Money and renewals
How to lower car insurance: the best time to buy before renewal
How to lower car insurance at renewal: quotes tend to be lowest three to four weeks before the start date. Why timing matters and what it can't change.
If you're working out how to lower car insurance at renewal, timing is one of the simplest things you control: research reported by Which? in August 2025 found quotes were lowest about 26 days before the policy start date and highest on the start day itself. In other words, in that research the lower prices came about three to four weeks before the renewal date, while the current policy still had time to run.
Timing is not the whole story, though. It can change the price you're quoted, but it never changes what a policy covers, and it won't help if the details you give are wrong. Below is what the timing research shows, how the renewal pricing rules work, and what to think about if you have a claim or conviction on your record.
When is the best time to buy car insurance?
The research Which? reported looked at comprehensive policies paid annually and bought between April and June 2025, using quotes from up to 30 days before the start date. Average prices were higher the closer to the start date the policy was bought. Only a small share of drivers bought on the day with the lowest average price.
Which? suggests setting a reminder about 30 days before your policy ends so there's time to compare. You don't pay for two policies at once by doing this. You buy the new one now and set its start date to the day your current cover ends.
A few points worth keeping in mind:
- These figures are averages across many drivers. Your own quotes can move differently.
- The research measured what people paid, not what they were covered for. A lower figure might come with a higher excess or fewer extras.
- Buying a month early is a timing choice, not a shortcut around the questions insurers ask.
Why are quotes cheaper a few weeks before renewal?
Neither the research nor the regulator explains why. Insurers set their own prices from their own data and don't publish the reasons behind each factor, so any explanation you read is a guess unless it comes from the insurer itself. What the research does show is a pattern: the same kind of policy tended to cost more the closer to the start date it was bought.
What is clear is the practical effect. Leaving it to the last day or two cuts your options, and if your current policy runs out before you've sorted new cover, you're uninsured. GOV.UK says the police can give a £300 fixed penalty and 6 penalty points for driving without insurance, a court can impose an unlimited fine and a ban, and the vehicle can be seized.
Should you stay with your insurer or switch?
Since 1 January 2022, FCA rules have banned "price walking" in home and motor insurance. Under ICOBS 6B.2, an insurer must not set a renewal price higher than the equivalent new business price: what it would charge a new customer with the same risk, coming through the same channel you originally used. FCA guidance says firms should treat each intermediary chain, price comparison website or partnership scheme they sell through as a separate channel.
That doesn't mean your renewal price can't rise. The rules require insurers to take account of risk information picked up during your policy, and overall prices can move for everyone. The FCA said when it confirmed the rules that consumers can still benefit from shopping around or negotiating with their current provider. The difference is that you shouldn't be charged more just for being loyal.
| Option | What the rules mean for price | What to check |
|---|---|---|
| Let it auto-renew | Price can't be above the new customer price for your channel | Read the renewal notice: cover, excess and any changes |
| Renew after asking your insurer | Same cap applies; the insurer may still offer a different figure | Whether anything in the cover has changed to reach that price |
| Switch to a new insurer | Priced as new business by that insurer | Like-for-like cover, excess, add-ons and start date |
The same FCA package introduced rules giving most consumers easier ways to cancel auto-renewal. If you decide to switch, have the new policy confirmed before you stop the old one.
When should you renew if a claim or conviction is involved?
This is where timing gets mixed up with disclosure, and the two need to be kept apart.
Under the Consumer Insurance (Disclosure and Representations) Act 2012, you have a duty to take reasonable care not to make a misrepresentation when a policy is taken out or changed. In plain terms, you answer the insurer's questions accurately on the day you answer them. Choosing when to buy is fine. Giving answers that don't match your situation is not.
Endorsements and points
GOV.UK sets out how long endorsements stay on a driving record. Most stay for 4 years from the date of the offence. Some, such as most drink-driving codes, stay for 11 years from the date of conviction. Insurers ask about convictions over a period they choose, so read the exact wording of each question. If an old conviction falls outside the period the question asks about, you answer the question as written. If it's inside, you declare it.
A pending prosecution or a recent claim
If you know a conviction or an at-fault claim is coming, the honest position is the same: declare what each question asks for at the time you're asked. Policies also usually require you to tell the insurer about certain changes during the policy, so check your policy wording. Timing your purchase around an outcome doesn't remove a duty to tell the insurer.
There's more on how convictions affect premiums in Car insurance for convicted drivers: what sets the price.
How to lower car insurance without changing your cover
People searching how to get cheap car insurance, or simply cheaper car insurance, often end up comparing prices for quite different policies. Timing changes the price; it doesn't change the cover. So the first step is making sure you're comparing the same thing.
- Set a reminder about a month before renewal. Which? suggests around 30 days, which covers the three-to-four-week window and time to read your renewal notice properly.
- Note what you have now. Cover level, compulsory and voluntary excess, named drivers, add-ons such as legal expenses or a courtesy car, and how you pay.
- Check your details are accurate. Which? points out that mileage and where the car is kept overnight affect the price, and suggests working out real mileage from your last two MOT certificates. Your job title must describe what you actually do.
- Get quotes on the same basis. Same cover level, similar excess and the add-ons you actually want, so the figures can be compared fairly.
- Look at the payment method. Which? found some insurers charging over 30% APR on monthly payments, so check the total cost of paying monthly against paying annually.
- Confirm the start date. Match it to the day your current policy ends so there's no gap and no overlap.
If you're looking at how to reduce car insurance further, some options change the risk or the deal itself, such as adding an experienced named driver, choosing a higher voluntary excess or taking a telematics policy. Some carry real risks if done wrongly: naming someone else as the main driver when you are, known as fronting, can invalidate a policy. There's more on doing this safely in How to reduce car insurance without invalidating your policy.
What if your renewal date is days away?
You can still get quotes and buy cover today; you'll just have less choice of timing. The priority is having valid insurance in place when the current policy ends, because driving without it carries the penalties GOV.UK lists. If you're short on time, read the renewal notice your insurer sent, check the cover and excess still suit you, and then decide whether to renew or switch.