It is always worrying doing this stuff on your own, but based on a very rough “back of an envelope” calculation, I genuinely think you should be fine — even if rates are quite a bit higher next year.
First, this is almost a year away, so you’re thinking about it with loads of notice. Secondly, I think you’re actually in a much stronger position than you realise: you’ve got a very good salary, you’re already saving each month, and you’re in the fortunate position of having the £50k available if you need/want to use it against the mortgage.
Very roughly, from what you’ve told us:
- Mortgage now = £280k at 2.7%, fixed until August 2027.
- That’s about £630/month in interest. As you’re paying £1,000/month, roughly £370 is currently going towards the capital.
- By next August you should therefore have knocked another c.£4,070 off the mortgage.
- You’re also saving £350/month, so another c.£3,850 by then.
- You think you’ll have another £100/month available next year, which gets you to about £1,450/month. And on a salary of nearly £75k, there may well be another £50 or so you could find if you really needed to.
So, worst-case-ish calculation: take the £280k mortgage, deduct c.£4,070 capital repayments, £50k inheritance and £3,850 savings = mortgage of roughly £222k.
Even if we assume your new mortgage rate is 6% (which is quite a pessimistic assumption), then interest is about 1110/month.
So, if you can afford £1,500/month, you can comfortably cover all the interest AND still repay nearly £390/month of the capital, which I think is actually slightly more capital than you’re paying off now.
Obviously this is only rough maths and we don’t know what mortgage rates/products will look like next August. And you also don’t necessarily have to throw every penny of the £50k at your mortgage, especially if it has emotional attachment to it; you could also keep a bit of an emergency fund for example.
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But, I guess that Im saying is that I really don’t think the numbers suggest you’re heading towards a situation where you suddenly can’t afford your mortgage. Even if you have to switch to a 6% rate, the sums still work.
Youve also got nearly a year to save, plan and adjust things if necessary. Maybe you can use this time to work on your expenses and see if there’s any possibility of further savings? You may surprise yourself. Even cutting £50 spending a month would make a big difference.
Best of luck - I really do think you will be fine.