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Switching from Interest-Only to Repayment Mortgages

Learn how to switch from an interest-only mortgage to a repayment mortgage and consolidate debt effectively.

By David Sampson
4 June 2026
3 min read
UK remortgage article image for Switching from Interest-Only to Repayment Mortgages

TL;DR

  • Homeowners can transition from an interest-only mortgage to a repayment mortgage when remortgaging.
  • this allows for debt consolidation, but lenders will assess affordability and may stretch terms.

Written by David Sampson for Mortgage118. Last updated 4 June 2026. Reviewed against our editorial standards. Editorial standards. Mortgage118 is a directory — not FCA-authorised and not a mortgage adviser.

Switching from an interest-only mortgage to a repayment mortgage can provide homeowners with a more structured approach to paying off their debt. This change is particularly important for those looking to consolidate additional debts while ensuring their mortgage is paid off by the end of the term.

Can You Switch from an Interest-Only Mortgage?

Yes, homeowners can switch from an interest-only mortgage to a repayment mortgage during the remortgaging process. This shift is essential for those who want to ensure their mortgage balance is cleared by the end of the loan term. The process typically involves a thorough assessment of the homeowner’s financial situation, including income, employment type, and existing financial commitments.

What Factors Do Lenders Consider for Interest-Only Mortgages?

When considering a switch to a repayment mortgage, lenders will evaluate several factors:

  • Loan-to-Value (LTV) ratio: Homeowners looking to borrow against a property valued at £170,000 with an outstanding balance of £95,000 would be at an 85% LTV, which is acceptable for most lenders.
  • Affordability assessment: Lenders will review household income, employment status (whether employed, self-employed, or on contract), and regular financial commitments such as loans and childcare costs.
  • Stress testing: Lenders will assess household costs against higher interest rates to ensure borrowers can manage repayments.
  • Mortgage term: If affordability is tight, extending the mortgage term may be an option to lower monthly payments.

What Does Debt Consolidation Mean for Interest-Only Mortgages?

In this context, debt consolidation refers to the strategy of adding an additional £50,000 to the mortgage to pay off existing loans and credit cards. While this can simplify finances by consolidating multiple debts into one monthly payment, it is important to note that homeowners may end up paying more interest over time, as the debt is stretched across the mortgage term.

What This Means for Homeowners

For homeowners looking to switch from an interest-only to a repayment mortgage, this change can provide financial relief and a clearer path to owning their home outright. However, it is essential to consider the implications of debt consolidation, as it may lead to higher overall interest payments. Homeowners should carefully assess their financial situation and consult with mortgage experts to understand the best options available. For more information on mortgage options, consider using a mortgage calculator.

Frequently Asked Questions

Can I switch my interest-only mortgage without penalties?

Switching may incur penalties depending on your current mortgage terms. It’s advisable to check with your lender about any potential fees.

How will my credit score be affected by remortgaging?

Remortgaging can impact your credit score, especially if you apply for multiple loans in a short period. Maintaining good financial habits can help mitigate any negative effects.

About David Sampson

David Sampson writes about the UK mortgage market for Mortgage118, covering specialist lending, market trends, and practical advice for borrowers. All content is reviewed for accuracy against FCA guidelines and current market data.