Borrowing more at remortgaging point
I do not have a finance brain, so please explain like I'm a child.
My partner helped me with my deposit (we own separate properties). He said I can pay him some back each time I remortgage. I don't mind that in principle but I don't really understand. My total mortgage length is 29 years. Current mortgage deal is 2 years, by which time I'll have paid like 50p (well, OK, £4k) off my capital. I don't see why the bank would lend me more when the house won't be worth much more, I won't have paid much off, so I wont have much capital to release or however it works. He says my loan to value will be better because I'll have more of a deposit. I still don't see how I'll have more than a few hundred quid difference. I think I'm more likely to be able to leave him a lump sum when I die in a determined but ill-thought-through DIY project...
He earns a lot more than me and had a huge deposit for his current house, so I feel like he's forgotten how little capital is paid off in 2 years. Also I think the last time he actually needed to remortgage to pay for something was when banks had a very different view on things like that. Is he right? If so can anyone explain to me why?
For the record I have no problem paying him back and as he is well off, it's more principle than need so he's not asking for it, it was the general agreement we reached. He also knows my car is on its last legs and that the kitchen desperately needs replacing (ex rental, say no more) and is happy for me to pay for those beforehand, which again he says can be done at remortgaging point. And again I don't see how.