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National Insurance on Rental Income Could Send Rents Soaring!

Published Date: October 24, 2025

( Last Updated: October 24, 2025 )

The UK private rental market is bracing for a potential upheaval. Reports indicate that the Chancellor is considering imposing National Insurance on rental income, a move that could significantly reduce landlords’ profits and, ultimately, drive rents higher for tenants.

If you’re a landlord or a tenant in the UK, it’s crucial to understand exactly what this could mean for your finances and the wider rental market.

What Exactly is Being Proposed with National Insurance on Rental Income?

National Insurance (NI) is usually something paid by employees and employers on wages. But it is apparently now being proposed that it should be extended to income generated from rental properties. This would mean effectively treating landlords’ earnings like wages. Estimates are that this could raise around £2.3 billion in extra revenue.

But for many landlords, this is uncharted territory. Currently, most rental income is taxed through Income Tax and NI has never applied to it. Its introduction could therefore be seen as an additional financial burden on landlords, reducing the profitability of Buy-to-Let investments.

Will This Push Landlords Out of the Rental Market?

Experts say that this move could prompt landlords to consider selling some or all of their properties. This opinion is supported by data from a recent survey where:

  • Around 72% of brokers said landlords might sell properties
  • Nearly half (45%) could exit the market entirely
  • Another 27% might reduce their portfolio, keeping only the most profitable properties

The reasoning is simple. Landlords are already facing increased costs, from rising mortgage rates to new regulations. Adding National Insurance could push returns below acceptable levels, making some properties unviable as investments.

How Will National Insurance on Rental Income Impact Rents in the UK?

If a significant number of landlords sell or scale back their holdings, the supply of rental properties would shrink. Meanwhile, demand remains strong, creating a classic supply-demand imbalance. When fewer homes are available, landlords who remain in the market may raise rents to protect their profits.

Therefore, the introduction of NI on rents could drive up rents as landlords try to recoup the additional National Insurance costs. In practical terms, this means tenants could face higher monthly payments just to maintain the same level of accommodation.

Will the Government Collect As Much Money As Expected?

It is projected that this could bring in £2.3 billion in new revenue, but this figure could be overly optimistic. If many landlords sell up or restructure their holdings, the actual tax take may be lower. For example, if a million landlords end up selling their properties altogether, the government’s projected NI revenue could fall substantially.

Moreover, calculations are based on the 2.2 million landlords who received £27 billion in rental income in 2022/23. Real-world changes in the rental market could reduce the number of landlords liable, lowering the anticipated revenue.

What This Means for Landlords

For landlords, the potential introduction of National Insurance on rental income represents more than just a line in the tax code. It could influence investment decisions, cash flow and long-term strategy.

Landlords should start considering:

  • Financial Modelling - How would the extra NI affect your net returns? Could your properties remain profitable?
  • Portfolio Review - Should you consider selling some properties or restructuring holdings?
  • Property Ownership Structure - Those who operate through a limited company may experience different impacts. Understanding your structure will be essential.
  • Tenant Communication - Any rent increases need careful handling to maintain relationships and avoid legal complications.

The key takeaway is that proactive planning now may prevent unpleasant surprises later.

What This Means for Tenants

Tenants will likely feel the ripple effects in several ways:

  • Rising Rents - Reduced property supply plus higher landlord costs could push rental prices up.
  • Increased Competition - Fewer rental options may make finding a home more difficult, especially in high-demand areas.
  • Budget Adjustments - Tenants may need to reassess their affordability limits and plan ahead.
  • Negotiation Opportunities - While landlords may be raising rents, negotiating longer-term leases or incentives may help offset some costs.

Understanding these potential impacts allows tenants to prepare and respond strategically rather than being caught off guard.

Why This Change Is Under Consideration

The government is under pressure to generate revenue without altering headline Income Tax rates. Rental income represents a sizeable, relatively identifiable group, making landlords a logical focus for additional tax measures. National Insurance on rental income is therefore seen as a possible way to boost the Treasury’s coffers while targeting a specific income source.

However, the reaction from landlords could undermine the policy’s effectiveness. Widespread sell-offs or restructuring could reduce the anticipated revenue and create unintended consequences for the rental market.

Uncertainties & Unknowns with National Insurance on Rental Income

At this stage, several critical questions remain unanswered:

  • Rate - Will the NI rate mirror employee/employer contributions or be set differently?
  • Exemptions - Could small landlords, older landlords or company-owned properties be treated differently?
  • Timing - When would this policy take effect? Immediate implementation could shock the market whereas phased introduction might soften the impact.
  • Administration - How will landlords report and pay NI on rental income? New forms or procedures may be required, adding to compliance costs.

Until legislation is published, all numbers are provisional and the exact implications remain speculative.

Conclusion

The potential introduction of National Insurance on rental income marks a major shift in the UK private rental market. For landlords, it could squeeze profits and force strategic decisions about whether to sell, hold or restructure property portfolios. For tenants, the risk is higher rents and reduced choice.

If you’re a landlord worried about how National Insurance on rental income could impact your portfolio, don’t wait until it’s too late. Speak to UK Property Accountants today to understand your options, plan ahead and protect your profits. Our team can help you navigate complex tax rules and ensure your rental business stays profitable in a changing market.

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