When should you buy a used car?

Buying a car, even a used one, is a big financial decision. Prices fluctuate throughout the year depending on supply, demand, new model launches, and even seasonal trends. Timing your purchase can save you hundreds, and sometimes even thousands, of pounds. 

If you’re wondering “When is the best time to buy a used car in the UK?”, here’s a quick summary: 

• End of the month, especially March, June, September, and December 
• Just before new number plate releases (February and August) 
• After a new model launch 
• During autumn and winter, particularly October to December 

These windows give you more choice and better deals when buying your next car. 

Dealers have monthly sales targets, and they’re more likely to offer discounts or extras at the end of the month to hit them. The effect is even stronger at the end of each quarter - March, June, September, and December - when managers are keen to hit quarterly goals. 

Pro tip: If you see a car you like early in the month, it might pay to wait a couple of weeks. But be aware that someone else could snap it up! 

In the UK, new number plates are issued twice a year: March and September. This often gives new life to the used car market: 

• Many owners trade in their cars for the latest models, increasing the number of used cars available. 
• With more stock to shift, dealers are often more flexible on price. 
• Cars with the “old” plate may drop in value faster because they feel less current. 

Best months to shop: February and August. You’ll have more choice and better deals before the plate changes. 

When a new version of a car is launched, particularly a full redesign or facelift, the older model often drops in value. Demand shifts to the newer model, supply of used cars increases, and dealers want to make space for fresh stock. 

This effect is strongest for popular models, like SUVs or family cars. If you’re not after the absolute latest version, buying right after a new model launch is a clever way to save. 

Key takeaways: 

• Many owners trade in their cars for the newest model, increasing the pool of used cars on the market 
• Older models often lose value quickly once the replacement is released
• More stock means more competitive pricing and greater room to negotiate 

Timing isn’t just about months; seasonal trends also play a role: 

• Spring and early summer: Prices can be higher due to increased demand. Graduates buying their first car, families planning holidays, and general warm-weather optimism all drive sales. 
• Autumn and winter: Demand slows as people tighten budgets with Christmas approaching. Dealers become more flexible, making October through December an excellent window for a new (used) car.

The festive period can also affect prices. Black Friday, Christmas, and New Year promotions often include used cars, as dealers aim to clear inventory before the next year. 

December is particularly strong: end-of-month, quarterly, and year-end targets all align, so you may see the best discounts. Plus, fewer buyers are shopping during the festive period, meaning less competition for you. 

To recap, the best times to buy a used car in the UK are: 

• End of the month and quarter (March, June, September, December) 
• Before number plate changes (February, August) 
• After a new model launch 
• During autumn and winter (October–December) 

Keep these periods in mind, and you’ll have the best chance of finding a quality car at a great price. 

At SERE Motors, we have a huge selection of quality used cars across all makes and models, as well as new SEAT and KGM vehicles. With showrooms in Belfast and Lisburn, plus fresh stock arriving all the time, we can help you find the right car at the right price. 

Whether it’s your first car, a family SUV, or a sporty upgrade, we’re here to guide you. 

Browse our latest stock or visit a showroom today, your next car is waiting. 

*Terms and conditions apply. Subject to availability. Prices and offers correct at time of publication.