Business Energy VAT Rules UK: When You Pay 5% vs 20%

VAT on UK business energy is one of the most quietly expensive lines on a small-business bill, and one of the most commonly overpaid. The standard rate is 20 percent. The reduced rate is 5 percent. Whether you pay 20 or 5 percent depends on rules that HMRC publishes plainly but most suppliers do not apply automatically. Filing a VAT Declaration is the difference between the two rates on every bill until your circumstances change.

This guide explains the rules, the qualifying thresholds, how to file the declaration, and where the common mistakes happen.

The legal basis for reduced-rate VAT on energy

The reduced rate of VAT on fuel and power is set in Schedule 7A, Group 1 of the Value Added Tax Act 1994. It applies to supplies of fuel and power for domestic use and for non-business use by a charity. The detail of what counts as domestic, what counts as de minimis non-domestic use, and how the qualifying use threshold is calculated is in HMRC Notice 701/19.

The two routes to the 5 percent rate that most affect businesses are the de minimis quantity rules and the qualifying use rules. They are different tests with different evidence requirements. Some businesses qualify under one and not the other.

The de minimis rules: low usage means automatic 5 percent

The simplest route to the reduced rate is the de minimis quantity. If your business uses less than a defined monthly threshold of energy, the supply is treated as domestic for VAT purposes regardless of the actual end use. The thresholds, set in HMRC Notice 701/19 and unchanged for many years, are:

• Electricity: 1,000 kWh per month at any single supply point.
• Gas: 4,397 kWh per month at any single supply point, equivalent to 150 therms.

If your monthly average sits below the threshold across a 12-month period, the entire supply qualifies for the 5 percent rate. If your usage crosses the threshold in any month, the whole month is treated as fully business at the 20 percent rate. The boundary is per-meter, not per-account: a business with three meters might have one qualifying and two not.

For very small businesses, particularly one-person operations working from a small commercial unit, this rule alone is enough to drop the VAT bill by 15 percentage points without any further paperwork. The supplier should apply it automatically once it observes the consumption history, but in practice many do not. Check your bill. If you are paying 20 percent on a meter consistently below the threshold, you can claim refunds for up to four years.

The qualifying use rules: 60 percent test

The second route is the qualifying use rule. If at least 60 percent of the energy supplied through a meter is used for a domestic or non-business charitable purpose, the entire supply qualifies for the 5 percent rate, including the portion used for business. If the qualifying use is less than 60 percent, only that proportion qualifies, and the bill is split.

The typical situations that trigger this rule:

• A residential property partly used as a home office. The home-use portion drives the calculation.
• A mixed-use building where part of the premises is residential accommodation and part is commercial. A pub with a flat above, for example, or a small B&B.
• A charity that uses a building partly for charitable activities and partly for trading.
• A care home or sheltered housing where most consumption is residential in character.

The 60 percent figure is the threshold for the whole supply to qualify. Below that, the supply is apportioned. The supplier will charge the appropriate split rate on each bill once it has accepted the declaration.

What counts as qualifying use

HMRC defines qualifying use in Notice 701/19. The key categories:

• Use in a dwelling, including a house, flat, or any building designed as a private residence.
• Use in a building used by a charity for non-business purposes. Charity trading subsidiaries do not qualify.
• Use in residential accommodation such as a children's home, a care home, a hospice, or a residential school.
• Use in self-catering holiday accommodation where the let is short-term and the property is not a permanent residence.

A business that operates from a building used as the proprietor's residence usually qualifies for the reduced rate on the residential portion. A small business operating from a residential address can in principle claim qualifying use, though the calculation needs to be evidenced.

How to file the VAT Declaration

The reduced rate is not applied automatically except for clear de minimis cases. You need to file a VAT Declaration with your supplier. Each supplier has its own form, but they all collect the same information:

• Your business name, address, and VAT registration number if applicable.
• The meter number or MPAN/MPRN at the relevant supply point.
• The qualifying use percentage you are claiming.
• A description of how the qualifying use arises.
• An effective date from which the reduced rate should apply.
• A signed declaration that the information is correct.

Submit the form to your supplier's VAT team, usually through a specific email address on the supplier's website. The supplier will update its billing system to apply the appropriate rate going forward and will, on request, issue a refund or credit note for VAT incorrectly charged in earlier billing periods.

Backdating and refund claims

HMRC permits VAT refunds for up to four years from the date of the overcharge. If you have been on the 20 percent rate when you should have been on the 5 percent rate, you can claim a refund of the VAT difference for any bill issued in the previous four years.

The claim is made by:

• Submitting the VAT Declaration with an effective date as far back as four years.
• Providing supporting evidence of qualifying use over that period.
• Asking the supplier to issue credit notes or refunds for the overcharge.

The supplier will validate the claim, typically asking for additional evidence such as Council Tax bills proving residential use, planning permission documents, or occupancy records. Refunds usually process within 60 to 90 days once evidence is accepted.

When VAT goes back up

Your circumstances can change. The supplier must be informed when:

• The qualifying use falls below the threshold claimed.
• The premises change use, for example a flat above a shop becoming office space.
• The meter is reconnected after a period of non-domestic use that did not qualify.
• The business is transferred or the customer of record changes.

Failure to notify the supplier of a change that affects VAT treatment is an HMRC matter. The supplier passes the declared status through to HMRC by way of charging the appropriate rate. Knowingly maintaining a reduced-rate declaration when the qualifying use no longer applies is a misdeclaration.

The Climate Change Levy interaction

If your supply qualifies for the 5 percent reduced-rate VAT under the qualifying use or de minimis rules, it is also automatically exempt from the Climate Change Levy. The levy is charged per kWh on business energy supplies that are not reduced-rate for VAT. Domestic and qualifying charitable supplies are outside its scope.

This is a useful double benefit. A business that successfully claims reduced-rate VAT also stops paying the Climate Change Levy on the same supply, saving an additional 0.775 pence per kWh on electricity and 0.672 pence per kWh on gas at 2025 to 2026 rates.

Common mistakes that cost businesses money

The patterns we see most often:

• A home-based sole trader paying 20 percent VAT on their entire electricity supply because the supplier treats the meter as a business account.
• A landlord with a small portfolio paying 20 percent VAT on the standing charge for empty residential properties between tenancies.
• A charity paying full VAT on premises used substantially for non-business charitable activity because no declaration has been filed.
• A bed and breakfast or holiday let operator paying 20 percent because the supplier classifies the supply as business by default.
• A small care provider paying 20 percent because no one ever asked about VAT treatment when the supply was set up.

In every case the fix is the same: file the VAT Declaration, evidence the qualifying use, and request backdated relief.

Frequently asked questions

Editorial disclaimer: This guide summarises HMRC published rules on reduced-rate VAT for fuel and power and is not a substitute for advice from your accountant or from HMRC. The thresholds and definitions reflect HMRC Notice 701/19 current at publication. Confirm your eligibility against the latest guidance before filing a declaration.

Is business energy zero-rated for VAT?

No. Business energy is either 20 percent or 5 percent VAT. There is no zero rate for fuel and power supplies in the UK.

Can I claim back the VAT I paid on business energy?

If your business is VAT registered, you can reclaim the VAT you pay on business energy as input tax in the normal way, regardless of whether the rate is 5 percent or 20 percent. The reduced-rate question is separate from VAT recovery.

How much can I save with a successful VAT Declaration?

The headline saving is 15 percentage points of VAT plus the Climate Change Levy on the affected portion of your supply. For a small business with annual energy spend of £3,000, the combined saving is typically £500 to £600 per year.

Will my supplier apply the 5 percent rate automatically?

Suppliers should apply de minimis treatment automatically once they observe low consumption history. They rarely apply qualifying use treatment without a written declaration. Check your bills and file the declaration if needed.

Do I have to be VAT registered to claim reduced-rate VAT?

No. VAT registration is irrelevant to the reduced rate on fuel and power. The reduced rate is about the use of the energy, not the VAT status of the customer.

How we verified this

The qualifying thresholds and rules described here reflect HMRC Notice 701/19 and Schedule 7A Group 1 of the Value Added Tax Act 1994. Climate Change Levy interactions and rate values reflect HMRC published rates current at publication. The four-year refund window reflects the standard VAT correction limit in Section 80 of the Value Added Tax Act 1994.

Sources

• HMRC Notice 701/19: VAT on fuel and power
• Value Added Tax Act 1994, Schedule 7A, legislation.gov.uk
• GOV.UK: Climate Change Levy rates and exemptions
• Value Added Tax Act 1994, Section 80, legislation.gov.uk

For more context on how your bill is constructed and where else costs can be reduced, see business energy bills explained and our guide to the Climate Change Levy.