29/09/2026
This is one of those questions where I’d normally need quite a bit more information before I gave you an answer, but let’s use the example in the video to explain why.
You’re buying a £300,000 property with a £30,000 deposit, so you’d be borrowing £270,000 at a 90% loan-to-value. You’ve got another £10,000 available and you’re trying to decide whether to increase your deposit or pay off some existing debt.
If you add the extra £10,000 to the deposit, you reduce the mortgage to £260,000 and your loan-to-value would come down to around 86.7%. That’s obviously less money to borrow, which is a benefit in itself, but you haven’t reached 85% LTV so you’re unlikely to open up the next band of mortgage products.
Now let’s consider the debt. This is where I would want to know exactly what that £10,000 consists of. If clearing it removes a £300 monthly loan payment for example, that could make a meaningful difference to the lenders affordability calculation. Depending on how tight affordability is, that might be far more useful to this particular buyer than moving from 90% to 86.7% LTV.
But change the numbers slightly and my advice could change with them.
If that £10,000 took you into a new LTV band for example, we’d want to explore what products opened up and what impact they would have on the mortgage overall. Equally, if the debt had a relatively small monthly commitment and wasn’t restricting affordability, clearing it might not achieve much from a mortgage point of view.
And then there’s the part we haven’t talked about yet: what money are you leaving yourself with afterwards? I wouldn’t automatically recommend putting every available penny into either the deposit or clearing debt without looking at the costs of buying, moving and what you’ll have left as a buffer once you’ve got the keys.
If you’re looking at this and trying to apply the same logic to your own figures and circumstances, that’s where I’d be careful. A different property price, deposit, LTV, debt or monthly commitment could lead to completely different advice.