Where these numbers come from
The bands and ranges above are the Sentencing Council’s official speeding guideline, in force since 2017 and still current. A court starts from these ranges and adjusts for your circumstances, so this tool shows the framework, not a prediction of your exact fine.
| Limit | Band A | Band B | Band C |
|---|---|---|---|
| 20 mph | 21–30 | 31–40 | 41+ |
| 30 mph | 31–40 | 41–50 | 51+ |
| 40 mph | 41–55 | 56–65 | 66+ |
| 50 mph | 51–65 | 66–75 | 76+ |
| 60 mph | 61–80 | 81–90 | 91+ |
| 70 mph | 71–90 | 91–100 | 101+ |
Fixed penalty, speed awareness course, or court
Only Band A can be dealt with by a fixed penalty: a flat £100 fine and 3 points, set by gov.uk, not a percentage of anything. If you have not been on a speed awareness course in the past 3 years, the police may offer one instead of points, entirely at their discretion. There is no published gov.uk formula for exactly which Band A cases qualify.
Band B and Band C normally mean a court summons, because the points or disqualification on offer go beyond what a fixed penalty can carry. In court, the fine is based on your take home pay: Band B starts at a week’s income, Band C at one and a half week’s income, within the ranges shown below. Every band is capped at £1,000, or £2,500 on a motorway, regardless of income.
| Band | Fine (of weekly income) | Points or ban |
|---|---|---|
| A | 25–75%, starting at 50% | 3 points |
| B | 75–125%, starting at 100% | 4–6 points, or disqualified 7–28 days |
| C | 125–175%, starting at 150% | 6 points, or disqualified 7–56 days |
Two thresholds worth knowing: get to 12 points within 3 years and you face a “totting up” ban regardless of band. If you passed your test in the last 2 years, your licence is revoked automatically at just 6 points.
A note on the “10% plus 2mph” rule
You may see a table online claiming an exact mph threshold for a course or fixed penalty (roughly the limit plus 10% plus 2mph) versus a court summons (roughly the limit plus 10% plus 9mph). This traces to 2013 police guidance that is no longer published by any official body, so we have not put it in the calculator above as if it were current gov.uk policy. In practice many forces still use something close to it, which is why two people just over the same threshold can get different outcomes: it is operational police discretion, not statutory law.
This calculator explains the official guideline. It is not legal advice, does not predict your actual sentence, and a court or the police can depart from these ranges. If your case is heading to court, speak to a motoring solicitor, many offer a free initial call.