Read our latest expert guide to self assessment tax returns for UK landlords in 2026 and how the rules are changing for property owners. Our Property Tax Hub experts explain what landlords responsibilities are, deadlines, and potential help for tax payments.
How do Landlords Self Assessment Tax Returns work and what do I need?
When you start letting out a property in the UK, you must register for self-assessment to report your rental profits to HMRC on time and pay income tax. Also, where relevant, payments on account should be paid to HMRC by specific deadlines. Miss these deadlines and you risk automatic penalties and interest charges which can erode your profits, even if the tax payment due is small. For existing landlords, you may also have additional requirements, and there are arrangements that can be made for landlords who are struggling to pay their tax. Unforeseen circumstances such as property damage, tenant payment problems, or unplanned works can all cause major financial issues to landlords.
Do landlords need to register for self assessment?
You must register for self-assessment if you have taxable income that is not fully taxed at source, such as rental profits over your property allowance or side income from self-employment, and HMRC is not already collecting the tax through PAYE. Landlords generally fall into this category and should report their income from rentals via a self-assessment.
When do landlords have to tell HMRC about rental income?
You must tell HMRC about new untaxed income by 5th October following the end of the tax year in which you first receive it, usually by using form SA1 or registering for self-assessment online.
When are self-assessment tax returns and payments due for landlords?
Paper returns must reach HMRC by 31st October and online returns by 31st January after the end of the tax year, with any balancing tax and the first payment on account, if due, also payable by 31st January. Landlords should make sure that they plan properly for tax payments that are due to be paid to HMRC
What happens if you miss the deadline?
If you file late or pay late, HMRC charges automatic penalties and interest that can quickly build up, so it is usually best to file on time and then arrange a payment plan if you cannot pay everything straight away.
Key Points: How do self assessment tax returns work for UK landlords 2026?
- You must notify HMRC of rental income by 5 October after the tax year in which it starts.
- Paper tax returns are normally due by 31 October and online returns by 31 January.
- Tax is due by 31 January, with possible additional payments on account on 31 January and 31 July.
- If the self assessment bill is £3,000 or less and you are employed, some or all of it may be collected through your PAYE code.
- Late filing and late payment attract fixed penalties, daily penalties, percentage penalties and interest.
- From 6 April 2026, many landlords will have to keep digital records and report quarterly under Making Tax Digital for Income Tax.
- Non UK residents selling UK property must report and pay any capital gains tax within 60 days of completion.
This simple guide looks at the key responsibilities for UK landlords in 2026 and explains in basic language how to avoid unnecessary fees and charges. The example below looks at a UK property landlord to illustrate the main points to look out for.
Introducing Mark – a landlord self-assessment example
To bring the rules to life, it helps to walk through a realistic example. Mark begins letting a property in September 2022, charging annual rent of £15,000. Her allowable expenses, such as repairs, letting agent fees and insurance, come to £3,000 per year. That leaves rental profits of £12,000 a year. Mark already has other income that uses up her personal allowance and basic rate band, so all of her rental profits are taxed at the higher rate of 40 per cent. Up to this point she has never completed a self-assessment tax return.
Because the property was first let in September 2022, Mark has rental profits in the 2022/23 tax year, which runs from 6 April 2022 to 5 April 2023. From that moment, her responsibilities under self-assessment begin.
Mark’s responsibilities and key self-assessment deadlines
New landlords often assume that HMRC will somehow automatically know they have rental income. Unfortunately, they do not. It is your legal responsibility to tell HMRC that you have untaxed income that may give rise to a tax bill. For Mark, the timetable looks like this for the 2022/23 tax year.
Notify HMRC by 5 October
Mark’s first rental profits arise in 2022/23, so she must notify HMRC that she needs a tax return by 5 October 2023. This is six months after the end of the tax year. She can do this by completing form SA1 or by registering for self-assessment using HMRC’s online service. Once registered, HMRC will issue a unique taxpayer reference (UTR) and set her up for tax returns.
Optional paper filing deadline – 31st October
If Mark prefers a paper return and possibly wants HMRC to calculate the tax for her, her 2022/23 paper tax return must reach HMRC by 31 October 2023. If she posts it after this date, she is immediately liable to a £100 late filing penalty, even if she owes no tax or is due a refund.
Optional PAYE coding deadline – 30th December
Where the self-assessment bill is less than £3,000 and the taxpayer is in PAYE employment, there is an option for HMRC to collect the self-assessment tax through the PAYE code for the following tax year. To use this option, Mark must either send a paper return by 31 October 2023 or file online by 30 December 2023. In practice, many advisers recommend not asking HMRC to guess rental income in advance, as this can bring tax forward unnecessarily.
Standard online filing deadline – 31st January
If Mark has not already filed on paper, she must submit her 2022/23 tax return online by 31 January 2024. If she misses this date, the £100 late filing penalty applies. A small number of people, such as certain politically sensitive individuals, are not allowed to file online and can submit a paper return by this 31 January deadline instead.
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How Mark’s rental profits and tax are calculated
Because the property was first let in September 2022, Mark has only part of a year’s profit in 2022/23. From September 2022 to 5 April 2023, she received seven months of rent. Her annual rent is £15,000, so on a simple time basis the 2022/23 rent is £8,750, but for illustration the example assumes rental profits for that first period of £7,000. All of that profit is taxed at 40 per cent, so the tax due for 2022/23 is £2,800.
For 2023/24 the full year’s profit is £12,000. Again, this is all taxed at 40 per cent, so the tax liability is £4,800. Assuming the rental business continues at the same level until at least 5 April 2024, these are her income tax liabilities under self-assessment:
| Tax year | Rental profit | Tax rate | Tax due |
|---|---|---|---|
| 2022/23 | £7,000 | 40% | £2,800 |
| 2023/24 | £12,000 | 40% | £4,800 |
When the self-assessment tax must be paid
Once you know the tax for each year, the next issue is when it is actually due. This depends on whether you are employed, how large the self-assessment bill is and whether you are required to make payments on account.
Where Mark is employed and in PAYE
As an employee, Mark already pays tax under PAYE on her salary. HMRC sometimes try to include estimated rental income in a PAYE code to collect tax earlier than would otherwise be necessary. Advisers often suggest not asking HMRC to estimate rental income in advance, because if they overestimate, cash is taken out of your pay earlier than needed.
For Mark, her 2022/23 self-assessment tax bill is £2,800. If she files her 2022/23 tax return by 30 December 2023 and the bill is no more than £3,000, she can ask for that £2,800 to be coded into her 2024/25 PAYE notice of coding. In other words, it will be collected in instalments via her payslips in the year ending 5 April 2025, rather than being paid as a single lump sum on 31 January 2024.
However, the £4,800 liability for 2023/24 exceeds £3,000, so it cannot be collected through the PAYE code for 2025/26. Instead, that amount is payable directly under self-assessment. This can result in a significant bill falling due in one go, which is why setting money aside for tax is so important.
Where Mark is not employed or her liability is over £3,000
If Mark is not in PAYE, or if her self-assessment bill is more than £3,000, she will pay tax directly through self-assessment. Whether she has to make payments on account depends mainly on the size of her self-assessment bill and how it compares with the total tax for the year.
If the net liability is less than £1,000 or less than 20 per cent of the total tax and Class 4 National Insurance before any tax deducted at source, there are no payments on account. The full amount is simply due on 31 January following the end of the tax year. In that scenario, Mark would pay £2,800 by 31 January 2024 for 2022/23 and £4,800 by 31 January 2025 for 2023/24.
If neither of these conditions is met, Mark must make payments on account for the following tax year. Each payment on account is half of the previous year’s income tax and Class 4 liability, with one half due on 31 January in the tax year and the other half on 31 July.
Payments on account using Mark’s figures
Payments on account often cause confusion because, in the first year, they can feel like paying one and a half year’s tax at once. Using Mark’s liabilities, the time line, assuming no PAYE coding, looks like this:
| Date due | Tax year covered | Tax paid (no PAYE) | Tax paid (2022/23 via PAYE code) |
|---|---|---|---|
| 2022/23 total liability | £2,800 | – | |
| 2023/24 first payment on account (½ × £2,800) | £1,400 | – | |
| 31st January 2024 | Total due on this date | £4,200 | – |
| 2023/24 second payment on account (½ × £2,800) | £1,400 | – | |
| 31st July 2024 | Total due on this date | £1,400 | – |
| 2023/24 balancing payment (£4,800 – £2,800) | £2,000 | £4,800 | |
| 2024/25 first payment on account (½ × £4,800) | £2,400 | £2,400 | |
| 31st January 2025 | Total due on this date | £4,400 | £7,200 |
| 2024/25 second payment on account (½ × £4,800) | £2,400 | £2,400 | |
| 31st July 2025 | Total due on this date | £2,400 | £2,400 |
If the rental profits and tax stay roughly the same, the ongoing payments on account will settle into a rhythm of similar amounts each January and July. If income falls, you can claim to reduce payments on account, although if you reduce them too far and end up underpaying, HMRC will charge interest on the shortfall.
Penalties and interest if you are late
Self-assessment penalties can be surprisingly harsh. Even if the tax due is quite small, the fines for late filing and late payment can mount up quickly. The broad structure is as follows.
- Miss the filing deadline and there is an automatic £100 penalty that is not refunded simply because no tax is due.
- After three months, HMRC adds daily penalties of £10 per day, up to a maximum of 90 days.
- If the return is over six months late, there is a further penalty of £300 or 5 per cent of the tax due if this is higher.
- At over twelve months late, a further penalty of £300 or 5 per cent of the tax due again applies, on top of the earlier penalties, and in serious cases penalties can reach 100 per cent of the tax owed.
- Separate penalties of 5 per cent of the unpaid tax are charged if tax is not paid within 30 days of 31 January, again at 31 July and again the following 31 January, along with interest on the outstanding amounts.
The message is clear. Whatever the size of your rental business, it is crucial to file your return on time. If you know the tax will be difficult to pay, it is often wiser to submit a correct return by the deadline, avoid the filing penalties and then talk to HMRC about a time to pay arrangement.
What to do if you cannot pay your self-assessment bill
If you are unable to pay the full amount of tax on time, do not simply ignore the bill. HMRC will usually consider an instalment arrangement, known as a ‘time to pay’ plan, especially if you contact them before the debt becomes seriously overdue. At the time of writing, there is a business payment support service helpline on 0300 200 3835. It is also possible in many cases to set up a payment plan online through your Government Gateway account for smaller self-assessment debts.
Records, Making Tax Digital and quarterly reporting
All landlords are already required to keep adequate records of their income and expenses, such as tenancy agreements, rental statements, invoices and receipts. These records support the figures on the tax return and must be retained for a number of years in case HMRC asks to see them.
From 6 April 2026, Making Tax Digital for Income Tax will apply to individuals with gross rental income above £50,000 a year. From April 2027 it will extend to those with gross rental income above £30,000. These landlords will have to keep digital records and submit quarterly updates of income and expenses to HMRC within one month of the end of each quarter. Despite the move to quarterly reporting, HMRC has stated that the existing half-yearly payment dates, 31 January and 31 July, will remain unchanged.
While those thresholds may sound high, remember that they apply to gross rental income, not profit. It can be worth planning ahead by choosing suitable bookkeeping software and getting comfortable with digital record-keeping before you are legally required to do so. More detail on Making Tax Digital can be found on the official Making Tax Digital guidance.
Special rules for non-UK residents selling UK property
Non-UK residents who dispose of UK land or property, whether residential or commercial, must report the disposal and pay any UK capital gains tax due within 60 days of completion. This is done using a UK property capital gains tax return. Because the 60-day deadline is tight, it is often necessary to estimate the tax rate or the final gain and then adjust the figures later through the self-assessment return or by amending the capital gains tax return.
If the 60-day deadline is missed, late filing penalties apply, similar in structure to self-assessment penalties. Non-resident owners, therefore, need to be particularly organised when selling UK property, especially where there are complex issues such as historic improvements, missing records or questions over main residence relief.
Expert summary: Self-assessment rules and responsibilities for UK landlords
Self-assessment for landlords is not just a yearly formality. Using Mark’s example shows how the system affects the timing of your tax bills, the possibility of payments on account and the cash flow impact if liabilities are coded through PAYE or paid directly. The key habits are to register promptly, keep good records, diarise the key dates, file on time and put money aside regularly so that the 31 January and 31 July payments do not come as a shock. With that in place, even higher-rate taxpayers with growing rental portfolios can handle self-assessment calmly instead of dreading the brown envelopes.
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