Owning your own home

Edit: I am not a financial advisor. Do your own calculations.

Essentially no, since when your mortgage fix comes to an end you should be able to pay off whatever you like without any penalty charges (OK you might need to switch to the SVR for a few days or something).

Then again you've probably not earnt enough in interest to get you anywhere near the penalty-free overpayment limit.

This all assumes that your mortgage interest compounds in the same way as your savings interest. Usually this is daily I think, but I usually find it very hard to find it stated clearly.

Edit 2: Also standard payments go against interest+capital unless you have an interest-only mortgage, which you probably don't.

Interest is applied to capital, so you're trading accruing more debt at (say) 2% vs earning more cash at (say) 3%. Since you can pay debt with cash, you should choose the option that lets you accrue cash at a faster rate than you are accruing debt. Just remember the cash is already earmarked for your mortgage so don't go spending it unless you have an emergency.

There's no tax on payments to your mortgage but there is potentially tax on your interest income, which could of course affect where the break-even point sits.

Edit 3: It's almost certainly better to contribute additional payments to your pension than do any of this.