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National insurance shock could push landlords to quit

3 June 2026
By Liz Barclay

3 June 2026

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Liz Barclay

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Britain’s landlords are bracing for a fresh tax hit amid reports the Treasury is considering extending National Insurance to rental income for the first time. Supporters say it would be a fair way to raise billions for the public finances. Critics warn it could trigger higher rents, fewer rental homes and another wave of landlords quitting a market that is already under severe strain.

CHANCELLOR EYES NEW NATIONAL INSURANCE RAID

The UK’s landlords are bracing for a fresh tax bombshell, with Treasury insiders whispering that the Chancellor is considering slapping National Insurance on rental income for the first time ever.

The move, billed as a “fairness measure” by some in Whitehall, could raise £2 or £3 billion a year. But critics warn it could also blow a hole in the rental market, push up rents, and force thousands of small landlords to sell up.

And with the UK already in the grip of a housing shortage, many are asking: Is this the moment the rental market finally snaps?

WHAT’S BEING PROPOSED

Right now, landlords pay:

  • Income tax on rental profits

  • Capital gains tax when they sell

  • Stamp duty surcharges when they buy

  • Mortgage interest restrictions

  • And a mountain of compliance costs

They don’t pay National Insurance on rental income. That’s because it’s classed as investment income, not earnings.

The Chancellor is reportedly looking at changing that, meaning landlords could face:

  • Class 4 NI at 6% or more on rental profits

  • On top of income tax

  • On top of existing landlord‑specific taxes

For a landlord earning £15,000 in rental profit, that’s an extra £900 a year. For someone with £30,000 profit, it’s £1,800.

Small landlords say they’re already on the brink. This could push them over.

THIS WILL TORCH THE RENTAL MARKET

fire in front of building

Photo by Rineshkumar Ghirao on Unsplash

Landlord groups say the move would be a disaster, warning:

  • More landlords will sell up

  • Fewer rental homes will be available

  • Rents will rise even faster

  • Young people will be hit hardest

  • Small landlords, not big corporate investors, will take the pain

Landlords feel they’re being used as cash machines and that the Government just keeps squeezes harder. However, it’s the tenants already finding rents a nightmare who end up paying in terms of rent increases. If there’s Ni on top of everything else landlords will sell making places to life even harder to find.

WHAT DAMAGE COULD IT DO?

The impact could be brutal:

1. Higher rents

If landlords’ costs rise, rents rise. Simple economics.

2. Fewer rental homes

Small landlords provide 8 out of every 10 of rental properties. If they leave, supply collapses.

3. More evictions and forced sales

Landlords who can’t absorb the cost will exit the market.

4. More pressure on councils

They’re already struggling with record homelessness.

5. More power for big corporate landlords

Small landlords leave. Institutional investors move in. Tenants lose choice.

THE RENTAL MARKET IS ALREADY ON ITS KNEES

Coming on top of the Renters’ Rights Act:

  • Rents are at record highs

  • Demand is outstripping supply in every region

  • Landlords face new energy rules, licensing fees, and compliance costs

  • Mortgage rates have doubled for many

  • Thousands of landlords have already quit the sector

Adding NI could be the final straw.

The Treasury hasn’t confirmed that this latest suggestion is any more than just that. It is possible it’s another of the Chancellor’s kite flying exercises to gauge how such a move would be received. But there have been no denials either. Either way it’s doing damage by causing more uncertainty. The next budget is likely to be in October so there’s plenty of time for more of these money raising suggestions to surface. In the run up to the last budget businesses simply stopped investing while waiting to find out what was speculation and what might become reality. We can’t afford to have a repeat of that but obviously the treasury didn’t learn any lessons. If businesses pause investment the economy takes another step closer to stagnation.

Officials in the civil service say they are “exploring options to raise revenue fairly”, and no decisions have been made, but speculation fills a vacuum and the damage will be done.

Slapping National Insurance on landlords’ rental income might raise money for the Chancellor but it could also torch the rental market which is already smouldering. It could push up rents, drive out the small landlords who keep the system afloat and leave more people homeless on the streets.

With Britain already facing a housing crisis, can the rental market survive another tax raid and can tenants really go on paying the price? Enough really is enough.

National Insurance
rental income
Treasury
public finances
higher rents
rental market
housing shortage
income tax
capital gains tax
stamp duty surcharges

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National insurance shock could push landlords to quit