With the government under pressure to raise revenue, attention is increasingly turning towards assets such as housing. Although income tax increases now appear unlikely, a range of housing-related tax reforms are being explored — any of which could significantly influence homeowners, landlords and property investors across the country.

For investors in particular, these proposals could create both challenges and new opportunities. Below is a clear breakdown of the potential policies being discussed and how we feel each might affect the market. We have also scored them out of ten on how likely we feel they are to be introduced.

1. Capital Gains Tax on Main Residences

The Proposal (Likelihood 5/10)

Currently, capital gains tax (CGT) applies to second homes and investment properties — not primary residences. A possible reform being considered would extend CGT to main homes valued above around £1.5m.

Potential Market Impact

• This would mainly affect London and the South East, where most higher-value homes are located.

• Many long-term homeowners could face sizeable tax bills due to decades of price growth.

• A significant number of sellers might simply decide not to move, reducing the availability of larger family homes on the market.

• Threshold-based taxation could also create “price cliffs”, encouraging sellers to list properties just under £1.5m.

For investors, reduced mobility among homeowners could increase demand for rental properties and larger family homes.

2. A New ‘Mansion Tax’

The Proposal (Likelihood 4/10)

This concept has resurfaced several times over the years. The latest version under discussion is a 1% annual tax on the portion of a home’s value above £2m.

Potential Market Impact

• The majority of affected homes would again be in London and the South East.

• A £2.5m property, for example, could attract an annual charge of £5,000.

• Values of affected homes could fall 5–10% as buyers factor in the extra ongoing cost.

• As with CGT, the £2m threshold could generate a “cliff-edge” in pricing and distort demand.

For investors focused on prime markets, this could result in price softening, creating buying opportunities — but with higher annual holding costs.

3. Higher Council Tax for Expensive Homes

The Proposal (Likelihood 6/10)

Rather than a full council tax overhaul, the government may simply add new top-end tax bands or increase rates for bands G and H.

Potential Market Impact

• Homes worth roughly £750,000+ would likely see their annual bills rise significantly.

• Up to one million households could be affected.

• Because council tax is ongoing (unlike stamp duty), this could dampen demand for higher-value homes in many areas.

For investors, especially those targeting premium rentals, higher council tax could initially push rents up as landlords pass on costs — though longer-term this burden would likely settle back on owners.

4. National Insurance on Rental Income

The Proposal (Likelihood 7/10)

Landlords currently pay income tax on rental profits but no National Insurance Contributions (NICs). A new proposal could change that, charging NICs in a similar way to employment income.

Potential Market Impact

• Many smaller or accidental landlords would see profits reduced.

• Heavily mortgaged landlords would be hit hardest, particularly those on lower incomes.

• This could accelerate the trend of individual landlords exiting the sector or moving properties into limited companies.

Overall, this could reduce rental stock — placing upward pressure on rents and opening opportunities for professional landlords and portfolio investors.

5. A Proportional (Annual) Property Tax

The Proposal (Likelihood 3/10)

This is a more radical idea: replacing stamp duty and council tax with a single annual tax based on a property’s value.

Several models have been floated, but most involve an annual percentage charge (typically 0.4–0.8%) paid by homeowners.

Potential Market Impact

• Moving home would become cheaper, potentially increasing market activity.

• Many households in high-value areas would pay more annually.

• Landlords could attempt to pass costs to tenants, especially in areas with high property values.

This would simplify the system but shift cost burdens onto property owners rather than buyers — a major change that would reshape investor strategies.

6. Shifting Stamp Duty to Sellers

The Proposal (Likelihood 3/10)

Instead of buyers paying stamp duty, sellers of homes worth over £500,000 could become responsible for the tax.

Potential Market Impact

• Downsizers would be discouraged from moving — exactly the group the market most needs to free up family homes.

• Market activity could slow sharply, reducing overall supply.

• If combined with CGT reforms, reluctance to sell would increase even further.

For investors, fewer homeowners moving could mean greater reliance on the rental market and more demand for good-quality rental stock.

What This Means for Property Investors

While none of these policies are yet confirmed, the direction of discussion makes clear that the property sector will play a central role in upcoming tax strategy. The overall theme is simple:

✔ More pressure on individual homeowners and landlords
✔ More incentives for professionalisation and corporate structures
✔ Likely long-term increases in rental demand
✔ Potential price adjustments in higher-value brackets

For savvy investors, periods of policy change often create some of the best buying opportunities — especially when others pause to wait and see.

If you’d like help planning your next investment or understanding how these proposals may affect your strategy, North Fox Property is here to assist.