Drink Driving Penalty Calculator

How Is a Drink Driving Sentence Calculated?

When a court sentences someone for drink driving in the UK, the penalty is not a fixed amount. The sentence is calculated based on a combination of the type of offence, the level of alcohol detected in your system, and any aggravating or mitigating factors present in your case.

For the most common offence — driving or attempting to drive with excess alcohol under Section 5(1)(a) of the Road Traffic Act 1988 — the court starts by looking at your breath or blood alcohol reading and placing it within a sentencing band. The higher your reading, the more severe the starting point for your sentence.

From there, the court adjusts the sentence up or down depending on whether there are factors that make the offence more serious (aggravating factors) or less serious (mitigating factors). Our drink driving sentence calculator above follows this same process to give you an indicative estimate.

A conviction will typically result in a DR10 endorsement on your driving licence, which stays on your record for 11 years. This has significant implications for your car insurance as a convicted driver and your ability to drive professionally.

UK Drink Driving Sentencing Guidelines

The Sentencing Council for England and Wales sets out sentencing bands based on your alcohol reading. The table below shows the broad starting points for a standard excess alcohol offence:

For a full breakdown of what a drink driving conviction means for your licence, insurance, and record, see our detailed DR10 drink driving conviction guide. You can also check how penalty points affect your insurance or use our speeding fine calculator for comparison.

What Affects Your Drink Driving Penalty?

Beyond your alcohol reading and the type of offence, courts consider a range of aggravating and mitigating factors when deciding your sentence. These can significantly push your penalty up or down from the starting point.

After Your Conviction: What Happens Next?

A drink driving conviction doesn’t end when you leave the courtroom. There are several practical consequences you’ll need to deal with:

Driving ban: You will be disqualified from driving for a minimum of 12 months (3 years for a second offence within 10 years). You cannot drive during this period under any circumstances.

Criminal record: A drink driving conviction results in a criminal record. The endorsement (typically a DR10 conviction code) stays on your driving licence for 11 years from the date of conviction, although it is considered “spent” for most purposes after 5 years. You should also be aware that a disqualification stays on your record and must be declared to insurers.

DVLA medical: If your alcohol reading was particularly high (2.5 times the legal limit or more), or if you have two drink driving convictions within 10 years, the DVLA will classify you as a “High Risk Offender.” You will be required to pass a DVLA medical assessment including a CDT blood test before your licence is returned.

Insurance: Your car insurance premiums will increase significantly after a drink driving conviction. Many standard insurers will refuse to cover you, and you’ll need to use a specialist convicted driver insurer. Find out how much car insurance costs after a drink driving ban — premiums typically remain elevated for 5 years after the conviction. If you also have penalty points on your licence, expect even higher quotes. Even 3 penalty points can increase your insurance significantly. Van drivers should look at convicted driver van insurance options.

Drug driving: If your offence involved drugs rather than alcohol, the conviction codes and insurance implications are different. Read our guide to drug driving insurance (DG10, DR80, DR90) for more information.

Employment: A drink driving conviction can affect certain jobs, particularly those that require driving, security clearance, or professional registration. If you drive for work, including deliveries, make sure you understand the implications of driving without the correct insurance.

Other driving offences: If you’re also facing a fine for driving without insurance or want to know how to challenge a speeding ticket, we cover those topics in detail too.