April 7, 2026 RHI Scheme
For many biomass system owners, the Renewable Heat Incentive was never just a subsidy. It ensured payments were predictable, fuel costs were manageable, and the investment made sense not only environmentally but commercially.
That support was always designed to end. From 2031 onwards, Non-Domestic RHI payments will begin to roll off on a site-by-site basis, depending on when each installation was accredited. For some organisations, that moment is still several years away. For others, it is now close enough to require serious attention.
There is no direct replacement scheme offering the same level of support and as a result, the conversation is changing. The focus is no longer on tariff income, but on how the system performs in its own right and whether it continues to meet the practical needs of the site.
There is no single answer that applies everywhere. What happens next depends on the system you have, how it has been used, and what your operation demands from it now.
Start with the reality on site
Before making any decisions, it is worth taking a step back and looking carefully at the system already in place.
Many biomass boilers installed under the RHI were built to last. Where they have been properly maintained, it is not unusual for them to continue operating reliably for decades. In these cases, the end of the subsidy does not suddenly make the system obsolete, it simply changes the financial context.
Other installations may be showing their age – components wear out and maintenance becomes more frequent. In some cases, the building itself has changed, production has increased, operating hours are different, or heat demand no longer follows the same pattern.
A system that still aligns with the site’s needs can continue to provide dependable heat long after RHI payments stop. One that no longer fits may require a different approach. The key is understanding which situation you are in.
Operating cost becomes the deciding factor
Without RHI income, the economics of renewable heat return to fundamentals. Fuel cost, efficiency, and reliability become the primary drivers, fortunately, these were always the strengths of wood heating.
For many businesses, wood fuel offers something increasingly valuable: predictability. Supply chains are well established. Prices tend to be more stable than fossil fuels and fuel can often be sourced locally, reducing exposure to global energy volatility.
Electric alternatives, including heat pumps, can perform very well in the right conditions, but performance depends heavily on system design, building characteristics, and electrical infrastructure. Sites that require higher temperature heat, or operate continuously, may find the transition more complex than expected.
Electricity price exposure also introduces a different kind of risk. What appears cost-effective on paper may look different over the course of a decade. None of this makes one technology inherently better than another, it simply reinforces the importance of matching the solution to the job.
Replacement is not always the answer
When the subsidy ends, replacement is often the first option people consider. In practice, it is rarely the only one.
Many biomass systems will continue to operate perfectly well, the equipment does not stop working simply because the tariff ends. If the boiler remains reliable, efficient, and appropriate for the site, continued operation is often the most straightforward path forward.
In other cases, a gradual transition makes more sense. Biomass can continue to provide core heat while other technologies are introduced alongside it. This approach spreads cost, reduces disruption, and allows the system to evolve over time.
Infrastructure shapes what is possible
Heating systems do not exist in isolation. They are part of a wider network that includes pipework, emitters, control systems, and, increasingly, electrical supply.
Many biomass installations were designed to deliver higher temperature heat. This is particularly common in manufacturing, agriculture, and older commercial buildings. Alternative technologies may require lower temperatures to operate efficiently, which can mean changes elsewhere in the system.
Electrical capacity is another practical constraint. Increasing grid connection capacity can be time-consuming and expensive, especially in rural or industrial locations. They are often the factors that ultimately determine what is feasible.
There is value in taking a measured approach
With several years remaining before most RHI payments end, there is time to plan properly.
Rushed decisions rarely produce the best outcome. Replacing a system prematurely can introduce unnecessary cost and disruption, particularly when the existing installation still has many years of useful life ahead of it.
A more measured approach allows decisions to be made on the basis of performance, condition, and long-term suitability. It also makes it easier to align any changes with planned maintenance cycles or wider site improvements.
In many cases, the right answer becomes clearer with time.
Looking beyond subsidy
The end of the RHI marks a shift, biomass was never valuable solely because of the subsidy. It was valuable because it provided reliable, controllable, and cost-effective heat – that remains true.
For some sites, the existing system will continue to serve them well for many years. For others, the coming decade will bring gradual change. Both situations are normal.
What matters now is making decisions based on how the system performs in practice, and how well it supports the long-term needs of the organisation.
The most successful sites will be those that plan carefully, understand their options, and act at the right time, not simply when the subsidy ends.
If you’re looking for further guidance, our Guide to Green Business Energy sets out how businesses can approach decarbonising heat and power in a practical, structured way, with a clear view of the choices involved.
To speak to a member of the Innasol team, call 01621 892613 or visit www.innasol.com/contact-us/ to arrange a no-obligation discussion.
