VAT Partial Exemption and the De Minimis Limit Explained

A fully taxable business reclaims the VAT on everything it buys for the business. Partial exemption changes that. If you make some supplies that are exempt from VAT, such as certain financial services, insurance, education or the letting of residential property, you cannot reclaim the VAT that relates to those exempt activities. Once you are registered for VAT you become partly exempt, and the VAT on your purchases has to be split between what you can recover and what you cannot. This is separate from being able to reclaim VAT on ordinary business expenses, because here the question is not whether the cost is for the business but which kind of supply it supports.

Why exempt supplies block VAT recovery

VAT has a logic to it: you charge output tax on what you sell, and in exchange you reclaim input tax on what you buy to make those sales. Exempt supplies break that link. Because you do not charge VAT on an exempt supply, the system does not let you recover the VAT on the costs behind it. The classic examples are a business that sells taxable goods or services but also earns exempt income, such as a firm with both a trading arm and rental income from residential property, or a financial adviser making a mix of taxable and exempt supplies. Exempt is not the same as zero-rated: a zero-rated supply still carries full recovery, while an exempt one does not, which is a distinction worth keeping straight when you complete your VAT return.

Splitting your input tax into three

Partial exemption starts by sorting the VAT on your purchases into three pots. The first is input tax that relates wholly to taxable supplies, which you can recover in full. The second is input tax that relates wholly to exempt supplies, which you cannot recover at all. The third, and the one that needs a calculation, is residual or overhead input tax: the VAT on costs that support the business as a whole and cannot be attributed cleanly to either side, such as rent, accountancy fees, utilities and office costs.

It is the residual pot that the partial exemption calculation works on. You have to apportion it, recovering the proportion that fairly relates to your taxable activity and writing off the rest.

The standard method

Unless HMRC has approved something different, you use the standard method to apportion residual input tax. The standard method splits it by the value of your supplies: the recoverable share is the value of your taxable supplies divided by the value of your total supplies, expressed as a percentage and then rounded up to the next whole percent in most cases. If your taxable supplies are 80 percent of your total turnover, you recover 80 percent of the residual VAT and lose the other 20 percent.

You apply the recovery percentage in each VAT period and then carry out an annual adjustment at the year end, recalculating over the full year so that seasonal swings between periods even out. HMRC sets out the mechanics, the worked examples and the calculation rules in its guidance on partial exemption (VAT Notice 706), which is the authoritative reference for the method. Our partial exemption service handles this calculation, the annual adjustment and any special-method application for businesses across the borough.

A short worked example shows how the percentage falls out. Suppose a business has £400,000 of taxable supplies and £100,000 of exempt supplies in the period, so £500,000 of supplies in total. Its taxable proportion is £400,000 divided by £500,000, which is 80 percent. If its residual input tax for the period is £10,000, it recovers 80 percent, so £8,000, and the remaining £2,000 is the exempt portion of the residual that the de minimis test then decides the fate of. The taxable percentage is rounded up to the next whole number under the standard method, unless residual input tax averages more than £400,000 a month, in which case you round to two decimal places instead.

The de minimis limit

There is an important relief built into the rules. If your exempt input tax is small enough, you are treated as fully taxable and can recover all of it, including the exempt portion, as though partial exemption did not bite. This is the de minimis limit, and it is an all-or-nothing test rather than a sliding allowance.

You pass the de minimis test if your total exempt input tax is both not more than £625 a month on average, which works out at £7,500 a year, and not more than half of your total input tax for the period. Both conditions have to be met. If you are inside both limits you recover everything; if you breach either one you cannot recover any of the exempt input tax, so a business sitting close to the line needs to track it carefully across the year, not just period by period.

• Exempt input tax of no more than £625 per month on average (£7,500 a year).
• Exempt input tax of no more than 50 percent of your total input tax for the period.
• Both tests must be passed; failing either means none of the exempt input tax is recoverable.

Take the example above, where the exempt portion of residual input tax came to £2,000 for the period. Say that is the whole of the exempt input tax and the period is a quarter, so the £625 monthly average translates to a £1,875 ceiling for three months. The £2,000 exceeds that ceiling, so even though it is well under half of the £10,000 total input tax, the business fails the test and recovers none of the exempt input tax. Nudge the exempt input tax down to £1,800 for the quarter and it passes both limits, so the business recovers the lot and is treated as fully taxable for that period. That sharp cliff edge either side of the line is why close monitoring matters.

HMRC also offers two simplified tests that can save the full calculation. Under the first, you are de minimis if your total input tax is no more than £625 a month on average and the value of your exempt supplies is no more than half the value of all your supplies. The second works the same way but on total input tax less the part directly attributable to taxable supplies. They are a useful shortcut for businesses with modest exempt activity, set out in detail in the partial exemption guide alongside the standard method.

Because the de minimis position can move from one period to the next, the annual adjustment is where it is finally settled. A business that was de minimis in some quarters and not in others squares it all up once a year, which can produce either a further claim or a clawback.

When the standard method is not fair

The value-based standard method suits most partly exempt businesses, but it can give a result that does not reflect how costs are actually used, for instance where high-value, low-margin taxable sales sit next to low-value exempt income. In those cases you can apply to HMRC to use a special method, an alternative basis of apportionment such as floor area, staff numbers or transaction counts that better matches your costs to your supplies.

A special method cannot simply be adopted: it needs HMRC's prior written approval and you have to declare that it gives a fair and reasonable recovery. That makes it a considered step rather than a quick switch, and it is usually worth modelling against the standard method first to confirm it genuinely improves your position.

Getting the attribution right from the start

The single biggest driver of how much VAT you keep is the direct attribution stage, deciding which costs are wholly taxable, wholly exempt or genuinely residual. Sweeping too much into the residual pot dilutes your recovery, while attributing a cost to taxable supplies that really belongs to exempt activity overstates your claim and exposes you in an inspection. Clean bookkeeping that tags purchases to the right supply type is what makes the rest of the calculation defensible. The professional body ICAEW maintains a useful overview of VAT technical guidance for businesses navigating these areas.

Common questions about partial exemption

Does partial exemption apply if all my sales are taxable?

No. Partial exemption only applies once you make some exempt supplies. A wholly taxable business recovers its input tax in full and never needs to apportion. The rules start to matter the moment exempt income, such as residential rent or certain financial or insurance supplies, enters the picture.

Is zero-rated income treated the same as exempt income?

No, and the difference matters. Zero-rated supplies are taxable at a rate of 0 percent and carry full input tax recovery, so they do not trigger partial exemption. Exempt supplies carry no recovery on their related costs. Mislabelling one as the other is a frequent and costly error.

Do I have to recalculate at the year end?

Yes. Alongside the period calculations you carry out an annual adjustment that recalculates recovery and de minimis status across the whole year. It smooths out quarter-to-quarter variation and produces a final figure, which may mean reclaiming more or repaying some of what you recovered in-year.

Partial exemption is one of the areas where the VAT can quietly leak away through poor attribution or a missed de minimis test. If your business makes a mix of taxable and exempt supplies around Harrow, send us a rough split of your income and costs through the form on this page and we will work out your recovery position, check whether the standard method serves you or a special method would do better, and keep the annual adjustment right.