Step 1: Calculate the number of months left till marriage Number of months left till marriage = (Child's age at the time of marriage - Child's current age) * 12
Step 2: Calculate the amount to be saved every month Amount to be saved every month = (Expenditure on the marriage - Current savings for the marriage) / Number of months left till marriage
Step 3: Adjust for inflation and rate of return (optional) If you want to adjust for inflation and rate of return, you can modify the formula as follows: Adjusted amount to be saved every month = Amount to be saved every month * (1 + Rate of inflation) / (1 + Rate of return)
This adjusted amount takes into account the impact of inflation and the potential return on investment.
Please note that this formula assumes a constant rate of inflation and return on investment. In reality, these rates may vary over time.