Increasing numbers of homeowners are taking out long-life mortgages that may even run into their pension years, to boost their borrowing power.
But while doing so will reduce their monthly payments now, it could land them more than £100,000 extra interest, as our mortgage cost calculator shows.
The days of the 25-year mortgage being standard have long gone and many first-time buyers and home movers are now taking on 30, 35 and even 40-year mortgages.
Extending the term helps borrowers lower monthly payments to meet affordability criteria but over the lifetime of the mortgage they will pay much more in interest.
For example, a £200,000 mortgage with an average rate of 5 per cent over 25 years will cost £150,754 in interest, but over 35 years it would be £224,000 and over 40 years a borrower would see £262,909 in interest charges rack up.
Our calculator lets you compare the true cost of rival mortgages and shows how much more interest you would pay with a 40-year mortgage than a 30-year or 25-year home loan.
Compare true mortgage costs
Work out mortgage costs and check what the real best deal taking into account rates and fees. You can either use one part to work out a single mortgage costs, or both to compare loans
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Calculator note:The calculator is for a repayment mortgage where interest is calculated monthly, costs will be different for loans with daily or annual interest. The results also apply to daily interest where only one payment is made per month.
Mortgage rates have risen substantially over recent years, meaning that those remortgaging or buying a home face higher costs.
That makes it even more important to search out the best possible rate for you and get good mortgage advice, whether you are a first-time buyer, home owner or buy-to-let landlord.
Quick mortgage finder links with This is Money's partner L&C
You can compare fixed rate lengths, from two-year fixes, to five-year fixes and ten-year fixes.
If you’re ready to find your next mortgage, why not use This is Money and L&C’s online Mortgage Finder. It will search 1,000’s of deals from more than 90 different lenders to discover the best deal for you.
Mortgage service provided by London & Country Mortgages (L&C), which is authorised and regulated by the Financial Conduct Authority (registered number: 143002). The FCA does not regulate most Buy to Let mortgages. Your home or property may be repossessed if you do not keep up repayments on your mortgage.
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Long-life mortgage calculator: How much will it REALLY cost you?