UK Buy-to-Let Mortgage Changes: What Landlords Need to Know in 2026

UK Buy-to-Let Mortgage Changes: What Landlords Need to Know in 2026

The buy-to-let landscape in the UK has changed significantly over the past decade. For landlords planning to purchase, remortgage, or expand their portfolio in 2026, here's what matters most.

Stress Testing: Higher Thresholds

Lenders typically require rental income to cover 125–145% of the mortgage payment at a stressed rate of 5–5.5%. With higher Bank of England base rates than the pre-2022 era, this limits the maximum loan size available relative to rent.

Limited Company Structures

Since the phasing out of mortgage interest tax relief for individual landlords, purchasing through a limited company (Special Purpose Vehicle) has become more tax-efficient for higher-rate taxpayers. Company buy-to-let mortgages attract different criteria — typically higher deposit requirements and slightly higher rates, but with full mortgage interest deductibility against corporation tax.

Increasing Deposit Requirements

Many lenders have tightened minimum deposit requirements for BTL to 25–30%, with lower LTV products carrying significantly better rates. Having larger deposits is increasingly essential for portfolio landlords.

EPC Requirements

The government's intention to require EPC ratings of C or above for rental properties by 2028 (subject to legislative confirmation) is driving landlords to factor energy improvement costs into their investment calculations. Properties with low EPC ratings may become harder to finance.

Portfolio Landlord Criteria

Landlords with four or more mortgaged properties face specialist underwriting. Lenders assess the entire portfolio — not just the property being financed — making stress testing across all properties a requirement.