Every year, thousands of people get their badge, sign up with an operator or an app, and start driving. Most of them are self-employed from day one, and most of them do not realise that HMRC expects to hear from them within months, not years. If you started driving between 6 April 2025 and 5 April 2026, your deadline to register for Self Assessment is 5 October 2026. This guide covers who needs to register, how the deadline works, what happens next, and the records worth keeping from your very first shift. It is general information rather than advice on your own circumstances.
Who needs to register
If you drive as a self-employed private hire or taxi driver, HMRC treats your driving as a business, and business income is reported through Self Assessment.
The key figure is £1,000. HMRC's trading allowance means that if your total self-employed income in a tax year is £1,000 or less, you generally do not need to tell HMRC about it. Above £1,000, you need to register for Self Assessment by 5 October after the end of that tax year.
Two points catch new drivers out:
It is based on income, not profit. The £1,000 is measured on what you take in before any expenses, so a driver who made very little profit after fuel and insurance may still be well over it.
All your self-employed income counts together. Work through more than one app or operator is added up, not treated separately.
If you already complete a Self Assessment return every year, for example because you have other self-employed work, you do not need to register again. Your driving income simply needs to go on your return.
How the 5 October deadline works
The UK tax year runs from 6 April to 5 April. HMRC's rule is that you must tell them by 5 October if you need to complete a tax return for the previous tax year.
So for a new driver, the timeline looks like this:
6 April 2025 to 5 April 2026: you start driving during the 2025 to 2026 tax year.
5 October 2026: deadline to register for Self Assessment.
31 October 2026: deadline for a paper tax return.
31 January 2027: deadline for an online tax return, and to pay the tax you owe.
Many drivers get caught by payments on account. If your tax bill is over £1,000, and less than 80% of your tax was already collected at source, HMRC normally asks for two advance payments towards the following year. These are due on 31 January and 31 July, each usually half of the previous year's bill.
For someone filing for the first time, that can mean paying a full year's tax and the first payment on account on the same January day. It is far easier to plan for if you know it is coming, which is one of the best reasons to register early rather than on 4 October.
How to register
Registration is done online through gov.uk. You sign in with a Government Gateway user ID, and if you do not have one, you can create one during the process.
Once you are registered, HMRC sends your Unique Taxpayer Reference (UTR) by post. You need it to file your return, and because it comes in the post rather than instantly, do not leave registration until the last week.
Keep the letter somewhere safe. Your UTR stays the same from year to year.
What happens if you miss the deadline
Register as soon as you realise. Late registration does not wipe out the obligation, and the longer it is left, the harder it becomes to put right.
HMRC's guidance is that if you register after 5 October and do not pay your full bill by 31 January, you may be charged a penalty for failing to notify, based on the tax still owed. Coming forward yourself, before HMRC gets in touch, is treated very differently from being found.
It is also worth knowing that HMRC may already have information about your income. Since 1 January 2024, digital platforms have had to report details of what people earn through them, and gov.uk lists driving a taxi among the services covered. The first reports reached HMRC by 31 January 2025. If you drive through an app, you should assume HMRC can see those earnings.
If you have missed the deadline, or you have been driving for more than a year without registering, talk to us before HMRC writes to you. Our HMRC compliance work covers exactly this.
Records to keep from day one
The records you keep now decide how easy your first return is, and how well you can answer questions later if HMRC ever asks. Keep:
All income. App and platform statements, operator statements, and a record of any cash fares.
Receipts for business costs. Fuel, servicing and repairs, insurance, vehicle costs, phone costs and the other expenses of running your car as a business.
Mileage records. Business and personal miles, kept as you go rather than reconstructed later.
Bank statements. A separate account for your driving makes everything simpler.
Our guide to tax-deductible expenses for taxi drivers covers what you can claim, and our Self Assessment guide for taxi drivers walks through filing the return itself.
Making Tax Digital is coming for more drivers
Making Tax Digital for Income Tax began on 6 April 2026 for self-employed people with qualifying income over £50,000. The threshold drops to £30,000 from 6 April 2027 and £20,000 from 6 April 2028. Anyone who comes into scope has to keep digital records and send HMRC updates during the year using compatible software.
Qualifying income means turnover, the amount before expenses, not profit. A full-time driver's gross takings can reach those thresholds sooner than their profit suggests, so it is worth checking where you stand before each April. Our guide to Uber, Bolt and private hire driver tax explains how this applies to app drivers.
Tax and your licence
Tax and licensing are linked. When you renew your licence, the council will ask for a tax check code, which shows you are registered with HMRC. Getting your Self Assessment registration right now makes that step straightforward. Our guide to the HMRC tax check code explains how it works.
How Taxi Law can help
We work with taxi and private hire drivers and operators on HMRC compliance, from getting registered properly to dealing with HMRC enquiries and investigations. If you are unsure whether you should have registered, or you have received a letter from HMRC, get in touch before you reply.