The UK Motoring Calendar: Every Date That Costs You Money
Running a car doesn't cost you the same amount every month. It costs you in lumps. A tax rise here, an MOT there, a flat battery on the coldest morning of the year, and a renewal quote that somehow went up while you weren't looking.
The frustrating part is that most of those lumps land on the same dates every single year. Car tax changes on 1 April. The plates change on 1 March and 1 September. Garages are rammed in the same two months, every time. None of it is a surprise, and yet it catches most of us out anyway.
So here's the whole year, laid out month by month, with the dates that actually cost you something and what you can do about each one before it lands.
The dates worth putting in the diary
| DATE | WHAT HAPPENS | WHO IT AFFECTS |
| 1 January | Insurance renewal season and congestion charge changes | Most drivers |
| 1 March | New plate change, first MOT rush | New car buyers, three-year-old cars |
| 1 April | Vehicle excise duty rates change | Every taxed vehicle |
| 6 April | Benefit in Kind rates change | Company car and salary sacrifice drivers |
| September | New plate change, second MOT rush, fuel duty rise | Almost everyone |
| October | Tyre safety month | Every driver |
| November | Autum budget | Every driver |
January: Renewal season
January is expensive for two reasons.
The first is insurance. A huge number of policies renew in January, and this is the month where auto-renewal costs people the most. Your insurer is required to show last year's premium next to this year's on the renewal notice, so compare the two properly rather than glancing at the direct debit and moving on.
The second is the weather. Cold mornings are brutal on tired batteries, and a battery that coped fine in November will often give up in January. If your car has been slow to turn over, or you've been doing a lot of short journeys that never fully recharge it, get it tested before it strands you.
Congestion and clean air charges also tend to change at the start of the calendar year. The London congestion charge rose to £18 a day from 2 January 2026, and regional clean air zones set their own rates, so check yours rather than assuming.
February: Pothole season
February is when the freeze and thaw cycle does its worst. Water gets into cracks in the road, freezes, expands, and takes a chunk of tarmac with it. That's why potholes seem to appear overnight in late winter.
The damage lands on tyres, alloys, tracking and suspension, and it is rarely cheap. If you hit one hard enough to feel it through the wheel, get the alignment checked, because a car that pulls slightly to one side will chew through a tyre far faster than it should.
You can also claim. Councils have a duty to maintain their roads, and if you can evidence the location, the damage and the repair cost, it's worth pursuing. Our guide on how to report pothole damage walks through it. Kerbed and cracked alloys are common enough that alloy insurance is worth a look if you're on larger wheels with low-profile tyres.
March: The new plate and first MOT rush
The 1st of March brings the first plate change of the year, which makes it one of the two busiest months in the car trade.
If you're buying, that's good news on availability and often on part-exchange values. It's also the moment to think about GAP insurance, because the gap between what you paid and what your insurer would pay out is widest in the first couple of years.
The less obvious March event is the MOT rush. Cars need their first MOT at three years old, so every March plate change creates a wave of first MOTs exactly three years later, on top of all the renewals from previous years. Garages get busy and appointment slots get scarce. You can have an MOT done up to a month minus a day before your current certificate expires and keep the same renewal date, which is the easiest way to avoid the scramble.
April: Two different tax dates
1 April: Vehicle Excise Duty
Car tax rates change at the start of April every year. For 2026/27 the standard annual rate is £200 for most cars registered after April 2017, and first year rates for the highest emitting new cars reach £5,690.
The Expensive Car Supplement is the one that surprises people. If your car's original list price was over the threshold when new, you pay an extra £440 a year on top of the standard rate, in years two to six of the car's life. That's £640 a year in total, and around £2,200 over the full period. The threshold is £40,000 for petrol, diesel and hybrid cars. For fully electric cars it rose from £40,000 to £50,000 on 1 April 2026.
Two things worth knowing. It's based on the manufacturer's list price including factory-fitted options, not what you actually paid, so a discount doesn't get you under the line. And it follows the car, not the owner, so buying a two-year-old car that triggered it means inheriting the remaining years.
Electric cars are no longer exempt from car tax. EVs registered from 1 April 2025 pay £10 in the first year and then the standard rate.
6 April: Benefit in Kind and Salary Sacrifice
The tax year starts on 6 April, and that's when Benefit in Kind rates move. If you have a company car or a car through a salary sacrifice scheme, this is your date rather than 1 April.
Electric vehicle BiK has been climbing steadily by a percentage point a year. It's still far below the rates applied to petrol and diesel cars, which is why almost every salary sacrifice scheme is built around EVs, but the gap narrows a little each April. If you're weighing up a scheme, our guide to how salary sacrifice works covers the maths, and you can check specific rates with the HMRC company car tax calculator.
May: The quiet month to get ahead
Nothing much happens to drivers in May. If your service is due, or you've been putting off a job you know is coming, this is the cheapest and easiest month to sort it. Booking a car service now rather than in peak season usually means more choice of slots and less pressure on price.
It's also the right time to check the air conditioning, before the first hot week rather than during it. Aircon isn't just about comfort either, it clears a misted screen far faster than the heater will.
June: Driving Abroad and Where Your Cover Stops
The main thing people get wrong is assuming their existing cover travels with them. Comprehensive UK insurance often drops to the legal minimum abroad unless you extend it, and UK breakdown cover usually doesn't cross the Channel. You'll also want to confirm what your destination requires in terms of documentation and equipment, since it varies by country and changes more often than you'd expect.
If someone else is sharing the driving, temporary car insurance is usually simpler and cheaper than adding a named driver to an annual policy for a fortnight.
July and August: Heat, long journeys and bank holidays
Summer is kinder to cars than winter, but long, hot, fully loaded journeys create their own problems.
Heat is hard on cooling systems, and a slow coolant leak that never showed itself in April will find you on the M5 in August. Tyres take a beating too, because pressures rise with temperature and an underinflated tyre carrying a boot full of luggage runs hotter still. Check pressures when the tyres are cold, and check them against the loaded figure in the handbook, not the everyday one.
September: Plate changes, second MOT rush and fuel duty
September is the biggest month in the motoring calendar, and from 2026 it carries a third event.
The plate change on the 1st of September does what March does: more new cars, more part-exchanges, more used stock hitting forecourts a few weeks later. If you're buying used, waiting until October often means better choice.
The second MOT rush follows the same logic as March. September plate cars come up for their first test three years on, and garages fill accordingly.
The new one is fuel duty. The temporary 5p per litre cut that had been in place since March 2022 is being unwound, with the first increase from September 2026 and the full change phased in by March 2027. It won't arrive as a single jump at the pump, but it does mean the direction of travel on fuel costs has changed after more than a decade of freezes.
October: Tyre safety month
October is Tyre Safety Month. The legal minimum tread depth in the UK is 1.6mm across the central three quarters of the tyre, but wet weather braking distances deteriorate well before you get down to that. If you're going into winter close to the limit, you're going into winter on the wrong tyres. Our tyre guide covers what to look for.
November: The Budget and Euro 7
The autumn Budget usually lands in late November, and it's the single most consequential event of the year for motoring costs. Fuel duty, vehicle excise duty and company car tax are all decided here, and the changes announced typically take effect the following April.
November 2026 also brings Euro 7. All newly launched car and van models must meet the standard for type approval from 29 November 2026, while all existing new car models sold on showrooms must comply by late 2027.
December: Flat batteries and Christmas travel
Batteries fail more in December and January than in any other months, and the pattern is predictable. Short journeys, heated screens, lights and wipers all drawing at once, and a battery that never gets fully topped up. If yours is more than four or five years old, get it tested rather than hoping.
If you're doing a long Christmas drive, our festive road trip guide covers the prep, and the winter driving guide covers the conditions.
