Of all the lines on a UK business energy bill, VAT is the one that gets the least attention — and the one where the biggest savings are quietly being missed. Most SMEs pay 20% VAT on electricity and gas because that is the standard business rate. But thousands of small businesses, charities and mixed-use properties legally qualify for the reduced 5% rate. They just do not know it.
If your business fits one of the groups below, you may have been overpaying. And you may be able to reclaim up to four years of overpaid VAT.
HMRC sets two main routes to the reduced 5% rate on business energy.
The first is the low-usage (de minimis) threshold. If your business uses very small amounts of energy — broadly, less than 33 kWh of electricity per day on average, or less than 145 kWh of gas per day — your bills automatically qualify for 5% VAT, regardless of what your business does. Your supplier should apply it without you having to claim. But in practice, suppliers do not always identify low-usage sites correctly, especially on multi-site accounts or after a meter change.
The second is qualifying use. If at least 60% of the energy used at a site goes to qualifying purposes — typically domestic use or non-business charitable use — the whole supply qualifies for 5% VAT. Below 60%, the qualifying portion is charged at 5% and the rest at 20%.
In our experience, three groups of UK businesses are the most likely to be on the wrong VAT rate.
Charities and non-profits. A registered charity using premises for non-business activity — community use, volunteer-run operations, certain education and care — can claim 5% VAT on the qualifying portion of its supply. Suppliers do not apply this automatically because they cannot see how the building is being used.
Mixed-use properties. Pubs with living quarters above, B&Bs, care homes, residential nursing, student accommodation, and shops with a flat upstairs all typically have a residential element. That portion qualifies for 5%. Many SMEs in this position are still being billed at 20% on the whole supply.
Very small operations. Sole traders, home-based businesses, micro-enterprises with a single small premises, and seasonal traders often sit comfortably under the de minimis threshold without realising. If your annual usage is under about 12,000 kWh of electricity, it is worth checking your bill before you do anything else.
The mechanism is a VAT declaration certificate. Your supplier will have a form — often called a "VAT declaration" or "certificate of declaration" — that you complete to confirm the qualifying use of the supply.
A few things worth knowing. You can backdate a claim by up to four years. If you have been on 20% VAT and were eligible for 5%, you can reclaim the overpaid VAT for up to four years of past bills directly from your supplier, not from HMRC. Each site is assessed individually, so if you have multiple premises you will need a separate declaration for each one.
There is a second saving most people miss. Sites that qualify for 5% VAT on the de minimis or qualifying-use rules also automatically qualify for an exemption or reduced rate of the Climate Change Levy — a separate and additional saving that shows up on the same bill.
Pull out your most recent business electricity bill and look at the VAT line. If it shows 20% and you sit in any of these positions — charity, mixed-use site, sole trader, micro-business, seasonal use, low usage — it is worth a five-minute conversation.
At Utilities Group we review the VAT and CCL position on every bill we look at, not just the unit rate. If you are eligible for the 5% rate we will help you get the declaration submitted to your supplier and pursue any backdated reclaim you are entitled to. It is not headline-grabbing money, but for a small business, a backdated four-year reclaim plus an ongoing 15-percentage-point VAT saving can be one of the single biggest wins on the energy bill.
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