Analysis of nearly one million UK quotes reveals the single best day to buy — and why renewal day is the most expensive.
Affiliate disclosure: Some links in this guide earn us commission. This does not affect our editorial content. Read our editorial policy.
Car insurance pricing is not static. The same driver, same car, same comparison site returns meaningfully different quotes depending on when you ask. This is a deliberate feature of how insurers price risk, and understanding it is one of the most reliable ways to reduce your premium without changing anything else about your policy.
MoneySavingExpert’s analysis of close to one million quotes on MoneySuperMarket (November 2025 to January 2026) found that buying 21 to 26 days before your renewal date returns the cheapest quotes. The single cheapest day was 25 days before renewal.
The difference is not marginal. Compared to buying on renewal day, buying 25 days ahead saves an average of £346. That is a 30–40% reduction for many drivers — achieved by doing nothing other than starting the comparison a few weeks earlier than usual.
Insurers use timing as a risk signal. A driver who starts shopping weeks ahead of renewal is statistically associated with lower risk than one who buys at the last minute. Insurers price this into their algorithms. There is also a competitive dynamic: quotes from multiple insurers early in the window are more likely to compete aggressively for your business.
Buying too early — more than 30 days out — slightly increases quotes again, likely because fewer insurers provide firm quotes that far in advance. The 21–26 day window is the sweet spot.
Source: MoneySavingExpert analysis of MoneySuperMarket data, November 2025–January 2026. Figures are averages — your saving will depend on your individual profile.
Affiliate links — Solid Insure AI earns commission if you purchase.