Passive Income Calculator
Enter your portfolio size, monthly contributions, and expected return to see how much passive income you could generate.
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Combine an investment portfolio with dividend income or rental property to build diversified passive income — the calculator models each stream independently and shows your total monthly income across all sources.
4%
is the widely-used safe withdrawal rate for a 30-year retirement
5 streams
supported — model investments, property, dividends, business, or custom income
7%
is the historical real return of a globally diversified equity portfolio
How passive income from investments works
Passive income from investments comes from the returns generated by a portfolio you have built over time. Unlike a salary, it doesn't require trading your time for money — the capital works on your behalf.
The core mechanism is compound growth. When you invest regularly, your returns generate their own returns. Over decades, this compounding effect means the growth phase of your portfolio significantly outpaces what you actually contributed. A portfolio worth $500,000 at 7% generates $35,000/year — without you doing anything.
The key variables are: how much you start with, how much you contribute each month, the annual return your investments achieve, and how long you let it grow. This calculator models all four simultaneously.
Core formula
FV = P·(1+r)ⁿ + PMT·[((1+r)ⁿ − 1) ÷ r]
Where P = starting investment, r = monthly return rate, n = total months, PMT = monthly contribution
The 4% withdrawal rule explained
The 4% rule — also called the Bengen Rule after financial planner William Bengen who published it in 1994 — states that you can withdraw 4% of your portfolio in year one of retirement, then adjust for inflation each year, and statistically avoid running out of money over a 30-year retirement horizon.
It is derived from historical US stock and bond market data. The rule assumes a roughly 60/40 equity/bond split, though a higher equity allocation tends to support higher withdrawal rates over longer periods.
3%
Conservative
Best for very long horizons (40+ years) or high-spend early retirement. Very low risk of portfolio depletion.
4%
Standard
The widely-cited benchmark. Historically safe for a 30-year retirement with a diversified portfolio.
5%+
Aggressive
Higher income now, higher depletion risk over time. More suitable for shorter retirement horizons or with flexibility to cut spending.
To quickly find your target portfolio size: divide your desired annual passive income by your withdrawal rate. For $3,000/month ($36,000/year) at 4%: divide $36,000 by 0.04 = $900,000.
Realistic return expectations
The return rate you enter has an enormous impact on your final portfolio value because of compounding. Here's what different rate assumptions actually mean:
5%
Conservative
High-grade bonds, balanced funds, cautious equity mix
A realistic rate for investors who want lower volatility. Reflects a portfolio weighted toward bonds and stable assets.
7%
Balanced
Global index funds, 60/40 equity/bond portfolio
Broadly in line with the long-run real return of diversified global equities. The most common assumption for financial planning.
10%
Aggressive
100% US equities (S&P 500 historical average)
The nominal S&P 500 historical average. Possible for long-horizon equity investors, but comes with significant volatility.
Any rate above 12–15% consistently is very difficult to sustain and is typically only achievable through concentrated single-stock bets or leveraged strategies — both of which carry significant downside risk not reflected in this calculator.
Passive income strategies that actually work
Most reliable passive income comes from holding assets that generate returns over time. Here are the three most accessible strategies for most investors:
Index Funds & ETFs
Low-cost index funds (like Vanguard Total Market, S&P 500 ETFs) track broad market indices and automatically reinvest dividends. They require minimal management and have historically produced 7–10% nominal returns over long periods. Ideal for passive investors who want market-rate returns without stock-picking.
Dividend Investing
Building a portfolio of dividend-paying stocks or dividend ETFs generates regular cash income without needing to sell shares. Dividend yields of 3–5% are achievable with established companies. The risk is dividend cuts during economic downturns — diversification across sectors reduces this.
Real Estate (REITs)
Real Estate Investment Trusts (REITs) let you invest in property portfolios without direct ownership. REITs are legally required to distribute 90%+ of income as dividends, often yielding 4–7%. They add diversification but are sensitive to interest rate changes.
Common mistakes when planning for passive income
Using an unrealistic return rate
Plugging in 15–20% annual returns produces impressive numbers but dangerous plans. Most investors achieve 6–9% over the long run. Overestimating your return and underpreparing is one of the most common planning errors.
Ignoring inflation
A portfolio that generates $3,000/month today may only be worth $1,800/month in real terms after 20 years of 2.5% inflation. The inflation-adjusted value this calculator shows is what your income is actually worth in purchasing power.
Starting too late
Compounding is time-dependent — the earlier you start, the larger your eventual portfolio relative to what you contributed. A 25-year-old investing $300/month achieves a significantly larger outcome at 65 than a 40-year-old investing $700/month, even with more total contributions.
Withdrawing too aggressively
Drawing down more than 4–5% per year risks depleting your portfolio during a market downturn. The sequence of returns matters — a bad first decade of retirement combined with high withdrawals can permanently impair a portfolio.
Stopping contributions too early
The final years of an investment period often generate more growth than the early years. Stopping contributions when life gets busy — a house purchase, career change, children — can cost significantly more than the missed contributions themselves.
Confusing gross and net income
This calculator shows gross figures. Investment income is typically subject to capital gains tax, dividend tax, or income tax depending on your account type and jurisdiction. Factor in your expected tax rate when setting targets.
Frequently asked questions
How much do I need to invest to generate $2,000/month in passive income?
Using the 4% rule, you need a portfolio of $600,000 to generate $2,000/month ($24,000/year). At a 3% withdrawal rate you'd need $800,000. The calculator shows exactly how long it takes to reach any target based on your contributions and expected return.
What is the 4% rule?
The 4% rule states that withdrawing 4% of your portfolio annually, adjusted for inflation each year, is statistically unlikely to deplete your portfolio over a 30-year retirement horizon. It was derived from historical US stock and bond market data by financial planner William Bengen in 1994.
What annual return should I use in the calculator?
Use 5% for a conservative estimate (bonds + equities blend), 7% for a balanced assumption (globally diversified index funds), or 10% if you're modelling a long-term all-equity portfolio. Anything above 12% consistently is not realistic for most diversified portfolios.
Is passive income from investments taxable?
Yes, in most cases. Dividends, capital gains, and interest income are typically subject to tax, though the rate depends on your account type, income level, and jurisdiction. Holding investments in a Roth IRA or 401(k) can shelter gains from tax. Consult a tax professional for your situation.
What is a realistic passive income goal for financial independence?
$3,000–5,000/month covers basic to comfortable living in most US states. For full financial independence (no other income needed), target replacing your current monthly expenses. Start with a specific monthly target and use the calculator to work backwards to your required portfolio size and timeline.
Disclaimer
This calculator provides estimates only and does not constitute financial, investment, or tax advice. Past investment returns are not a guarantee of future performance. Results are based on mathematical projections using the inputs provided and assume consistent returns — actual investment returns vary year to year. Always consult a qualified financial adviser before making investment decisions.