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Mortgage overpayment

kazzymac_2
Posts: 119 Forumite


Hi, I have a 5 year fixed rate mortgage at 1.99% due to end in November 2026 (105k ) and additional borrowing also on 5 year fixed rate at 3.62% due to end in December 2027. (20k)
I have 14 years to run on both.
I am currently overpaying the additional borrowing by £250 to try and clear as much as possible before the fixed rate ends on the basis that this is the highest interest rate.
However I am now thinking that maybe I should be overpaying on the main mortgage now so when the fixed rate ends in 2026 and I have to remorgage, the outstanding balance will be lower as obviously the interest rate will be much higher than I am paying now. At that point I would switch the overpayment to the main mortgage being the higher interest rate of the two mortages.
Is that the correct way to think? Or should I just be putting the overpayment into a saving account at 4 or 5% and pay off a bulk each year. And if so which one?
Thank you for any advice.
2025: 52 wk envelope challenge #8 £334
Vinted sales for 2025 = £45
Surverys 2025 £14.25
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Comments
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Why not put the money into a savings account at 5%, then when your mortgage rate expires, use the money you have saved to pay off a lump sum at the point you choose a new deal. Most lenders allow you to make unlimited overpayments at that point, without even having to drop onto the SVR for a brief time.That assumes your new mortgage rate will be higher than both the savings rate and your "additional borrowing" rate, which it probably will be.1
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£250 a month is £3000 a year, and that's almost like keeping £1500 for a year in savings account (your balance in 1st month is £250, then £500.. and in 12th month £3000).
5% savings of £1500 = £75
3.62% mortgage costs = £54
1.99% mortgage costs = £30
By overpaying either you save £30 or £54, saving account would give you £75.
Most mortgages allow for 10% overpayment each year, you can save into savings account and then pay it in lump sum whenever %>%1 -
Thank you. I think I need to move away from the 'emotional' side of seeing the mortgage decrease each month and realise that I will be able to pay off a little more by saving instead and still pay off the mortgage albeit in a lump sum!
2025: 52 wk envelope challenge #8 £334Vinted sales for 2025 = £45Surverys 2025 £14.250 -
Just keep an eye on savings interest rates. They are starting to trend downwards. Though you're likely to be ok with that plan for awhile, given your mortgage rates0
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Of course you overpay the most expensive debt first.
Now others talk about saving into a regular saver and earning more Interest but don't forget that any Interest over £1000 ( lower rate taxpayer ) or £500 ( higher rate taxpayer ) also gets Taxed !
So say you carry on hitting the more expensive mortgage debt and don't pay any ERC,s then your used to paying X on the main mortgage plus Y on the smaller part plus £250 extra every month !
Now come November 2026 you may find your cheap fix has jumped up by say £250/300 a month.
However you have been overpaying every month so don't notice the increase.
You can then consider where you stand with regard to the 2 parts of the mortgage and review your options.
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