Building a new hall, centre or hub is one of the few moments a small charity meets genuinely large numbers, and VAT on construction is one of the largest of them. Get the "relevant charitable purpose" (RCP) certificate right before work starts, and the entire build can be zero-rated — no VAT charged in the first place, rather than VAT paid and reclaimed later. Get the building's actual use wrong at any point in the ten years that follow, and HMRC can claw back the whole relief in one go. Not a slice proportional to how the building was misused, or for how long — the whole amount, as if the zero-rating had never applied.

What qualifies as relevant charitable purpose

Under HMRC's VAT Notice 708, construction services on a new building are zero-rated if the charity will use it solely for a relevant charitable purpose — meaning either non-business use (the charity's own charitable activity, not run as a trade) or use as a village hall or similar, providing social or recreational facilities for the local community. A charity shop selling donated goods, a hired-out conference suite, or premises let commercially to a third party are business use and fall outside the relief. Before the contractor starts work, the charity must give them a written certificate, in HMRC's prescribed wording, confirming the building qualifies — the contractor is entitled to rely on that certificate, and it needs to be in place from the outset, not retrofitted once invoices have already been raised with VAT on them.

The 5% concession that makes mixed use workable

Very few charity buildings are used for absolutely nothing else. A community centre with a small café counter, or a hall that occasionally hires out for a private party, does not automatically lose the relief. HMRC accepts that zero-rating still applies if non-qualifying business use stays under 5% of the building's total use, measured on any basis that is fair and reasonable — time, floor space or income, not necessarily a strict square-footage split. Stay under that 5% line and the building is treated as though it were used solely for the qualifying purpose. Go over it, even briefly, and the building has moved into "change of use" territory.

The 10-year rule, and why the clawback is not proportional

If qualifying use drops and non-qualifying business use rises above the 5% tolerance — or the charity disposes of its whole interest in the building — within ten years of the building being completed, a self-supply charge arises. The charity must account to HMRC for VAT as if it had itself supplied the construction work at the standard rate, on the date the change of use happens.

The number that actually catches trustees out is how that charge is calculated. It is not apportioned to the extent of the business use, or to how many of the ten years were left when the change happened. HMRC's rule is blunt: the full amount of VAT that would originally have been charged on construction, absent the zero-rating certificate, becomes payable in one go, the moment the 5% line is crossed. A charity that lets 12% of a building's use slip into commercial hire in year three faces exactly the same clawback bill as one that does it on day one of year nine.

Worked example, illustrative figures. A charity builds a new community hall. Construction costs £350,000 plus VAT. Because a valid certificate is in place before work starts and the hall will be used solely for the charity's community purpose, the whole build is zero-rated — the charity never pays the £70,000 of VAT (20%) that would otherwise have been charged.

Three years later, income is tight and the trustees start hiring the hall out for weddings and corporate away-days. By the end of that year, commercial hire accounts for 12% of total use — comfortably over the 5% tolerance. Because this happens inside the ten-year window, a self-supply charge is triggered on the full original relief. The charity now owes HMRC £70,000 — not 12% of it, not a slice for the months the hall was over the line, but the entire amount originally relieved, calculated on the standard rate at the point of construction.

A charity building's VAT position over ten years: zero-rated and safe under 5% business use, then a full £70,000 clawback the moment use crosses that line, however small the overshoot £70,000 relieved at construction — what happens to it Ten-year window from completion of the building. Under 5% business use Relief stays in place — £0 owed, however many of the ten years pass. Business use passes 5% any time within 10 years Full £70,000 clawed back in one go — not apportioned to the overshoot. The charge is triggered the moment the 5% concession is breached, regardless of how small the excess or how many years remain.

Where this actually goes wrong

Almost nobody breaches the 5% concession deliberately. It happens because a hall that opened purely for community use starts, gradually and for good reasons, hosting the occasional paid external booking to help with running costs — the exact kind of income diversification our funding guide and grant budgeting content both encourage charities to consider. Nobody tracks the percentage because nobody remembers the 5% figure was ever a live constraint, three or five years after the certificate was signed. The building's income statement looks healthier every year the commercial hire grows — right up to the point someone reviews the original zero-rating and realises what crossing 5% actually costs.

What to do this week

  1. If your charity has a zero-rated building completed within the last ten years, find the original certificate and confirm the date construction completed — that date starts the ten-year clock, not the date you moved in or the date fundraising finished.
  2. Work out your building's actual non-qualifying business use on a fair, documented basis — hours booked, floor area, or income share — and keep that calculation refreshed at least annually, not done once and forgotten.
  3. If commercial hire or a trading activity is being discussed as a way to diversify income, model the 5% line into that decision before it starts, not after a year of bookings has already crept past it.
  4. If you are about to start a new build, get the RCP certificate wording right and confirm it with your contractor before the first invoice, not once work is already underway.

We review zero-rating certificates before construction starts, help charities track business use against the 5% concession year to year, and flag the ten-year clock well before a change of use turns into a six-figure VAT bill. It sits alongside the wider VAT position our VAT for charities guide covers. Fixed fees from £39 + VAT a month. Get started.