Offset mortgages can be a great way to save money. They can either help you reduce your monthly payments, or shorten the term and help you get mortgage-free sooner.

But so many of us don’t understand them – and some don’t even know they exist – which is a crying shame, because those not considering an offset mortgage are potentially missing out on £1,000s in savings.

How offset mortgages work
Offset mortgages are a type of product that let you link your mortgage to your savings.

The savings balance is used to reduce the amount of interest charged on the mortgage. Your savings will be ‘offset’ against the value of your mortgage, and you’ll only pay interest on your mortgage balance minus your savings balance. Your savings don’t actually repay any of your mortgage, they just sit alongside it and save you interest. It works something like this:

An example:
You have a mortgage of £100,000. You’re paying an interest rate of 3.00%.

You also have £10,000 in a savings account. By offsetting the £10,000 savings you only pay interest on £90,000 of your mortgage.

Over the course of the year, this can save you up to £300.

If you’d have left these savings in a savings account paying 2.00% (a pretty decent rate at the moment), you would have earned £200 in interest. If you have to pay tax on your interest, it would be even less.

Plus you’d still have to pay that £300 you didn’t save on the mortgage.

Choose between lower payments or a shorter term
With your offset mortgage, you can choose how to benefit from the interest you save:

Lower monthly payments. Your mortgage term remains the same, but you pay back less each month.


A shorter term. Keep your payments the same and you will actually shorten the term of your mortgage!

Don’t believe the offset mortgage myths!
You might have been put off an offset mortgage because you’ve heard it’s more expensive or too restrictive, but the truth is quite different…

You can get at your money quickly – it’s not locked away.

A small amount of savings can make a big difference – a modest pot of £2,500 could shorten a £100,000 mortgage by seven months over a 25-year term!

The mortgage interest rates are not that much higher. Like any financial product, there are more and less competitive rates, so shop around.

You don’t have to have all of your savings in one account. You can have several savings accounts offset against your mortgage – even family members can offset their savings against your mortgage!

Make bigger savings by overpaying or saving more
Once your savings are offset against your mortgage, you can still add to them – more money offset means more interest saved.

Some offset mortgages also allow you to overpay. This will have the same effect of saving you interest, but with one big difference…

Overpaying means you physically repay part of your mortgage – you may lose access to this money if you need it later. Offset savings, on the other hand, remain alongside the mortgage. They don’t repay it, so you still have access to your money.

Offset mortgages can be great for parents helping children get on the property ladder
As opposed to becoming a guarantor, or physically giving your child money towards buying a new home, offset mortgages offer a great alternative.

Some offset mortgages allow family to offset their savings against a relative’s mortgage. The benefits are that:

  • The mortgage holder saves interest while the savings are offset – they can either benefit from lower payments or from a shorter term.
  • The parent retains control and ownership of their money, while helping their child through the expensive early years of home-ownership.
  • Offset mortgages offer a great way for parents to help their child, without physically giving the money to them if they can’t afford to.
  • The parent can then transfer their money into a normal savings account – once the child is ready to take the reins of the mortgage fully.

The pros and cons of offset mortgages
Offset mortgages are a great way to save interest on your mortgage, but there are disadvantages as well:

  • Save more interest than you can earn in a savings account
  • Pay no tax on the interest you save – you may have to pay tax on interest earned on a normal savings account (apart from cash ISAs)
  • Keep easy access to your savings (remember the mortgage payment may go up if you make a withdrawal from your savings)
  • Finish your mortgage sooner, or make lower monthly payments
  • Help a child or relative get on the property ladder
  • Your savings don’t earn interest. So if you rely on your savings for income, offsetting against someone else’s mortgage is not a good idea
  • Your savings will lose their spending power, as they won’t grow

What next?


We are a friendly, helpful team of expert offset mortgage advisors and would love to assist you.