---
title: "Real Return Calculator: After Inflation | RupeeCase"
description: "Real return calculator: the inflation adjusted return after tax, using the Fisher relation, and what an amount grows to in future and in today’s rupees."
source_url: "https://www.rupeecase.com/learn/tools/real-return-calculator"
---

Real return a year**5.66%**
Return after tax**12.00%**
Quick estimate (nominal minus inflation)**6.00%**
Value in 10 years, future rupees**₹3.11 L**
The same in today’s rupees**₹1.73 L**

* Future rupees
* Today’s rupees

Real return = (1 + return after tax) / (1 + inflation) - 1 (the Fisher relation). Tax here is a flat share of each year’s return, a simplification.
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  01How it works

## In plain words.
Inflation divides, it does not subtract. The real return is one plus the return after tax, divided by one plus inflation, minus one. For small numbers that is close to return minus inflation, and it drifts further away as the numbers grow.

    The formula

`Return after tax = return x (1 - tax rate)``Real return = (1 + return after tax) / (1 + inflation) - 1`

  02Worked example

## The default numbers, by hand.
12% with 6% inflation and no tax: 1.12 / 1.06 - 1 = 5.66%, not 6%. With 30% tax on the return: 8.4% after tax and a real return of 2.26%.

| Input | Value |
| --- | --- |
| Return a year | 12% |
| Inflation a year | 6% |
| Tax on the return | 0% |
| Amount | ₹1,00,000 |
| Years | 10 years |

| Result | Value |
| --- | --- |
| Real return a year | 5.66% |
| Return after tax | 12.00% |
| Quick estimate (nominal minus inflation) | 6.00% |
| Value in 10 years, future rupees | ₹3.11 L |
| The same in today’s rupees | ₹1.73 L |

  03Key concepts

## What to know before you use it.

### India’s inflation target
The RBI’s target is 4% CPI inflation within a band of 2% to 6%, renewed for 1 Apr 2026 to 31 Mar 2031. CPI (Combined) inflation ran between 3.4% (FY 2018-19) and 6.75% (FY 2022-23) in recent years.

### Why it matters
Goals are paid in future rupees but felt in today’s. The real return is the rate at which purchasing power actually grows.

### Good to know

* A deposit rate below inflation has a negative real return before tax.
* Use a higher inflation figure for costs that tend to rise faster, such as education or medical care.

  04Assumptions

## What the calculator assumes.

* Constant return, inflation and tax rate; tax charged on each year’s return, a simplification.

    Sources, checked 12 Oct 2026

1. [data.gov.in, CPI (Combined) retail inflation FY 2017-18 to 2022-23 (Rajya Sabha answer, MOSPI data): 3.41% in 2018-19 to 6.75% in 2022-23](https://community.data.gov.in/?p=115806)
2. [data.gov.in, CPI (Combined) retail inflation FY 2017-18 to 2022-23 (Rajya Sabha answer, MOSPI data): 3.41% in 2018-19 to 6.75% in 2022-23](https://community.data.gov.in/?p=115806)

  05Questions

## Asked about the Real return after inflation.
How do you calculate real return?Real return = (1 + nominal return) / (1 + inflation) - 1. At 12% and 6%: 5.66%.

Why not just subtract inflation?Subtracting is an approximation that overstates the real return, more so at higher rates.

    Explore next

## Learn the idea behind the numbers.

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* [Free module 7.3Inflation, Types, Measurement, and Investment Impact10 min read](/learn/path-7/module-7-3-inflation-types-measurement-investment-impact)
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06Keep going

## Learn the idea, see it applied.

  [Module 7.3Inflation: Types, Measurement, and Investment Impact10 min read, Path 07](/learn/path-7/module-7-3-inflation-types-measurement-investment-impact)[Module 7.2RBI and Monetary Policy11 min read, Path 07](/learn/path-7/module-7-2-rbi-monetary-policy)[The matching indexNifty 50 Equal WeightAll 50 Nifty names, equal weight. The simplest card on the lineup.CAGR16.4%Sharpe1.13Max DD−15.7%Model, back tested, as of 27 Apr 2026. Not client returns, not a promise. Risk band: Moderate.](/strategies/nifty-50-equal-weight)

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  Education only, not investment advice. RupeeCase is a technology platform operated by QC Alpha Technologies Pvt Ltd; it is not a fund, a PMS or a SEBI registered investment adviser. Model returns are back tested and not a promise of future returns. Figures carry the date they were checked.