How Does a Capital Repayment Mortgage Work?
With a capital repayment mortgage, your monthly payment is split into two parts: a portion that covers the interest charges on your outstanding balance, and a portion that pays down the capital. Over time, as your balance decreases, the interest portion of each payment reduces and more of your money goes towards paying off the capital.
In the early years of a capital repayment mortgage, the majority of each payment goes towards interest because your balance is at its highest. As you progress through the term, the balance between interest and capital shifts, and in the later years the majority of each payment goes towards reducing the capital.
For example, on a 200,000 pound mortgage at 4.5% over 25 years, your monthly payment would be approximately 1,111 pounds. In the first month, around 750 pounds of that payment would go towards interest and 361 pounds towards capital. By the halfway point, the split would be roughly equal, and in the final years, almost the entire payment would be reducing your balance.
This structure guarantees that your mortgage will be fully repaid by the end of the term, provided you make all your payments. This certainty is one of the key advantages of a capital repayment mortgage over an interest-only arrangement, where you are responsible for having a separate plan to repay the capital.
It is worth noting that if your interest rate changes, either because you are on a variable rate or because you remortgage to a new deal, the split between interest and capital will adjust accordingly. A lower rate means more of each payment goes towards capital, helping you pay off your mortgage faster.
Switching From Interest-Only to Capital Repayment
Many UK homeowners who are currently on interest-only mortgages are looking to switch to capital repayment. This might be because their lender has requested a switch, because their repayment vehicle has underperformed, or because they simply want the security of knowing their mortgage will be paid off.
Switching from interest-only to capital repayment will increase your monthly payments, as you will now be paying off the capital as well as the interest. The size of the increase depends on your remaining balance, the interest rate, and the term length.
For example, on an interest-only mortgage of 200,000 pounds at 4.5%, your monthly payments would be 750 pounds. Switching to capital repayment on a 25-year term at the same rate would increase payments to approximately 1,111 pounds, an increase of 361 pounds per month. If you extended the term to 30 years, the payment would be around 1,013 pounds, reducing the increase to 263 pounds.
Lenders will assess whether you can afford the higher payments before approving the switch. If the increase is too large for your current income, extending the term can bring payments closer to an affordable level. Some lenders also offer part-and-part arrangements where a portion of the mortgage is on repayment and the remainder stays on interest-only.
If you are being asked to switch by your existing lender, it is still worth comparing deals across the market. Your current lender may offer a product transfer, but a different lender might offer a better rate or more favourable terms that make the transition more affordable.
The transition to capital repayment is a significant financial commitment, but it provides the invaluable benefit of gradually eliminating your mortgage debt. Many homeowners find that the peace of mind this brings outweighs the impact of higher monthly payments.
Capital Repayment vs Interest-Only: A Detailed Comparison
Understanding the differences between capital repayment and interest-only mortgages is essential for making the right choice when remortgaging. Each has distinct advantages and drawbacks that suit different circumstances.
Monthly payments. Interest-only payments are significantly lower because you are only paying the interest charges, not reducing the balance. On a 200,000 pound mortgage at 4.5%, interest-only payments would be 750 pounds per month compared with 1,111 pounds on a 25-year repayment mortgage. However, at the end of the term, you still owe the full 200,000 pounds on interest-only.
Total cost. A capital repayment mortgage costs less overall because your balance reduces throughout the term, meaning you pay less interest in total. On the same mortgage, total interest on a 25-year repayment would be approximately 133,400 pounds. On interest-only over 25 years, you would pay 225,000 pounds in interest and still owe the original 200,000 pounds.
Equity building. With capital repayment, you build equity with every payment. After ten years on the 25-year example above, you would have paid off approximately 68,000 pounds of your balance. With interest-only, your balance and equity position remain unchanged unless your property value increases.
Risk. Capital repayment is lower risk because the mortgage is guaranteed to be paid off by the end of the term. Interest-only carries the risk that your repayment strategy may not perform as expected, potentially leaving you unable to repay the capital. This is a significant concern that has affected many homeowners in the UK.
Flexibility. Interest-only offers lower compulsory payments, which can be advantageous for borrowers with variable income or those who want to invest the difference elsewhere. However, this flexibility requires discipline and a reliable investment strategy.
For most homeowners remortgaging today, capital repayment is the recommended approach. The security of knowing your mortgage will be fully repaid, combined with the equity you build along the way, generally outweighs the appeal of lower interest-only payments.