Martin Lewis’ Money Saving Expert team has explained the cheapest day to buy your car insurance - and it could save you hundreds of pounds.
Comparing prices exactly 23 days before your current policy runs out could see you cut your price in half.
MSE analysed more than 70 million quotes from comparison sites to find this optimum time.
Of course, the amount you could save does depend on your individual circumstances and if you have made any claims in the last year.
Money Saving Expert also noted how it is also still similarly cheap a few days either side of this 23-day mark.
But leaving it to the last minute could end up costing you hundreds of pounds more, as MSE says insurers are more likely to view you as higher risk.
The research from Money Saving Expert - which was published in its weekly newsletter - is based on comparison prices, rather than quotes from your existing insurance provider.
Have you made a big saving on your car insurance? Let us know: mirror.money.saving@mirror.co.uk
The MSE team said: "We've told you this for years, so it might not sound like a secret, but we still class it that way as millions DON'T do it.
"But getting quotes at the last minute before renewal means you're actually deemed a higher risk - insurers say such drivers are statistically more likely to claim, so they often pay £100s more.
"If you've less time, hurry, as prices tend to rise the closer you get to renewal."
Car insurance is one of the biggest outgoings for drivers, so it is always worth comparing prices when your renewal date is approaching.
Use sites like Compare the Market and Go Compare to find the cheapest prices.
It comes as car insurance firms have saved billions in the past 12 months as people stayed home, cancelled trips and stopped commuting.
But some providers are offering refunds or reduced rates to reflect fewer people driving.
In more car news, Halfords is giving away MOTs worth £40 with any purchase in stores.
There is no minimum spend, meaning you could buy a 10 litre bucket for £1 and qualify for a free MOT.
