Servicing / Page 07
Boiler service cost UK 2026.
A boiler service costs £80 to £120 and takes a Gas Safe engineer about 30 to 60 minutes. Skipping it can void your warranty and cost you thousands. Here is the full breakdown.
Average UK
£90
Mid-point of the £60 to £120 typical range.
Cheapest
£60
Local Gas Safe engineer, North East or Yorkshire.
Most expensive
£150
London, manufacturer-accredited service.
What a service includes
- Visual inspection of the boiler casing, flue and condensate pipe
- Flue gas analysis (FGA): combustion ratios, oxygen, CO and CO2 readings
- Boiler operating pressure check, top-up if needed
- Combustion check, burner cleaning if needed
- Condensate trap inspection and clean
- Heating and hot water controls test, thermostat operation
- Gas tightness check on the supply
- Issuing a Benchmark service record or Gas Safe certificate
What it does NOT include
- Powerflush (£300 to £500, separate quote)
- Magnetic system filter installation (£100 to £150 if not already fitted)
- Radiator balancing (£60 to £120)
- Replacement parts beyond consumables (varies)
If your engineer recommends extras, get a written quote before saying yes.
Provider price comparison
| Provider | Cost | Scope | Notes |
|---|---|---|---|
| Local Gas Safe engineer | £60 to £90 | Standard service, certificate, no breakdown cover | Best value if you book a known engineer. |
| British Gas (one-off) | £99 | Standard service, certificate | Convenient booking, no negotiation. |
| HomeServe (one-off) | £120 | Standard service, certificate | Often bundled with boiler cover quotes. |
| OVO HomePlan service-only | £8 to £10/month | Annual service plus limited cover | Subscription model, cancellable annually. |
| Boiler manufacturer accredited | £100 to £150 | Service plus warranty preservation | Required by some long-warranty brands. |
Boiler cover vs pay-per-service
Boiler cover only pays back if your boiler breaks. The honest breakeven is one repair every two to three years.
| Plan | Cost | Repairs | Best for |
|---|---|---|---|
| Pay-per-service | £80 to £120 / yr | Charged at callout | Newer boilers under 5 years old |
| Service-only plan | £100 to £150 / yr | Charged at callout | Reminders matter to you |
| Boiler cover (basic) | £12 to £18 / month | Boiler only, parts and labour | Boilers 5 to 10 years old |
| Boiler cover (full home) | £18 to £30 / month | Boiler, controls, plumbing, drains | Older systems, no DIY appetite |
Sample monthly costs from major UK providers (April 2026). Always check excess, parts caps, and the first-year exclusion period.
Regional pricing
| Region | Typical service cost |
|---|---|
| London | £95 to £130 |
| South East | £85 to £120 |
| South West | £75 to £110 |
| East Anglia | £75 to £105 |
| West Midlands | £70 to £100 |
| East Midlands | £70 to £100 |
| North West | £65 to £95 |
| Yorkshire | £60 to £90 |
| North East | £60 to £90 |
| Scotland | £65 to £95 |
| Wales | £65 to £95 |
| Northern Ireland | £60 to £90 |
What happens if you skip servicing
- Efficiency drops 5 to 15% over 3 years. Soot, debris and inefficient combustion lift gas use. £40 to £100 a year wasted.
- Warranty void. Almost every UK manufacturer requires annual service. A failed heat exchanger out of warranty is £400 to £800 versus zero on a valid claim.
- Safety risk. Cracked heat exchangers can leak carbon monoxide. Working CO alarms are mandatory in every room with a gas appliance, but a service catches the cause.
- Emergency callout cost. £150 to £300 for an unplanned visit, often more out of hours, versus £80 to £120 planned.
FAQ
Do I need a boiler service every year?
Practically yes. Annual servicing is required by every major UK manufacturer to maintain the warranty, and by law for landlords. For owner-occupiers it is best practice rather than a legal requirement, but skipping it typically voids warranty and costs more in unplanned callouts than the £80 to £120 you saved.Will skipping a service void my warranty?
Almost certainly. Worcester Bosch, Vaillant, Viessmann, Baxi, Ideal and Alpha all require an annual service by a Gas Safe engineer for the warranty to remain valid. The service must be recorded on the Benchmark or in the boiler's installation manual. Some brands accept a digital service record, others still require the paper form.Is British Gas boiler cover worth it?
It depends on your boiler's age and your repair appetite. For a boiler over 7 to 8 years old, with no DIY skills and no preferred local engineer, full HomeCare at £25 to £30 a month buys peace of mind. For a 2-year-old Worcester with full warranty, it is poor value: you are duplicating cover you already have. The break-even is roughly one breakdown every 2 years.What is a CP12 certificate?
The CP12 is the gas safety record landlords are legally required to obtain annually for any property they let. A Gas Safe engineer checks all gas appliances and the gas pipework, then issues the certificate. CP12 inspections cost £60 to £100 and usually include the boiler service. Owner-occupiers do not need a CP12 but the same paperwork is good practice.