I'm saddened to see so many people think that overpaying their mortgage was their best financial decision. If you're comparing it to
spending the money instead, then sure, well done, great decision. But you could have done so much better.
Let's say that at the beginning of 2010, Amy, Becca and Caroline each take out a £200,000 mortgage at 2% for 25 years, giving them an £848 monthly payment, when they'd all budgeted for £1,000 a month.
- Amy just repays the £848 and spends her spare £152.
- Becca sets her mortgage repayment to £1,000, overpaying £152 a month at first, although the overpayment gets bigger and bigger as the mortgage balance shrinks.
- Caroline just repays the £848, but puts her spare £152 a month into a stocks and shares ISA.
Fast forward to today, and that's a bit over twenty grand of £152s. Amy still has a mortgage balance of £122,000, while Becca's is down to £99,000. Amy has nothing to show for her twenty grand, while Becca is not only twenty grand closer to paying off her mortgage but has also saved £3,000 in interest payments, so she's £23,000 better off than Amy and saving more every month. Well done Becca.
Caroline also still owes £122,000 on the mortgage, and hasn't saved any interest. However, she has £47,000 in her ISA now*. Instead of using that twenty grand to save £3K in interest, she's used it to earn another twenty grand, and then some. Earning interest is exactly the same as avoiding paying interest, so not only is she £24,000 better off than Becca, she's saving more every month.
Now, a word of caution. The stock market is volatile. You might lose money. The last decade has been a good one for shares, and the next one probably won't be as good. But volatility is a short term thing. Over a long enough period of time, the stock market has historically always given you a decent return - and the fact we're comparing to the length of a mortgage means we're talking about a long enough time period for that to be a reasonable assumption. As a long-term average, shares earn you about 10% a year, so that's what you're giving up when you choose to overpay your mortgage to save what's probably less than 2% a year in interest.
- For the curious, I've used the S&P 500 as my benchmark for this, simply cos that was easy to find data on.