Car insurance premiums in the UK have increased by 58% in the past year, with the average policy now costing £995. But only 15% of drivers compare quotes before renewing — meaning most people are massively overpaying. Here's exactly how to find the cheapest car insurance.
How Much Can You Save by Comparing?
| Action | Average Savings | Time Required |
|---|---|---|
| Auto-renew (do nothing) | £0 — you overpay! | 0 minutes |
| Ask for renewal discount | £50–100 | 10 minutes |
| Compare 3–5 providers | £150–250 | 15 minutes |
| Compare 10+ providers | £300–500 | 20 minutes |
Step 1: Time Your Purchase Right
When you buy car insurance matters enormously. Buy 21-28 days before your renewal date for the cheapest quotes:
| Days Before Renewal | Average Premium | vs Best Price |
|---|---|---|
| 30+ days before | £895 | +£100 (too early) |
| 21–28 days before | £795 ← Sweet Spot! | Best price |
| 7–14 days before | £920 | +£125 |
| 1–6 days before | £995+ | +£200 (last-minute penalty) |
Step 2: Best Comparison Sites to Use
- Compare the Market — Access to 130+ insurers, most popular
- GoCompare — Often finds exclusive deals not on other sites
- Confused.com — Great for multi-car policies
- MoneySuperMarket — Good price tracking tools
Pro tip: Use multiple comparison sites! Not all insurers appear on every site. Checking 2-3 sites takes 5 extra minutes but could save you £100+. Also check Churchill and Direct Line directly — they don't appear on comparison sites.
Step 3: Optimise Your Policy Details
- Annual mileage: Be accurate. 8,000 vs 10,000 miles = £80 difference. Track your odometer.
- Voluntary excess: Increasing from £100 to £250 saves £75–150/year (only if you can afford to pay it in a claim).
- Parking location: Driveway saves £50–100 vs street. Garage saves £100–200.
- Dashcam discount: £25–50 savings with many insurers. Declare it!
- Job title: 'Chef' vs 'Caterer' can differ by £100. Use the most accurate description.
Cheap Car Insurance for Young Drivers
Under 25? Average premium is £1,897. Here's how to reduce this significantly:
- Telematics (Black Box) Insurance — Safe drivers get 20-30% discount after 3-6 months. Best providers: Marmalade, Young Marmalade, Admiral LittleBox.
- Named driver on parent's policy — Can cut costs by 50%, but must be genuine (fronting is illegal).
- Pass Plus course — £150-200 course saves £200-300 on premiums. Net saving of £50-150.
- Higher voluntary excess — Raising to £500-1,000 significantly cuts young driver premiums.
- Car choice matters — Group 1-10 cars are cheapest. Avoid modifications.
How to Switch Car Insurance Mid-Policy
- 1Check your cancellation fee (usually £25-50 + pro-rata refund)
- 2Get new quotes and calculate if saving outweighs cancellation cost
- 3Check if new insurer charges a policy setup fee
- 4Cancel old policy in writing, confirm refund amount
- 5Start new policy immediately — never have a gap in cover
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Sento earns a referral if you click through our links — this never affects our recommendations. Prices and details correct at time of publication. Updated February 2026.