TL;DR — Boiler Service Cost At A Glance
- A boiler service typically costs £70 – £150 inc VAT, with £100 – £120 the most common spend across the UK.
- London and the South East add roughly £20 – £40 to the standard price.
- Prices vary by boiler type and fuel — gas combi and system boilers sit mid-range, while oil boilers cost a little more to service.
- A service must be carried out by a Gas Safe registered engineer for gas boilers (OFTEC for oil).
- An annual service keeps the manufacturer's warranty valid, catches faults early and helps the boiler run efficiently.
- A one-off service is cheaper per visit when bundled with boiler cover or booked outside the autumn peak.
Book an annual boiler service with a Gas Safe registered engineer — check prices and book online or call to arrange a convenient slot.
How Much Does A Boiler Service Cost In 2026?
An annual boiler service in the UK costs £70 – £150 inc VAT, with most households paying £100 – £120. In London and the South East, add around £20 – £40 to reflect higher labour rates. A standard service is a fixed-price, one-off job that usually takes 30–60 minutes for a routine gas boiler.
The price mainly reflects your boiler type and fuel, your location, and whether the service is a standalone booking or part of a cover plan. Landlords have an extra consideration: a gas boiler in a rented property needs an annual Gas Safety check (CP12), which is sometimes combined with a service for a slightly higher fee.
It's worth knowing what you are paying for. A proper service is more than a five-minute glance at the boiler — a Gas Safe engineer checks combustion, gas pressure and safety controls using calibrated equipment, then records the results. Combi, system and heat-only boilers take a broadly similar amount of time, so the headline price is comparable; the bigger swings come from fuel type and region rather than the exact model on your wall.
Here is what a boiler service typically costs across the UK in 2026:
| How you book | Rest of UK | London & South East |
|---|---|---|
| Standard annual service | £70 – £120 | £90 – £150 |
| Service + Gas Safety certificate (landlord CP12) | £90 – £150 | £110 – £180 |
| Service included in boiler cover | often bundled into the monthly premium | often bundled into the monthly premium |
Figures include VAT and reflect 2026 market rates. The exact price depends on your boiler and postcode — get a fixed quote here.
Boiler Service Cost By Boiler Type
Most boilers take a similar amount of time to service, but fuel type makes a difference — oil boilers involve more checks, so they cost a little more. These are typical service prices by boiler type.
| Boiler type | Rest of UK | London & South East |
|---|---|---|
| Gas combi boiler | £70 – £110 | £90 – £130 |
| Gas system boiler | £70 – £110 | £90 – £140 |
| Gas heat-only (conventional) boiler | £70 – £110 | £90 – £140 |
| Electric boiler | £60 – £100 | £80 – £120 |
| Oil boiler | £80 – £130 | £100 – £160 |
Prices are for a standard domestic boiler in reasonable condition. Boilers that are hard to reach, heavily sooted or overdue for attention may take longer.
What Affects The Cost Of A Boiler Service?
A boiler service is fairly standardised, but a few things move the price.
1. Boiler Type And Fuel
Gas combi, system and heat-only boilers are broadly similar to service. Oil boilers cost more because they need extra checks such as the burner and nozzle. Electric boilers are the simplest, with no combustion to test.
2. Your Location
London and the South East run higher on labour, adding roughly £20 – £40 over the rest of the UK for the same work.
3. Standalone Service Or Cover Plan
A one-off service is charged as a fixed fee. If you hold boiler cover, an annual service is often included in the monthly premium, so there's no separate charge.
4. Landlord Gas Safety Check
Landlords legally need an annual Gas Safety certificate (CP12) for gas appliances. Combining this with a service usually costs a little more than a service alone but less than booking the two separately.
5. Boiler Condition And Access
A neglected boiler that needs cleaning, or one in an awkward spot such as a loft, can take longer. If the engineer finds a fault, any repair is quoted separately from the service.
What's Included — And What's Not
A standard boiler service usually includes:
- A visual inspection of the boiler and its components
- Checking the flue and combustion (a flue gas analyser reading on gas boilers)
- Testing gas pressure and flow
- Inspecting seals, the heat exchanger and key parts for wear
- Cleaning components as needed
- Checking system pressure and safety devices
- A service record for your warranty and, for landlords, a Gas Safety certificate where booked
Usually not included:
- Repairs or replacement parts if a fault is found (see the boiler repair cost guide)
- A power flush or system clean (see the power flush cost guide)
- Descaling or major cleaning of a badly neglected boiler
- Work on radiators or other parts of the heating system
If the engineer spots a problem during the service, ask for a written quote before agreeing to any repair.
Can You Do It Yourself?
No. A boiler service on a gas appliance must be carried out by a Gas Safe registered engineer — it involves testing combustion, gas pressure and safety devices with specialist equipment such as a flue gas analyser, which a homeowner cannot legally or safely replicate. Oil boilers require an OFTEC registered engineer.
What you can do between services is simple upkeep: check the pressure gauge sits in the normal range, keep the boiler and flue area clear, bleed radiators if they have cold spots, and watch for warning signs such as unusual noises or a yellow flame. Anything beyond that belongs to a qualified professional.
How To Save Money On A Boiler Service
- Book in spring or summer — engineers are quieter than in the autumn rush, and it keeps the boiler ready for winter.
- Bundle the service with a landlord Gas Safety check if you rent the property out, rather than paying for two visits.
- Consider boiler cover if you want the service rolled into a predictable monthly cost.
- Stay on schedule — an annual service keeps the warranty valid and prevents small issues becoming expensive repairs.
- Keep your service records so the manufacturer's warranty stays intact and the boiler's history is easy to prove when you sell.
- Get a fixed price up front so there are no surprises on the day.
How To Hire A Good Heating Engineer
Check that the engineer is on the Gas Safe Register for gas work (OFTEC for oil) — ask to see the ID card and verify the number on the official register. Confirm they are insured, that the service follows the manufacturer's checklist, and that you receive a written service record. Fixed, transparent pricing avoids any add-ons appearing at the end.
With Fantastic Services, you get Gas Safe registered engineers, upfront pricing and easy online booking — arrange an annual service, or a service plus landlord certificate, in a few clicks.
Frequently Asked Questions
How Much Does A Boiler Service Cost In 2026?
A standard annual boiler service costs £70 – £150 inc VAT, with most people paying £100 – £120. London and the South East add roughly £20 – £40. Oil boilers cost a little more to service than gas.
How Often Should A Boiler Be Serviced?
Once a year is the standard advice, and most manufacturers require an annual service to keep the warranty valid. Landlords also need an annual Gas Safety check on gas appliances in rented properties.
What Does A Boiler Service Include?
A service covers a visual inspection, flue and combustion checks, gas pressure testing, inspection of seals and key parts, cleaning where needed, and a safety check. On completion you get a service record, plus a Gas Safety certificate if that has been booked.
Is A Boiler Service A Legal Requirement?
For homeowners it is not a legal requirement, but it keeps the warranty valid and the boiler safe. For landlords, an annual Gas Safety check on gas appliances is a legal requirement, and this is often combined with a service.
Does A Boiler Service Have To Be Done By A Gas Safe Engineer?
Yes, for gas boilers. Any work on a gas appliance must be carried out by a Gas Safe registered engineer. Oil boilers should be serviced by an OFTEC registered engineer.
How Long Does A Boiler Service Take?
A routine service on a gas boiler usually takes 30–60 minutes. It can take longer if the boiler is hard to access, hasn't been serviced for a while, or needs extra cleaning.
Can A Boiler Service Save Money?
Often, yes. A well-serviced boiler runs more efficiently and is less likely to break down, so an annual service can reduce running costs and help you avoid a larger repair or early replacement bill.
Boiler Service Prices UK [2026]
As a member of the Fantastic club, you can get £30 OFF for 10 different services within 1 year.
| Appointments | Monday - Saturday 8am - 4pm | Prices | Fantastic Club price | Standard price |
|---|---|---|---|---|
| Boiler Service | £98 | £128 | ||
| Boiler Service Plus | £105 | £135 | ||
| Landlord Gas Cert.(up to 2 appliances) | £91 | £121 | ||
| Landlord Gas Cert.(3 to 4 appliances) | £94 | £124 | ||
| Boiler Service & Landlord Gas Certificate | £186 | £216 | ||
Join the Fantastic Club and get:
- £300 in credits
- Preferential member rates
- Domestic cleaning from £18/h
- Plant a tree
- Priority booking & case handling
T&C and Minimum Charges apply. When we calculate the price, we also take into consideration the area's dimensions and the time of the appointment. All prices and deals are valid for areas within M25. Deals cannot be combined with any other deals and promotions. Prices are subject to availability. Congestion charges are excluded (when applicable).
