A one-off Baxi service usually costs about the same as any other gas boiler. Here is what you should expect to pay, what a Gas Safe engineer actually checks, and how an annual service ties into your warranty and your cover.
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.
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.
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:
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.
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.
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.
There are two common ways to keep your annual service ticking over without remembering to book it each year:
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.
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.
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.
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.
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.
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.