What the 2025 Autumn Budget Means for Your Portfolio

The 2025 Autumn Budget, delivered on 26th November 2025 by Chancellor Rachel Reeves, might go down as one of the most consequential for landlords in recent years. Between new tax rises, frozen thresholds, regulatory changes, and more, small landlords, buy-to-let owners, and rental property investors face a perfect storm.

Below, we cut through the headlines to explain what's changing and why you need to review your rental strategy right now.

Key Takeaways from the 2025 Autumn Budget

There was a lot that went into this budget, with increased spending on the NHS, education, infrastructure, defence, scrapping the two-child benefit cap, and other welfare reforms, but we want to focus on the core elements that will impact you, your investments, and ultimately the viability of your buy-to-let business. 

Income Tax & National Insurance: Frozen thresholds + ongoing pressure

The Budget extends the freeze on income tax thresholds until 2030/31. That means the personal allowance (£12,570), higher-rate threshold (£50,270), and additional-rate threshold (£125,140) stay at 2021/22 levels, even as inflation and wages rise. This "fiscal drag" quietly pushes more people into higher tax bands over time.

National Insurance pressures remain part of the backdrop too, as previous reforms increased employer NIC and squeezed wage growth. For many households and small businesses, this means less take-home pay, less room for wage increases, and higher cost pressures.

Tax on Investment, Savings, and Asset Income is Going Up

One of the headline changes: the government is raising tax rates on dividends, savings interest, and (crucially for landlords) property income.

From April 2027, new separate "property income" tax bands apply: 22% (basic), 42% (higher), 47% (additional).

Dividend tax increases by 2 percentage points from April 2026, taking rates to 10.75% and 35.75% for basic and higher-rate taxpayers.

The 2-point increase on dividend tax affects landlords who draw profits from limited companies. As dividend income becomes more expensive in tax, the relative attractiveness of rental income via companies declines.

Savings income tax also rises by 2 percentage points from April 2027.

The government's stated rationale: income from assets is taxed more lightly than employment income (since it doesn't attract NIC). These changes are meant to "narrow the gap."

New "High Value Council Tax Surcharge" on Expensive Homes

From April 2028, the Budget introduces a "mansion tax", a High Value Council Tax Surcharge on residential properties worth £2 million or more in England.

Charges are planned at £2,500–£7,500 per year, depending on the value band. Although only a small share of properties will be affected (the government estimates fewer than 1%), this adds a new dimension of wealth-based property taxation and uncertainty for high-value portfolios.

Incorporation Relief No Longer Automatic

The government confirmed that from 6 April 2026, Incorporation Relief under Section 162 TCGA 1992 will no longer apply automatically. Landlords will be required to actively claim the relief. This change appears in the Government’s policy paper titled “Capital Gains Tax: Incorporation Relief claims.”

This relief has been the backbone of many legitimate restructuring plans for years. It has allowed landlords to transfer a genuine property business into a company and defer Capital Gains Tax. 

What Does This All Mean for Landlords?

These changes have real consequences for rental-property owners. The combination of increased taxes, shifting regulations, and rising costs means rental business economics have fundamentally been reshaped and not for the better.

Net yields will be squeezed. Margins that looked acceptable on paper may no longer deliver.

This isn't new; it's been building quietly for years. Section 24 mortgage interest restrictions hit back in 2017. EPC regulatory change, safety certificates, and then the abolition of the Furnished Holiday Lettings tax regime in April 2025. And the Renters' Rights Act is adding even more pressure.

But this Budget takes it further. By singling out property income for separate, higher tax bands while piling on costs, the government is betting landlords will either absorb the hit or exit quietly. Neither outcome helps tenants, but that's not the priority here. 

The priority is filling a £20+ billion fiscal hole, and landlords are footing a disproportionate share of the bill.

Broader Property Market Implications

The tax and regulatory changes ripple beyond landlords' bottom lines, affecting tenants, housing supply, and market stability.

Supply crunch drives rent inflation

"Despite claims of tackling cost of living pressures, the Government is pursuing a policy that the Office Budget Responsibility has made clear will drive up rents. Almost one million new homes to rent are needed by 2031. But this Budget will clobber tenants with higher costs while doing nothing to improve access to the homes people need."

- Ben Beadle, Chief Executive, NRLA

"Repeatedly targeting landlords through tax adjustments may encourage them to exit the market, reducing the supply of rental properties and, in turn, driving up rents for tenants. Ultimately, the additional tax revenue is relatively modest, and the long-term impact is likely to fall not on landlords, but on the very people who rely on the rental sector for affordable housing."

- Craig Hughes, Partner and Head of Private Client Services, Menzies LLP

As marginal landlords exit, rental supply shrinks. Smaller landlords (the backbone of local markets) will be either forced to sell up or raise rents.

The result: accelerated rent inflation in high-demand areas, hitting tenants already struggling with cost-of-living pressures. Landlords maintaining yields will pass costs to tenants just as wages stagnate.

Institutional landlords consolidate the market

Small landlords that can't absorb these costs will exit. And institutional operators will likely step in.

Expect corporatisation: less diversity in ownership, more rigid contracts, less personalised service.

Quality and value erode

Squeezed margins mean deferred maintenance and delayed energy upgrades could lead to rental stock quality deteriorating over time.

For high-value properties facing the mansion tax: softening demand, reduced liquidity, lower valuations. These become less attractive investments.

What Landlords Should Do Right Now

Given the magnitude of the changes, now is not the time for "wait and see." Here are concrete steps landlords should take:

Re-run profitability models using "after-tax, after-cost" assumptions. Use realistic rent, operating expenses, insurance, and tax figures (assuming property-income tax at 22–47%). Reassess whether each property still meets your yield/hurdle rate criteria.

Stress-test portfolios under worst-case scenarios. Model vacancy, rent freezes, higher interest/mortgage rates, maintenance spikes, and regulatory upgrades. Explore downside cases (e.g., exit or sale).

Reassess rent strategy carefully. If you plan to raise rents, consider tenant affordability and local market conditions. Excessive rent increases risk higher vacancy or longer void periods. Balance yield recovery vs long-term tenant retention.

Consider diversifying or restructuring investments. Consider dropping marginal properties, consolidating your portfolio, or shifting to other asset classes. Explore potential benefits of running via limited companies, but model carefully, because dividend-tax and property-tax increases change the calculus.

Improve compliance and record-keeping now. Get ahead of EPC requirements, property maintenance, gas/electrical/fire safety certifications. Use a property-management tool (like Landlord Studio) to track income, expenses, and to model future scenarios.

The 2025 Autumn Budget for UK Landlords

The 2025 Autumn Budget marks a turning point. Between higher taxes on rental income, dividends, and savings, combined with frozen thresholds, rising regulatory costs, and an impending "mansion tax", landlords in the UK are being asked to absorb a heavy burden.

For many, the traditional buy-to-let model may no longer work as it once did.

But this doesn't mean there is no path forward. Landlords who act early by recalibrating their portfolios, stress-testing returns, tightening expense and compliance controls, and planning strategically still have a chance to adapt.

Landlords who ignore the changes face a rude shock in 2027-28. For those who prepare now, there's still time to navigate the turbulence, but the rules of the game are changing, permanently.

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