The 0% VAT on electricity is worth roughly £45 a year to the average household — and it makes solar panels worth it in October 2026 just as much as they were before. Here's why that small tax saving doesn't materially change the long-term maths, and what actually determines whether solar stacks up for a house like yours.
What exactly has changed with electricity VAT?
From 1 October 2026, the government cut VAT on domestic electricity from 5% to 0%. According to Ofgem's price cap announcement, without this cut the typical dual-fuel bill would have been around £45 a year higher. The measure is currently set to run until 31 March 2027 — it is not a permanent change.
Gas stays at 5% VAT. The cut is electricity only, so gas-heated homes get the benefit only on the electricity portion of their bill.
One important detail that has confused a lot of people: the VAT cut is already baked into the October price cap figure of £1,723. You won't get an extra £45 off on top — it's already there in the unit rate of around 26.32p/kWh that Ofgem confirmed from 1 October.
So does the electricity VAT cut make solar panels less worth it?
No — not in any meaningful sense. The VAT cut reduces what you'd pay for grid electricity by roughly 5p in every £1. But solar's financial case rests on what you pay over the 25-year life of the panels, not just in this particular six-month window. A temporary tax relief that may not be renewed in April 2027 is simply too small and too short-lived to change the decision.
Here's the honest comparison. At a unit rate of around 26.32p/kWh (October cap, including 0% VAT), every kWh your solar panels generate and you use yourself is worth roughly 26p. Before the VAT cut, with the previous 26.11p rate including 5% VAT, each self-consumed kWh was worth roughly the same. The difference per kWh is fractions of a penny. The bigger forces — wholesale energy prices, your own consumption, roof orientation, panel quality — move the numbers far more than a 5% VAT shift on electricity ever could.
The actual numbers: a worked example for a typical 3-bed home
Let's put some real figures around this. This is a worked example — your own savings will depend on your roof, your usage, and how much you're home during the day.
- Typical system: A 3.5–4kWp solar installation
- Typical installed cost: Around £6,000–£8,000 (depending on system size, property and installer — see our guide to solar panel costs UK 2026 for a full breakdown)
- Typical bill savings: The Energy Saving Trust puts typical savings for a home with a 3.5kWp solar system at up to around £610 a year — though households that are out during the day with no battery will save less, closer to the lower end of that range
- Smart Export Guarantee (SEG) income: On top of bill savings, surplus electricity you export to the grid earns you money under the SEG. Flat-rate SEG tariffs currently run from around 4p to 15p per kWh, with some time-of-use tariffs paying more at peak times — see our guide to the best SEG rates in 2026 for the current landscape
- Payback: Based on Energy Saving Trust figures, a typical home can reach break-even inside 12 years — and panels are designed to last 25 years or more
Now here's the VAT cut in context. If the 0% VAT saves you around £45 a year on your overall electricity bill, removing that saving — if the rate returns to 5% in April 2027 — shifts a typical payback from, say, 11 years to 11 years and a few weeks. It's genuinely not the number that should be driving your decision.
What actually determines whether solar is worth it for your home?
The things that really move the numbers have nothing to do with VAT:
How much electricity you use, and when. Solar generates during daylight hours. If you're home in the day — retired, working from home, with a heat pump or EV to charge — you can self-consume a much higher proportion of what your panels produce. Every unit you use yourself saves you the full import rate (around 26p/kWh at current prices). Every unit you export earns a fraction of that. High self-consumption is the single biggest lever on payback time.
Your roof. South-facing roofs at a reasonable pitch produce the most. East or west-facing roofs still work — output is typically lower, but it's rarely a deal-breaker. North-facing roofs are much harder to justify. Heavy shading from trees or chimneys can cut output significantly. Our guide Is Solar Right for My House? The Honest 5-Factor Test runs through these in detail.
Whether you're on the right energy tariff. Pairing solar with a time-of-use tariff can make a meaningful difference to how much you save and earn. It's worth reading our guide to the best energy tariff for solar panels in 2026 before installation.
The quality and sizing of the system. Cheap quotes often mean smaller panels, a weaker inverter, or corners cut on installation. Getting multiple quotes from MCS-certified installers — and knowing how to compare them — matters more than any tax change.
When is solar NOT worth it? (Being honest here)
Solar genuinely isn't right for every home. If your roof faces north, is heavily shaded for most of the day, or would need expensive structural work or re-roofing first, the numbers can easily stop adding up. If you have a very small electricity bill to start with, the savings will be correspondingly smaller. If you're planning to sell in the next few years and your local market doesn't reward solar in the asking price, the payback window matters more. None of this is reason to panic — it's just reason to check properly before committing.
The VAT cut doesn't change any of these calculations in either direction. It's a small, temporary benefit on your grid electricity bill. It doesn't make a bad-roof decision suddenly viable, and it doesn't make a good-roof decision any less attractive.
What about when the 0% VAT ends in March 2027?
The current 0% rate on electricity is confirmed until 31 March 2027. After that, the government will decide whether to extend, amend or let it lapse back to 5%. Nobody outside the Treasury knows which way that will go.
Here's what we do know: wholesale energy prices remain volatile, the energy price cap has risen in three of the last four quarters, and long-term energy price forecasts consistently point upward rather than downward. If the VAT exemption ends in April 2027 and electricity reverts to 5% VAT, the case for solar gets fractionally stronger again — not weaker.
Separately, if you're thinking about installing solar panels, there's a genuine deadline worth knowing about: the 0% VAT on solar panel installation itself is due to expire in March 2027. That's a more significant financial consideration than the electricity VAT story — and our guide 0% VAT on Solar Panels: What to Do Before March 2027 explains what's at stake and what action to take.
The bottom line
The 0% electricity VAT is a welcome short-term relief on bills — worth roughly £45 a year according to Ofgem's own figures. It is not, by any stretch, a reason to put solar on the back burner. The fundamentals haven't changed: panels produce free electricity for 25 years or more, the SEG pays you for what you export, and a well-sized system on a suitable roof typically pays itself back in under 12 years on Energy Saving Trust estimates — leaving well over a decade of very low-cost electricity ahead.
If you're weighing up solar right now, the question to ask isn't "has the VAT cut reduced the case for it?" — it's "is my roof, my usage, and my household the right fit?" That's the question worth getting a proper answer to.
FairSolar connects homeowners with vetted, MCS-certified local installers, and getting quotes is free and comes with no obligation. If you'd like a clearer picture of what solar could actually save a home like yours, get free quotes here — it's the most reliable way to see real numbers for your specific property.
Frequently asked questions
Does the 0% VAT on electricity make solar panels less worth it in 2026?
No, not materially. The VAT cut is worth around £45 a year to the average household, according to Ofgem — a small fraction of the typical bill savings solar panels deliver over their 25-year lifespan. It doesn't change the fundamental payback calculation in any meaningful way.
How long does the 0% electricity VAT last?
The 0% VAT rate on domestic electricity is confirmed from 1 October 2026 to 31 March 2027. After that, the government will decide whether to extend it. Gas remains at 5% VAT throughout.
What is the electricity unit rate right now under the price cap?
Under the Ofgem price cap confirmed from 1 October to 31 December 2026, the typical electricity unit rate is around 26.32p per kWh. This already includes the 0% VAT — you won't get an additional reduction on top of it.
What does the Smart Export Guarantee pay in 2026?
SEG rates vary by supplier. Widely available flat-rate tariffs currently run from around 4p to 15p per kWh for electricity you export to the grid. Time-of-use tariffs can pay more at peak times. You need an MCS-certified installation and a smart meter to qualify.
Is there a deadline for getting 0% VAT on solar panel installation?
Yes — and this is separate from the electricity VAT story. The 0% VAT rate on solar panel installations themselves is currently due to expire in March 2027. Installing before that deadline could save a meaningful amount on the upfront cost, depending on your system size.