The UK home energy efficiency scene is witnessing a serious transformation as the government brings in significant reforms to the Energy Company Obligation (ECO4) scheme and the Great British Insulation Scheme (GBIS). These reforms are the most comprehensive overhauls of energy efficiency policy since ECO4 was launched in 2022 and will affect millions of UK homes and reshape our strategy for home energy upgrading.
As energy costs continue to put a strain on family budgets and climate emergency demands critical attention, getting to know these changes has never been so important to residents looking to lower their bill and have a positive impact on environmental goals. The reforms affect everything from funding terms to eligibility requirements, creating new opportunities for energy-saving upgrades as well as addressing delivery problems that have continued to surface since the programmes began.
What is the ECO4 Scheme?
The Energy Company Obligation (ECO4) is the fourth phase of the UK government’s major energy efficiency scheme, acting as a keystone policy in the fight against fuel poverty and climate change. Introduced in April 2022 and originally meant to run until March 2026, ECO4 mandates large energy suppliers to make investments in enhancing home energy for low-income and disadvantaged households.
Unlike the previous ECO schemes with their emphasis on single interventions, ECO4 takes an evolved whole-house strategy. Under this integrated approach, homes receive several support upgrades rather than just one upgrade that may not make much of a difference, resulting in greater energy savings and long-term gains. The scheme is specially targeted homes with EPC ratings of D or lower, impacting the UK’s poorest-performing properties where action will make the most difference.
On a budget of £4 billion over the scheme’s lifetime, ECO4 is one of the largest public investments on energy efficiency for British homes ever undertaken. For eligible families, ECO4 can pay from £7,000 to £20,000+, covering installations such as insulation, replacement of heating systems, renewable technologies, and smart heating controls. While the scheme targets the homeowners receiving benefits, you can still qualify under the ECO4 Flex provision which allows local authorities to identify other low-income and vulnerable families that are not covered under standard benefit thresholds but are in need because of their financial situation or are vulnerable because of their medical, health and age situation.
Do you qualify for funding under ECO4? Check your eligibility by filling in our easy 1-minute form to learn what energy-saving upgrades you could be qualified for free. Our team can help you secure funding for the upgrades that are most suitable for your needs! Contact us to learn more.
Funding Available Under ECO4
ECO4’s monetary size is unrivalled in the UK energy efficiency landscape, with £4 billion contributed by the government throughout the four-year plan duration. The amount invested reaches about £1 billion annually, ranking ECO4 as one of the largest home energy programs Britain has ever seen. The funding results from a very sophisticated system in which energy suppliers must provide £224.3 million worth of yearly bill savings by the time March 2026 comes around.
Lower EPC rated homes typically become eligible for higher amounts of funding, recognising that more intense interventions are required to achieve real efficiency gains. The ECO4 approach also prioritizes measures with highest possible yearly bill savings, optimizing the use of available funds to realize maximum benefit to distressed households.
Individual Funding Tiers:
- Typical Measures: Homeowners can receive £7,000 to £15,000 for complete packages of insulation for the loft, cavity walls, and solid walls where applicable.
- Heating Improvements: Homes which are required to install new heating systems can receive £15,000 to £25,000 for the first-time installation of condensing boilers, air source heat pumps, biomass boilers, or full central heating systems.
- Deep Retrofits: The most inefficient homes can access over £25,000 in funding for full house renovations including multiple insulation measures and renewable heating equipment.
Home Energy Guide always works to make sure that homeowners are able to get the most amount of funding they are entitled to. We work with the best energy grant supplier to ensure that you get the most reliable systems and quality insulations that last you decades to come.
The scheme’s funding model involves several bonuses to stimulate particular delivery forms. Installations within rural properties have higher funding acknowledgement, and installations within difficult-to-treat properties have additional support available to overcome technical challenges.
An important aspect of ECO4 funding to consider is that those supported via ECO4 cannot be supported by other government programs simultaneously. This maintains efficient use of funds and prevents double-funding, though families are still able to obtain complementary funding from local authorities or charitable organizations for preparation work or additional measures not supported by ECO4.
GBIS Explained?
GBIS is a strategic boost to ECO4, launched in March 2023 with a dedicated £1 fund to stimulate the pace of insulation installation in British homes. Whereas ECO4 has an emphasis on integrated whole-house measures for the most disadvantaged households, GBIS pursues a streamlined approach, targeting single, high-impact interventions of insulation with more inclusive criteria for homeowners.
GBIS evolved from a recognition that there are significant numbers of households in an efficiency gap, as in they fail ECO4’s strict low-income eligibility requirements but continue to have high bills and inefficient homes. The scheme addresses this by making the eligibility broader to include households in Council Tax bands A-D in England, and A-E in Scotland and Wales, regardless of benefit status, provided their homes are rated D or below on their EPC.
The scheme’s design approach relies on the delivery of fast gains through cost-effective insulation measures to be fitted rapidly and providing immediate benefit. In contrast with the high-tech whole-house approach of ECO4, GBIS focuses primarily on three principal measures: loft insulation, cavity wall insulation, and solid wall insulation. This simplified focus enables faster deployment while reducing administrative complexity for installers and suppliers.
Key GBIS Features:
- Rationalized Eligibility: Broader access beyond traditional benefit-based qualifications
- Fast Upgrades: Single-measure can be carried out faster
- Value for Money Effect: Targeted measures with highest cost-benefit considerations
- Wider Geographic Reach: England, Scotland, and Wales
The scheme has demonstrated significant progress since its launch, with deliveries accelerating throughout 2024. GBIS had completed 36,900 houses with 46,200 measures through October 2024, and monthly installation levels are improving by 65% over earlier phases. This pace reflects the scheme’s rising popularity and much needed upgrades that helps homeowners cut their bills significantly while better warming their homes.
Is GBIS right for your home? Fill in our form to determine whether specialist insulation improvement can reduce your bills this year!
How the ECO4 Scheme is Different from Previous Versions
ECO4 is the most sophisticated version in the Energy Company Obligation scheme since it began in 2013, with radical changes that are a result of lessons from previous iterations and response to emerging energy challenges. The move from ECO3 to ECO4 is a turning point from incremental gains toward complete home overhauls.
The Whole-House Strategy
The most revolutionary change is that ECO4 embraces whole-house upgrades, abandoning the previous single-measure emphasis that often resulted in indifferent outcomes. Under ECO3, suppliers were able to fit individual measures like cavity wall insulation without consideration for how this would interact with other components of the home’s energy system. ECO4 demands that installations are to make certain EPC improvements: band D and E properties must be no lower than band C, and band F and G dwellings must be no lower than band D.
This integrated approach ensures that installations work in conjunction with each other, bypassing common mistakes such as installing high-efficiency space heaters in poorly insulated homes or putting on insulation without ventilation. The result is more profound, with millions of homeowners able to dramatically lower their bills while having much more comfortable and warmer homes.
Increased Targeting and Scale
ECO4 greatly increased the volume and precision of targeting compared to its predecessors. While ECO3 operated on a reduced budget and broader eligibility, the £4 billion pool of funding under ECO4 represents a 33% increase in year-over-year investment. More notably, however, the scheme has enhanced its targeting to aim at the 3.5 million least efficient UK homes, thus ensuring that resources reach the homes where intervention will have greatest impact.
Introduction of minimum sub-obligations for some types of property and measures has also made sure that a well-balanced delivery across different housing problems is achieved. ECO4 mandates suppliers to deliver minimum amounts of material for solid wall insulation and properties with expensive, dirty fuels (EFG properties), to prevent cherry-picking easy-to-fit properties and locking out harder-to-treat properties.
Improved Consumer Protection
Learning from earlier schemes’ issues of quality, ECO4 built in greater consumer protection right at the outset. The scheme must abide by PAS 2035/2030 retrofit standards, such that the work follows best-practice methods that consider whole-house impacts. Increased audit standards and better data exchange between interested parties provide additional safeguards against poor work.
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Innovation and Future-Proofing
ECO4 involves testing out innovation mechanisms for new technologies through targeted innovation interventions and larger uplifts for highest-performing installations. This forward approach enables the scheme to adapt with the latest technology while generating evidence for future policy-making. The Pay-For-Performance mechanism suggested, though not implemented in the current scheme, is an insight into ECO4’s vision for transitioning from the installation targets only to performance-based outcomes.
Find out how ECO4 Unplugged is making homes warmer and more efficient
Why are the Government Proposing Mid-Scheme Changes?
The government’s plan to introduce mid-scheme changes to GBIS and ECO4 is due to genuine delivery problems and emerging opportunities that have been experienced since the launching of both schemes. This case is especially true with GBIS, which has proven to be more costly than anticipated.
Addressing GBIS Cost Barriers
The primary driver of change is the above-estimated delivery expense of GBIS, which has caused problems with the scheme being carried out according to its original ideals, therefore threatening the chance of it accomplishing its goals of upgrading the insulation for thousands of homes across the UK. Initial estimates had not accounted fully for the difficulty in locating and enrolling eligible dwellings, along with the cost of fitting individual insulation. These factors have led to below-anticipated take-up, particularly during the early stages of the scheme.
The cost issues are partly a result of GBIS’s design as a stand-alone insulation scheme, which can be considered weaker than ECO4’s holistic approach. The installation of insulation measures separately involves one-off assessments, contractor mobilisation, and administrative processes, creating higher per-job costs than initially modelled. This reality has made it necessary to carry out policy adjustments to maintain the scheme’s viability without compromising its initial aims.
Industry Alignment and Modernisation
Apart from the cost factors, the government has also perceived opportunities to bring together both programs through the evolving industry practices and technological advancements. The energy efficiency sector has seen significant developments since the launch of ECO4 and GBIS, including new installation practices, new technologies, and improved knowledge of what constitutes a good retrofit practice.
These industry developments resulted in imbalances between scheme rules and current best practice, which can limit installation performance or create excessive barriers to delivery. The mid-scheme reforms present an opportunity to update programme parameters to reflect current knowledge while maintaining central policy aims.
Performance-Based Approaches
The consultation also reflects the government’s vision to lead pioneering Pay-For-Performance (PFP) methods that can transform the way energy efficiency schemes function. Conventional schemes emphasize installation targets over genuine performance gains, neglecting the possibility of using incentives to encourage higher-quality installations which achieve better real-world outcomes.
PFP techniques use Smart Meter Enabled Thermal Efficiency Ratings (SMETERs) to calculate accurate real changes in a home’s thermal performance, offering a pay for better performance by suppliers and installers. This could change the nature of the energy efficiency industry, drive quality and generating useful evidence to inform future policy.
Optimising Resource Allocation
Mid-scheme improvements also addresses resource inefficiencies in the distribution which emerged as the two schemes evolved. It is now agreed that adding ECO4 delivery alongside GBIS objectives is a flexibility that can help increase overall programme without compromising assistance to both schemes’ covered households. It acknowledges that artificial scheme boundaries have the potential to create inefficiencies that ultimately lower overall numbers of assisted households.
Want to understand how these changes could benefit your household? Check your eligibility for both ECO4 and GBIS upgrades through our simple 1-minute eligibility tool.
What the Consultation Covers
The government’s mid-scheme consultation addressed a broad spectrum of policy alterations for the improvement of GBIS and ECO4 delivery as well as testing new approaches that would shape future energy efficiency schemes. The consultation was open from 14 November 2024 to 12 December 2024 and received 122 responses across a broad range of participants from energy suppliers, local councils, installers to trade associations, and consumer groups.
Mid-Scheme Policy Amendments
The consultation’s initial part covered improvements in practical delivery, breaking down barriers that have affected the scheme’s performance since its launch. Major recommendations involved permitting households to be provided with more than one measure of insulation under GBIS, going beyond the initial one-measure stipulation. The move acknowledges that numerous homes require both loft and cavity wall insulation to see substantial energy savings.
Intelligent thermostats subsequently emerged as another important proposition, with the argument to have them offered for fitting as part of insulation packages in low-income GBIS homes. This addition acknowledges the importance and improvement of heating control technology and provides additional benefit to vulnerable households that would benefit most from better heating control.
Cross-Scheme Flexibility Mechanisms
By far the most significant recommendation was authorizing ECO4 delivery to count towards GBIS targets, balancing the cost and efficiency factors that have constrained GBIS installation. This method of flexibility would enable 75% of GBIS commitments to be met through ECO4-compliant installations, providing suppliers with greater delivery flexibility while still serving qualifying households that are GBIS-specific.
The proposal has sophisticated conversion factors to ensure coequal fairness: ECO4 delivery to GBIS receives a 1.251 factor, and GBIS delivery above 25% of targets receives a 1.716 factor. These changes ensure that suppliers who do not get affected negatively regardless of the scheme rules under which they work for specific installations.
Technical and Administrative Updates
New updates that included many of the technical issues that have emerged under scheme operation; which include enhancements to definitions for properties assisted in rural areas to ensuring ECO4 and GBIS work from modern geographic information, and updates to Shared Ground Loop align these installations with other District Heating Connection methodologies. The inclusion of TrustMark Licence Plus (TMLP) as a new benchmark for loft insulation installations aims to increase delivery appeal while maintaining quality.
Pay-For-Performance Innovation – Withdrawn
The consultation initially recommended installing a voluntary Pay-For-Performance scheme based on SMETER technology to track and compensate for actual thermal performance improvements compared to just the completion of installations. This strong recommendation would have been a transformative drive, strengthening the outcomes-based energy efficiency policy, with the possible result of encouraging superior installation quality and providing valuable performance feedback.
But the government decided not to go ahead with PFP delivery in ECO4 and GBIS due to the restricted time frame left before schemes close in March 2026. Although disappointing to those backing innovation, it does make sure that the focus remains on proven delivery gains and maintaining PFP ideas for subsequent programmes.
Stakeholder Response and Implementation
The consultation response was considered broadly supportive by the government, with stakeholders specifically embracing measures of flexibility that had the potential to enhance delivery efficiency. The quick turnaround implementation time – with changes being effective from the consultation publication date of 14 November 2024 – illustrates the importance to deal with identified delivery challenges.
The positive stakeholder response arises through industry valuing the way the proposed changes address real operational issues without compromising on both schemes’ core objectives. Implementation of these changes places ECO4 and GBIS in a better position to provide more effectively throughout their remaining operational lifespan.
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Minor ECO4 and GBIS Policy Changes
Besides the large-scale structural changes, the mid-scheme consultation also put into action several targeted policy changes intended to address specific delivery problems and align scheme operation with the evolving best practice across the industry. While individually the modifications are insignificant, combined they enhance programme performance and remove unnecessary delivery restrictions.
Geographic and Technical Alignments
The consultation also updated geographical definitions so both schemes could operate with current datasets, namely about classifications of rural areas that affect delivery needs and funding calculation. ECO4 and GBIS relied on outdated geographic data previously, which has possibly caused inconsistencies when classifying and funding installations. The alignment ensures administration of the schemes based on current demographic and geographic facts.
Treatment of Common Ground Loops (SGLs) received special attention, with proposals for grouping such installations with other District Heating Connection methods in ECO4. This technological adjustment removes artificial distinctions between types of neighbourhood heating solutions, offering consistent treatment regardless of the specific technology employed.
Installation Standards Evolution
Introduction of TrustMark Licence Plus (TMLP) as an alternative installation standard for GBIS loft insulation is a significant achievement in quality assurance measures. Traditional installation standards, while comprehensive, are sometimes too detailed to accommodate straightforward insulation schemes, involving unnecessary costs and delays. TMLP provides a streamlined yet strict alternative dedicated to GBIS specifications.
This is included in broader industry evolution towards proportionate levels of quality standards that match installation complexity and associated levels of supervision. Low-complexity interventions like loft insulation may not require the full PAS 2035/2030 retrofit survey process, while still maintaining adequate consumer protection and yet high installation standards.
Better Measure Combinations
GBIS expansion of acceptable measure combinations addresses practical limitations that have hampered the efficiency of schemes. GBIS homes typically qualified for a single measure under former regulations when they clearly needed multiple measures to be fitted for significant energy benefits. With new regulations, the inclusion of cavity wall and loft insulation fitting in one scheme is allowed, an acknowledgement that most homes require more than one measure to be fitted for optimal thermal performance.
This revision works in favor of most families living in houses with multiple insulation shortages so that they benefit from comprehensive upgrades rather than patchwork fixes that might provide little relief. The changes continue to support GBIS’s focus on cost savings in delivery but expands its hands-on applicability for beneficiary families.
Smart Technology Integration
The inclusion of smart thermostats within GBIS represents recognition of technological advances in heating control and their potential to deliver additional energy savings beyond basic insulation measures. Previously, GBIS allowed heating controls only in limited circumstances, potentially missing opportunities to maximise the benefit of insulation installations through improved heating management.
Smart thermostats offer direct benefit for vulnerable families who may struggle with complicated heating controls or lack the technical expertise to maximize heating benefits even from modern efficient systems. Through the integration of these technologies into GBIS packages, the scheme can result in greater savings while providing advanced tools that give homeowners more control on their energy consumption without compromising on warmth and comfort.
Administrative Optimization
Various administrative modifications address everyday issues that have come up during the running of the schemes, with improvements to data sharing and modifications to reporting requirements. While these changes might appear minor, they can impact delivery efficiency by reducing bureaucratic barriers and increasing information flow among scheme stakeholders.
The amendments also make timing issues around project notification and scheme compliance clearer so that suppliers understand how installations are to be defined and declared. This clarity removes administrative uncertainty while ensuring a stronger scheme monitoring and tougher accountability.
These policy reforms reflect the Government’s determination to continue improvement in the delivery of energy efficiency programs, acting on practical concerns with program integrity and consumer protection. These specific reforms reflect intensive industry consultation and practical delivery experience.
Discover how these policy enhancements can improve your home’s energy efficiency. Complete our simple assessment to view your choices under new scheme rules. Our consultants can help you determine the best course of action and the heating system most suitable for your needs.
Home Energy Guide: Expert Strategies for a Greener, More Efficient Home
Being a reputable energy advisor with expert knowledge of UK government energy efficiency schemes, Home Energy Guide is your trusted guide through the complex world of ECO4 and GBIS upgrades. Our proficiency covers the whole range of available support, from first check of eligibility to connecting you with certified installers who offer quality, fully-funded energy upgrades.
Assessing your eligibility for ECO4 and GBIS can be complex, particularly in the aftermath of recent mid-scheme changes that raised prospects and brought additional ways of accessing aid. Home Energy Guide provides thorough analyses of your eligibility that do not just consider your current circumstances, but also other routes such as the ECO4 Flex and GBIS Flex alternatives potentially available through local authority referrals. We understand the complexity of both initiatives and are able to ascertain the most appropriate path in your case, be it complete ECO4 whole-house improvements or targeted GBIS insulation measures.
The recent updates of ECO4 and GBIS have created opportunities and challenges that are too complex for homeowners to deal with themselves. Our knowledge will result in you being able to clearly know what support is available, what you can get fitted, and how the procedure will proceed from initial assessment to installation.
Home Energy Guide has relationships with a network of approved energy suppliers and Gas Safe registered installers who fit ECO4 and GBIS measures to the highest standards possible. Our screening process is such that all our partners demonstrate technical competence, appropriate certifications, and customer service integrity that confirms our values. We make sure you get the best quality material and premium systems like Worcester Bosch, covering you with extended warranties, with a new A-rated combi boiler now covered by up to 12 years for your peace of mind!
We keep ahead of all scheme changes, including the technical changes, improved measure combinations, and cross-scheme flexibility provisions that may benefit your particular situation. This knowledge ensures you get the maximum available support without facing numerous pitfalls that cause delays or make applications more complicated.
Fill in our simple 1-minute eligibility form and upgrade your home completely for free. Our friendly desk team is always ready to answer any questions you have so feel free to call us anytime!
