How DA is calculated

This is a simplified explanation to help you understand the logic used by the calculator.

Important DA FAQs

1) What is DA?
DA is an allowance linked to inflation. It helps protect salary and pension value when prices rise.
2) DA is based on which index?
DA is based on CPI-IW (Consumer Price Index for Industrial Workers), which is released monthly.
3) When does DA revise?
DA is generally revised twice a year: January and July. The exact rate depends on official notification.
4) Is the calculator output final?
No. This tool shows an expected calculation based on available CPI-IW data. The final DA rate is confirmed only through Government orders.
5) Why does expected DA differ across websites?
Some months’ CPI-IW numbers may not be available yet, rounding methods can differ, and only the official order finalizes the rate.
6) What should I enter in the calculator?
Enter the month-wise CPI-IW values as available. The DA points update automatically.
7) What is the difference between “DA points” and “DA percent”?
DA points come from the CPI-IW based formula. DA percent is the final rounded rate announced officially.
8) What should users do before making any decision?
Treat this as guidance. Always wait for the official DA/DR order for the final rate.
Note for users:
CPI-IW values get updated monthly, so the expected DA trend can change as new data is released.