What is an Offset Mortgage?

What is an Offset Mortgage?

An offset mortgage is a type of mortgage that allows you to link your mortgage with your savings or current account. This unique feature has the potential to reduce your monthly mortgage repayments by lowering the total interest you’ll be charged each month. 

Here, we will delve into the workings of an offset mortgage, its advantages, disadvantages, and factors to consider before choosing this financial product.

Introduction to Offset Mortgages

Offset mortgages provide borrowers with a way to optimise their mortgage repayments by utilising their savings. Unlike traditional mortgages, where interest is charged on the entire loan amount, offset mortgages work by “offsetting” the balance you owe on your mortgage against the funds available in your savings account. 

Essentially, the amount in your savings account is deducted from your mortgage debt, and you only pay interest on the remaining balance. This approach can result in significant interest savings over the life of your mortgage.

How Offset Mortgages Work

The mechanism behind offset mortgages is relatively straightforward. Let’s say you have a mortgage of £200,000 and savings of £50,000 in an offset savings account. The lender will subtract the £50,000 from your mortgage debt, leaving you with a remaining balance of £150,000. 

Consequently, you’ll only pay interest on the £150,000 instead of the full £200,000. This reduction in the outstanding balance leads to a decrease in the interest charged, potentially saving you a substantial amount over time.

Advantages of Offset Mortgages

Offset mortgages offer several advantages that make them an attractive option for homeowners:

Interest Savings

With an offset mortgage, you have the opportunity to save more on interest than you would earn in a regular savings account. By reducing the outstanding balance, you effectively reduce the interest charged, resulting in substantial long-term savings.

Tax Benefits

The interest you save through an offset mortgage is tax-free, unlike the interest earned on traditional savings accounts. This tax advantage can further enhance the overall cost savings of an offset mortgage.


Offset mortgages provide flexibility in terms of accessing your savings. You can deposit or withdraw funds from the linked savings account without any penalties, allowing you to maintain liquidity and easily manage your finances.

Disadvantages of Offset Mortgages

While offset mortgages offer several advantages, it’s essential to consider the potential drawbacks before making a decision:

Foregone Interest

By using your savings to offset your mortgage, you sacrifice the interest you could have earned in a regular savings account. This trade-off should be carefully evaluated, weighing the interest saved against the interest that could have been earned.

Alternative Uses of Savings

Instead of using your savings for an offset mortgage, you might consider utilising them for a larger deposit. This can lead to a lower mortgage amount and potentially secure a more favourable interest rate.

Possibility of Higher Interest Rates

Offset mortgages may come with slightly higher interest rates compared to traditional mortgages. However, with a larger deposit, you might be able to negotiate lower interest rates, reducing your monthly mortgage payments.


Offset mortgages are a unique option for homeowners who have considerable savings but don’t want to use those savings for a larger deposit. While a larger deposit reduces your total mortgage amount, using those savings to get a reduced-interest mortgage can be a good option if you want to use your money for other things such as home improvements. 

It is important to remember however, that savings used in an offset mortgage will not earn any interest, so you will need to assess whether the savings made in mortgage repayments will be worth the interest you would have otherwise gained from your savings.

If you think an offset mortgage might be right for you, please contact us to see how we can help find you the best deal.