One of the things I keep coming back to is how to explain the impact of compounding in a way that actually lands. Most people have heard about compounding and know it is important, but most just do not really comprehend it.
Numbers on a spreadsheet don’t do it.
The simulator below is built around one simple idea: time is worth more than the amount you save. Put away £200 a month from age 25, and you will have close to £1 million by the time you retire.
The diamond markers show the moment that’s hardest to grasp intuitively: the point where the interest you’ve earned exceeds the money you actually put in. At 9%, that happens at age 39 — just 14 years in. At 4% (roughly the current UK treasury bill rate), it takes until age 57. At that point, the interest itself is working harder than you!!! (This is the actual secret that 99% of people do not grasp despite the fact that it is in EVERY publication about financial management.)
Toggle the savings grow +3%/yr switch to see what happens when your contributions increase a little each year alongside your salary and start compounding themselves. The curves lift dramatically — compounding on top of compounding.
The takeaway: start early, be consistent, and let time do the heavy lifting.
And the subtle addition: if you are not going to save for long, don’t bother, you’re just wasting your time….
