grants

ECO4 and Heat Pumps: Can You Get a Free Heat Pump in the UK?

James Mitchell |

TL;DR

  • ECO4 offers free heat pumps to eligible UK households with EPC ratings D-G, but strict criteria apply (benefits or low income via LA Flex).
  • Not all "free" heat pumps are truly free - some schemes require top-up payments or only cover part of the cost.
  • Boiler Upgrade Scheme (BUS) provides £7,500 grants for heat pumps, but ECO4 is better for low-income households.
  • LA Flex rules allow councils to extend eligibility to households earning under £31,000 - check your local authority’s criteria.
  • Your home must be "heat pump ready" - poor insulation or old radiators may require additional upgrades, which ECO4 can sometimes fund.

In 2024, UK households face a stark choice: stick with expensive gas boilers or switch to a heat pump. With energy bills still 54% higher than pre-crisis levels (OFGEM, 2024), the appeal of a free or heavily subsidised heat pump is undeniable. But can you really get a heat pump for free under the ECO4 scheme? The answer is nuanced.

ECO4, the government’s Energy Company Obligation programme, is designed to help low-income and vulnerable households improve energy efficiency. Heat pumps are a key part of this, but eligibility is tightly controlled. Meanwhile, the Boiler Upgrade Scheme (BUS) offers £7,500 grants to any homeowner, regardless of income - but only if you can afford the remaining costs. This guide cuts through the confusion, explaining who qualifies for a free heat pump, how ECO4 compares to BUS, and what steps you need to take to secure funding.

We’ll cover the exact eligibility criteria, the application process, and the hidden costs you might not expect. By the end, you’ll know whether ECO4 is the right path for you - or if another grant could save you more.

Is a Heat Pump Really Free with the ECO4 Scheme?

The idea of a "free heat pump" is compelling, but the reality is more complex. Under ECO4, energy suppliers fund energy efficiency improvements for eligible households, including heat pumps. However, "free" doesn’t always mean fully free. Here’s what you need to know:

What "Free" Actually Means Under ECO4

ECO4 doesn’t hand you cash - it obliges energy suppliers (like British Gas, E.ON, or Octopus) to fund improvements in eligible homes. For heat pumps, this typically means:

  • 100% funding for the heat pump itself (air source or ground source).
  • Partial or full funding for necessary upgrades, such as insulation or new radiators, if your home isn’t "heat pump ready".
  • No upfront cost to you, provided you meet the eligibility criteria.

However, there are caveats:

  • Top-up payments: If your home needs additional work (e.g., a new hot water cylinder or upgraded radiators), you may need to contribute.
  • Not all heat pumps are covered: ECO4 prioritises air source heat pumps (ASHPs) over ground source (GSHPs), as they’re cheaper to install. If you want a GSHP, you might need to cover the extra cost yourself.
  • Supplier discretion: Energy companies decide which measures to fund based on cost-effectiveness. A heat pump might not always be the most efficient option for your home.

How ECO4 Compares to the Boiler Upgrade Scheme (BUS)

The Boiler Upgrade Scheme (BUS) offers a flat £7,500 grant for heat pumps, but it’s not means-tested. Here’s how the two schemes stack up:

FactorECO4Boiler Upgrade Scheme (BUS)
EligibilityLow-income households, benefits recipients, or LA Flex criteriaAny homeowner (no income or benefits requirement)
Grant amount100% funding (potentially free)£7,500 (fixed)
Heat pump typeAir source or ground source (supplier discretion)Air source or ground source
Additional fundingMay cover insulation, radiators, or other upgradesNo additional funding
Application processVia energy supplier or installerVia MCS-certified installer
End date31 March 202631 March 2028

Key takeaway: ECO4 is better for low-income households who can’t afford any upfront costs, while BUS is simpler but requires you to cover the remaining balance (typically £2,000-£5,000 for an ASHP).

Check Your Eligibility: ECO4 vs. Boiler Upgrade Scheme (BUS)

Not all grants are created equal. Your eligibility for ECO4 or BUS depends on your income, benefits status, and property type. Here’s how to determine which scheme is right for you.

Who Qualifies for ECO4?

ECO4 targets two groups:

  1. Households receiving qualifying benefits (e.g., Universal Credit, Pension Credit, Income Support).
  2. Low-income households under Local Authority Flexibility (LA Flex) rules, where councils can extend eligibility to those earning under £31,000.

Qualifying Benefits for ECO4

You may be eligible if you receive any of the following:

  • Universal Credit
  • Pension Credit (Guarantee Credit or Savings Credit)
  • Income-based Jobseeker’s Allowance (JSA)
  • Income-related Employment and Support Allowance (ESA)
  • Income Support
  • Child Tax Credit
  • Working Tax Credit
  • Housing Benefit
  • Child Benefit (with income thresholds - see below)

Important: If you receive Child Benefit, your eligibility depends on your household income:

  • Single parent: £19,800 (first child) + £3,300 (each additional child).
  • Couple: £24,600 (first child) + £3,300 (each additional child).

LA Flex: The Low-Income Route

If you don’t receive benefits but earn under £31,000, you might still qualify under LA Flex. Each council sets its own rules, but common criteria include:

  • Household income below £31,000 (varies by council).
  • Property EPC rating of D, E, F, or G.
  • Vulnerable occupants, such as elderly residents, children under 5, or those with long-term health conditions.

Example: In Manchester, LA Flex covers households with an income under £31,000 and an EPC rating of E, F, or G. In contrast, Cornwall’s threshold is £28,000 for the same EPC ratings.

Property Requirements for ECO4

Your home must:

  • Have an EPC rating of D, E, F, or G (check your EPC certificate).
  • Be suitable for a heat pump (more on this in the "Heat Pump Ready" section).
  • Be your main residence (not a second home or rental property, unless you’re a private tenant with landlord permission).

Who Qualifies for the Boiler Upgrade Scheme (BUS)?

BUS is simpler but less generous for low-income households. You qualify if:

  • You own your property (or have landlord permission if you’re a private tenant).
  • Your property has a valid EPC (no minimum rating required, but your home must be suitable for a heat pump).
  • You’re replacing an existing fossil fuel heating system (e.g., gas boiler, oil boiler, or electric storage heaters).
  • You’re installing an air source or ground source heat pump (or biomass boiler, though this is less common).

Key difference: BUS doesn’t consider income or benefits, but you’ll need to cover the remaining cost after the £7,500 grant. For example, if your ASHP costs £10,000, you’ll pay £2,500 out of pocket.

Who Qualifies for a Free Heat Pump under ECO4? (Detailed Criteria)

ECO4’s eligibility criteria are strict, but they’re designed to prioritise those who need help the most. Here’s a breakdown of the exact requirements, including edge cases and exceptions.

1. Benefits-Based Eligibility

If you receive any of the qualifying benefits listed earlier, you’re likely eligible - but there are nuances:

  • Universal Credit: You must have a household income below £1,980 per month (after tax and housing costs) if you’re single, or £2,960 per month for couples.
  • Pension Credit: Guarantee Credit automatically qualifies you, while Savings Credit has income thresholds (£182.60 per week for singles, £278.70 for couples).
  • Child Benefit: As mentioned, income thresholds apply. Use the GOV.UK Child Benefit calculator to check.

Edge case: If you’re on a "legacy benefit" (e.g., Income Support) that’s being replaced by Universal Credit, you may still qualify. Check with your local Jobcentre.

2. LA Flex Eligibility

LA Flex is where things get complicated. Each council publishes its own Statement of Intent (SOI), outlining its criteria. Here’s what to look for:

  • Income thresholds: Most councils use £31,000 as the upper limit, but some (e.g., Cornwall) set it lower.
  • EPC requirements: Some councils require an EPC of E, F, or G, while others include D.
  • Vulnerability criteria: Households with children under 5, elderly residents, or those with disabilities may qualify even if their income is slightly above the threshold.

How to check: Search for "[Your Council] ECO4 LA Flex" or visit your council’s website. For example:

3. Property Eligibility

Even if you meet the income or benefits criteria, your property must:

  • Have an EPC rating of D, E, F, or G. If your EPC is C or above, you won’t qualify for ECO4 (but you might for BUS).
  • Be suitable for a heat pump. This means:
    • Adequate insulation: Loft insulation (270mm) and cavity wall insulation (if applicable) are usually required. If your home lacks insulation, ECO4 may fund this first.
    • Compatible heating system: Heat pumps work best with low-temperature radiators or underfloor heating. If you have old, small radiators, you may need upgrades.
    • Space for an outdoor unit: ASHPs need an outdoor unit, typically mounted on a wall or ground. GSHPs require a garden or land for ground loops.

Illustrative composite based on typical UK installations: Sarah, a single parent in Leeds, receives Universal Credit and lives in a 1930s semi-detached house with an EPC rating of E. Her home has loft insulation but no cavity wall insulation. Under ECO4, her energy supplier funds:

  • A £9,000 air source heat pump (fully covered).
  • £1,500 for cavity wall insulation (fully covered).
  • £500 for a new hot water cylinder (Sarah contributes £200). Total cost to Sarah: £200 - a fraction of the £11,000 total.

What if I'm Not on Benefits? The LA Flex Route Explained

If you don’t receive benefits but earn under £31,000, LA Flex could be your ticket to a free heat pump. Here’s how it works - and how to navigate the process.

How LA Flex Works

LA Flex allows councils to extend ECO4 eligibility to households that don’t receive benefits but are still considered "vulnerable" or "fuel poor". Each council sets its own rules, but the process typically involves:

  1. Checking your council’s criteria: Visit your council’s website or search for "[Your Council] ECO4 LA Flex".
  2. Providing proof of income: Payslips, P60s, or bank statements.
  3. Getting an EPC assessment: If you don’t have a valid EPC, your council may arrange one.
  4. Applying through an approved installer: Your council will have a list of installers who can process LA Flex applications.

Common LA Flex Criteria

While criteria vary, most councils require:

  • Household income under £31,000 (some set it lower, e.g., £28,000).
  • EPC rating of D, E, F, or G.
  • Vulnerability factors, such as:
    • Residents over 65.
    • Children under 5.
    • Disabilities or long-term health conditions.
    • High energy costs relative to income (e.g., spending over 10% of income on heating).

Example: In Bristol, LA Flex covers households with an income under £31,000 and an EPC of E, F, or G. If you have an EPC of D, you’ll need to demonstrate vulnerability (e.g., a resident with a disability).

How to Apply for LA Flex

  1. Check your council’s SOI: This document outlines the exact criteria. Search for "[Your Council] Statement of Intent ECO4".
  2. Gather documents: Proof of income (payslips, P60), EPC certificate, and evidence of vulnerability (if applicable).
  3. Contact an approved installer: Your council’s website will list installers who can process LA Flex applications. Use our find an MCS installer tool to locate one near you.
  4. Get a survey: The installer will assess your home’s suitability for a heat pump and any necessary upgrades (e.g., insulation).
  5. Submit your application: The installer will handle the paperwork and liaise with your council.

Tip: Some councils offer free EPC assessments for LA Flex applicants. Check your council’s website or contact their energy efficiency team.

The Application Process Step-by-Step

Applying for ECO4 or LA Flex can feel daunting, but breaking it down into steps makes it manageable. Here’s what to expect, from initial checks to installation.

Step 1: Check Your Eligibility

Before you apply, confirm you meet the criteria:

Step 2: Find an MCS-Certified Installer

ECO4 and BUS require installers to be MCS-certified. Here’s how to find one:

  1. Use our find an MCS installer tool.
  2. Get at least 3 quotes to compare costs and recommendations.
  3. Ask installers about their experience with ECO4/LA Flex applications.

Warning: Avoid installers who pressure you into signing quickly or offer "too good to be true" deals. Reputable installers will provide a detailed survey and explain all costs upfront.

Step 3: Get a Home Survey

The installer will visit your home to assess:

  • Insulation levels: Loft, walls, and floors.
  • Heating system: Radiator sizes, pipework, and hot water cylinder.
  • Space for the heat pump: Outdoor unit location for ASHPs or ground loops for GSHPs.
  • EPC rating: If you don’t have a valid EPC, the installer may arrange one.

What to ask during the survey:

  • Will my home need additional upgrades (e.g., insulation, radiators)?
  • How much will I need to contribute if the grant doesn’t cover everything?
  • What’s the expected running cost of the heat pump compared to my current system? Use our running costs comparison for a rough estimate.

Step 4: Apply for the Grant

The application process differs for ECO4 and BUS:

ECO4 Application Process

  1. Installer submits your details to your energy supplier (e.g., British Gas, E.ON).
  2. Supplier reviews your application and may request additional documents (e.g., proof of benefits, EPC certificate).
  3. Supplier approves or rejects your application. If approved, they’ll confirm the funding amount and any contributions you need to make.
  4. Installation is scheduled. This typically takes 4-12 weeks, depending on demand.

BUS Application Process

  1. Installer applies for the voucher on your behalf via the GOV.UK BUS portal.
  2. You receive a voucher (usually within 10 working days).
  3. Installation is completed within 3 months of voucher issue.
  4. Installer redeems the voucher and deducts the £7,500 grant from your bill.

Step 5: Installation and Aftercare

Once approved, installation typically takes 2-5 days. Here’s what to expect:

  • Day 1: Removal of your old heating system (if applicable) and installation of the outdoor unit (for ASHPs) or ground loops (for GSHPs).
  • Day 2-3: Installation of the indoor unit, pipework, and any necessary upgrades (e.g., new radiators, hot water cylinder).
  • Day 4-5: Commissioning and testing of the system. The installer will show you how to use the controls and explain maintenance requirements.

Aftercare tips:

  • Register your heat pump with the manufacturer for warranty purposes.
  • Schedule annual servicing to keep your heat pump running efficiently. Use our MCS installer directory to find a local service provider.
  • Monitor your energy bills to track savings. Our savings calculator can help you estimate long-term costs.

Beyond the Grant: Is Your Home "Heat Pump Ready"?

Even if you qualify for ECO4 or BUS, your home may need upgrades to make a heat pump viable. Here’s what to consider - and how ECO4 can help fund these improvements.

Why "Heat Pump Ready" Matters

Heat pumps operate at lower temperatures than gas boilers, so your home must retain heat efficiently. If your home is poorly insulated or has old radiators, your heat pump may struggle to keep you warm, leading to higher running costs.

Key Upgrades for Heat Pump Efficiency

  1. Insulation:

    • Loft insulation: 270mm is the recommended depth. ECO4 may fund this if your home lacks it.
    • Cavity wall insulation: If your home has unfilled cavities, ECO4 can cover the cost.
    • Solid wall insulation: More expensive, but ECO4 may contribute if your home has solid walls.
    • Floor insulation: Often overlooked, but can reduce heat loss by up to 10%.

  2. Radiators:

    • Heat pumps work best with low-temperature radiators or underfloor heating. If your radiators are small or old, you may need larger ones or additional units.
    • ECO4 may fund radiator upgrades if they’re deemed necessary for the heat pump to work efficiently.

  3. Hot Water Cylinder:

    • Heat pumps require a dedicated hot water cylinder (usually 180-250 litres). If you don’t have one, ECO4 may cover the cost.

  4. Draught-proofing:

    • Simple measures like sealing gaps around doors and windows can improve efficiency. ECO4 may fund draught-proofing as part of a wider package.

How ECO4 Can Fund Upgrades

ECO4 doesn’t just cover heat pumps - it can fund any energy efficiency measure that improves your home’s EPC rating. This means:

  • If your home needs insulation to reach an EPC of D or above, ECO4 may fund this before installing a heat pump.
  • If your radiators are too small, ECO4 may cover the cost of upgrading them.

Example: James, a pensioner in Glasgow, lives in a 1950s bungalow with an EPC rating of F. His home has no cavity wall insulation and old radiators. Under ECO4, his energy supplier funds:

  • £2,000 for cavity wall insulation.
  • £1,500 for new low-temperature radiators.
  • £8,000 for an air source heat pump. Total cost to James: £0 - his home is now "heat pump ready" and his EPC has improved to D.

What If My Home Isn’t Suitable?

If your home can’t be made "heat pump ready" (e.g., it’s a listed building with solid walls), you may need to consider alternatives:

  • Hybrid heat pump: Combines a heat pump with a gas boiler for peak demand. BUS doesn’t cover hybrids, but ECO4 might.
  • Biomass boiler: If you have space for a wood pellet boiler, BUS offers £5,000 grants.
  • Improved insulation: Even if a heat pump isn’t viable, ECO4 can fund insulation to reduce your energy bills.

Use our home suitability check to assess your options.

Finding a Certified Installer for Your ECO4 Heat Pump

Choosing the right installer is critical - a poorly installed heat pump can cost you thousands in repairs and higher energy bills. Here’s how to find a reputable, MCS-certified installer for your ECO4 or BUS application.

Why MCS Certification Matters

The Microgeneration Certification Scheme (MCS) sets standards for heat pump installations. MCS-certified installers must:

  • Use approved products (e.g., heat pumps from manufacturers like Mitsubishi, Daikin, or Vaillant).
  • Follow strict installation guidelines to ensure efficiency and safety.
  • Provide warranties (typically 5-10 years for the heat pump and 2 years for labour).

Warning: Installers without MCS certification may offer cheaper quotes, but you won’t qualify for ECO4 or BUS grants. You’ll also risk poor performance and voided warranties.

How to Find an MCS-Certified Installer

  1. Use our find an MCS installer tool: We’ve vetted installers across the UK to ensure they meet MCS standards.
  2. Check the MCS database: Visit mcscertified.com/find-an-installer and filter by "Heat Pumps".
  3. Ask for recommendations: Friends, family, or local Facebook groups may have suggestions.
  4. Get multiple quotes: Aim for at least 3 quotes to compare costs and recommendations.

Questions to Ask Your Installer

Before committing, ask these questions to ensure you’re getting a quality installation:

  1. Are you MCS-certified? (Ask for their MCS number and verify it on the MCS website.)
  2. How many heat pumps have you installed under ECO4/BUS? (Experience with grants is crucial.)
  3. What upgrades will my home need? (Insulation, radiators, hot water cylinder, etc.)
  4. What’s the total cost, and how much will I need to contribute? (Get this in writing.)
  5. What’s the expected running cost of the heat pump? (Compare this to your current system using our running costs comparison.)
  6. What warranty do you offer? (Look for at least 5 years on the heat pump and 2 years on labour.)
  7. Can you provide references or case studies? (Ask to speak to previous customers.)

Red Flags to Watch For

  • Pressure to sign quickly: Reputable installers will give you time to consider your options.
  • Vague quotes: Avoid installers who can’t provide a detailed breakdown of costs.
  • No MCS certification: If they’re not MCS-certified, you won’t qualify for grants.
  • Promises of "free" heat pumps without checks: ECO4 eligibility requires proof of benefits, income, and EPC rating.

FAQ

1. Can I get a free heat pump if I’m a private tenant?

Yes, but you’ll need your landlord’s permission. Under ECO4, private tenants can qualify if:

  • You receive qualifying benefits or meet LA Flex criteria.
  • Your landlord agrees to the installation (they can’t unreasonably refuse).
  • The property has an EPC rating of D, E, F, or G.

Tip: If your landlord is hesitant, remind them that ECO4-funded improvements can increase the property’s value and EPC rating. Use our heat pump vs gas boiler guide to highlight the long-term savings.

2. What’s the difference between an air source and ground source heat pump under ECO4?

ECO4 covers both air source (ASHP) and ground source (GSHP) heat pumps, but there are key differences:

FactorAir Source Heat Pump (ASHP)Ground Source Heat Pump (GSHP)
Cost£8,000-£12,000 (fully covered by ECO4 if eligible)£15,000-£30,000 (ECO4 may cover part of the cost)
InstallationEasier (outdoor unit mounted on wall or ground)More complex (requires ground loops or boreholes)
Efficiency250-400% (3-4 kWh heat per 1 kWh electricity)300-500% (4-5 kWh heat per 1 kWh electricity)
Space requirementsSmall outdoor unitLarge garden or land for ground loops
ECO4 fundingMore likely to be fully fundedMay require top-up payments

Key takeaway: ASHPs are cheaper and easier to install, making them the default choice for ECO4. GSHPs are more efficient but often require additional funding.

3. How long does the ECO4 application process take?

The timeline varies, but here’s a rough breakdown:

  1. Eligibility check: 1-2 weeks (longer for LA Flex, as councils may need to verify documents).
  2. Home survey: 2-4 weeks (depending on installer availability).
  3. Application review: 4-8 weeks (energy suppliers may request additional documents).
  4. Installation: 4-12 weeks (depending on demand and weather conditions).

Total time: 3-6 months from initial enquiry to installation. Start early - ECO4 ends on 31 March 2026.

4. What happens if my ECO4 application is rejected?

If your application is rejected, don’t panic. Common reasons for rejection include:

  • Insufficient evidence of benefits or income: Double-check your documents and resubmit.
  • EPC rating too high: If your EPC is C or above, you won’t qualify for ECO4 (but you might for BUS).
  • Home not suitable for a heat pump: The installer may recommend upgrades (e.g., insulation) before reapplying.

Next steps:

  1. Ask for feedback: Your installer or energy supplier should explain why your application was rejected.
  2. Address the issues: If your home needs upgrades, ECO4 may fund these first.
  3. Consider BUS: If you’re not eligible for ECO4, the Boiler Upgrade Scheme offers £7,500 grants regardless of income.

5. Can I combine ECO4 with other grants?

Yes, but with limitations. Here’s how ECO4 interacts with other schemes:

  • Boiler Upgrade Scheme (BUS): You cannot combine ECO4 and BUS for the same heat pump. Choose the scheme that offers the best deal for your situation.
  • Local authority grants: Some councils offer additional funding for energy efficiency. Check your council’s website for details.
  • VAT relief: Heat pumps are zero-rated for VAT (0% instead of 20%), saving you hundreds of pounds. This applies to both ECO4 and BUS installations.

Example: Emma, a homeowner in Birmingham, qualifies for ECO4 but also wants to install solar panels. She uses ECO4 for her heat pump and applies for a separate local authority grant for solar PV.

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