Start Investing at 25 vs 35: What Compounding Changes

Same monthly amount, different start date — compounding does the rest. Later starters still have levers.

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Investing Basics By Wealthton Editorial Team Published: Feb 26, 2026 | Updated: August 2026 8 min read Last reviewed: August 2026
About the table: Figures use a steady 7% annual return compounded monthly with no fees or taxes. Real markets bounce; this isolates start date and contribution size.

Two people can earn similar incomes and still finish with very different balances because one started contributing a decade earlier. That is arithmetic, not a moral ranking. If you are already 35, raise the contribution rate — do not sit with the guilt.

$300 a month at 7%: side by side

Friend A starts at 25. Friend B starts at 35. Both invest $300 at month-end. Both stop adding at age 60. Return assumption: 7%/year compounded monthly.

Age A (start 25) A cash in B (start 35) B cash in
30 $21,500 $18,000 — —
35 $51,900 $36,000 $0 $0
40 $95,100 $54,000 $21,500 $18,000
50 $243,000 $90,000 $95,100 $54,000
60 $540,300 $126,000 $243,000 $90,000

At 60, A is ahead by about $297,000 while only contributing $36,000 more in cash ($126k vs $90k). Most of the gap is compounding on the early years, not the extra deposits alone.

What a later starter can do

To finish near A’s ~$540,300 at 60 while starting at 35 under the same 7% assumption, B needs about $667/month — more than double $300. Other paths from 35 to 60 under the same return assumption:

  • $400/month → ~$324,000
  • $500/month → ~$405,000
  • $600/month → ~$486,000

Time is the early starter’s lever; contribution rate is the later starter’s. Raises, bonuses, and paid-off loans should hit the automatic transfer before they disappear into lifestyle.

Canadian levers that change the catch-up story

  • TFSA / RRSP room: unused room is a catch-up tool—confirm your personal room with the CRA (TFSA) and your RRSP deduction limit on CRA notices. Filling room with a higher contribution rate matters more than hunting a hot stock.
  • Workplace match: unmatched free money is often the first place to increase contributions.
  • Fees: a 0.6% MER gap compounds for decades — see ETF vs mutual fund.

What this comparison leaves out

  • Returns are not smooth 7%. Sequence of returns near retirement can matter more than the average.
  • Taxes, inflation, and fees are ignored here.
  • Someone who could not invest at 25 because of debt or low income is not “behind morally” — they need a cash-flow plan now.
  • Working a few years longer can close gaps that feel impossible with contributions alone — see retire at 60 vs 65.

Questions before you change your contribution

  1. What monthly amount can I automate after cash and high-rate debt are handled?
  2. If I am catching up from a later start, am I raising contributions — or only feeling guilty?
  3. Would a 20% market drop make me stop? If yes, rebuild cash or lower stock risk before increasing the transfer.
  4. Which account (TFSA / RRSP / taxable) gets the next dollar?

What to do next

  1. Automate a contribution you can keep during an ordinary bad month.
  2. Increase it when income rises (even $50 steps count).
  3. Keep an emergency fund so you are not forced to sell.
  4. Re-run the projection annually instead of replaying age regret.

Run your numbers in the Compound Interest Calculator and Monthly Investment Calculator. For the compounding concepts behind this example, start with Core Investing Concepts. For the longer path, read the Retirement Planning Guide.

Primary sources

CRA references for TFSA and RRSP room. Table balances are teaching math under a fixed return — not a forecast of your results.

Disclaimer: Educational only — not financial advice. Your returns, taxes, and timeline will differ from these assumptions.