NatWest Raises Maximum Loan-to-Income Ratio to 6.5x for High Earners: What London Landlords Need to Know

What Has Changed?

NatWest recently announced an increase in its maximum loan-to-income (LTI) ratio to 6.5x for joint mortgage applications where the combined income is above £150,000. Previously, the lender’s LTI cap was generally lower (typically around 4.5x to 5x for many borrowers).

However, this increase comes alongside tighter upper loan-to-value (LTV) restrictions on some mortgage products, reflecting a cautious approach to risk despite the higher income multiplier.

Why This Matters for Private Landlords

The LTI ratio is a critical factor in mortgage affordability assessments. By raising the maximum to 6.5x for high-earning joint applicants, NatWest is effectively allowing some landlords to borrow more against their income. This can influence:

• Financing power for property purchases or portfolio expansion
• Refinancing options where landlords seek additional borrowing
• Affordability assessments for buy-to-let mortgages

For landlords with combined household incomes exceeding £150,000, this change could mean increased borrowing capacity, potentially unlocking opportunities to invest in higher-value rental properties or multiple units.

Implications Across Different Landlord Profiles

• Single-Unit Landlords: If you are applying jointly with a partner or co-borrower and your combined income exceeds £150,000, you may benefit directly from this increased LTI limit. This can help when financing properties in competitive London markets.

• HMO and Portfolio Landlords: Larger portfolio landlords often apply for multiple mortgages or refinancing. While the higher LTI can aid borrowing capacity, tighter LTV restrictions may limit the percentage of the property value that can be financed. Each mortgage product will have specific criteria, so careful comparison and planning are essential.

• Accidental Landlords: Those who have inherited or kept a property but are exploring further investment should note that higher LTI thresholds may improve borrowing options if their joint income qualifies, but affordability checks remain rigorous.

Practical Steps for Landlords

1. Review Your Mortgage Eligibility: Check your combined income and current borrowing limits. For those near or above the £150,000 joint income threshold, consult with mortgage brokers or directly with NatWest to understand how the new LTI limit applies to your circumstances.

2. Update Tenant Affordability Assessments: While this change primarily affects landlord borrowing, it can indirectly influence tenant affordability screening if landlords adjust rent levels based on financing costs. Ensure your tenant affordability assessments reflect any changes in mortgage costs or borrowing criteria.

3. Monitor LTV Restrictions: Higher LTI does not mean unlimited borrowing. NatWest has tightened LTV caps on some products, which could affect deposit requirements. Factor these into your cash flow and investment plans.

4. Plan Financing Workflows: If you plan to buy or refinance, start conversations early with mortgage advisers to navigate new criteria efficiently. This is particularly important if you manage multiple properties or complex portfolios.

5. Benchmark Locally: Mortgage lending criteria can vary by lender and region. If NatWest is your main lender, this change is directly relevant, but check other lenders’ policies as well to ensure you are comparing options effectively.

Next Conversations to Schedule

• Mortgage Broker Meeting: To explore updated borrowing limits and product availability.
• Financial Advisor Consultation: To assess the impact on your portfolio’s financing structure.
• Tenant Screening Review: With your letting agent to align rent levels and affordability checks with your mortgage cost changes.

How Rentals & Sales Can Support You

Our team offers portfolio reviews, compliance audits, and tailored pricing strategies that reflect current mortgage market conditions. We can help you:

• Understand how NatWest’s updated LTI affects your borrowing options.
• Review your tenant affordability processes in light of financing changes.
• Optimise your investment strategy with a clear view of cash flow and borrowing capacity.

Contact us to schedule a consultation and ensure your landlord operations remain financially robust amid evolving mortgage lending criteria.

Disclaimer: This article provides general information and does not constitute financial advice. Landlords should seek personalised advice from qualified mortgage brokers or financial advisors before making investment decisions.