Ask a UK practice owner what has shaped 2026 and you will hear about quarterly updates, Companies House identity verification and the move of AML supervision. Very few will mention the change that quietly rewrites how a large slice of their client base is taxed. From April 6th 2027, property income stops being just another strand of non savings income and gets its own set of tax rates. Savings income rates rise on the same day. Dividend rates have already gone up this tax year.
None of this is speculation. It was legislated following Autumn Budget 2025 and HMRC has published the detail. What has not happened yet is the client conversation, and that is the gap practices can close over the coming months.
There are three separate movements to keep straight, because clients will mix them up.
Importantly, HMRC has confirmed that the way individuals report and pay tax on this income does not change. Only the rates change. Allowances and reliefs stay in place too, including the £1,000 property allowance, the Rent a Room threshold of £7,500 and the personal savings allowance.
Two points sounds modest until you run it as a proportion. A basic rate landlord moves from 20% to 22%, which is a 10% increase in the tax on the same rental profit. A higher rate landlord moves from 40% to 42%, a 5 per cent increase. For a client with £18,000 of net rental profit taxed at the higher rate, that is roughly £360 a year of extra tax on identical trading performance, before any other change.
Now layer on the point most firms have not yet joined up. April 2027 is also MTD for Income Tax phase two, which pulls in sole traders and landlords with qualifying income above £30,000. For a very large number of landlord clients, the same month brings a new rate structure and a new reporting obligation. If your firm handles both conversations separately, you will have the same conversation twice and bill for neither properly.
Buried in the detail is a change that will quietly reshape some computations. From April 2027 the income tax ordering rules change so that the personal allowance is set against employment, trading or pension income first. Structural allowances are not affected, so the dividend allowance, the personal savings allowance and the property allowance all continue to work as they do now.
For a client with a small trade or a modest pension plus a meaningful rental portfolio, the allocation of the personal allowance will no longer behave the way your spreadsheet from 2024 assumed. These are exactly the mixed income cases where a confident verbal estimate given in January can turn into an awkward call in the following summer. Model them properly rather than from memory.
The April 2027 landlord cohort is larger, lower in average fee value and less digitally prepared than the April 2026 group. If your firm absorbed phase one on goodwill and overtime, phase two plus a rate change plus the usual January crunch is not a workload you can absorb twice.
Three things are worth fixing now. First, update engagement letters and fee schedules so quarterly updates and rental schedule work are priced explicitly rather than bundled. Second, standardise your landlord data pack, so that rent, agent statements, mortgage interest and allowable expenses arrive in one consistent format instead of fourteen. Third, write the client communication once and send it to the whole segment, rather than explaining the same three rate changes individually for six months.
The Autumn Budget is being delivered on the 28th of October 2026. The property, savings and dividend changes described here are already legislated, so they are a planning baseline rather than a rumour, but it is sensible to tell clients that any advice given before Budget day is reviewed again afterwards. Framing it that way protects the firm and sets up a second, chargeable conversation in November.
TaxCalc customers can use Tax Return Production to model property and savings income across tax years, Client Hub to segment and tag landlord clients by qualifying income and marginal rate, and Engager to schedule the review work, the record keeping prompts and the quarterly deadlines so nothing depends on somebody remembering. If you are mapping your April 2027 capacity, our MTD resources and webinars are a good place to start.
Property income becoming a tax category in its own right is the most significant personal tax structural change most firms have not yet explained to clients. It arrives in the same month as MTD phase two, it changes the value of timing decisions, and it alters how the personal allowance is allocated for mixed income clients. Firms that run the segmentation now will have eighteen months of planning conversations to sell. Firms that wait will be explaining it in arrears, in April 2027, to clients who have already filed their first quarterly update.