VAT on Electricity Bills: What the 0% Cut Means for Solar

Within days of becoming Prime Minister, Andy Burnham announced that VAT on domestic electricity bills will be cut from 5% to 0% for six months, starting 1 October 2026. It's a genuine tax cut worth acting on if you're trying to understand your bills — but the headline £45-a-year saving figure doing the rounds tells only part of the story, and it's worth being precise about what it does and doesn't change, including for anyone weighing up solar.

What's actually changing

VAT on qualifying domestic electricity supplies drops from the reduced rate of 5% to 0% for six months, from 1 October 2026 to 31 March 2027. The cut applies in Great Britain to household electricity, plus small businesses that already qualify for domestic-rate energy VAT, charities' non-business electricity use, and residential care homes. Northern Ireland is excluded — VAT on energy there is governed by the Windsor Framework, so the NI Executive receives comparable funding instead. The measure is expected to cost the Treasury around £850 million in 2026-27, funded partly by scrapping the previous government's Digital ID programme. Gas bills are not covered; this is an electricity-only measure.

Because the cut is a percentage rather than a fixed discount, its cash value moves with whatever the Ofgem price cap happens to be. Under the cap running from 1 July to 30 September 2026, the standard-tariff electricity unit rate is 26.11p per kWh including VAT. Strip out the 5% and the same unit costs 24.87p — a reduction of about 1.24p/kWh, or 4.8%. That 4.8% figure holds regardless of what the October cap turns out to be, because VAT is always the same proportion of the pre-tax price.

How much you'll actually save

The government's own £45-a-year figure is a reasonable estimate of the VAT saving in isolation — but it isn't the same as your bill going down by £45. Wholesale gas prices, pushed up through 2026 partly by conflict in the Middle East, have been driving the price cap upward faster than the VAT cut offsets it. Channel 4's FactCheck team calculated that even after the £45 VAT saving, a typical dual-fuel household's annual bill would still be roughly £49 higher than the year before, once the underlying rise in gas-linked prices is included. Martin Lewis at MoneySavingExpert reached a similar conclusion using shorter time windows: against a forecast 3.1% cap rise for October, the net benefit over the first three months could be closer to £20, and a further predicted rise in January could erode most of what's left. None of that makes the VAT cut worthless — households are paying less than they otherwise would — but it won't feel like a straightforward £45 windfall against last year's bill.

One reassurance: suppliers are expected to pass the full VAT saving through on every tariff, including fixed deals, and major suppliers have confirmed they will. That mirrors how the previous £150 policy-cost reduction was applied in April 2026, so there's little reason to expect suppliers to quietly absorb the difference. For the fuller picture of why bills keep rising even as individual measures like this chip away at them, see our guide on why UK energy bills are so high and our breakdown of how the Ofgem price cap actually works.

Two different 0% VAT policies — don't mix them up

It's easy to conflate this with the existing 0% VAT relief on installing solar panels and batteries, but they're separate measures with separate mechanics. The installation relief — covering solar PV, batteries, and other energy-saving materials fitted to residential property in Great Britain — has applied at 0% VAT since 2022 and is already scheduled to run to 31 March 2027, at which point it reverts to the standard 5% reduced rate. That relief cuts the upfront cost of buying and fitting a system. The new electricity VAT cut is a completely different tax, on a completely different thing: it reduces what you pay per kWh for the electricity you consume, not what you pay to install the equipment that generates it. Both happen to end within the same fortnight, which is a coincidence of timing rather than a coordinated policy, but it's worth knowing that a solar installer's zero-rated invoice and a supplier's zero-rated electricity bill are governed by entirely different rules.

Does this change the case for solar?

Barely, and the reasons why are more interesting than the headline number. Solar panels earn their keep by displacing electricity you'd otherwise buy from the grid. The value of each self-consumed kWh is set by the unit rate you avoid paying — so cutting that rate by 4.8% does, in theory, shave a little off solar's return. In practice, two things make the effect almost immaterial.

First, the cut is temporary and small. It reverts to 5% on 1 April 2027, while a solar installation is a 20-to-25-year asset; a six-month dip of 1.24p/kWh in the value of self-consumption is a rounding error against a typical payback period of 8–12 years.

Second — and this is the part the headline coverage misses — the discount window falls during the worst possible months for UK solar output. UK systems typically generate somewhere between 65% and 75% of their annual output between April and September, with only 25–35% falling in the October-to-March half of the year. The Energy Saving Trust puts a typical 4kWp system's output at around 500–600 kWh a month in summer, against roughly 120–200 kWh a month in the depths of winter — a three-to-four-fold swing. The VAT cut applies almost entirely to the half of the year when solar panels are producing the least electricity to self-consume in the first place.

Running the numbers on a typical 4kWp system generating around 3,600 kWh a year with roughly 35% self-consumption: if a quarter of that generation (about 900 kWh) falls in the October–March window, and 35% of it is used in the home rather than exported (around 315 kWh), the VAT cut reduces the value of that self-consumed electricity by roughly £3.90 across the entire six months — 315 kWh at 1.24p/kWh. Set against typical annual solar savings of £450–£660, that's well under 1%. Export income through the Smart Export Guarantee is unaffected altogether, since the VAT cut applies to what you buy from the grid, not what you sell back to it.

The honest takeaway: this isn't a reason to delay a solar decision, and it isn't a reason to rush one either. It's a modest, short-lived saving on the electricity you're still buying — solar's economics are set by your roof, your consumption pattern, and system cost, all of which are untouched by this measure. For the fuller cost-benefit picture, see our guide on how to reduce electricity bills in the UK.

The bottom line

The VAT cut is real, will show up on bills from October, and is worth having — households will pay a genuinely lower rate per kWh for six months, even if rising wholesale gas costs mean the overall bill trend keeps heading upward regardless. For solar owners and prospective buyers, treat it as background noise rather than a factor in the decision: the discount is small, temporary, and lands squarely in the months when panels do the least work.