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Switching from Interest-Only to Repayment Mortgage Explained

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

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

TL;DR

  • Homeowners can convert their interest-only mortgage to a repayment mortgage while consolidating debt.
  • lenders typically allow up to 85% loan-to-value (LTV) for such remortgages.

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 is a viable option for homeowners looking to consolidate debt. This transition can help borrowers manage their finances more effectively, especially if they are also looking to pay off existing loans and credit cards.

Can I switch from an interest-only mortgage to a repayment mortgage?

Yes, homeowners can switch from an interest-only mortgage to a repayment mortgage when they remortgage. This process involves assessing various factors, including the property’s value and the outstanding mortgage balance. For example, if your home is valued at £170,000 with an outstanding balance of £95,000, you can borrow an additional £50,000 for debt consolidation.

What factors do lenders consider for interest-only mortgages?

Lenders evaluate several criteria when considering a switch from interest-only to repayment mortgages. Key factors include:

  • Loan-to-Value (LTV): Your LTV will be approximately 85% based on the provided figures, which is acceptable to most lenders.
  • Affordability: Lenders will assess household income, employment status, and regular financial commitments to determine repayment capability.
  • Mortgage Term: The new mortgage term will be structured to ensure that the mortgage is fully repaid, often requiring a longer term if affordability is tight.

What does debt consolidation mean for interest-only mortgage holders?

Debt consolidation involves adding existing loans and credit card debts to your mortgage. While this can simplify your finances by combining multiple payments into one, it’s important to consider that you may end up paying more interest over a longer period. This is because the debts are stretched across the mortgage term, which could extend the repayment duration significantly.

What this means for homeowners switching from interest-only mortgages

For homeowners looking to switch from an interest-only mortgage, this option can provide a pathway to better financial management. However, it’s essential to carefully evaluate your financial situation and consult with a mortgage advisor to understand the implications fully. If you’re considering remortgaging, tools like a mortgage calculator can help you assess your options and make informed decisions.

Frequently asked questions

Can I switch to a repayment mortgage if I have bad credit?

Switching to a repayment mortgage with bad credit can be challenging, but some lenders specialize in adverse credit cases. It’s advisable to seek advice from a mortgage broker familiar with your situation.

Will switching to a repayment mortgage increase my monthly payments?

Yes, switching to a repayment mortgage typically results in higher monthly payments compared to an interest-only mortgage, as you will be paying down the principal amount as well as interest.

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.