If you have missed a Self Assessment deadline, check the tax year and the task that is overdue, then deal with it now. Registering, submitting a return and paying the bill are separate steps. A late return may still need filing even if you cannot afford the tax. Keep any HMRC notice beside you as you work through the decisions below.
This guide covers recovery after a missed deadline. For the wider filing process, use our Self Assessment guide for Uber and private hire drivers. The annual-return penalty figures below concern the existing regime, including 2025/26 returns; the MTD section explains the distinction for drivers who joined in April 2026.
Start here: identify the overdue task
Open your HMRC account through GOV.UK and compare it with your letters. Note the tax year, notice date, filing date and payment date. Work down this decision flow: more than one answer can be yes, so continue after each action.
Has HMRC sent a penalty notice?
Yes: Save it and note the appeal deadline. Check the reason and tax year, then continue below to resolve any missing return or payment.
No: Check your account for outstanding returns and balances; continue below.
Do you need Self Assessment but have not registered or reactivated it?
Yes: Use the registration route for your circumstances, then read the filing date HMRC gives you. Check payment separately. Continue below.
No: Continue to the return check.
Does HMRC require a return that you have not submitted?
Yes: Gather the records and file as soon as you can. If you believe no return is needed, ask HMRC to withdraw the requirement and keep its reply. Continue below.
No: Keep your submission receipt and continue to the payment check.
Is an amount overdue for payment?
Yes: Check the balance and pay what you can. Contact HMRC about an affordable payment arrangement if you cannot clear it.
No: Keep evidence of payment, then review any penalty or disputed notice still outstanding.
If the letter is about a VAT return, an enquiry or an MTD quarterly update, follow that obligation’s rules. Do not assume the annual Self Assessment penalties apply to every HMRC letter.
Missed registration: check the notice before assuming you filed late
For the 2025/26 tax year, the usual first-time notification deadline was 5 October 2026. Missing that date does not mean that the usual online return deadline, 31 January 2027, has already passed. HMRC says that registering after 5 October 2026 leads to a filing deadline three months from the date on its letter or email. The tax payment date remains 31 January 2027. Check HMRC’s deadline guidance and your own notice.
Register now if you should have done so. A failure-to-notify penalty can arise where late registration leaves tax unpaid at the relevant payment date; it is a different issue from a late-filing penalty. Our driver registration guide explains what to check if you already have a UTR or drive alongside PAYE work.
Missed filing: complete the return and retain the receipt
Gather platform statements, fee invoices, bank records and the evidence for your expense claims. Include other taxable income for the same year. Our Self Assessment document checklist helps you identify the gaps without rebuilding the whole filing process here.
A calculation saved in software is not proof that HMRC received the return. Check the submission acknowledgement and the tax year it covers. If an accountant handles filing, ask for that confirmation and agree who will resolve any rejected submission.
Where final profit figures are unavailable, HMRC provides a route for using provisional figures. Explain their use on the return and amend it once the final figures are available. Keep the calculation and supporting evidence; do not enter an invented expense or hide an estimate as a confirmed amount. Missing records or several overdue years may need individual advice on the correct filing route.
If you believe HMRC should not require a return, contact it to ask about withdrawing the notice. Do not leave the notice unanswered because your profit was low or you stopped driving. HMRC’s Self Assessment penalty appeal guidance also covers asking to cancel a penalty where no return is needed.
Check which penalty you have received
Under the existing annual-return rules, HMRC can charge an initial £100 late-filing penalty even when no tax is payable. Further charges depend on how long the return remains outstanding. Use the notice and HMRC’s penalty guidance to check the charge; the table is not a calculation for your individual case.
| Delay in filing under the existing regime | Standard late-filing charge |
|---|---|
| Initial late return | £100 |
| More than three months | £10 a day for up to 90 days, in addition to the initial charge |
| Six months | A further £300 or 5% of tax due, whichever is higher |
| Twelve months | A further £300 or 5% of tax due, whichever is higher; higher penalties can apply in serious cases |
Late payment has separate charges: under the existing regime, 5% penalties can apply to tax remaining unpaid at 30 days, six months and twelve months. Interest also runs on overdue tax. Check the type of balance: a payment on account, balancing payment and penalty are different entries. Our payments on account explanation helps you read a January or July demand.
Cannot pay: address the balance while you finish filing
Do not wait until you have saved the full bill before dealing with an overdue return. Confirm what you owe and contact HMRC about paying in instalments. HMRC will assess whether a payment plan is appropriate; acceptance is not automatic.
Have your tax reference, income, essential spending and other tax debts ready. Use a monthly amount you can sustain through quieter driving weeks. Keep the arrangement and payment references, and check how interest and penalties apply to your case. This first contact is separate from disputing a penalty.
Appeal a penalty with dates and evidence
HMRC says you usually have 30 days from the date it issued the penalty to contact it or appeal. Follow the notice and official appeal instructions; if your appeal is late, explain that delay too. Keep a copy and proof of submission.
Explain what prevented you meeting the obligation, when it began, when you could act again and what you did then. An unexpected hospital stay or an HMRC service failure may be relevant, depending on the facts. Compare your circumstances with HMRC’s reasonable-excuse guidance. A difficult week of driving does not establish an excuse by itself, and no adviser can promise that HMRC will accept an appeal.
Continue resolving the missing return or payment while HMRC considers the appeal. HMRC advises considering payment of the disputed penalty: if an appeal fails, interest can run from its due date. If you disagree with the outcome, read the decision letter for the review or further appeal route and its deadline.
MTD drivers: keep the annual return and quarterly updates separate
Drivers required to join Making Tax Digital for Income Tax from 6 April 2026 still use the existing penalties for their 2025/26 return due on 31 January 2027. The new penalty regime starts with the tax year in which they join MTD. HMRC states that missed quarterly-update deadlines for 2026/27 carry no late-submission penalties, but drivers must still keep digital records and send those updates before completing their tax return.
That relief does not erase an older late annual return, unpaid tax or a requirement to keep records. Check HMRC’s MTD penalty guidance and our MTD guide for drivers if your letter concerns quarterly reporting. Volunteers have separate guidance linked from the HMRC page.
Fictional example: a driver finds two different problems
On 12 October 2026, Alex opens a penalty letter about an unfiled 2024/25 return. Alex also has records ready for 2025/26 and assumes the upcoming January deadline covers both years. It does not: each year needs its own check against HMRC’s notice.
Alex records the penalty’s issue date and appeal deadline, gathers the missing 2024/25 statements and agrees a filing date with the accountant. Alex checks the overdue balance and contacts HMRC about payment separately. The 2025/26 return stays on a separate task list. This illustrates how to organise the work; it does not predict a penalty amount or a successful appeal.
Before you close the paperwork
- Write down the tax year, overdue task and next action for each notice.
- Save the return acknowledgement, payment reference or HMRC correspondence that confirms what you have done.
- Record unresolved questions and the person responsible for answering each one.
- Set reminders for the next filing, payment and appeal dates rather than relying on the next letter.
For help reviewing a notice and organising a response, ask about HMRC compliance support. Include the tax year and response deadline in your enquiry; share sensitive documents securely once arrangements are agreed. If you are changing advisers during the recovery work, use the accountant handover checklist to agree who owns the outstanding return.
Official sources checked 12 October 2026. This guide covers UK sole-trader Self Assessment recovery; the appropriate action depends on the tax year, notice and individual circumstances.
Back to all articles