Can You Combine the BUS Grant with Other Government Schemes?

Yes, you can combine the BUS grant with several other government schemes, but not all of them. The key rule is that you cannot use two grants to fund the same measure on the same property. So while you can't double-dip on heat pump funding specifically, you can absolutely pair the £7,500 Boiler Upgrade Scheme grant with schemes that cover different improvements like insulation, draught-proofing, or solar panels.

How the £7,500 BUS Grant Works in 2026

The Boiler Upgrade Scheme provides a £7,500 upfront discount on the cost of an air source heat pump, and up to £7,500 for a ground source heat pump. The grant is applied directly by your MCS certified installer, so you never have to claim it yourself or wait for a rebate.

The scheme is funded until March 2028, and as of 2026 there's still budget available. But there's a catch that trips people up: the BUS grant can only be used for heat pump installation. It won't cover insulation, new radiators, or any other improvement your home might need before or alongside the install.

That's exactly why combining it with other schemes makes so much sense. A heat pump works best in a well-insulated home, and other government programmes exist to help you get your property up to scratch without paying full price.

Which Government Schemes Can You Combine with the BUS Grant?

Here's where things get practical. Several schemes sit alongside the BUS grant without any conflict, because they fund different types of work.

ECO4 and the Great British Insulation Scheme (GBIS)

Both of these schemes fund insulation measures like loft insulation, cavity wall insulation, and solid wall insulation. Since they don't cover heat pumps, there's no overlap with the BUS grant. If you qualify for ECO4 (typically based on income, benefits, or your property's EPC rating), you could get your walls and loft insulated for free or at heavily reduced cost, then apply the BUS grant to cover your heat pump.

Frankly, this is one of the smartest combinations available. Insulating your home first means your heat pump can be smaller, cheaper, and more efficient.

Local Authority Grants and Home Upgrade Grants (HUG2)

The Home Upgrade Grant is aimed at lower-income households in off-gas-grid properties with an EPC rating of D, E, F, or G. HUG2 can fund insulation, solar panels, and even heat pumps.

Here's the important bit: if HUG2 is funding your heat pump, you cannot also claim the BUS grant for the same heat pump. But if HUG2 covers your insulation and the BUS grant covers your heat pump, that's perfectly fine. The two schemes can work together as long as they're paying for different things.

Solar Panel Schemes and the Smart Export Guarantee

Adding solar PV to your home alongside a heat pump is a genuinely good idea. Solar panels generate electricity during the day, which can power your heat pump for free. You can claim the BUS grant for the heat pump and install solar panels separately, whether self-funded or through any available local authority scheme.

The Smart Export Guarantee pays you for surplus electricity you export to the grid. This isn't a capital grant at all, so it sits happily alongside the BUS grant with no conflict.

Which Schemes Can't Be Combined with the BUS Grant?

The main restriction is simple: you can't claim two government grants for the same heat pump installation.

If your heat pump is funded through HUG2, ECO4 (in rare cases where ECO4 funds a heat pump), or any other public grant, you can't also apply the BUS grant to that same piece of equipment. The government calls this "double funding" and it's explicitly not allowed.

Also worth knowing: if your property has already received a heat pump through a publicly funded scheme, you generally can't get BUS funding for a replacement or second system.

The rule isn't complicated. One grant per measure. Different grants for different measures on the same property is fine.

A Real Example: How One Homeowner Could Save Over £15,000

Let's say you own a 1960s semi-detached house with solid walls, no loft insulation, and an ageing gas boiler. Your EPC rating is E.

Here's how stacking schemes could work for you in 2026:

• You qualify for the Great British Insulation Scheme and get cavity wall insulation installed at no cost, saving around £2,000 to £3,500.
• Through ECO4, you receive free loft insulation worth approximately £500 to £1,000.
• With better insulation in place, your installer recommends a 7kW air source heat pump rather than a larger 10kW unit. The total installed cost comes to around £10,000.
• The BUS grant covers £7,500 of that, leaving you with £2,500 to pay.

So instead of spending £14,000 or more on insulation and a heat pump, you're paying £2,500. That's the power of combining schemes properly.

Will every homeowner get results like this? No. Eligibility varies, and not everyone will qualify for ECO4 or GBIS. But even partial support from one extra scheme on top of the BUS grant can make a real difference.

"I Don't Think I'll Qualify for Anything Else" — Don't Assume That

This is the most common objection we hear. People assume that because they own their home and have a decent income, they won't qualify for any support beyond the BUS grant.

That's not always true. The Great British Insulation Scheme has a "general eligibility" group that includes homes in council tax bands A to D (in England) regardless of income. If your home has poor insulation, you may qualify even if you're not on benefits.

Your local council may also run its own energy efficiency programmes. These vary widely across the country, but some are surprisingly generous. A quick phone call to your council's housing or energy team is worth the five minutes it takes.

And don't forget: the BUS grant itself has no income test. If you own the property and it's not a new build, and the work is done by an MCS certified installer, you can apply. Have you actually checked what you're eligible for, or just assumed?

How to Make Sure Your Grants Don't Conflict

Before you commit to any combination of schemes, get clear written confirmation from each scheme administrator that your planned work is eligible. Your MCS installer should be able to advise on BUS grant compatibility, as they handle the application.

For ECO4 and GBIS, your energy supplier or their appointed contractor will assess your property. Make sure they know you're also planning a heat pump through BUS, so everyone's on the same page.

Keep all paperwork. If an auditor ever checks, you'll want to show clearly that each grant funded a separate measure. This isn't usually a problem, but being organised saves hassle later.

Frequently Asked Questions

Can I get the BUS grant and ECO4 at the same time?

Yes, as long as they fund different things. ECO4 typically covers insulation measures while the BUS grant covers the heat pump. You cannot use both to pay for the same heat pump installation.

Can you combine the BUS grant with the Great British Insulation Scheme?

Yes. GBIS funds insulation improvements, and the BUS grant funds heat pump installation. These two schemes work well together because insulating your home first makes the heat pump more effective and potentially cheaper.

Do I need to get insulation before applying for the BUS grant?

You don't have to, but it's strongly recommended. A well-insulated home needs a smaller heat pump, which costs less. Your installer will assess your property's heat loss and may suggest insulation improvements before sizing the system.

Can I use the BUS grant if I've already had a government grant for insulation?

Yes. Having received insulation funding through ECO4, GBIS, HUG2, or a local authority scheme does not disqualify you from claiming the BUS grant for a heat pump. The restriction only applies to claiming two grants for the same measure.

Is the BUS grant means tested?

No. The Boiler Upgrade Scheme has no income requirements or means testing. Any eligible homeowner in England or Wales with a qualifying property can apply through an MCS certified installer, regardless of household income.

Find an MCS Certified Installer Near You

Stacking the BUS grant with other schemes is one of the best ways to bring down the total cost of switching to a heat pump. But it all starts with finding a qualified installer who can guide you through the process. Use our directory at heatpumpinstallerdirectory.co.uk to find a local MCS certified heat pump installer who can assess your property, advise on grant combinations, and handle the BUS grant application on your behalf.