Mutual Fund Calculator
Fast, accurate and free online funduszy inwestycyjnych calculator tool running directly in your browser.
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Operation Summary
| Paid-in Capital | 10 000,00 PLN |
| Net Capital (at start) | 9 900,00 PLN |
| Gross profit (before tax) | 990,00 PLN |
| Net Profit (at hand) | 801,90 PLN |
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Other tools you may find usefulInvestment funds calculator - calculate the real profit after fees
This tool allows you to quickly and precisely calculate the profit from investment funds, taking into account key factors such as management fee, commissions, investment duration and volatility of the rate of return. Based on your data, the calculator generates a net result, showing you how much you actually made (or lost) after all the costs associated with the fund.
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Formulas and theory
Basic concepts
Mutual fund is a collective portfolio of assets into which investors deposit funds, and the fund manager invests them in various financial instruments - shares, bonds, contracts or deposits. The investor's profit depends on the increase in the value of the participation unit (CU) over time, less all fees.
Formula for profit from the fund
Profit = (Final value – Initial value – Fees) × (1 – Belka tax)
- Initial value– investment amount (e.g. PLN 10,000)
- Final value– value of units after the investment period
- Fees– sum of management fees and commissions
- Belka tax– 19% of capital gain
Taking fees into account over time
Management fees in funds are calculated daily or monthly on the net asset value (NAV). Even a small difference in the annual fee can significantly reduce the final result after a few years. That's why the calculator allows you to simulate the annual fee, the number of years of investment and the reinvestment of profits.
How the
calculator works The mutual fund calculator allows you to enter investment parameters and immediately calculates:
- final value of participation units,
- gross and net profit,
- impact of management fees,
- real annual rate of return (CAGR).
Uses a formula for investment growth with reinvestment of profit after deducting costs, which allows you to obtain a realistic result corresponding to the structure of a typical investment fund.
Examples
Example 1. Equity fund with moderate risk
Data:Investment PLN 20,000, average annual return 8%, management fee 2%, period 5 years.
Calculation:FV ≈ 20,000 × (1 + (0.08 – 0.02))⁵ = 20,000 × 1.314 = PLN 26,280. After tax Belka: approx. PLN 25,090.
The effective net profit is approximately PLN 5,090, or 25.5% in 5 years.
Example 2. Low-risk bond fund
Data:Investment PLN 15,000, annual return 4%, management fee 1%, period 3 years.
Calculation:FV ≈ 15,000 × (1 + (0.04 – 0.01))³ = 15,000 × 1.0927 = PLN 16,390. After tax: approx. PLN 16,100.
Net profit PLN 1,100, effectively 7.3% in three years. Stable result with lower risk.
Example 3. Mixed fund with mixed fees
Data:Investment PLN 10,000, average return 6%, fee 2.5%, period 10 years.
Result:FV ≈ 10,000 × (1 + (0.06 – 0.025))¹⁰ ≈ PLN 12,820. Net profit after tax ≈ PLN 2,283.
Conclusion: long-term exposure to fees strongly reduces the real result.
Example 4. Aggressive equity fund
Data:Investment PLN 30,000, return 12%, fee 3%, period 7 years.
Result:FV ≈ 30,000 × (1 + (0.12 – 0.03))⁷ ≈ 30,000 × 1.893 = PLN 56,790. After tax ≈ PLN 52,700.
Effective profit PLN 22,700 net. High risk, but also high potential profit.
Comparison table
| Fund type | Average annual return | Management fee | Features |
|---|---|---|---|
| Equity | 8-12% | 1.5-3% | High risk, high growth potential |
| Bond | 3–5% | 0.5–1.5% | Safer, stable return |
| Mixed | 5–7% | 1–2.5% | Balanced between risk and stability |
| Money Market | 2-4% | 0.5-1% | Lowest risk, low return |
Frequently asked questions (FAQ)
How to include the management fee in the calculation?
The calculator reduces the annual rate of return by the fee indicated as it is deducted from the fund's assets on a daily or monthly basis. Thanks to this, the final result shows the real effectiveness of the investment.
Does the result include Belka's tax?
Yes. By default, the calculator deducts 19% capital gains tax, showing the net result to be withdrawn.
Does the fund guarantee a profit?
No. The result depends on the market situation and portfolio structure. The calculator is for simulation purposes and does not constitute a forecast or investment recommendation.
How to compare two funds?
Compare net return after fees, investment duration and historical performance volatility. A higher gross profit does not always mean a better result after taking into account management costs.
Why is the effective rate of return (CAGR) lower than the nominal rate?
Because it takes into account the impact of fees and taxes over time. CAGR is the best indicator for assessing the effectiveness of long-term investment in funds.
Summary
The webp.pl investment fund calculator is a practical tool for analyzing real investment results, taking into account all key costs. Thanks to it, you will find out what the effective rate of return on your fund is, what the net profit is and how much impact management fees have on the final result. Just enter your data and clickCountto get a clear result.