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For example, if you have an outstanding mortgage of £100,000 and savings of £10,000, you would only pay interest on a mortgage of £90,000. And because you're using your 1st Account and day-to-day savings account balances excluding the e-Saver Account and the Regular Saver Account to reduce the amount you owe on your mortgage, rather than earning credit interest, there's no tax to pay.
The amount of interest you pay each month is likely to vary, as it's linked to your fluctuating balances.
You can also transfer other borrowing into an account linked to your mortgage. Or you can redraw capital at any time, up to 80% of the value of your property. This will increase your interest payments and could increase the time it takes to pay off your mortgage. Any borrowing linked to your offset Mortgage will also be secured against your property.
You must, however, ensure that your monthly interest payments are met, and where the amount of the loan is higher than 80% of the property value, both capital and interest must be paid.
Think carefully before securing other debts against your home. Your home may be repossessed if you do not keep up repayments on your mortgage.