Boiler servicing costs are an investment that pays dividends in safety and longevity. This breakdown shows you exactly what you're paying for and why annual servicing is worth it.
2026 Boiler Service Pricing
| Boiler Type | Service Cost | Certificate Included |
|---|---|---|
| Combi Boiler (standard) | £120–150 | Yes (Gas Safe) |
| System Boiler | £130–160 | Yes (Gas Safe) |
| Regular/Conventional Boiler | £140–180 | Yes (Gas Safe) |
| Oil Boiler | £150–200 | Depends on engineer |
| Additional items (thermostat, pump, etc.) | +£50–100 each | - |
What's Included in a Boiler Service?
A full service covers:
- Safety checks - Gas tightness, ventilation, flue operation, carbon monoxide levels
- Visual inspection - Condition of boiler, pipes, and connections
- Efficiency test - Fuel input/output to ensure optimal performance
- Cleaning - Burner, heat exchanger, and internal components
- Seal replacements - Worn gaskets and seals
- Controls check - Thermostat, valves, and safety devices
- Gas Safe certificate - Proof of professional maintenance for landlords and insurance
Why Pay for Annual Servicing?
Safety
Annual servicing catches dangerous issues like gas leaks, carbon monoxide problems, and ventilation blockages before they become life-threatening.
Longevity
Regular maintenance can extend your boiler's lifespan by 3–5 years. A well-serviced 12-year-old boiler will outlast a neglected 8-year-old one.
Warranty protection
Most boiler warranties (5–10 years) require annual servicing. Skip a service, and you void your warranty. One repair without coverage can cost £300–800.
Cost savings
- £150 annual service = £1,500 over 10 years
- One emergency repair = £300–600 (vs. scheduled maintenance at £150)
- Efficient boilers use less gas - a clean, tuned boiler saves £30–60/year on fuel bills
Gas Safe Certificate
Landlords are legally required to provide a Gas Safe certificate annually. Tenants should request it. Cost: included in the service.
Extra Costs to Be Aware Of
Additional repairs found during service
If the engineer finds a fault during servicing, they'll quote you for the fix:
- Seal replacement: £50–100
- Thermostat replacement: £100–200
- Pump replacement: £200–400
- Heat exchanger cleaning/replacement: £300–800
Call-out fees (if not part of annual plan)
If you call an engineer for an emergency outside a service plan, expect:
- Call-out fee: £60–100 (often waived if you book a repair)
- Diagnosis: included in call-out
- Labour for repairs: £60–100/hour (usually 1–2 hours for standard fixes)
Boiler Service Plans vs. One-Off Service
One-off service
- Cost: £120–150 per year
- Pro: No commitment, good if you're selling/renting short-term
- Con: Easy to forget to rebook
Annual service plan (subscription)
- Cost: £150–200/year (or £40–50 upfront + £100/year)
- Pro: Automatic reminders, priority booking, sometimes includes minor repairs
- Con: Slightly higher cost, but more reliable
Boiler cover/insurance plans
- Cost: £15–30/month (includes service + emergency repairs)
- Pro: Peace of mind - repairs covered if something breaks
- Con: Claims can have limits; check small print
When to Get Your Boiler Serviced
- Ideally: Late summer (August–September) before the heating season
- Why: Engineers are less busy, so faster appointments
- Emergency servicing: If you rely on your boiler, avoid booking during peak winter when wait times are long
Cost Comparison: New vs. Old Boiler
Servicing a 10-year-old boiler
- Service: £150/year × 10 = £1,500 total
- Repairs: ~£200/year average = £2,000 over 10 years
- Total: ~£3,500
Replacing with a new boiler
- New boiler + installation: £2,500–4,000
- Service: £150/year × 10 = £1,500 total
- Total: ~£4,000–5,500
The break-even point is around 10–12 years. Older boilers cost more to service and repair; newer ones are more efficient and cheaper to run.
What Happens If You Skip a Service
Skipping a service doesn't just risk a bigger repair bill later - it can also invalidate your boiler's manufacturer warranty, most of which require proof of annual servicing to remain valid.
Unserviced boilers also run less efficiently over time as components wear and dirt builds up in the system, meaning higher energy bills even before anything actually breaks down.
How to Get the Best Value
Booking your service at the same time each year, ideally before the heating season starts in autumn, means faults get caught before you actually need the heating, rather than discovering a problem on the coldest week of the year.
If you're comparing quotes, check exactly what's included - a genuine full service checks the burner, heat exchanger, flue, gas pressure and all safety devices, not just a quick visual look at the unit.
What's NOT Usually Included
A standard service doesn't cover replacement parts if something is found to be worn or faulty during the inspection - these are usually quoted separately once identified, so you can decide whether to proceed.
It also doesn't include a full power flush or system-wide sludge removal, which is a separate job if your heating system needs it.
Choosing a Service Provider
Always confirm the engineer is Gas Safe registered and ask to see their ID card - this is a legal requirement for anyone working on gas appliances, not an optional extra.
A written, itemised invoice and service record are worth insisting on, both for warranty purposes and so you have a clear history if you ever sell the property.
Regional Pricing Factors
Boiler servicing costs can vary depending on your location, the age and complexity of your boiler, and whether any additional checks are needed alongside the standard service. In and around Coventry and Nuneaton, our pricing reflects local market rates while remaining transparent - you'll always know the cost before we start, regardless of what we find during the inspection.
Combi boilers are generally quicker to service than system or regular boilers with a separate cylinder, since there are fewer components to check, which is sometimes reflected in slightly different pricing between boiler types.
Servicing Multiple Properties
Landlords and letting agents managing several properties can often arrange servicing across all of them in a coordinated schedule, reducing admin and making sure nothing gets missed across a portfolio. We can also combine a boiler service with the annual gas safety certificate visit where both are due, saving a separate call-out.
For larger portfolios, a maintenance agreement covering multiple properties can work out more cost-effective than booking each service individually, and gives you a single point of contact for all your gas safety compliance.
Quick Questions
Is a boiler service tax deductible for landlords? Yes, boiler servicing is generally an allowable expense for rental properties - it's worth keeping your invoice for your tax records.
Can I book a service and gas certificate together? Yes, we can combine both visits where they're due around the same time, saving you a separate call-out fee.
Whatever your boiler's age or type, the cost of an annual service is small compared to the cost of an unexpected breakdown - both in terms of the repair bill itself and the inconvenience of being without heating or hot water while it's fixed. Booking it in as a routine, once-a-year job is the simplest way to avoid that situation altogether.
Ready to book your annual service? Call us on 02476 950 595 or use our online form, and we'll find a slot that suits you before your boiler needs it most.
Ready for Your Annual Boiler Service?
Gas Safe registered engineers. Fixed pricing, no surprises. Book online or call.
Get a Quote: 02476 950 595Key Takeaways
- Standard boiler service costs from £75 and includes a Gas Safe certificate
- Annual servicing catches safety issues, extends boiler life, and protects your warranty
- One emergency repair can cost more than 2–3 years of preventative servicing
- Service in late summer to avoid peak-season delays
- Compare one-off services, annual plans, and boiler insurance to find the best value for your needs