Replacing a boiler can be expensive, particularly when the old system breaks down without warning. There are several forms of support available in the UK, but they do not all pay for a like-for-like replacement.
Some schemes can help eligible households replace an inefficient or broken boiler, while others are designed to help homeowners move away from gas, oil or other fossil fuel heating. The type of help available depends on your circumstances, property and the heating system you have now.
Which Schemes Can Help With Boiler Replacement?
The boiler grant UK homeowners hear about most often may refer to different types of support, so it is worth checking what the funding actually covers.
ECO4 is one route that can support heating improvements for eligible households. Under the scheme, certain broken heating systems can be repaired or replaced when they meet the relevant requirements. A broken inefficient boiler may also be upgraded to an efficient replacement where the scheme rules allow it.
There is also the Boiler Upgrade Scheme, but this works differently. It does not provide a grant simply to replace an old gas boiler with another gas boiler. Instead, it helps property owners move from fossil fuel heating to eligible low-carbon systems such as air-to-water heat pumps, ground source heat pumps and certain biomass boilers.
Can You Get Help If Your Boiler Has Broken?
A broken boiler does not automatically qualify for a funded replacement.
Under ECO4, the condition of the heating system can be assessed to establish whether repair is practical and economical. Where an eligible heating system cannot reasonably be repaired, the scheme can allow a replacement subject to its rules and applicable limits.
If your boiler has recently failed, keep any paperwork from an engineer. Details about the fault, repair estimate and condition of the boiler can be useful during an assessment.
It is also worth checking whether the system is still covered by a warranty or another form of repair support before assuming that grant funding is the only option.
What If You Want To Replace A Gas Boiler With A Heat Pump?
This is where the Boiler Upgrade Scheme can become relevant.
For eligible properties in England and Wales, current BUS support includes:
- £7,500 towards an air-to-water heat pump
- £7,500 towards a ground source heat pump
- £2,500 towards an air-to-air heat pump in eligible residential properties
- £5,000 towards an eligible biomass boiler
- Up to £9,000 for certain heat pump installations in eligible off-gas-grid properties replacing oil or LPG heating
The grant is not paid directly to the homeowner as cash. An MCS-certified installer applies for the BUS voucher and the grant is taken off the cost you pay for the installation.
So, if your main aim is simply to install another gas boiler, BUS is not the relevant scheme.
Does Age Make Boiler Replacement More Affordable?
Age can be relevant to a household’s circumstances, but being older does not automatically create an entitlement to a free boiler.
Someone looking for boiler replacement for pensioners should check the actual eligibility criteria of the scheme rather than relying on claims that everyone over a particular age qualifies.
For ECO4, household circumstances can include factors linked to income, vulnerability and fuel poverty. The condition of the existing heating system and the property also matter.
A pensioner who does not qualify for one route may still be able to access another form of support, so it is worth checking more than one option.
What About Help With Other Home Improvements?
Boiler replacement is not always the only way to reduce heating costs.
The Warm Homes: Local Grant is available in England for eligible low-income households living in privately owned homes with an EPC rating of D to G. Depending on the assessment and local funding, support can include insulation, smart controls, solar panels and air source heat pumps.
This can be useful where a home has several energy efficiency problems. For example, replacing the heating system without dealing with substantial heat loss through the walls or roof may leave the household with higher heating demand than necessary.
What Should You Check Before Applying?
Before starting an application, find out which type of support matches your situation.
You will usually need information such as:
- The type of heating system currently installed
- Whether the boiler is working
- Your property ownership or tenancy status
- Your household circumstances
- Your property’s EPC rating
- Any evidence of previous repairs or heating faults
It is also worth checking the geographical limits of the scheme. ECO4 operates across Great Britain, while the Warm Homes: Local Grant applies in England. The Boiler Upgrade Scheme covers England and Wales.
Don’t start with the assumption that you need a free boiler. Start by finding out which type of heating support your property and household can actually receive.
Is Boiler Replacement Support Still Available?
Yes, but the timing and rules differ between schemes.
ECO4 currently runs until 31 December 2026 after its nine-month extension. It continues to support eligible energy efficiency and heating measures for qualifying households.
The Boiler Upgrade Scheme is also currently operating, but it is intended for eligible low-carbon heating installations rather than standard boiler replacements. Its current grant levels took effect on 21 July 2026.
That distinction is worth checking before choosing an installer or applying for funding.
Final Thoughts
There is no single boiler replacement grant that applies to every household. Support can come through different schemes, and each has its own purpose.
ECO4 may help eligible households with certain boiler and heating replacements, while the Boiler Upgrade Scheme can reduce the cost of changing from fossil fuel heating to an eligible heat pump or biomass system. Other programmes may focus on wider energy improvements.
Checking the condition of your current heating system, your household circumstances and the type of replacement you want is the sensible place to start.
