Calculating your value after fees is straightforward once you know the Expense Ratio Impact formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Expense Ratio Impact Calculator.
What is Expense Ratio Impact?
The Expense Ratio Impact calculation tells you your value after fees from a few simple inputs. The figure you are solving for here is the value after fees, expressed in INR.
The Expense Ratio Impact formula
The core formula is:
Value after fees = Investment amount × pow(1 + (Annual return - Expense ratio) ÷ 100, Years invested)Here is what each input means:
- Investment amount — a money amount. Example: ₹10,00,000.
- Annual return — a percentage, such as an annual rate. Example: 12%.
- Expense ratio — a percentage, such as an annual rate. Example: 1%.
- Years invested — a value you set on the slider. Example: 20 years.
How to calculate it step by step
- Write down the investment amount (for example, ₹10,00,000).
- Write down the annual return (for example, 12%).
- Write down the expense ratio (for example, 1%).
- Note the years invested (for example, 20 years).
- Apply the formula above to get your value after fees.
- Double-check the result with the Expense Ratio Impact Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Investment amount | ₹10,00,000 |
| Annual return | 12% |
| Expense ratio | 1% |
| Years invested | 20 years |
| Value after fees | ₹80,62,312 |
| Value without fees | ₹96,46,293 |
| Lost to fees | ₹15,83,982 |
With investment amount of ₹10,00,000, annual return of 12%, expense ratio of 1% and years invested of 20 years, the value after fees works out to ₹80,62,312.
Example 2
With investment amount of ₹20,00,000, annual return of 12%, expense ratio of 1% and years invested of 20 years, the value after fees works out to ₹1,61,24,623.
| Result | Value |
|---|---|
| Value after fees | ₹1,61,24,623 |
| Value without fees | ₹1,92,92,586 |
| Lost to fees | ₹31,67,963 |
Example 3
With investment amount of ₹5,00,000, annual return of 12%, expense ratio of 1% and years invested of 20 years, the value after fees works out to ₹40,31,156.
| Result | Value |
|---|---|
| Value after fees | ₹40,31,156 |
| Value without fees | ₹48,23,147 |
| Lost to fees | ₹7,91,991 |
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
- Annual rates must be converted to the period you are calculating for (for example, divide an annual rate by 12 for a monthly figure).
Prefer not to do the maths by hand? — the Expense Ratio Impact Calculator does it instantly, for free, with the formula and a worked example built in.
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