Investing
Corpus
The future value of a series of equal monthly instalments at the end of each month.
The Formula
Corpus = P x ((1 + i)^n - 1) / i
The future value of a series of equal monthly instalments at the end of each month.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| P | Monthly instalment | currency | Amount invested each month. |
| i | Monthly rate | rate | Expected annual return divided by twelve. |
| n | Months | count | Number of instalments. |
What Each Symbol Means
Pcurrency
Monthly instalment
Amount invested each month.
irate
Monthly rate
Expected annual return divided by twelve.
ncount
Months
Number of instalments.
See It Worked With Real Numbers
A formula on its own does not tell you which number goes where. The how to calculate sip corpus page applies this equation to a concrete case, shows every intermediate step, and names the mistakes that produce a wrong answer even when the algebra is right.
Where This Formula Appears
This equation is the working core of How To Calculate SIP Corpus, filed under Finance. Every number the guide produces comes from substituting into this one line.