1. The importance of the private rented sector
The private rented sector (PRS) plays a vital role in providing housing and supporting mobility, employment, and education. Millions of people rely on it — including families, young professionals, and key workers.
Private renting supports labour mobility, allowing people to live closer to work and adapt quickly to changing personal or professional circumstances. It also sustains local economies through landlord spending on maintenance, trades, and services.
Given this importance, government policy towards landlords directly impacts both the housing market and the wider economy.
2. How successive governments have increased taxes on landlords
Over the past decade, landlords have faced a series of tax and regulatory changes that have made operating in the PRS increasingly difficult. These policies, often designed to curb property speculation or promote home ownership, have ended up making it harder for landlords to provide affordable, quality homes.
a. Mortgage interest tax relief restriction (Section 24)
Since 2017, landlords can no longer deduct full mortgage interest from rental income before calculating tax. Instead, they receive a 20% tax credit on finance costs. This change has dramatically increased tax bills for many, particularly higher-rate taxpayers and those with mortgaged properties.
b. Stamp Duty Land Tax (SDLT) surcharge
In 2016, the government added a 3% surcharge to the purchase of additional properties. This significantly increased acquisition costs and discouraged new investment in rental housing.
c. Capital Gains Tax (CGT) tightening
Landlords now face higher CGT rates when selling investment properties and reduced annual exemptions, discouraging them from reinvesting or restructuring their portfolios.
d. Digital tax reporting
From 2026, landlords earning over £50,000 in gross rental income will need to comply with Making Tax Digital requirements, adding new administrative burdens and costs.
e. Constant policy uncertainty
Frequent changes to tax rules and proposals for further reforms create instability and make it difficult for landlords to plan long-term investments in the sector.
3. The knock-on effects: fewer homes, higher rents, and reduced quality
Impact on landlords
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Reduced profitability: Higher tax burdens mean smaller returns. In many cases, landlords now pay tax on notional income that doesn’t reflect their actual cash flow after mortgage interest.
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Market exits: Thousands of small landlords have chosen to sell their properties, unable to justify the reduced margins and increased complexity.
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Fewer new entrants: With higher stamp duty and limited tax relief, fewer individuals are investing in rental property.
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Incorporation pressures: Some landlords have resorted to forming limited companies to regain interest deductibility — an expensive and complex process unsuitable for many small operators.
Impact on the housing supply
The result of these policies is a measurable decline in available rental homes. Landlords leaving the market reduces overall supply, while new investors are deterred by the cost of entry. This supply shortage pushes rents higher and reduces tenant choice.
At the same time, landlords with tighter margins may delay property improvements, leading to a gradual decline in housing quality.
Impact on tenants and the economy
Higher rents are the most visible outcome, but the effects run deeper. Reduced supply limits tenant mobility, making it harder for people to relocate for work or education. Young people and families on lower incomes face increased competition and insecurity.
Ultimately, as rental costs rise and fewer homes are available, the economic flexibility that the PRS once provided begins to erode.
4. Why landlords are taxed more harshly than other businesses
The increased taxation of landlords reflects a combination of political and structural factors:
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A convenient target: When housing affordability becomes an issue, landlords are often blamed, making them politically easy to tax.
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Immovable assets: Property can’t be relocated abroad, so it’s an easy base for tax collection.
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Perception of past privilege: Policymakers argue that earlier tax reliefs were overly generous, even though they reflected legitimate business expenses like loan interest.
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Desire to rebalance housing: Some governments have sought to shift ownership away from landlords towards first-time buyers, using tax as a lever to discourage buy-to-let investment.
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Different treatment to other businesses: Most businesses can deduct finance costs and reinvest profits with fewer restrictions. Landlords, often treated as individuals rather than business owners, face a harsher and less flexible tax regime.
5. The real-world consequences
The tightening tax environment has already reshaped the rental landscape. Over recent years, the number of rental homes available has fallen, while demand has continued to rise. Rents have surged accordingly — in some regions by more than 25% over the past few years.
Many landlords report that the combined impact of Section 24, stamp duty surcharges, and higher CGT has made continuing in the sector unsustainable. Others have switched to short-term lets or incorporated as limited companies to remain viable.
Meanwhile, tenants face rising rents, reduced security, and fewer options. This undermines labour mobility, makes saving for a deposit harder, and contributes to broader economic strain.
6. What needs to change
A sustainable private rented sector requires balance. The government must recognise that landlords are not the cause of housing shortages — they are part of the solution.
Fair treatment of landlords doesn’t mean special privilege; it means allowing them to operate under the same principles as other businesses. Restoring full mortgage interest relief, reducing stamp duty surcharges, and stabilising regulation would encourage new investment and help keep rents affordable.
The alternative — continuing to tax landlords more heavily — risks further reducing supply, worsening the housing crisis, and stifling economic growth.
7. Conclusion
Successive governments have used taxation to reshape the rental market, but the result has been counter-productive. Heavy-handed tax policy has driven landlords out, reduced the number of available homes, and inflated rents for tenants.
If the UK wants a healthy, competitive, and affordable rental market, it must stop treating landlords as easy revenue sources and start recognising them as vital providers of housing.
The private rented sector thrives when taxation is fair, investment is encouraged, and policy is stable. Until that happens, both landlords and tenants will continue to pay the price.
8. NetRent’s view
At NetRent, we work with landlords across the UK who want to provide safe, high-quality, and affordable homes. We see first-hand how excessive taxation and regulation are discouraging good landlords and reducing rental supply.
We urge policymakers to consider the long-term consequences of these measures. Supporting responsible landlords is essential if the UK is to maintain a functioning, balanced housing market that works for everyone.