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Interest only calculator

The calculator below will help you to compare the cost of your mortgage on repayment or interest only methods or a combination of the two - Part and Part. This may help you to understand if your repayment strategy will be sufficient to repay the remaining balance off at the end of the mortgage term.

Types of mortgages

Interest only mortgage

With an interest only mortgage, the monthly payments over the term of the mortgage cover only the interest charged on the amount borrowed. This means that the interest only part of your mortgage, together with any fees or charges debited to your account, will be owed in full at the end of the term. It is entirely your responsibility to ensure that at the end of the term the remaining balance on your mortgage is repaid in full by your repayment strategy. The maximum term for interest only is 25 years.

Repayment mortgage

With a repayment mortgage the monthly payment you make covers both the interest charged and a portion of the original amount of money you borrowed. Providing you make all payments including any fees or charges when due, the loan will be repaid at the end of the term. The maximum term for a repayment mortgage is 40 years.

Part and Part 

This is a combination of both repayment and interest only mortgage. For example, a loan of £50,000 could be made up of £30,000 repayment and £20,000 interest only, so there would be a remaining capital balance of £20,000 to repay at the end of your mortgage term. The maximum term for Part and Part is 25 years.

Interest Only / Repayment comparison calculator

Input your mortgage details below and click the calculate button. Then move the slider to see how your payments would change if the Interest only amount was increased or reduced

Please note: so we can show a full % on repayment or interest only, the amount entered in 'interest only amount' may increase


Interest only:

Your approximate monthly payment would be: £349

Remember that in addition to the approximate payment shown you will have to repay the remaining balance off at the end of the mortgage term for any part of the mortgage on an interest only method. You need to ensure that your repayment strategy for this part of the loan is adequate.

This information provides an approximate indication of costs. Full details are available from the Society and when you apply for any of the above options.

This information does not contain all of the details you need to choose or vary a mortgage. Make sure that you read the separate Mortgage Illustration (MIL) or mortgage offer before you make a decision.

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Repayment options

If you are an existing customer and you have any concerns about repaying the remaining balance by the end of the mortgage term, a range of options may be open to you, including:

  • Conversion of the mortgage to a repayment mortgage
  • Conversion to a Part and Part mortgage
  • Extension of the term of the mortgage, together with one of the above
  • Repayment of lump sums to reduce the remaining balance
  • Regular overpayments to reduce the remaining balance gradually. See the Flexible Payments Calculator.
  • Switching to a new product with lower monthly payments in conjunction with any of the above. An illustration of the new product will be provided to you and will be subject to availability and current lending criteria. There may be fees payable for certain products

Any changes will be subject to the terms and conditions of your existing mortgage including any Early Repayment Charges, if applicable, and our current lending policy. Please refer to your original mortgage offer for details or contact us.

Please call our Mortgage team on 0345 607 9825 to discuss the options which are available to you with Skipton.

Helpful information regarding interest only mortgages, including budget calculators, is also available from the MoneyHelper website.

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