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.
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 £120–150 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