Decide Whether to Overpay Your Mortgage or Save the Cash

Everyone has an opinion on this and most of them ignore your actual interest rate. Plug in your mortgage rate, your best savings rate, and what you can spare each month, and get a straight comparison plus the non financial catches worth thinking about first.

Compare overpaying a mortgage against putting the same money into savings or investments instead, using these figures: mortgage interest rate {MORTGAGE_RATE}, best available savings or investment return {ALTERNATIVE_RATE}, and monthly amount available {MONTHLY_AMOUNT}.

Explain in plain English which option comes out ahead purely on the numbers, then note the non financial factors that could change the answer: how much flexibility matters to you, whether you already have an emergency fund, and any early repayment charges on the mortgage. Do not give regulated financial advice, just lay out the trade off clearly and end with a one line steer based on the numbers alone.