme tends to benefit service-based businesses with low material costs most. The limited cost trader category was introduced in April 2017 to target businesses that were profiting significantly from the scheme while having very low input costs. If you spend less than 2% of your gross turnover on goods (or less than GBP 1,000 per year if greater), you must use the 16.5% limited cost trader rate, which typically eliminates any saving. You can join the Flat Rate Scheme online through your HMRC Government Gateway account or by writing to HMRC. You can leave the scheme at any time by writing to HMRC, and you must leave if your total income exceeds GBP 230,000. Moving between the flat rate and standard scheme has no penalty, so it is worth reviewing your position annually.