If you own several UK rental properties, the useful tax review before 5 April 2027 is wider than simply estimating the next Self Assessment bill. You should look across the portfolio at projected rental profit, mortgage finance costs, ownership, carried-forward losses, planned purchases and disposals, and whether Making Tax Digital applies.
The timing matters because separate property-income tax rates of 22%, 42% and 47% are due from 6 April 2027 for England, Wales and Northern Ireland, and residential finance-cost relief is due to use the new 22% property basic rate. HMRC has published the 2027 property-income changes here. Scottish taxpayers can be subject to different Income Tax rules, so the position should be checked separately where relevant.
What should a portfolio landlord review before 5 April 2027?
For most landlords with multiple properties, these are the eight areas worth checking before the tax year ends:
- the expected profit or loss across the whole UK rental business;
- mortgage interest and the difference between cash flow and taxable profit;
- the effect of the April 2027 property-income tax rates;
- how jointly owned properties are actually split for tax;
- unused property losses carried forward from earlier years;
- whether the next purchase should be personal or through a company;
- Capital Gains Tax planning before a property sale completes; and
- whether Making Tax Digital applies now, from April 2027, or from April 2028.
1. Look at the portfolio as one UK property business
For most individual landlords, income and expenses from several UK rental properties are treated as one UK property business. HMRC explains that the activities are normally combined even where the taxpayer owns several properties.
That means a loss on one property can generally reduce profit from another property within the same UK property business. For example:
- Property A profit: £15,000
- Property B loss: £4,000
- Combined property-business result: broadly £11,000 before other relevant adjustments
For management, however, we would still keep records property by property. The tax return may combine the business, but you still need to know which properties are generating cash, which are absorbing repairs, and which are carrying the most finance cost.
2. Forecast the April 2027 property-income tax changes
For 2027/28, the government has set out separate property-income rates of 22% at the basic rate, 42% at the higher rate and 47% at the additional rate for England, Wales and Northern Ireland.
For a portfolio landlord, that makes the 2026/27 year-end review more useful than usual. We would forecast:
- expected rental profit;
- mortgage finance costs;
- salary, dividends and other personal income;
- planned purchases or refinancing;
- planned property sales; and
- whether the present ownership structure still fits the next few years.
The point is not to restructure simply because tax rates change. It is to understand the effect before you commit to a purchase, disposal, refinance or change in ownership.
3. Do not confuse cash left in the bank with taxable rental profit
A heavily financed landlord can feel as though very little cash is left after mortgage payments, while still having a much larger taxable property profit.
For individual residential landlords, mortgage interest is generally not deducted in the same way as ordinary property expenses. Instead, relief is given through a tax reduction. HMRC sets out how the residential finance-cost restriction works.
For landlords with several mortgages, we would therefore estimate both figures before year end:
- cash flow after mortgage payments; and
- taxable property profit after the tax rules are applied.
Those two numbers can be very different. Planning around the wrong one is how a tax bill becomes a surprise.
4. Check jointly owned properties before assuming the income split
Where spouses or civil partners living together jointly own property, the income is normally taxed 50:50 unless the conditions for a different split are met. HMRC describes the 50:50 rule and the Form 17 rule here.
A different tax split is not simply chosen because one person pays less tax. It must reflect the genuine beneficial ownership. Where the true beneficial interests are unequal, a valid Form 17 declaration may be relevant.
If ownership has changed, or records do not match what has been reported, review it before the next return rather than after HMRC asks the question. The official Form 17 and guidance are available on GOV.UK.
5. Check carried-forward property losses
Rental-business losses are generally carried forward and used against future profits of the same property business. HMRC explains the carry-forward rule in its Property Income Manual.
This becomes particularly important where a landlord has changed accountant, sold a property, had a large repair year, or returned to profit after a weaker period. Check:
- whether historic losses exist;
- how much has already been used;
- what balance remains; and
- whether the losses belong to the same continuing property business.
A loss that is already available is very different from a new tax-planning idea. It is part of the existing tax history and should not disappear simply because the records changed hands.
6. Decide how the next property should be owned before you buy it
“Should the next property be in my own name or through a limited company?” is not a question with one universal answer.
The decision can depend on borrowing, mortgage pricing, other income, how profits will be used, future purchases, Corporation Tax, Income Tax, Capital Gains Tax and the long-term exit plan.
Our view is that the structure question is most useful before the next purchase, not after completion. Moving an existing property into a company later can create separate tax, legal, financing and transaction-cost issues.
For a broader overview, see our accounting support for property investors and our tax-planning service.
7. Start the Capital Gains Tax calculation before a sale completes
If one property may be sold, start collecting the figures before completion. Useful records include:
- original purchase price;
- SDLT and acquisition costs;
- legal and professional fees;
- qualifying capital improvements;
- selling costs;
- ownership percentages; and
- available capital losses.
Where Capital Gains Tax is due on a UK residential-property disposal, UK residents generally need to report and pay it within 60 days of completion. GOV.UK explains the 60-day reporting requirement here.
Waiting until the annual tax return is prepared can therefore be too late. Old completion statements and improvement invoices are worth finding before a buyer is already waiting to complete.
8. Check whether Making Tax Digital applies to you
Making Tax Digital for Income Tax began on 6 April 2026 for the first group of landlords and sole traders. HMRC’s current timetable is:
- more than £50,000 qualifying income: from 6 April 2026
- more than £30,000 qualifying income: from 6 April 2027
- more than £20,000 qualifying income: from 6 April 2028
The threshold is based on qualifying gross income from self-employment and property, not simply the taxable profit after expenses. That means a landlord with high gross rents can fall into MTD even where mortgage costs and other expenses leave much less cash.
If your records are still being reconstructed once a year, this is a good point to move to MTD-ready bookkeeping and make sure the Self Assessment process is built from the same records.
A practical year-end checklist for landlords with multiple properties
- What is the expected rental profit for 2026/27?
- How much residential finance cost is being paid across the portfolio?
- How would the April 2027 property-income rates change the forecast?
- Are jointly owned properties being taxed on the correct ownership split?
- Are any property losses still available to carry forward?
- Is another property likely to be bought, refinanced or transferred?
- Is any property likely to be sold in the next 12 months?
- Does MTD apply now, from April 2027, or from April 2028?
The more properties you own, the more useful it becomes to plan around the portfolio rather than treating each tax return as a separate annual event.
Frequently asked questions
Are several UK rental properties treated as one property business?
Generally, yes. For most individual landlords, UK property activities are combined into one UK property business for tax purposes, although property-by-property records are still useful for management.
Can a loss on one rental property reduce profit on another?
Generally, yes, where both properties form part of the same UK property business. The combined result is calculated across that business, subject to the normal property-income rules.
Are landlord tax rates changing in April 2027?
Yes. Separate property-income rates of 22%, 42% and 47% are due from 6 April 2027 for England, Wales and Northern Ireland. Scottish treatment should be checked separately where relevant.
Is Making Tax Digital based on rental profit?
No. The MTD threshold uses qualifying gross income from property and self-employment before expenses, rather than the final taxable profit.
Can spouses choose any rental-income split they want?
No. Jointly owned property income is normally taxed 50:50 for spouses and civil partners living together unless the genuine beneficial ownership is different and the relevant conditions, including Form 17 where required, are met.
Should I buy my next rental property personally or through a company?
There is no single answer. The right structure depends on borrowing, other income, how profits will be used, future purchases and disposals, and the wider tax and financing position.
How quickly must Capital Gains Tax be reported after selling a rental property?
Where Capital Gains Tax is due on a UK residential property disposal, the usual deadline is 60 days from completion.
Tax reporting tells you what happened. Tax planning helps before it happens.
For a landlord with one property, the main question may be what belongs on the tax return. With a larger portfolio, the better questions are usually about the next 12 months: what will be bought, sold, refinanced, repaired, transferred or retained, and what those decisions do to both tax and cash flow.
That is where planning starts to add value. It gives you time to compare options before a transaction fixes the tax position.
How Dali & Co can help portfolio landlords
Dali & Co works with landlords and property investors on the recurring accounting work and the decisions that sit around it.
- rental-property bookkeeping and accounts;
- Self Assessment and property-income reporting;
- MTD-ready digital records;
- joint ownership and rental-income splits;
- mortgage finance-cost calculations;
- property losses;
- company versus personal ownership questions;
- Capital Gains Tax reporting and disposal planning; and
- tax planning before purchases, refinancing and disposals.
If you own several rental properties and are planning a purchase, sale, refinance or ownership change, book a free consultation before the transaction is fixed. The useful planning usually happens while there is still a decision to make.
Reviewed by Dali & Co Accountants | Last reviewed: 2 September 2026
This article provides general information only and does not constitute tax, legal, mortgage or investment advice. Property taxation depends on individual circumstances and location.