One cannot pinpoint the exact amount of life insurance one needs. But there are many methods of arriving at a sound estimate for your coverage requirement. Here are a few ideas to let you start thinking...
This is a very simple and straight forward method. Here we would simply use a multiple of say 10 times and consider the gross, pre-tax income of the person being insured. Assuming a gross income of Rs.15 lakhs yearly, the insurance need would come to be of Rs.1.5 cores or between a range of 1.2 crores to 1.8 crores. The reason we use this is that it normally gives us just enough amount to meet the regular household needs for the family. However, a lot depends on the financial situation of the family/person.
There is another small variation to the universal thumb rule. Here we would consider the number of active earning years remaining, instead of a random number, for the net, post-tax, monthly income instead of the gross income. For example, for a person aged 40, having an in-hand monthly income Rs.100,000 and a retirement age of 60, there would be 20 years of active service left. One can now simply multiply Rs.12 lakhs yearly x 20 times. This will give you a life insurance need of Rs.2.4 crores.
Of course, we can stop here but there are some key parameters ignored here, and we could adjust this figure further to make it more appropriate. One smart way to do that would be to consider the adjusted investment interest rate which is calculated as [ (1+ returns) / (1+ inflation) – 1). This factor will adjust your figure for returns earned on the insurance kitty investment and the inflation over time. The idea is to discount the above figure of 2.4 cores for 20 years with this factor. Assuming 8% returns, 6% inflation, Rs.2.4 crore divided by the adjusted investment interest rate of 1.89% for 20 years [(1+1.89%)^20] would give you a kitty of Rs.1.65 crores which sounds more reasonable.
Under this approach, it is assumed that the policy money will be invested and the income/withdrawals from this investment should be sufficient to finance your expenses over the foreseeable future. Note that in the previous method we will consider the entire net income and here we are only considering a part of it which goes towards financing household expenses.
Let us see this with an example. Your monthly expenses are said Rs.50,000 amounting to Rs.6,00,000 yearly. With a withdrawal rate of 4%, the corpus needed would be Rs.1.50 crores (Rs.6,00,000 divided by 4%). The 4% is borrowed from the very popular rule under which people use this 4% to calculate retirement kitty. This can be applied here also. To be on a safer side, the withdrawal rate of 3% would give us Rs.2 crores (Rs.6,00,000 divided by 3%).
This is a more detailed method of calculating the life insurance need. Here we consider all important elements like the earning years remaining, the present net income, the estimated income rise, the present liabilities, and the major financial goals the person is expected to achieve during this lifetime. We present the method here not to tempt you to calculate but to at least help you understand the concept.
Step 1: Calculate the present value of net income: In this step, the present value of all future net cash flows is arrived at. To arrive at the net income, we will consider the adjusted investment interest rate as calculated above. One may consider a growing income here while calculating the figures.
Step 2: Add present values of all future life goals: In this step, the present value of all future goals like child education, purchase of a home, marriage for the girl child, etc., is considered. We need to arrive at this figure by dividing each goal amount with the adjusted investment interest rate for the years remaining.
Step 3: Add all the existing loans/liabilities (less) assets: To the above-calculated figure, we need to add all existing loans/liabilities. This would include all home/car loans, credit card bills, personal loans, etc. This figure will be reduced to the extent of any existing assets that you have so that the life insurance need is reduced to that extend.