Inflation & Post-Tax Real Return Calculator
Evaluate what your savings and fixed-income investments earn in real purchasing power after deducting income tax slab rates (0%, 10%, 20%, 30%) and India’s headline CPI retail inflation (5.54%).
Post-Tax Real Return Matrix at 5.54% CPI Inflation (7.10% Nominal FD)
| Income Tax Slab | Post-Tax Yield | CPI Inflation | Net Real Return |
|---|---|---|---|
| 0% (Tax Exempt) | 7.10% | 5.54% | +1.56% p.a. |
| 10% Tax Slab | 6.39% | 5.54% | +0.85% p.a. |
| 20% Tax Slab | 5.68% | 5.54% | +0.14% p.a. |
| 30% Tax Slab | 4.97% | 5.54% | -0.57% p.a. |
Frequently Asked Questions
How does this CPI Inflation Calculator measure real return and purchasing power?
First compute post-tax nominal yield as Nominal Rate × (1 − Income Tax Slab%). Then adjust against India’s headline MoSPI CPI inflation rate (5.54%) to measure net purchasing power gain or erosion over 1 to 10 years.
Why can a 7% Fixed Deposit produce negative real returns after tax and inflation?
For an investor in the 30% tax slab, a 7.00% FD yields 4.90% post-tax. Whenever CPI inflation (5.54%) approaches or exceeds 4.90%, real purchasing power stagnates or declines.
What is the Fisher equation used in inflation rate calculators?
The exact Fisher equation defines real return as ((1 + Post-Tax Rate) / (1 + Inflation Rate)) − 1, showing how much today-equivalent goods and services your future corpus can purchase.