Investing term
What is Inflation?
The gradual loss of purchasing power over time. $100 buys less each year.
Inflation is the gradual rise in the general level of prices, which means each unit of your money buys a little less over time. At a typical 2–4% a year it feels invisible day to day, but it compounds like interest in reverse — over a few decades it can halve what a fixed sum of cash will buy.
Inflation is the quiet reason investing isn't optional. Money left in a low-interest account doesn't just fail to grow; it actively loses real value every year prices rise faster than it earns. To simply stay even you need a return at least equal to inflation, and to build wealth you need to beat it.
At 3% a year, the buying power of $100 falls to about $74 over a decade. The dollars are unchanged; what they can buy quietly shrinks.
For example
At 3% inflation, $100 today buys only about $74 worth of goods in ten years — cash that just sits there is quietly getting poorer.
Learn it by doing
That's Inflation in theory — it clicks when you use it. Practise it hands-on in a free, interactive lesson (Stage 1, Money, Goals & Your Financial Foundation).
Try the free lesson →Why it matters to you
Inflation reframes what "safe" means: cash feels risk-free because its number never drops, yet it's guaranteed to lose buying power whenever it earns less than prices rise. That makes doing nothing a slow, certain loss — the opposite of safe. It's also why long-term returns should always be judged after inflation, and why assets that tend to grow with the economy, like stocks, are the usual defence against it.
⚠ Cash feels safe but silently shrinks
The figure in a savings account never falls, so it feels like the safest possible place. But if it earns 1% while inflation runs 3%, you're losing 2% of real buying power a year with total certainty. "Safe" in nominal terms can mean a guaranteed loss in real terms — the risk is just harder to see.