Investment Return Calculator 2026
See how your portfolio grows with compound interest, monthly contributions, and time
Use this investment return calculator to project how your portfolio grows year by year with compound interest and regular monthly contributions. The S&P 500 has averaged ~10% annually since 1957 — enter that rate to see what consistent investing delivers over your time horizon. Switch currency to see results in GBP, AUD, or INR with country-appropriate default return rates. For tax-efficient investing in your specific country, use the account calculators linked at the bottom.
Invest Tax-Efficiently — Use the Right Account for Your Country
Raw compound growth is only part of the picture. Whether your investment grows inside a tax-free ISA, a tax-deferred 401(k), or a taxable brokerage account determines how much you actually keep. At a 10% return with 24% CGT, you give back ~2.4 percentage points every year to tax in a taxable account. Tax-free wrappers keep your full compound curve intact. Use the right calculator for your situation below.
Calculate monthly mutual fund SIP returns using the correct Indian SIP formula. Includes a goal-based reverse calculator — enter your target corpus to find required monthly SIP.
Why it matters: Indian investors: SIP into Nifty 50 index funds (~12% historical) is the most cost-effective way to compound wealth in India.
Project your 401(k) balance with 2026 IRS limits ($24,500), employer match, and the SECURE 2.0 super catch-up for ages 60–63 ($35,750 total).
Why it matters: Always capture your full employer match first — it's an immediate 50–100% guaranteed return on that portion of your salary.
See exactly how much CGT (18–24%) and dividend tax (up to 35.75% from April 2026) you save inside a Stocks & Shares ISA vs a taxable account.
Why it matters: UK investors: with the annual CGT exemption now just £3,000, the ISA wrapper saves thousands over a 20-year investment horizon.
Project tax-free TFSA growth with 2026 limits ($7,000/year, $109,000 lifetime room). Compare TFSA vs non-registered accounts over your investment horizon.
Why it matters: Canadian investors: all TFSA growth is permanently tax-free. Even if your portfolio triples, zero tax on withdrawal — and room is restored the following January.
Project your super balance at retirement with the 12% SG rate (from July 2025), salary sacrifice, and 15% fund earnings tax during accumulation.
Why it matters: Australian investors: super earnings are taxed at only 15% during accumulation — far lower than most marginal rates. 0% in pension phase.
Investment Return Calculator — Frequently Asked Questions
What is a realistic expected return for my investments?
Realistic 2026 benchmarks: S&P 500 index fund (US) — historical average ~10% nominal, ~7% inflation-adjusted. Nifty 50 index fund (India) — ~12% nominal long-run. All-World ETF — ~8–9% nominal. ASX 200 ETF (Australia) — ~9% nominal. UK FTSE All-Share — ~7–8%. Government bonds — ~4%. High-yield savings — ~4%. For long-term planning, use 6–7% (real, after 3% inflation) to be conservative. S&P 500 averaged 11.5% annually over 40 years to December 2025 per Fidelity.
How is investment return calculated?
This calculator uses monthly compound growth: each month, your balance earns (annual rate ÷ 12) in interest, then your monthly contribution is added. Formula: new balance = (old balance × (1 + monthly rate)) + monthly contribution. This repeats 12 times per year. Compound growth means you earn returns on your returns — which is why longer investment horizons produce dramatically larger final values.
What is the S&P 500 average annual return?
The S&P 500 has averaged approximately 10% annually in nominal terms since 1957. Over the 40 years to December 2025, Fidelity reports an 11.5% average annual total return. After adjusting for ~3% average inflation, the real return is approximately 7–8%. Note: annual returns vary widely — some years gain 30%, others lose 20%. A long investment horizon (10+ years) is essential for equity investments.
How much will $10,000 grow if invested for 20 years?
At 8% annual return with no additional contributions: $10,000 grows to approximately $46,610 in 20 years. With $500/month added: approximately $343,000. At 10% with $500/month: approximately $418,000. The monthly contribution matters far more than the initial lump sum — consistent investing over time is the most powerful wealth-building strategy.
Should I use a tax-advantaged account for investing?
Yes — always maximise tax-advantaged accounts before taxable investing. USA: max 401(k) (especially for employer match) and IRA ($7,000/year 2026). UK: Stocks & Shares ISA (£20,000/year, all growth permanently tax-free, CGT 18–24% saved). Australia: salary sacrifice into super (12% SG from July 2025, 15% fund earnings tax vs up to 45% marginal rate). India: PPF (₹1.5L/year, 7.1% tax-free), NPS, ELSS. Canada: TFSA ($7,000/year 2026, all growth tax-free). See the linked calculators below for each account type.
Does starting amount or starting early matter more?
Starting early matters most. Someone investing $500/month at 25 for 40 years (8% return) accumulates ~$1,745,000. Starting at 35 with $1,000/month for 30 years: ~$1,359,000 — investing twice as much per month but ending with 22% less. Every extra decade of compound time is worth more than doubling your contribution rate. The first $10,000 invested at 25 is worth more at 65 than the same $10,000 invested at 45.
What is the difference between nominal and real investment returns?
Nominal return is the percentage your portfolio grows in money terms. Real return is nominal return minus inflation — it measures actual purchasing power growth. At 10% nominal with 3% inflation, your real return is ~7%. For retirement planning, use real returns (since your future expenses will also be higher). For comparing investment options against benchmarks, use nominal. The S&P 500's long-run real return is approximately 7%.
Quick Tips
Expected Returns by Asset Class
- S&P 500 index fund (US)~10%
- Nifty 50 index fund (India)~12%
- ASX 200 ETF (Australia)~9%
- FTSE All-Share (UK)~7–8%
- All-World ETF (global)~8–9%
- Government bonds~4%
- High-yield savings / HYSA~4%+
Long-run nominal averages. Past returns do not guarantee future results.
Key Principles
- • Start early — time beats contribution size
- • Monthly consistency beats lump-sum timing
- • Use tax-advantaged accounts first
- • Keep costs low — index funds ~0.1%/yr
- • Reinvest dividends for maximum compounding
Tax-Advantaged Accounts
- 🇺🇸 401(k): $24,500/yr · IRA: $7,000/yr
- 🇬🇧 ISA: £20,000/yr (all growth tax-free)
- 🇦🇺 Super: 12% SG + salary sacrifice
- 🇮🇳 PPF: ₹1.5L/yr · NPS · ELSS (80C)
- 🇨🇦 TFSA: $7,000/yr (all growth tax-free)
See the country-specific calculators below.