How much does a boiler service cost?

An annual boiler service is the most crucial task for maintaining a safe, efficient, and reliable central heating system

Consistent maintenance helps protect your home, extend your boiler's life, and can lead to significant savings on energy bills and prevent expensive future breakdowns. We know boilers can be complex and a source of stress, so this guide is here to make the whole process of annual maintenance clear and easy to understand.

In this guide, we’ll cover:

Factors that affect boiler service costs
Service costs for different boiler types
How often should I have my boiler serviced?
What can I expect from a boiler service?

What can affect servicing costs?

In 2026, the average price for an annual boiler service was estimated to be between £109-120.

Location

There are several factors that can affect the cost of a boiler service. Location, for example, can influence what you pay, as prices vary across the UK depending on local demand and labour costs. As a guide, Which? says a one-off service for a gas boiler typically costs £70 to £110, with an average of around £79.

According to our expert installers, this range is a sensible estimate for a straightforward service. However, the total yearly cost can easily exceed £250, depending on the type of cover plan you choose and what it includes, such as call outs.

Choice of heating engineer

The heating engineer you choose plays a big part in the cost of a boiler service, and the quality of the service you receive. With Glow-worm’s find an installer tool, you are booked in with an independent, Gas Safe registered heating engineer from our installer network, all trained in best practice and in working safely in your home. Prices can still vary depending on your location and the type of service needed, but using a trusted local contractor is often a good way to keep costs down without compromising on a safe, thorough boiler service.

Find a local installer to book your boiler service today.

Boiler cover plans

A service plan gives you more than just an annual service. It can also give you extra support if something goes wrong. Depending on the level of cover you choose, it may include the annual service plus extra support with call outs if your heating stops working, labour costs for repairs, and, in some cases, covers the cost of replacement parts/components. Many plans can also offer faster access to an engineer and a clearer monthly cost, which can make budgeting easier.

The right option comes down to how much reassurance you want, the age of your boiler, and whether you would rather pay for issues as they come up or have a plan in place if you need it.

Boiler type

The type of boiler you have can affect the cost of a service, mainly because some systems take longer to check. Our expert installers often find that combi boilers are more straightforward to service, as it heats water on demand and does not use a hot water cylinder.

A system boiler or regular (heat only) boiler usually works alongside a hot water cylinder and can include extra controls and pipework. This can mean more checks during the visit, especially where the boiler is part of a larger heating system rather than a single compact unit.

In most cases, any price difference comes down to the time needed on site and what needs checking for your specific boiler and system layout.

The age of your boiler

The age of your boiler can affect the price of a service, as older boilers often need more time and attention during the visit. Our installers regularly find that newer boilers are typically quicker to service, as components are easier to access and the system is more likely to be running as expected.

With older boilers, the engineer may need to carry out additional checks, and it can take longer to complete the service, especially if parts are worn, access is awkward, or the boiler has not been serviced regularly. In some cases, older models can also be harder to work on if certain parts are no longer widely available.

Service costs for different boiler types

Your location in the UK and your choice of heating engineer are the biggest deciding factors for the cost of a boiler service. That said, the type of gas boiler you have can also play a part in determining the price. Here, we’ve outlined the typical service costs for different boiler types.

Combi boiler service costs

Combi boilers are compact, cost-effective and energy efficient and are ideal for homes where space is precious and a low hot water demand.

System boiler service costs

System boilers are common for homes that have more than one bathroom due to it being able to provide a constant hot water source with the help of a hot water cylinder.

Regular boiler service costs

Regular boilers are common in homes that are in low water pressure areas, where you will have a hot water cylinder and water storage tank to provide hot water to multiple bathrooms.

The price of servicing the different boiler types is all very similar, with the price estimated to stay between £70-£120, despite the different sizes of the systems.

How often should I have my boiler serviced?

Boiler servicing should be an annual task carried out by homeowners. Having your boiler checked regularly by a specialist ensures:

✓ You maintain your guarantee after the first year

✓ A longer life expectancy for your boiler

✓ You can avoid major repairs if the problem is recognised early

✓ Your boiler is safe to use and prevent issues, like carbon monoxide leaks (CO)

Visit our annual boiler servicing page for more information about why it’s important to get yearly boiler check-ups or find an installer near you to book yours.

You can also book a boiler service through myGlow-worm Web. For info on our online service portal, click here.

Boiler service vs boiler repair

It’s important to note that a boiler service is different from a boiler repair – a service should be carried out once a year to check for any issues, whereas a repair will only need to be carried out in the event that you experience problems with your boiler.

Servicing your boiler with Glow-worm

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