$50 a month is not impressive. $50 a month for forty years is.
Saving is for money that must stay stable or may be needed soon. Investing accepts uncertainty in exchange for possible long-term growth. The mechanism that makes investing worth the uncertainty is compounding — your money earns a return, and then that return earns a return too.
- Saving: stable, available, low growth. For goals and buffers.
- Investing: uncertain, long term, no guaranteed return. For years you can wait out.
- The one input a teenager has that adults do not is time.
Guess before you see it
$50 a month from 16 to 65 at a 6% average return. You contribute about $29,400. What is the ending balance?
Pick one — guessing first is the point.
Move the numbers yourself
The dashed line is only what you contributed. The green line is your total. The bar underneath splits your money from the growth.
Returns are never this smooth in real life. The shape of the curve is what matters, not the exact ending number.
76% of that total is growth you did not earn at a job.
Quick check
Answering every check in this lesson completes it automatically.
Same amount, ten years apart
Two cousins, identical monthly contributions, both stopping at 65.
Contributed $29,400 of their own money.
Contributed $23,400 of their own money.
Devin contributes $6,000 more than Priya and finishes $84,569 ahead. The difference is time, not discipline.
Save it or invest it?
The deciding question is always: when will I need this money?
- Rent deposit needed in four months
- Money you will not touch for twenty years
- Your $300 emergency buffer
- $25 a month you can genuinely leave alone
- Concert fund for the summer
The four things nobody selling you an investment says first
Tap each one.
Check your understanding
Answering every check in this lesson completes it automatically.
Where this money would actually sit in Canada
Compounding is not a product you buy — it is what happens inside an account that earns a return. In Canada, a Tax-Free Savings Account is the account most people use for long-term growth, because growth inside it is not taxed.
- A Canadian resident generally must be at least 18 with a valid SIN to open a TFSA.
- In provinces where the contract age is 19, you may need to wait until 19, while contribution room from 18 carries forward.
- Before then, a regular savings account or a parent-held account still lets the habit start. Never misrepresent your age or use someone else's identity.
Two cousins, ten years apart
Devin starts putting $50 a month into a long-term investment at 16. His cousin Priya waits until 26 and contributes the same $50 a month. Both stop at 65. Priya asks what she should do.
Run your own numbers
Set a contribution and a horizon in the Compound Growth tool and watch the split between your money and the growth.
One more
Answering every check in this lesson completes it automatically.
Small amounts plus a long time beats large amounts plus a short time. Starting is the whole advantage.
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