Compound interest = “interest on interest.” Your money earns, then those earnings also earn. Like a snowball that picks up more snow every roll.

Plant a fruit tree. Year 1 it gives 10 apples. Year 2 the tree is bigger, so it makes more than 10 apples.

Leave the apples’ seeds to grow more trees, and the orchard grows faster every year. That “faster” is compounding.

• It turns time into your teammate. The earlier you start, the less you have to save.

• It works for you with savings and investments—and against you with debt.

• Money grows in steps: once per year, or monthly, or daily—depends on the account. Each step adds to your balance, then the next step grows the new balance.

• The growth rate is a percent per year (like 4%, 6%, 7%).

• More frequent compounding (monthly vs. yearly) gives you a little extra.

If you like a simple formula for a single deposit:

Future value ≈ Start × [(1 + rate)^(years)]
Example: $1,000 at 5% for 10 years: 1000 x (1 + 0.05)10 = $1,629. 

For regular monthly deposits, there’s a slightly bigger formula—but you can use any basic calculator or an app. 

1. Pick the right account:
     o Tax-free growth: US = Roth IRA (or Roth 401(k)); Canada = TFSA.
     o Tax-deferred (pay tax later): US = Traditional IRA/401(k); Canada = RRSP.
     o First home in Canada: FHSA (special tax help).
Using these lets compounding work without taxes nibbling each year.

2. Choose a simple investment: a low-fee broad-market index fund/ETF (tracks lots of companies at once). Look for low MER/expense ratio (ideally under ~0.25%). Lower fees = more compounding kept.

3. Automate it: set auto-transfer every payday/month. Even $25/week builds the habit.

4. Reinvest dividends: tick “reinvest/DRIP” so payouts buy more shares automatically.

5. Leave it alone: time is the secret sauce. Avoid pulling money out for random stuff.

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1) One-time deposit (compound vs. simple):
     • Start: $1,000, rate 5%, time 10 years
          o Compound: $1,629
     • Start: $5,000, rate 5%, time 4 years
          o Simple interest total = $6,000
          o Compound total = $6,078 (a bit more, because interest also earns interest)

2) Monthly saving (the real-life move):
     • Save $100/month for 10 years at 7% (compounded monthly)
     → About $17,308 total.
     You put in $12,000; compounding added roughly $5,300.

3) Fees matter (quiet compounding killer):
     • Save $200/month for 30 years
          o At 7% with low fees → about $243,994
          o At 6% (same investment but 1% fee) → about $200,903
          That 1% fee costs you roughly $43,000 over time. Yikes!

4) Inflation check (buying power):
If investments earn 7% and inflation is 3%, your real gain is about 4%. Your account grows fast, but prices rise too. Long-term investing aims to beat inflation.

• Roth IRA / TFSA: You pay tax now, but growth and qualified withdrawals are tax-free. Great for long-term compounding.
• 401(k)/Traditional IRA / RRSP: You delay tax until withdrawal. Good if your tax rate might be lower in retirement.
• Taxable (regular) account: You may owe tax along the way, which slows compounding a bit.

     • Starting and stopping: skipping months breaks the snowball. Small-but-steady beats big-but-random.

     • Chasing hot picks: constant switching can add fees and miss growth.

     • High-interest debt first: a 20% credit card “compounds” against you. Kill that before heavy investing.

     • Ignoring fees: a 1% yearly fee sounds small; over decades it’s huge.

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• Open your banking/investing app and set auto-transfer of any small amount you won’t miss - $25/week or $100/month - into a TFSA/Roth or RRSP/401(k) fund you already have.

• Turn on reinvest dividends.
     Tiny habit now → big orchard later.