The retirement day can be the happiest or the saddest day of your life, depending upon the retirement savings or retirement kitty that you have accumulated. The real question is how much do you really need? There is no one answer for this as there are many factors that have an impact. There are many calculators available that can help you to estimate the 'how much', but often people are taken aback by the figures given by these calculators. Hence, understanding the logic behind these calculations is very important to appreciate the amount needed. For determining any retirement kitty need, you need to follow the following steps…
To do this you will have to first decide the retirement age and then put a number for life expectancy. The difference between the life expectancy and your planned retirement age is your post-retirement years, which you need to plan for.
Finding the monthly income need properly is important to ensure that you can fund the household, medical and other expenses after retirement. Generally, you may consider 80% of your existing monthly expenses here.
The monthly income need would be growing, at say, the average retail inflation rate for the entire period between today & the end of the post-retirement years. Thus, we can have different pre- & post-retirement inflation rates which can be between 5 to 7%. Assuming a higher figure would be safer.
Next would be to assume the returns on investments done for the retirement kitty. We will need to assume a lower but safer rate of returns on these investments, which would generally be made in the debt asset class.
Considering the assumptions, the numbers can be relatively easy to visualise & calculate. To arrive at the retirement kitty, the returns and the principal component of the retirement kitty should match the cash flows of the growing monthly expenses. The difficult part is about making assumptions that can be easily impacted by several factors over the long term. The following retirement matrix can help you to get a brief idea of the retirement kitty needs. We have assumed current monthly expenses of Rs.50,000 in the matrix with inflation at 6%, post-tax returns on retirement kitty at 8% and life expectancy of 85 years to be on a safer side, negating the huge risk of living longer.
We have also calculated the monthly savings required from today to create this retirement kitty if invested at different rates of returns.
Clearly, if you are short of your monthly savings, the choice of asset classes get narrow. High returns could be generated only by investing in a growth asset class like equities in the long term, preferably through the monthly SIP route in mutual fund schemes. Please note, if you do not wish to take the risk, clearly, the suggested monthly savings would have to be increased drastically. A crucial point to note here is that the returns considered should be post-tax.