Repayment Types: What is a repayment mortgage?

A repayment mortgage is designed so that, over the agreed term, your monthly payments reduce both:

• the interest charged on the loan, and
• the capital (the amount you borrowed).

If you make the payments as expected throughout the mortgage term, the mortgage balance is intended to be repaid in full by the end of the term.

Repayment mortgages are the most common choice for people buying a home to live in.

Related guides:

• Compare repayment, interest-only and part-and-part mortgage types
• Read the interest-only mortgage guide

Your home may be repossessed if you do not keep up repayments on your mortgage.

How does a repayment mortgage work?

Each month your payment is split into two parts:

1. Interest, the cost of borrowing.
2. Capital repayment, the part that reduces what you owe.

At the start of a repayment mortgage, a larger proportion of your monthly payment usually goes towards interest. As time passes, the balance you owe falls, so the interest portion typically reduces, and more of your payment goes towards repaying capital.

This is why repayment mortgages are often described as being “front-loaded” with interest: the earlier years generally feel heavier, but the mortgage balance steadily declines.

Interest calculation and repayment timing

Interest is generally calculated based on the outstanding mortgage balance. In many mortgage contracts, interest accrues on a daily basis, which can affect how the balance changes when payments are made.

When comparing mortgage options or planning extra payments, it can help to understand:

• how interest is calculated under the mortgage terms
• when changes to the balance take effect
• how the lender applies lump-sum payments (if allowed)

What are the types of repayment mortgage?

The term repayment mortgage refers to how the loan is repaid (by reducing capital over time). However, you’ll also need to consider the interest rate type, because that affects how your payments behave.

Common interest rate structures include:

• Fixed rate: your interest rate is set for an agreed period (often a few years). Payments are usually more predictable during the fixed term.
• Standard Variable Rate (SVR): the lender’s rate when no special discount applies. It can change over time.
• Tracker rate: linked to a reference rate (commonly the Bank of England base rate) plus or minus a margin. Your rate can move as the reference rate moves.
• Discounted rate: set below the lender’s SVR for a period, then typically reverts to the SVR.
• Capped rate: a variable rate with a limit on how high it can go.

These are not different “repayment methods”, but they can affect the cost and stability of your monthly outgoings.

What’s the difference between repayment and interest-only mortgages?

The key difference is what happens to the capital.

Repayment mortgages

• Your monthly payments include both interest and capital.
• The mortgage is intended to be cleared by the end of the term.

Interest-only mortgages

• Your monthly payments cover interest only.
• The capital must be repaid at the end of the term (for example, by selling the property, or using a separate repayment plan).

Because interest-only payments are often lower at the start, they can appear attractive. However, they carry additional planning risk: you need a credible way to repay the capital when the mortgage term ends.

Can I change from repayment to interest-only?

In some circumstances, it may be possible to move from a repayment mortgage to an interest-only arrangement. This typically involves a lender decision and may require a new mortgage arrangement.

Two common scenarios are:

• Changing at a point where you can remortgage (for example, when your current deal ends).
• Requesting a temporary change if your financial situation is under pressure.

Whether a change is available, and what it would cost, depends on your lender, your mortgage terms, and your circumstances at the time.

Risks to understand with repayment mortgages

Repayment mortgages are often viewed as “simpler” because the balance reduces over time. However, they still have risks.

• Higher monthly payments: Because repayment mortgages include capital repayment, monthly payments are typically higher than interest-only. If your income changes, this can affect affordability.
• Paying off the mortgage may take longer than expected: If you make only the minimum payments and your mortgage term is extended or you switch products later, the overall cost and timeline can change.

Overpayments: paying more to reduce the balance faster

Many repayment mortgages allow overpayments (extra payments above your normal monthly amount), though the rules vary by lender and product.

If overpayments are permitted, they may:

• reduce the outstanding balance sooner
• potentially reduce the total interest paid over the life of the mortgage
• help you reach your repayment goal earlier (subject to the mortgage’s overpayment rules)

Overpayments may be available as:

• regular overpayments (for example, increasing monthly payments)
• one-off lump sums

Whether you can overpay, and how the lender applies those payments, depends on the mortgage agreement.

Early Repayment Charges (ERCs) to consider

If you plan to overpay heavily or repay the mortgage early, it’s important to check whether Early Repayment Charges (ERCs) apply.

ERCs may be triggered if you:

• repay more than the permitted overpayment limit
• make lump-sum repayments during a restricted period
• repay the mortgage in full within an ERC window

Because ERCs can affect the overall benefit of paying extra, review the mortgage’s overpayment and early repayment terms before making changes.

Factors to consider when choosing a repayment mortgage

When comparing repayment options, it’s helpful to look beyond the headline monthly figure and consider:

• Mortgage term: longer terms can reduce monthly payments, but may increase total interest paid.
• Interest rate type: fixed vs variable affects how predictable your payments are.
• Affordability over time: especially if you’re considering variable rates or a deal that will end in the future.

Using a repayment mortgage calculator

A repayment mortgage calculator can help you estimate how your monthly payments might change based on different inputs such as:

• the loan amount (or borrowing)
• the interest rate
• the mortgage term

This can be useful for comparing options and understanding how changes in rate or term may affect affordability.

Summary

If you’re deciding between repayment and interest-only, the main question is whether you want your payments to steadily reduce the balance now (repayment) or whether you’re comfortable planning how the capital will be repaid later (interest-only).