Quick answer
A one-off annual Baxi boiler service typically costs around £60–£120 in 2026, broadly in line with other domestic gas boilers rather than a premium-brand price.
The cost depends mainly on your region and the individual engineer, not the Baxi badge, and it can be cheaper booked alongside a repair or included in a boiler-cover plan.
The service must be carried out by a Gas Safe registered engineer, and keeping that annual service recorded is usually what keeps your Baxi warranty valid.
Baxi is one of the most common boiler brands in UK homes, and like every gas appliance it should be serviced once a year by a Gas Safe registered engineer.
The good news is that a Baxi service is not a "premium brand" job — the price is broadly in line with other domestic combi, system and heat-only boilers. Below we set out indicative 2026 costs, what is included, and why skipping the service can quietly invalidate your warranty.
How much does a Baxi service cost in 2026?
As an indicative guide, a one-off annual service for a Baxi boiler typically falls in the range below. Prices vary by region (London and the South East sit at the higher end), by engineer, and by whether the visit uncovers extra work.
| Service type | Indicative 2026 price |
|---|---|
| One-off annual Baxi service (standalone) | ~£60–£120 |
| Service as part of an annual boiler-cover plan | Usually included in the monthly premium |
| Service booked alongside a repair or call-out | Often discounted vs two separate visits |
These are indicative UK ranges for June 2026, not quotes. The exact figure depends on your engineer, your area and the condition of the boiler. Always confirm what is included before booking.
For a wider breakdown across brands and boiler types, see our guide to boiler service costs.
What does a Gas Safe Baxi service include?
A proper annual service is more than a quick glance and a sticker. A competent Gas Safe registered engineer should work through a checklist similar to this:
- Visual inspection of the boiler, flue and any visible pipework for corrosion, leaks or damage.
- A flue gas analysis (combustion test) to confirm the boiler is burning gas safely and efficiently.
- Checking the gas pressure and burner operation against the manufacturer's figures.
- Inspecting and, where needed, cleaning key internal components.
- Checking the system pressure (typically around 1–1.5 bar when cold, rising towards 2 bar when hot) and the condensate drain.
- Confirming safety devices and controls operate correctly.
- Issuing a service record — keep this safe, as it is your proof the service was done.
Safety first. A boiler service is a job for a Gas Safe registered engineer only. Never attempt DIY on the gas valve, internal pipework, the flue, the sealed combustion circuit, the pressure relief valve or the casing. You can confirm an engineer's registration at gassaferegister.co.uk. If you smell gas, call the National Gas Emergency line on 0800 111 999.
What you can safely do yourself
Between services, the only tasks that are homeowner-safe are the simple ones: bleeding radiators, topping up pressure via the filling loop, a single front-panel reset, adjusting the thermostat or programmer, checking the fuse and power, and thawing a frozen external condensate pipe in cold weather.
Anything beyond that — odd noises, lockouts that keep returning, error codes, or pressure that will not hold — means it is time to book a Gas Safe registered engineer.
Why the annual service protects your Baxi warranty
This is the part many homeowners miss. Baxi boilers come with a manufacturer's guarantee, but almost all manufacturer guarantees are conditional on the boiler being serviced every 12 months by a competent (usually Gas Safe registered) engineer, with the service recorded.
Miss a service and you risk a future warranty claim being rejected — meaning a part that should have been covered could end up costing you hundreds.
In other words, the ~£60–£120 you spend on the service is also what keeps a potentially much larger warranty claim valid. Keep every service record and any benchmark/commissioning paperwork together so you can prove the history if you ever need to claim.
Service-only plan vs boiler cover with a service included
There are two common ways to keep your annual service ticking over without remembering to book it each year:
- A service-only plan — you pay a fixed annual or monthly amount and the provider books your service each year. This keeps the warranty valid but does not pay for repairs.
- Boiler cover that bundles an annual service — a maintenance/breakdown plan where the yearly service is included alongside repair cover, parts and labour. You get the service plus protection against the cost of a breakdown.
Which makes sense depends on the age and reliability of your boiler and how much risk you want to carry yourself. If you only want the warranty kept valid, a service-only arrangement may be enough.
If a surprise repair bill would sting, cover that includes the service can be better value over a year. Our guide on what boiler cover is explains how plans are structured, and is boiler cover worth it? walks through the trade-offs.
Check that any plan's "annual service" is a full Gas Safe service with a combustion test and a written record — not just a basic safety check. The detail varies between providers, so read the terms.
Quick checklist before you book
- Confirm the engineer is Gas Safe registered (check the card and the register).
- Ask exactly what the service includes and whether a combustion test is part of it.
- Have your boiler model, age and any past service records to hand.
- Keep the new service record with your warranty paperwork.
- If you already pay for cover, check whether a service is included before paying separately.
Is a Baxi service more expensive than other brands?
No. A Baxi service is typically priced in line with other domestic gas boilers — roughly £60–£120 as a one-off in 2026. Brand has far less impact on the price than your region and the individual engineer.
How often should a Baxi boiler be serviced?
Once every 12 months by a Gas Safe registered engineer. This keeps it running safely and efficiently and is normally required to keep the manufacturer's warranty valid.
Will skipping a service void my Baxi warranty?
It can. Most manufacturer guarantees require a recorded annual service. A missed or unrecorded service may give grounds to reject a later claim, so keep every service record.
Is the service included if I have boiler cover?
Often, but not always. Many cover plans include an annual service while service-only plans cover just the service and no repairs. Always check the specific plan's terms.
Want the bigger picture first? boiler cover comparison across the providers we track.
Bundle your annual service with cover
Compare boiler-cover plans from our selected panel — many include the yearly Gas Safe service that keeps your warranty valid.
Compare boiler coverBoiler Cover UK is an independent comparison site and may earn a commission from providers we feature. We compare a selected panel of plans, not the whole market. Prices are indicative UK ranges for June 2026 and not quotes. This article is general information, not advice — always use a Gas Safe registered engineer for any work on your boiler.