The short answer
Most drivers who cover 12,000 miles or fewer per year need one full service every 12 months. An interim service at six months sits on top of that for high-mileage or hard-working cars. Your owner’s handbook has the final word, not the garage’s service menu.
What each service actually is
Three tiers get thrown around by garages. Here is what they mean in plain English.
Interim service: This is the lighter, faster check. It takes around one hour and covers the essentials: engine oil and oil filter replacement, fluid level checks, tyre pressure, and a visual inspection of the brakes and lights. The RAC describes it as a preventative measure between more thorough checks, suited to high-mileage drivers or anyone putting their car through harder-than-average use.
Full service: This takes up to 90 minutes and covers everything in an interim service plus a broader inspection. That means the air filter and pollen filter, brake fluid condition, drive belt check, suspension and steering assessment, and a detailed look at the exhaust and braking system. Kettering Motorist Centre recommends a full service every 12 months or 12,000 miles, whichever comes first.
Major service: Some garages offer a third level. It adds the longer-interval items: brake fluid replacement, coolant renewal and, where due, spark plugs. Most cars need one roughly every two years or 24,000 miles. Think of it as a full service with the two-yearly consumables included.
How the intervals are decided
There are two systems in use across the UK car parc.
Fixed intervals apply a set schedule regardless of how you drive, typically 12 months or a set mileage. Common on older cars and many mainstream models.
Variable or long-life intervals use onboard sensors to estimate when the oil and other fluids actually need changing, based on your driving patterns. Freeplatecheck.co.uk notes that lots of short cold trips, towing or stop-start traffic will shorten the interval, while steady motorway driving extends it. The dashboard will show a countdown or a spanner symbol.
To give you an idea of how this varies by brand, here are some indicative intervals. Always cross-check with your own handbook, as manufacturers occasionally revise these by model year.
- Ford: 12 months or 12,500 miles on a fixed schedule across most models
- Volkswagen: 12 months or 9,000 miles on fixed, or up to 20,000 miles on LongLife. Use fixed if you do short trips
- BMW: Condition-based servicing, typically 18 to 24 months or 18,000-plus miles, with a dashboard countdown per fluid and wear item
- Mercedes-Benz: 12 months or 15,500 miles, alternating between Service A (broadly interim) and Service B (broadly full)
- Toyota: 12 months or 10,000 miles, with hybrids following the same schedule as petrols
- Hyundai and Kia: 12 months or 10,000 miles. Sticking to this matters for the long manufacturer warranty
- Vauxhall: Newer models use a flexible computer-based schedule, often up to 20,000 miles
- Electric vehicles (Tesla and most others): Around 24 months for most items, brake fluid every two years, cabin filter every two to three years, and tyre rotation every 6,250 miles
Sources: Protyre, Freeplatecheck.co.uk.
The 12-months-or-12,000-miles rule is a widely used industry convention. It is not a legal requirement. Your car’s own handbook takes precedence over any generic advice, including this article.
Does it affect you?
If you cover average mileage and do a reasonable mix of town and motorway driving, a full service once a year is likely all you need. The RAC states that an interim service is designed for drivers who use their vehicles frequently on longer trips or in demanding conditions.
Short urban journeys are harder on oil than long motorway runs because the engine never fully warms up. If most of your driving is in town, at low speeds or involves frequent cold starts, your oil degrades faster than the mileage figure suggests. An interim service every six months is worth considering in that case.
If your car has a long-life or variable service schedule, adding an interim service on top may not be necessary. Check what the manufacturer actually says before paying for one.
A note for EV drivers: servicing is less involved than for petrol and diesel cars, but it is not zero. Brake fluid, cabin filters and tyres still need attention on a schedule. If you want the broader picture, our guide to charging at home covers the ownership basics.
What it costs in 2026
These are typical ranges, not fixed quotes. Your actual price will depend on your car’s make, engine size, age, where you live and whether you use a main dealer or an independent garage.
BookMyGarage booking data covering January 2024 to December 2025, reported by G-Force Tyres, puts average UK costs at:
- Interim service: around £141
- Full service: around £180
- Major service: around £237
The RAC, cited by costofthings.co.uk, quotes an average full service cost of £298.60, with small cars typically at £170 to £210, medium cars at £210 to £300, and large cars at £400 or more.
The gap between those two sets of figures reflects the sources rather than an error. The BookMyGarage data leans toward independent garages that compete on price through an online platform. The RAC figure draws from a wider pool including main dealers. Neither is wrong; they just measure different things.
Independent garages average around £76 per hour in labour, while franchised dealers average around £141 per hour, according to easynumberplates.com. Main dealers typically charge 25 to 40 per cent more than independents for the same work. Prices in London and the South East tend to run roughly 15 to 25 per cent above the national average.
Skipping a service to save money tends to cost more in the long run. Research published in 2025 found that 68 per cent of UK drivers had skipped or delayed at least one maintenance item in the previous 12 months, and the average unexpected repair bill exceeded £600 in that same period. A missed oil change in particular can cause engine damage that a service six months later cannot undo.
Common myths and misunderstandings
“My car passed its MOT so it does not need a service.” These are two completely separate things. The MOT is a legal annual roadworthiness inspection administered by the DVSA. It tests the car at a point in time but changes no parts and replaces no fluids. A car can pass its MOT and still be badly overdue for an oil change. Our article on MOT advisories explained covers what those test results actually mean.
“An interim service protects my warranty.” It might help, but the interim service is generally supplementary to the main schedule. What protects your warranty is following the manufacturer’s own service schedule with documented evidence of each service done on time. Missed scheduled services can void cover.
“A stamped service book means full service history.” It means stamps are present. A full service history means every scheduled service done on or close to time, with dated invoices that itemise the work and confirm that the big-ticket items (cambelt, brake fluid, spark plugs where due) were completed. Check the invoices, not just the stamps.
“Electric cars do not need servicing.” They need less servicing, not none. Brake fluid, cabin filters, tyre rotation and coolant checks still apply on a schedule.
What is still unknown or changing
EV service schedules are still settling down. Manufacturers are adjusting intervals as they gather real-world data on how battery packs, brake systems and thermal management behave over time. If you own an EV, check the handbook annually because the recommended intervals may have been updated since you bought it.
Software-driven service reminders are also becoming more common on newer cars, with some manufacturers pushing service notifications directly to an app. This does not replace reading the handbook; it supplements it.
What to do next
- Find your own car’s schedule. Open the owner’s handbook and look up the service schedule section. If you do not have one, findservicehistory.com offers a service schedule checker by registration.
- Decide which service tier you actually need. Average mileage, mostly mixed driving: annual full service. High mileage or hard urban use: add an interim at six months. Long-life variable schedule: follow the dashboard countdown and check the handbook before adding anything.
- Compare quotes. Use an online booking platform such as BookMyGarage or similar to get independent garage quotes alongside a dealer price for the same job.
- Check your service history. If you are buying a used car, look beyond the stamps. Ask for dated invoices. A used car with incomplete records is a negotiating point, and our used car test drive checklist covers the other questions worth asking before you hand over any money.
- Book with a qualified mechanic for anything beyond a visual check. Oil and filter changes can be DIY territory for experienced home mechanics, but brake fluid replacement, drive belt inspection and suspension assessment should be left to a qualified professional with the right tools and lift equipment.
