If you take your savings and overpay your mortgage once a year instead of leaving them invested, what happens to your mortgage, your pot, and your total net wealth — and how does that change with what your savings would otherwise return?
Paid in at the end of each month. Whole pounds.
A bonus or similar, paid in on each anniversary.
% of balance per year, comma separated — one line per rate, up to 10.
% per year, comma separated — each becomes a selectable view, up to 10.
Each line is one investment return rate. Where a line slopes up, overpaying more leaves you wealthier; where it slopes down, the money works harder left invested.