Landlords to Pay National Insurance on Rental Income: Proposal or Policy?

The Government is looking at applying National Insurance (NI) to rental income, something that has never been taxed in this way before. The Chancellor is under pressure to plug a £40bn budget gap, and charging an 8% NI rate on landlords’ rental profits could raise more than £2bn a year.

According to HMRC data, landlords declared £27bn in net rental income during 2022–23, so the measure could significantly boost Treasury revenues. While this is a major proposal, it is still only at the discussion stage. Landlords should therefore be alert but cautious, and avoid being drawn into fear-mongering headlines until details are confirmed.

For individual landlords, the impact could be sizeable. Someone earning between £50,000 and £70,000 in rental income could face an extra £1,000 or more in tax every year. This is on top of the income tax already paid, effectively doubling the bite taken from rental profits in some cases. The proposal has already sparked strong reactions across the sector, with many questioning whether the policy is workable or fair.

The National Residential Landlords Association (NRLA) has warned that if introduced, this change would inevitably filter down to tenants. Landlords already dealing with higher mortgage rates, tighter regulation, and reduced allowances may feel they have little choice but to raise rents to cover the extra tax. Estimates suggest that rents could climb by £900–£1,000 per year as landlords seek to balance the books.

There is also concern that the new tax could push some landlords to exit the market altogether. Margins are already slim for smaller investors, and another layer of cost could be the final straw. If landlords do sell up, the result would be fewer homes available to rent, which in turn would add more upward pressure on rental prices.

Another likely outcome is that more landlords will consider shifting their portfolios into limited company structures. Incorporating can help mitigate the NI burden, but it comes with its own costs and complexities, namely capital gains tax. A mass move towards company ownership could also reduce the Treasury’s expected returns from the policy.

Interestingly, this proposal comes at a time when landlord incomes are at their highest level in five years. Nearly three million unincorporated landlords reported rental income in 2023–24, showing that the sector remains large and resilient despite ongoing tax and regulatory pressures. The question is how much more it can absorb before significant numbers of landlords either change their strategy or leave the market altogether.

Avoiding Fear-Mongering
It’s important to stress again that this is not a confirmed policy. At this stage, the NI idea is being floated ahead of the Autumn 2025 Budget but has not been debated or legislated. Media coverage can sometimes veer into fear-mongering with alarmist headlines, so landlords should be cautious about which sources they rely on and avoid reacting too strongly to headlines. Preparing for possible outcomes makes sense, but there is no need for panic or drastic changes until official details are announced.

There have been rumours for some time about an increase in capital gains tax but this has so far not yet materialised, as it stands landlords are taxed for remaining in the market but there has been no increase in the financial penalty for exiting the market .

Key takeaways:

• An 8% NI charge on rental income is being considered, potentially adding around £1,000 in tax per landlord.

• The NRLA warns this could drive rents higher and force some landlords out of the sector.

• Many may pass the cost to tenants, while others may look at incorporating to reduce exposure.

• The rental market is strong but under pressure, and further taxation risks damaging supply.

• This is still only a proposal—be mindful of fear-mongering and wait for concrete government announcements.