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When summer's in full swing, it's easy to put an annual boiler service on the back burner. But when the colder months creep in and your boiler fires up reliably each morning, you'll be pleased you prioritised the cost of a boiler service.

The average cost of a boiler service is around £100, arguably a small price to pay for the reassurance that your boiler is running safely and efficiently. It can also help to spot problems early on.

In this guide, we explain typical boiler service costs in the UK, what affects the price, how boiler cover compares with a one-off service, and when it’s worth getting professional help.

How much does a boiler service cost in the UK?

In the UK, the average cost of a boiler service is around £100 for a gas boiler, £92.50 for an oil boiler service, and around £90 for servicing an electric combi boiler.

These costs assume you’re paying for a one-off annual boiler service. Some homeowners choose this because it keeps costs simple and predictable.

Others prefer to purchase boiler cover, a type of insurance that spreads the cost over the year and may include breakdown support too.

Get a quote from a local boiler engineer near you

Comparing a few quotes is the easiest way to understand the typical boiler service cost in your area and find a reliable service provider.

A checked local engineer can explain what’s included, confirm whether they’re qualified for your type of boiler, and let you know if there are any signs of wear or faults that need attention.

Enter your postcode to compare local boiler engineers near you.

Boiler service costs at a glance

• Average gas boiler service cost: £100

• Average oil boiler service cost: £92.50

• Average electric combi boiler service cost: £90

• Commercial boiler minimum call-out fee: around £95

• Monthly boiler cover: £8–£13 per month

• Boiler and central heating cover: £180–£300 per year

• Average boiler repair cost: £120–£750

• Typical emergency boiler repair cost: £225–£675

Boiler service costs by type

Gas boiler service cost

A one-off gas boiler service typically costs £80–£120, with an average cost of £100.

During a gas boiler service, a Gas Safe engineer will usually inspect the boiler and controls, check for leaks, confirm the pressure is correct, and test the flue to make sure it’s operating safely.

For many households, this is the most common type of boiler service.

Oil boiler service cost

An oil boiler service usually costs £75–£110, with an average cost of £92.50.

Regular servicing helps reduce the build-up of dust, soot and debris, which can affect both performance and fuel efficiency.

If you have an oil boiler, it’s generally best to have it serviced every 12 months by an OFTEC qualified engineer.

Electric combi boiler service cost

The average price of an electric combi boiler service is around £90, although the work can cost anywhere between £70–£110.

Combi boilers are the most popular type of boiler, heating both your water and central heating.

Electric combi boilers are often less prone to breakdowns than gas and oil boilers, which can make them simpler and sometimes cheaper to maintain over time.

Commercial boiler service cost

For a commercial boiler of 40 kW or under, you’re usually looking at a minimum call-out fee of around £95. Alternatively, you can choose to pay extra as part of your insurance plan to have call-out fees included as part of your cover.

Commercial servicing needs can vary more widely depending on the building and system, so this is one of those areas where it’s especially worth getting a tailored quote.

What does boiler cover cost?

Some homeowners prefer boiler cover instead of paying for a one-off annual service. On average, boiler cover costs fall between £8–£13 per month depending on the provider. Meanwhile, boiler and central heating cover costs are around £180–£300 per year.

Boiler cover works out slightly more expensive than paying for a one-off service each year. However, it may also cover breakdowns and repairs, which can make it feel like better value if you want predictable monthly costs.

If you already have home insurance, it’s worth asking your provider whether boiler cover can be added to your policy for less than the cost of taking out a separate plan.

Budget reality check

For many households, the service itself is not the biggest cost, it’s what happens if the engineer finds a problem.

A routine annual service is usually manageable, especially compared with the cost of a repair or emergency call-out.

But, if your boiler is older, has missed previous services, or has started showing signs of trouble, the total bill can rise quickly once parts and labour are involved.

That’s why regular servicing tends to work out better value in the long run. It helps you spread costs more predictably, rather than dealing with a bigger repair at the worst possible time.

What affects the cost of a boiler service?

Several factors can influence how much you’ll pay for a boiler service, including:

• Type of boiler: gas, oil, electric combi and commercial boilers all have different servicing requirements

• Boiler age and condition: older boilers or those that haven’t been serviced regularly may need more time and attention

• Engineer qualification: gas boilers should be serviced by a Gas Safe registered engineer, while oil boilers need an OFTEC qualified engineer

• One-off service vs boiler cover: a one-off annual service is usually cheaper upfront, while cover spreads costs over time and may include repairs

• Location in the UK: labour rates and call-out charges can vary depending on where you live

• Access and installation setup: boilers in awkward spaces or systems with more complex controls can sometimes take longer to inspect properly

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What’s included in a boiler service?

What’s included can vary slightly depending on your boiler type, but most services cover a similar core set of checks.

A typical boiler service usually includes:

• A visual inspection of the boiler and controls

• Checks for leaks or signs of wear

• Safety checks

• Testing the system is operating correctly

• Advice on any faults or developing issues

For gas boilers, this often includes checking the pressure and testing the flue.

Additional costs to budget for

The boiler service itself is only part of the picture. If problems are found, you may need to budget for follow-on work.

Common additional costs to be aware of include:

• Boiler repairs: boiler repairs cost on average £120–£750 for parts and labour

• Emergency boiler repairs: if the boiler breaks down unexpectedly, emergency repair costs are typically around £225–£675

• Gas Safety Certificate (for landlords): if you’re a landlord, the cost of a Gas Safety Certificate typically ranges from £60–£90 for a property with one boiler and one gas hob or fireplace to check

• Powerflushing or system cleaning: some systems may need additional work to remove sludge and improve performance

Why is a boiler service worth paying for?

There are a few reasons homeowners book an annual servicing, even when the boiler seems to be working fine.

A boiler service can help:

• Make sure the boiler is safe to use (and isn't releasing toxic fumes)

• Reduce the risk of breakdowns (and potentially costly emergency call-out fees)

• Catch smaller problems (before they become expensive repairs)

• Keep the system running efficiently (which can help lower your energy bills)

• Help maintain manufacturer warranty cover (so you can continue to receive free repairs during the warranty period)

• Extend the lifespan of the boiler (avoiding the expense of a new boiler)

For a lot of people, the biggest immediate benefit is simply peace of mind — especially before the colder months arrive.

6 reasons you should service your boiler

Energy prices have skyrocketed. So the last thing you probably want is to fork out on servicing your boiler! But did you know an annual boiler service could actually save you money?!

Learn more

How long does a boiler service take?

A boiler service is usually a relatively straightforward appointment, but the exact time will depend on the type of boiler and what your engineer finds during the inspection.

If your boiler is easy to access and in good working order, the visit is normally quite routine. If there are faults, signs of wear, or more detailed checks are needed, the appointment may take longer or lead to further work being recommended.

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Boiler service cost calculator

If you’re trying to budget ahead, our boiler service cost calculator can help you estimate what you might spend.

To get a rough idea of the total cost, consider the type of boiler you have, whether you want a one-off service or boiler cover, the cost of any likely repairs, whether emergency call-out fees might apply.

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The calculator provides a guide price as a starting point only. For an accurate quote, it’s always best to speak to a qualified local engineer.

Can you service a boiler yourself?

Boiler servicing should only be carried out by a qualified professional. This is a legal requirement to make sure the boiler is safe, efficient, and working as it should.

• Gas boilers must be serviced by a Gas Safe registered engineer

• Oil boilers should be serviced by an OFTEC qualified engineer

There are some simple maintenance checks you can do yourself, such as checking for visible leaks, making sure the pilot light looks healthy, and regularly bleeding your radiators. But the boiler service itself is a professional job.

Tips to keep boiler service costs down

• Book a service once a year rather than waiting for a problem

• Compare a few local quotes before booking

• Ask what’s included in the service

• Check whether adding boiler cover to your home insurance is cheaper than taking out a separate plan

• Don’t ignore early warning signs such as higher bills, cold radiators, or a thermostat that isn’t responding

Boiler service cost checklist

• What type of boiler do you have?

• Was it serviced in the last 12 months?

• Do you want a one-off service or monthly cover?

• Is the engineer qualified for your boiler type?

• Are you trying to prevent issues or deal with an existing fault?

• Have you compared quotes from local engineers?

When should you speak to a heating engineer?

If your boiler hasn’t been serviced in the last year, is showing signs of poor performance, or you simply want reassurance before winter, it’s worth getting booked in sooner rather than later.

A reliable heating engineer can tell you whether the boiler is working safely, flag up any early issues, and help you decide whether a one-off service or ongoing cover makes more sense for your situation.

Find boiler service engineers near you

If you’re ready to book a boiler service, comparing checked local engineers is a good place to start.

Look for someone who is properly qualified for your boiler type, explains clearly what’s included, and has strong recent reviews for reliable service.

Enter your postcode to compare checked boiler service engineers near you.

FAQs

What is the average cost of a boiler service in the UK?

The average boiler service cost in the UK is around £100. Most homeowners pay between £90 and £100, depending on the type of boiler and the engineer carrying out the service.

How much should it cost for a boiler service?

For most homes, a boiler service usually costs between £90 and £100. Prices can vary depending on the boiler type, location, and whether any issues are found during the visit.

How much should a full boiler service cost?

A full boiler service usually falls within the same general range as a standard annual service. As a guide, gas boiler services are typically £80–£120, oil boiler services £75–£110, and electric combi boiler services £70–£110.

How much does it cost to service an Ideal boiler?

Servicing an Ideal Boiler normally costs around £180–£300. Our Ideal Boiler servicing cost guide has more information.

How often should you service a boiler?

A boiler should usually be serviced once every 12 months. Annual servicing helps keep the system safe, improve efficiency, and may be required to keep the manufacturer warranty valid.

Do I legally have to have my boiler serviced?

Unless you’re a landlord, boiler servicing is not usually a legal requirement. However, annual servicing is strongly recommended to keep your heating system safe and running efficiently.

Why does a boiler service cost so much?

A boiler service involves safety checks, performance testing, and inspection of internal components by a qualified engineer. In most cases, the cost is small compared with the expense of a breakdown or emergency repair.

Does regular boiler maintenance save money?

In many cases, yes, regular boiler servicing can reduce the risk of costly repairs, improve efficiency, and help your boiler last longer.

How do you find a reliable boiler service provider?

To find a reliable service provider, check that the engineer is qualified for your boiler type — Gas Safe registered for gas boilers and OFTEC qualified for oil boilers. It’s also sensible to compare quotes, read recent reviews, and confirm exactly what’s included in the service.

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