The phrase "annual accounts and tax returns" covers very different obligations depending on how you hold your property. An individual landlord files a personal Self-Assessment tax return with HMRC. A property company director files statutory accounts with Companies House and a separate corporation tax return with HMRC. These involve different forms, different deadlines, different government bodies, and different penalty regimes.
Getting this distinction right is not a minor technicality. Filing the wrong form, missing the wrong deadline, or misunderstanding which obligation applies to you can result in penalties that compound over time. This guide sets out both tracks on annual accounts and tax returns clearly, explains what each one involves, and helps you understand exactly what you are required to do and by when.
Track 1: Individual Landlords & Self-Assessment
Who This Applies To
If you personally own a rental property, whether a single flat or a growing portfolio, and that property is not held through a limited company, you are taxed as an individual. HMRC collects tax on your rental profits through the Self-Assessment system. This applies to UK residents and non-UK residents alike, though non-residents have some additional obligations discussed briefly below.
What You Must File: SA100 & SA105
The core filing requirement for an individual landlord is the SA100, which is the main Self-Assessment tax return. On its own, the SA100 does not have space for rental income details. That is where the SA105 property supplement comes in. The SA105 is a separate page within the Self-Assessment return that captures rental income, allowable expenses, and the resulting net profit or loss from UK property.
On the SA105, you must declare your gross rental income, that is the full rent received before expenses. You then deduct allowable expenses, which can include mortgage interest (subject to the restriction now in force for residential landlords), letting agent fees, repairs and maintenance, insurance, and other legitimate costs of running the let property. The resulting figure is your taxable rental profit, which feeds into your overall Self-Assessment calculation.
Note
If you have overseas rental income, a separate section (the SA106 foreign supplement) applies in addition to the SA105.
What Counts As a Deductible Expense
Individual landlords can claim costs that are wholly and exclusively incurred in letting the property. This includes property management fees, ground rent and service charges where you pay them as landlord, building and contents insurance for the let property, costs of repairs and maintenance (not improvements), accountancy fees related to the property, and certain travel costs.
Mortgage interest is handled differently. Since April 2020, individual landlords renting residential property cannot deduct mortgage interest directly from their rental income. Instead, they receive a 20 per cent tax credit based on the finance costs, which provides less relief for higher and additional rate taxpayers.
Capital improvements, such as an extension, are not deductible as revenue expenses against rental income. But replacement works are not always capital, and some may count as repairs depending on the facts. Capital expenditure may instead be relevant when calculating any gain if you later sell the property.
Self-Assessment Filing Deadlines
The deadline for filing a Self-Assessment tax return online is 31 January following the end of the tax year. The UK tax year runs from 6 April to 5 April, so for the 2024 to 2025 tax year (ending 5 April 2025), the online filing deadline is 31 January 2026.
Paper returns have an earlier deadline of 31 October, but the vast majority of landlords file online.
If you are a new landlord who has not previously filed a Self-Assessment return, you must register with HMRC by 5 October following the end of the tax year in which you first received rental income. For example, if you first let a property during the 2024 to 2025 tax year, you should have registered by 5 October 2025.
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Tax Payment Deadlines
Filing and payment are separate steps. Under Self-Assessment, you generally pay: Any tax owed for the previous year by 31 January. This is the balancing payment. You also make a first payment on account for the current year on 31 January, and a second payment on account on 31 July. Payments on account are each equal to half of the previous year's tax bill and apply once your tax liability exceeds a certain threshold.
Missing a Self-Assessment payment deadline can lead to late-payment interest and late-payment penalties of 5% of the unpaid tax at 30 days, 6 months, and 12 months late.
Making Tax Digital for Income Tax: A Major Change from April 2026
The way individual landlords report their income to HMRC is changing. Making Tax Digital for Income Tax (MTD for IT) is now live for the first group of affected taxpayers.
From 6 April 2026, individual landlords and sole traders with combined gross income from property and self-employment exceeding £50,000 must keep digital records and submit quarterly updates to HMRC using compatible software. This is based on qualifying income from the 2024 to 2025 tax return, meaning HMRC uses your most recently filed return to determine whether you are in scope.
The threshold reduces to £30,000 from April 2027 and further to £20,000 from April 2028.
Quarterly updates do not replace the annual tax return entirely. Instead, taxpayers submit four updates during the year, each summarising income and expenses for that quarter. This is followed by a final declaration in January that confirms the overall tax position. The key point is that quarterly submissions report information to HMRC more frequently, but they do not change when tax is due. Payment deadlines remain the same.
MTD for Income Tax currently applies to individuals with qualifying self-employment and/or property income. The official current guidance does not mandate MTD for Corporation Tax. Separate Company Tax Return filing rules apply instead.
Non-Resident Landlords
If you are not resident in the UK for tax purposes but own UK rental property, you still have reporting obligations. Non-resident landlords must either register with the Non-Resident Landlord Scheme to receive rents without tax being deducted at source or have their letting agent or tenant withhold basic rate tax. You are still required to file a UK Self-Assessment tax return to report your rental income and claim any reliefs or deductions.
Track 2: Property Company Directors: Statutory Accounts & Corporation Tax
Who This Applies To
If your rental or development property is held inside a UK limited company, the company is treated as a separate legal entity. It pays corporation tax on its profits, not income tax. The company must file its own annual accounts and its own tax return. As a director, you are responsible for ensuring those filings are made on time, even if you are not personally completing them.
What a Property Company Must File Each Year
A limited company has three main annual obligations, each with its own deadline and its own filing destination.
- Statutory Accounts (Annual Accounts)
Statutory Accounts must be filed with Companies House each year. They show the company’s financial position and are a legal requirement for all limited companies. - Corporation Tax Return (CT600)
Corporation Tax Return must be filed with HMRC every year. It reports the company’s profits, losses, and the corporation tax that may be due. - Confirmation Statement
Confirmation Statement must also be filed with Companies House annually. It confirms that the company’s details, such as directors, shareholders, and registered office, are correct and up to date.
All three are compulsory, and missing any of them can result in penalties or, in the case of the confirmation statement, a company being struck off.
Statutory Accounts Filed with Companies House
Every UK limited company must prepare annual accounts showing its financial position, including properties held, liabilities, income, costs, and profit or loss for the year. Private company accounts must be delivered to Companies House within nine months of the accounting period end. Smaller companies, including most buy-to-let companies, may qualify to file abridged or micro-entity accounts, which are simpler and disclose less information.
Late filing attracts an automatic penalty: £150 if accounts arrive within one month of the deadline, £375 between one and three months, £750 between three and six months, and £1,500 beyond six months. All penalties double if a company files late in two successive years. Not filing at all is a criminal offence, and directors can be personally fined in addition to any penalty issued against the company.
The CT600 Corporation Tax Return Filed with HMRC
The CT600 (Corporation Tax Return) is used by a company to report its taxable profits and calculate the corporation tax due. For a property company, this includes rental income, profits from property sales, and other income. According to HMRC guidance, the CT600 must be filed within 12 months of the end of the accounting period, and a return is required even if the company makes a loss or has no tax to pay.
A key recent change is the closure of HMRC’s free online filing service (often referred to as the CATO joint filing portal). This service closed on 31 March 2026, and from 1 April 2026 all companies must use commercial software to file their CT600 and submit accounts to HMRC. Returns must still be filed electronically in the required format (including iXBRL tagging for accounts and computations), which is typically handled through approved software or by an accountant.
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How Corporation Tax is Calculated for a Property Company
A property company pays corporation tax on its taxable profits. For a straightforward buy-to-let company, this means rental income after allowable expenses. Unlike individual landlords, limited companies can still deduct mortgage interest in full as a business expense, which is one of the reasons some landlords choose to hold property through a company.
19% small profits rate
Companies with profits of £50,000 or less pay Corporation Tax at the small profits rate of 19%.
25% main rate
Companies with profits over £250,000 pay Corporation Tax at the main rate of 25%.
Marginal relief for profits in between
Companies with profits between £50,000 and £250,000 pay tax at the main rate, but this is reduced by marginal relief, which creates a gradual increase in the effective rate of Corporation Tax.
Thresholds may be reduced
The £50,000 and £250,000 limits are reduced if the accounting period is shorter than 12 months or if the company has associated companies.
Corporation Tax Payment Deadline (UK)
Corporation Tax payment and filing deadlines are separate, and the payment deadline comes first. HMRC requires companies to pay Corporation Tax 9 months and 1 day after the end of the accounting period. For example, if your company’s year ends on 31 March, the payment deadline will be 1 January of the following year.
HMRC charges interest on late payments, which accrues daily from the due date until the tax is paid in full. The interest rate is set by HMRC and can change periodically, so it’s important to check the current rate at the time of payment. Delays due to cash flow issues, such as funds tied up in property purchases or developments, are not accepted as a valid excuse. Proper tax planning is essential, especially for property companies with irregular rental income or ongoing investments.
Some companies must pay Corporation Tax by instalments rather than in a single payment. This generally applies to large companies, broadly where taxable profits for the accounting period are at an annual rate of more than £1.5 million, although the threshold can be reduced where there are associated companies and exceptions can apply.
The Confirmation Statement
The confirmation statement is a separate annual filing that must be sent to Companies House. It is not a set of accounts and does not report the company’s profit or tax position. Instead, it confirms that key information held on the public register is correct and up to date, including the company’s registered office address, directors, shareholders, people with significant control (PSCs), share capital, and registered email address where required. A company must file a confirmation statement even if nothing has changed during the review period.
A company must file at least one confirmation statement every 12 months, and it must be submitted within 14 days of the end of the review period. The review period usually starts on the date of incorporation or the date the last confirmation statement was filed. As of 1 February 2026, the filing fee is £50 online or £110 by post. If a company fails to file its confirmation statement, Companies House may act, including financial penalties and ultimately striking the company off the register.
ATED: Annual Tax on Enveloped Dwellings
Property companies that own UK residential properties valued at over £500,000 have an additional filing obligation. The Annual Tax on Enveloped Dwellings (ATED) is a charge that applies to companies holding high-value residential property. The charge is significant, rising to tens of thousands of pounds annually for properties valued at several million pounds.
However, most buy-to-let companies can claim an ATED relief if the property is let to third parties on a commercial basis. The key point is that you still have to file an ATED return even if you are entitled to full relief and no ATED is payable. ATED returns are filed with HMRC on an annual basis and cover the period from 1 April to 31 March. The return for each period must be filed and any tax paid by 30 April at the start of that period. Failure to file, even where the balance due is nil, can result in penalties.
Annual Accounts and Tax Returns Comparision: Landlord vs Company Director
Usually an SA100 tax return plus SA105 supplementary pages for UK property income. If the landlord has foreign property income or other foreign income/gains, SA106 may also be needed.
File through HMRC Self-Assessment, either online or by paper return.
The usual online filing deadline is 31 January following the end of the tax year on 5 April. If filing by paper, the normal deadline is 31 October.
Missing the Self-Assessment filing deadline normally triggers an automatic £100 penalty, with further penalties if the return remains outstanding at 3, 6 and 12 months.
From 6 April 2026, Making Tax Digital for Income Tax applies to sole traders and landlords whose total annual income from self-employment and property is over £50,000. This requires digital records and quarterly updates using compatible software.
The Director's Personal Self-Assessment Position
Being a director of a property company does not automatically remove your personal tax obligations, but it does not always mean you must file a personal Self-Assessment return either. Salary taken from the company is normally dealt with through PAYE, and HMRC says directors may need to complete Self-Assessment in some circumstances, including where they receive dividends or have other untaxed income in addition to their director’s salary. If HMRC issues a notice to file, you must submit a return even if little or no tax is due.
In practice, many property company directors end up managing two layers of compliance: the company’s own filings, and their personal tax position. If you already complete a tax return, you must include any dividend income on it. If you sell shares in the company, or receive a capital distribution on a winding up, this may create a Capital Gains Tax liability, which is generally reported using the SA108 Capital Gains pages alongside the SA100.
Practical Example: Two Property Owners, Two Different Situations
Two people own the same type of rental flat in Birmingham, but their filing obligations are different depending on ownership structure. If the flat is owned personally, the landlord usually reports the income through Self-Assessment using SA100 and SA105. Rental income is declared, allowable expenses are deducted, and mortgage interest is dealt with separately as a tax reduction rather than a normal expense.
If the flat is owned through a limited company, the company must file annual accounts, a CT600, and a confirmation statement, and pay any Corporation Tax by the relevant deadline. No ATED return is normally needed if the property is worth £500,000 or less. The director may also need to file a personal tax return if they receive dividends or other untaxed income. The property may be the same, but the compliance rules are very different.
Conclusion
What counts as “annual accounts and tax returns” depends on how the property is owned. If you own it personally, you usually file a Self-Assessment tax return with SA100 and SA105. From April 2026, landlords with qualifying income over £50,000 must also follow Making Tax Digital for Income Tax, which means keeping digital records and sending quarterly updates.
If the property is owned through a limited company, the company must file annual accounts, a CT600 corporation tax return, and a confirmation statement, and pay any Corporation Tax by the relevant deadline. The director may still have personal Self-Assessment obligations as well, depending on their income. If you are unsure which rules apply, a specialist property accountant can help you stay compliant and avoid penalties.
Frequently Asked Questions
If you run a private limited company, you usually need to prepare and file annual accounts with Companies House each year. These are separate from the company’s tax return to HMRC.
A private limited company will usually need to deal with three main annual filings: annual accounts to Companies House, a Company Tax Return (CT600) to HMRC, and a confirmation statement to Companies House.
The main annual requirements are file annual accounts with Companies House, file the CT600 with HMRC, pay any Corporation Tax by its payment deadline, and file a confirmation statement at least once every 12 months. The Corporation Tax payment deadline is usually 9 months and 1 day after the end of the accounting period, while the CT600 is usually due 12 months after the end of that period.
If your property business is run through a limited company, then yes, the company will usually need to file annual accounts. If you own the property personally rather than through a company, you do not file company accounts with Companies House. Instead, you would usually report the income through Self-Assessment with HMRC.
Usually, yes. HMRC says you must tell them within 3 months of the company becoming active for Corporation Tax, and receiving rental income counts as being active.
Landlords should keep records of rent received and expenses, such as receipts, invoices and bank statements. For Self-Assessment, records generally need to be kept for at least 5 years after the 31 January filing deadline for the relevant tax year. Limited companies must keep accounting records showing their transactions, assets, liabilities and supporting documents. For Corporation Tax purposes, records generally need to be kept for 6 years from the end of the last company financial year they relate to.
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