Investment Return Calculator (2026)

Updated for May 2026.

Enter your starting investment value, ending value, and years held — get your total return %, annualised return (CAGR), and inflation-adjusted real return.

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Use the Calculator

→ Open Investment Return Calculator

What to enter:

• Starting investment value (what you invested)
• Ending value (what it's worth now, or your projected target)
• Number of years held
• Optional: dividends or cash flows received during the period
• Optional: inflation rate for real return calculation (current CPI: 3.30%, source: data/rates.json)

What you get:

• Total return % (simple)
• Annualised return / CAGR (Compound Annual Growth Rate)
• Real (inflation-adjusted) annualised return
• Comparison to benchmark (HYSA at 4.10% APY, S&P 500 at ~10% long-run average)

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The Three Return Metrics Explained

1. Total Return

The simplest measure: how much did your investment gain or lose as a percentage?

Total Return = (Ending Value − Starting Value) / Starting Value × 100

Example: $10,000 → $18,000 over 7 years Total Return = (18,000 − 10,000) / 10,000 × 100 = 80%

2. CAGR (Compound Annual Growth Rate)

The annualised rate that gets you from starting to ending value. This is the most useful comparison metric.

CAGR = (Ending Value / Starting Value)^(1/years) − 1

Same example: $10,000 → $18,000 over 7 years CAGR = (18,000 / 10,000)^(1/7) − 1 = (1.80)^(0.1429) − 1 = 8.78% per year

3. Real Return (Inflation-Adjusted)

What your CAGR actually buys, after inflation erodes purchasing power.

Real Return = (1 + CAGR) / (1 + Inflation Rate) − 1

At current inflation of 3.30% (BLS CPI YoY, data/rates.json): Real Return = (1.0878) / (1.0326) − 1 = 5.35% real return

The real return is what actually matters for building wealth — your money needs to outpace inflation, not just grow in nominal terms.

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Benchmark Comparison: What Does Your Return Mean?

If your investment's CAGR is below 4.10% — the current HYSA rate — you would have been better off keeping the money in a savings account with zero risk. That's your opportunity cost floor.

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Quick Reference: What CAGR Produces What

Starting with $50,000, no additional contributions:

At 10% CAGR vs. 4.10% HYSA over 20 years: $336,375 vs. $110,661 — a $225,714 difference on the same $50,000. That's the long-run cost of keeping investable capital in a savings account.

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Common Return Calculation Mistakes

Mistake 1: Using total return instead of CAGR for comparisons. "My investment returned 50% over 5 years" sounds strong. But CAGR = (1.50)^(1/5) − 1 = 8.45% annualised. Compare CAGR to benchmarks, not total return %.

Mistake 2: Forgetting dividends. If a stock paid $500 in dividends over the holding period, include that in the ending value (or as a separate cash flow input) for an accurate total return. Ignoring dividends understates return — for the S&P 500, dividends historically contributed 1.5–2% per year to total return.

Mistake 3: Ignoring inflation. A 7% nominal return in a 3.30% inflation environment is a 3.62% real return. Over 20 years, a $50,000 investment returning 7% nominally grows to $193,484 — but in today's purchasing power, that's equivalent to about $98,000. Plan for real returns, not nominal.

Mistake 4: Annualising short-period returns incorrectly. If an investment returns 20% in 3 months, the annualised return is NOT 80% (4 × 20%). CAGR = (1.20)^(12/3) − 1 = (1.20)^4 − 1 = 107%. The calculator handles this automatically.

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Also Useful

• Compound Interest Calculator — project forward from a starting balance and monthly contributions
• SIP Calculator — model systematic monthly investment returns
• The Power of Compound Interest — understand why CAGR and time horizon matter so much

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Frequently Asked Questions

What's the difference between ROI and CAGR?

ROI (Return on Investment) is the total percentage gain or loss over the entire holding period — it doesn't account for how long you held the investment. CAGR (Compound Annual Growth Rate) is the year-by-year equivalent rate that produced that ROI. CAGR is better for comparing investments held for different time periods. For example, 50% ROI over 3 years (CAGR: 14.5%) is much better than 50% ROI over 10 years (CAGR: 4.1%).

How do I calculate return if I made multiple contributions?

For investments with multiple contributions or withdrawals over time, simple CAGR doesn't work — you need IRR (Internal Rate of Return), which accounts for the timing of each cash flow. The investment return calculator accepts optional cash flows to compute IRR. Alternatively, for a rough estimate, you can use the time-weighted return method: calculate return for each period between contributions and chain them together.

What is a "good" investment return?

In the current environment (May 2026), a risk-free HYSA returns **4.10% APY** (data/rates.json). Anything above that justifies taking on investment risk. Historically, a diversified equity portfolio has returned 7–10% annualised over long periods. If your investments are returning less than 5% annually over 5+ years, consider whether your asset allocation is appropriate for your time horizon. Context matters: a 4% return in a 3% inflation environment is a real gain; the same 4% in a 6% inflation environment is a real loss.

Can I use this calculator for real estate returns?

Yes — enter purchase price as starting value and current market value as ending value, include rental income as cash flows, and adjust for expenses (mortgage interest, maintenance, taxes) to get net return. Real estate CAGR is typically 3–5% on price appreciation alone; total return including rental yield is higher. Entering all cash flows gives you an accurate IRR on the property investment.

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This article is for informational purposes only and does not constitute financial advice. Investment return projections use illustrative historical averages and are not a guarantee of future performance. CPI inflation rate 3.30% sourced from BLS data (data/rates.json). Savings APY 4.10% from FRED-derived data as of May 11, 2026.