Buy-to-Let Mortgages in 2026: A Broker’s Market Review

Buy-to-Let Mortgages in 2026 consultation with a couple and mortgage adviser reviewing landlord finance options.

Buy-to-Let Mortgages in 2026:  Buy-to-let lending entered 2026 with improving mortgage activity, stronger average rental yields and lower average borrowing rates than one year earlier.

However, better headline figures do not make every landlord case straightforward. Rental coverage, portfolio exposure, property type and ownership structure still determine whether an application fits lender criteria.

For brokers, the central question is not whether buy-to-let remains active. It is whether each property can support its borrowing under present-day costs and lender stress tests.

At a Glance

  • UK lenders completed 58,272 new buy-to-let loans during Q1 2026.
  • These advances were worth £10.8 billion.
  • Average gross rental yield reached 7.21%.
  • The average rate on new buy-to-let lending was 4.71%.
  • Lenders still assess rental cover, loan-to-value, landlord experience and wider portfolio exposure.
  • The Renters’ Rights Act introduced important changes for assured tenancies in England from 1 May 2026.
  • Strong case preparation matters more than selecting the lowest advertised rate.

What Does the 2026 Buy-to-Let Market Data Show?

The latest UK Finance buy-to-let lending data shows measured improvement rather than sudden expansion.

During Q1 2026:

  • 58,272 new buy-to-let loans were completed.
  • Lending reached £10.8 billion.
  • Loan numbers increased by 3.26% year on year.
  • Average gross rental yield rose from 6.93% to 7.21%.
  • The average rate on new lending fell to 4.71%.
  • Average interest cover reached 221%.

These figures indicate that rental income has strengthened against borrowing costs across the market. However, national averages cannot confirm whether one property will pass a lender’s assessment.

Each application must still be tested against the proposed loan, expected rent, product term and landlord profile.

Rental Stress Testing Remains Central

Most buy-to-let lenders assess whether the expected rent covers mortgage interest by a stated margin. This is commonly known as the interest coverage ratio, or ICR.

The calculation can vary according to:

  • The lender
  • The product and fixed-rate period
  • The landlord’s tax position
  • Personal or limited company ownership
  • The stressed interest rate
  • The property and tenancy type

A property may produce an acceptable yield but still fail a particular lender’s rental calculation.

Therefore, brokers should calculate rental cover before recommending a product. A lower headline rate has limited value when the lender’s stress test restricts the required loan.

For wider case preparation, read the Buy-to-Let Mortgage Guide.

Portfolio Landlords Need a Wider Assessment

A lender will usually treat an applicant with four or more mortgaged buy-to-let properties as a portfolio landlord.

The assessment may extend beyond the new purchase or remortgage. Lenders can review:

  • Property values
  • Mortgage balances
  • Rental income
  • Individual and overall loan-to-value
  • Existing monthly payments
  • Property types
  • Ownership structures
  • Landlord experience
  • Future borrowing plans

A complete property schedule should be checked before submission. Missing balances, outdated rents or inconsistent ownership details can delay underwriting.

The Portfolio Landlord Guide explains the evidence and portfolio checks brokers may need.

Limited Company Borrowing Requires Separate Planning

Limited company buy-to-let remains a significant part of specialist landlord lending. However, company ownership is not automatically suitable for every applicant.

Lenders may assess:

  • The company’s trading purpose and SIC codes
  • Directors and shareholders
  • Personal guarantees
  • Source of deposit
  • Existing company borrowing
  • Director experience
  • The wider property portfolio

Mortgage advice should be kept separate from tax advice. A broker can explain lender requirements, but the landlord should obtain qualified tax and legal advice before choosing or changing an ownership structure.

Brokers handling these applications can review the network’s Limited Company Buy-to-Let support.

Property Type Can Change the Lending Route

Standard single-household properties often have broader lender choice. More complex properties may require specialist underwriting.

Examples include:

  • Houses in multiple occupation
  • Multi-unit freehold blocks
  • Holiday lets
  • Student accommodation
  • Semi-commercial buildings
  • Properties requiring refurbishment
  • Properties with unusual construction
  • Properties subject to licensing or planning restrictions

The lowest visible rate may not suit the property, tenancy or borrower.

Complexity is not necessarily a reason to decline a case. It is a reason to explain the property, income and risk more clearly. The Complex Buy-to-Let Mortgages guide provides further case-placement context.

How the Renters’ Rights Act Affects the 2026 Review

Mortgage affordability should not be considered separately from landlord obligations.

New tenancy restrictions under the Renters’ Rights Act apply to assured tenancies in England from 1 May 2026. Landlords must meet both existing duties and the new requirements introduced by the Act.

Brokers do not provide tenancy-law advice. However, they should understand that changes to possession procedures, rent management and property standards may affect:

  • Business plans
  • Contingency reserves
  • Property management costs
  • Tenant strategy
  • Future cash flow
  • Portfolio risk

Landlords should review the official GOV.UK tenancy enforcement guidance and seek legal advice where required.

A Practical Buy-to-Let Review for 2026

Before submitting an application, brokers should confirm:

  • The achievable market rent
  • The lender’s ICR calculation
  • The requested loan-to-value
  • The applicant’s ownership structure
  • Current mortgage product end dates
  • Portfolio-wide borrowing
  • Property licensing requirements
  • Expected repairs and management costs
  • Available cash reserves
  • The landlord’s repayment and exit strategy

This process moves the conversation beyond rate comparison.

A mortgage is one part of the property model. A sustainable case requires the rent, borrowing, property and long-term plan to work together.

What Should Brokers Take From the 2026 Market?

The 2026 figures show a buy-to-let sector that remains active. Lending volumes and average yields have increased, while the average rate on new loans has reduced year on year.

Yet improvement at market level does not remove property-level risk.

Good advice begins with evidence. The broker must understand the property, calculate the rent, review the portfolio and present the application in a form the lender can assess.

Landlords seeking mortgage advice can use Connect Experts to find a buy-to-let mortgage adviser. Connect Experts is a directory and matching platform. Mortgage advice is provided by the adviser or firm selected by the customer.

Support for Buy-to-Let Mortgage Brokers

Connect for Intermediaries supports brokers working across standard, portfolio and complex buy-to-let cases.

The network provides access to lender relationships, case-placement support, compliance guidance, training and broader adviser services.

For advisers reviewing their current network, learn more about joining Connect Network.

Join Our Network section featuring Liz Syms from Connect Mortgages with adviser recruitment options for joining Connect Network

Some forms of buy-to-let mortgage are not regulated by the Financial Conduct Authority. Tax treatment depends on individual circumstances and may change. Landlords should obtain qualified tax and legal advice where required.