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These investing examples are designed around a compound interest calculator approach: each article answers a common question and links to a calculator so you can run your own numbers.

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Weekly investing examples

Monthly investing examples

$100 a month invested for 10 years

Estimate what $100 per month invested for 10 years could grow to. Compare conservative vs optimistic return scenarios.

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$100 a month invested for 20 years

Estimate what $100 per month invested for 20 years could grow to. Compare conservative vs optimistic return scenarios.

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$100 a month invested for 30 years

Estimate what $100 per month invested for 30 years could grow to. Compare conservative vs optimistic return scenarios.

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$1000 a month invested for 10 years

Estimate what $1000 per month invested for 10 years could grow to. Compare conservative vs optimistic return scenarios.

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$1000 a month invested for 20 years

Estimate what $1000 per month invested for 20 years could grow to. Compare conservative vs optimistic return scenarios.

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$200 a month invested for 10 years

Estimate what $200 per month invested for 10 years could grow to. Compare conservative vs optimistic return scenarios.

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$200 a month invested for 15 years

Estimate what $200 per month invested for 15 years could grow to. Compare conservative vs optimistic return scenarios.

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$200 a month invested for 30 years

Estimate what $200 per month invested for 30 years could grow to. Compare conservative vs optimistic return scenarios.

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$300 a month invested for 10 years

Estimate what $300 per month invested for 10 years could grow to. Compare conservative vs optimistic return scenarios.

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$300 a month invested for 20 years

Estimate what $300 per month invested for 20 years could grow to. Compare conservative vs optimistic return scenarios.

Read article → Category: monthly

$300 a month invested for 30 years

Estimate what $300 per month invested for 30 years could grow to. Compare conservative vs optimistic return scenarios.

Read article → Category: monthly

$500 a month invested for 10 years

Estimate what $500 per month invested for 10 years could grow to. Compare conservative vs optimistic return scenarios.

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$500 a month invested for 20 years

Estimate what $500 per month invested for 20 years could grow to. Compare conservative vs optimistic return scenarios.

Read article → Category: monthly

$500 a month invested for 30 years

Estimate what $500 per month invested for 30 years could grow to. Compare conservative vs optimistic return scenarios.

Read article → Category: monthly

Lump sum examples

$1,000 invested once for 10 years

Estimate what a one-time $1,000 investment could grow to over 10 years using different return-rate scenarios.

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$1,000 invested once for 20 years

Estimate what a one-time $1,000 investment could grow to over 20 years using different return-rate scenarios.

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$1,000 invested once for 30 years

Estimate what a one-time $1,000 investment could grow to over 30 years using different return-rate scenarios.

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$10,000 invested once for 10 years

Estimate what a one-time $10,000 investment could grow to over 10 years using different return-rate scenarios.

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$10,000 invested once for 15 years

Estimate what a one-time $10,000 investment could grow to over 15 years using different return-rate scenarios.

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$10,000 invested once for 20 years

Estimate what a one-time $10,000 investment could grow to over 20 years using different return-rate scenarios.

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$10,000 invested once for 30 years

Estimate what a one-time $10,000 investment could grow to over 30 years using different return-rate scenarios.

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$100,000 invested once for 10 years

Estimate what a one-time $100,000 investment could grow to over 10 years using different return-rate scenarios.

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$100,000 invested once for 20 years

Estimate what a one-time $100,000 investment could grow to over 20 years using different return-rate scenarios.

Read article → Category: lumpsum

$20,000 invested once for 10 years

Estimate what a one-time $20,000 investment could grow to over 10 years using different return-rate scenarios.

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$20,000 invested once for 20 years

Estimate what a one-time $20,000 investment could grow to over 20 years using different return-rate scenarios.

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$5,000 invested once for 10 years

Estimate what a one-time $5,000 investment could grow to over 10 years using different return-rate scenarios.

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$5,000 invested once for 20 years

Estimate what a one-time $5,000 investment could grow to over 20 years using different return-rate scenarios.

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$5,000 invested once for 30 years

Estimate what a one-time $5,000 investment could grow to over 30 years using different return-rate scenarios.

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$50,000 invested once for 10 years

Estimate what a one-time $50,000 investment could grow to over 10 years using different return-rate scenarios.

Read article → Category: lumpsum

$50,000 invested once for 20 years

Estimate what a one-time $50,000 investment could grow to over 20 years using different return-rate scenarios.

Read article → Category: lumpsum

Retirement planning

How much do I need to retire at 55?

Estimate the portfolio you may need to retire at 55 using income goals and withdrawal rates.

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How much do I need to retire at 70?

Estimate how much you might need to retire at 70 using income goals and withdrawal rates.

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Retire early vs retire later: what changes?

Compare the impact of retiring early vs later on your required portfolio size.

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How much do I need to retire on $100,000 a year?

Estimate a retirement portfolio target for $100,000/year using different withdrawal rates.

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How much income can my portfolio generate?

Estimate how much annual income your portfolio might generate at different withdrawal rates.

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ETF vs savings comparisons

ETF vs savings account: which is better?

Compare ETFs (index funds) vs savings accounts using a simple decision guide and the calculator.

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Index fund vs high-yield savings: pros and cons

A US-friendly guide: high-yield savings vs index funds (ETFs). Compare short-term stability vs long-term growth.

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Savings account vs index fund: what’s better?

Choose based on your goal and time horizon, then run your own numbers in the ETF vs savings calculator.

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ETF vs savings: common mistakes to avoid

Avoid common errors when comparing ETFs vs savings: unrealistic assumptions, short horizons, and ignoring risk.

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ETF vs savings during high interest rates

When savings rates are high, does it still make sense to invest in ETFs? Compare scenarios and understand the tradeoffs.

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ETF vs savings for 1 year: what makes sense?

Compare ETF investing vs a savings account for a 1-year time horizon. Learn why short timelines often favour savings.

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ETF vs savings for 3 years: what’s the better option?

Compare ETF investing vs savings over 3 years. Learn when ETFs might be reasonable and when savings is safer.

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ETF vs savings for 5 years: how to decide

Compare ETF investing vs savings over 5 years and see how time changes the risk/return tradeoff.

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ETF vs savings for an emergency fund

Should you keep an emergency fund in ETFs or in a savings account? Learn why liquidity and stability matter most.

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ETF vs savings for a house deposit

Should you invest in ETFs or save for a house deposit? Compare outcomes and risks for common timelines.

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ETF vs savings for kids: what’s better?

Compare saving vs investing for kids over different time horizons and contribution patterns.

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ETF vs savings: how to choose in 60 seconds

A simple decision framework for choosing ETFs vs savings based on timeline, risk tolerance, and goal type.

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ETF vs term deposit: which is better?

Compare ETFs vs term deposits for different timelines, and learn which fits short vs long-term goals.

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Savings account vs ETF returns: what to assume

How to choose reasonable assumptions for savings interest and ETF returns when modelling the future.

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Savings rate vs ETF return: what matters most?

Understand stable savings interest vs variable ETF returns, and how to compare them fairly.

Read article → Category: etf-vs-savings

Other

Investing $200 a month in the S&P 500 for 20 years

See example scenarios for $200/month over 20 years, then use the calculator to run your own assumptions.

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Is it better to invest weekly or monthly?

Weekly can be slightly ahead, but the difference is usually small—compare both schedules in the calculator.

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$100 a week invested for 10 years

Model what $100 per week invested for 10 years could grow to. Compare multiple return rates using the calculator.

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$100 a week invested for 20 years

Model what $100 a week invested for 20 years could grow to. Compare multiple return-rate scenarios with our calculator.

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$100 a week invested for 30 years

Model what $100 a week invested for 30 years could grow to. Compare multiple return-rate scenarios with our calculator.

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$1000 a week invested for 10 years

Model what $1000 a week invested for 10 years could grow to. Compare multiple return-rate scenarios with our calculator.

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How much will $10,000 be worth in 15 years?

Estimate what $10,000 could grow to over 15 years at different return rates. Use the calculator to test scenarios.

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$200 a month invested for 20 years

Estimate what $200 per month invested for 20 years could grow to. Compare multiple return-rate scenarios.

Read article → Category: other

$200 a week invested for 10 years

Model what $200 a week invested for 10 years could grow to. Compare multiple return-rate scenarios with our calculator.

Read article → Category: other

$200 a week invested for 20 years

Model what $200 a week invested for 20 years could grow to. Compare multiple return-rate scenarios with our calculator.

Read article → Category: other

$25 a week invested for 20 years

Model what $25 a week invested for 20 years could grow to. Compare multiple return-rate scenarios with our calculator.

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$25 a week invested for 25 years

Model what $25 a week invested for 25 years could grow to. Compare multiple return-rate scenarios with our calculator.

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$25 a week invested for 30 years

Model what $25 a week invested for 30 years could grow to. Compare conservative vs optimistic return rates.

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$25 a week invested for 40 years

Model what $25 a week invested for 40 years could grow to. Compare multiple return-rate scenarios with our calculator.

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$300 a week invested for 10 years

Model what $300 a week invested for 10 years could grow to. Compare multiple return-rate scenarios with our calculator.

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$50 a week invested for 10 years

Model what $50 a week invested for 10 years could grow to. Compare multiple return-rate scenarios with our calculator.

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$50 a week invested for 15 years

Model what $50 a week invested for 15 years could grow to. Compare multiple return-rate scenarios with our calculator.

Read article → Category: other

$50 a week invested for 20 years

See what $50 a week could grow to over 20 years at different return rates. Use the calculator and compare scenarios.

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$50 a week invested for 30 years

Model what $50 a week invested for 30 years could grow to. Compare multiple return-rate scenarios with our calculator.

Read article → Category: other

$500 a week invested for 10 years

Model what $500 a week invested for 10 years could grow to. Compare multiple return-rate scenarios with our calculator.

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$75 a week invested for 20 years

Model what $75 a week invested for 20 years could grow to. Compare multiple return-rate scenarios with our calculator.

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Compound interest mistakes that cost you years of growth

Common mistakes people make with compound interest: waiting to start, inconsistent contributions, high fees, and unrealistic assumptions.

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Dollar‑cost averaging vs lump sum: which is better?

Compare lump-sum investing vs dollar-cost averaging, and learn how to model both approaches using the calculator.

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ETF vs savings account: pros and cons

A plain-English guide to ETF vs savings accounts, with pros/cons and a calculator to compare outcomes over time.

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High-interest savings vs index fund

Compare high-interest savings accounts with index funds over different time horizons, and learn when each makes sense.

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How much emergency fund should I keep?

A practical guide to emergency funds and when to invest vs save. Includes a calculator to compare outcomes over time.

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How much do I need to retire at 60?

Estimate how much you might need to retire at 60 using income goals and withdrawal rates. Use the retirement calculator to model it.

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How much should I invest per month to reach $100,000?

Estimate the monthly contribution needed to reach $100,000 over different timelines and return assumptions.

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How much should I invest per month to reach $1,000,000?

Model how much you might need to invest each month to reach $1,000,000 by a target age or year.

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Should I invest or save for a house deposit?

A simple guide to choosing savings vs investing for a house deposit, with a calculator to compare outcomes and risk tradeoffs.

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How much do I need to retire on $40,000 a year?

Estimate a target retirement portfolio for $40,000/year spending using different withdrawal rates and a retirement calculator.

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How much do I need to retire on $60,000 a year?

Estimate the retirement portfolio size needed for $60,000 per year using different withdrawal rates, plus a calculator link.

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Rule of 72: how long to double your money?

Learn the Rule of 72 and estimate how long it takes to double your money at different return rates. Then test with a calculator.

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Safe withdrawal rate: 3% vs 4% vs 5%

Compare 3%, 4%, and 5% withdrawal rates and see how they change your required retirement portfolio size.

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Savings vs investing returns: why small differences matter

See how a small return-rate difference compounds over time. Includes examples and a calculator to compare ETF vs savings.

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Starting investing at 40: what to do

Starting at 40 can still work. Use the catch-up calculator to estimate monthly investing needed to hit a target by retirement.

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Starting investing at 45: a simple catch‑up plan

Starting at 45 isn’t too late. Estimate the monthly amount needed and explore timeline and return assumptions.

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Starting investing at 50: how much per month?

Starting at 50 can still work with a clear target and timeline. Estimate the monthly contribution needed using the catch-up calculator.

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Starting investing at 55: what’s realistic?

Starting at 55 is challenging but not hopeless. Estimate monthly contributions and explore realistic targets and timelines.

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Weekly vs monthly contributions: does it matter?

Compare weekly vs monthly contributions and see what matters most. Includes simple conversion tips and modelling guidance.

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What is the 4% rule?

Understand the 4% rule, what it means, and how to use it as a planning guideline. Includes a retirement calculator link.

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