Why Should You Invest?

Let's assume you’re earning ₹ 50,000/- per month and you spend almost ₹ 30,000/- for your cost of living, which includes housing, food, transport, shopping, medical, etc. The rest of the ₹ 20,000/- is your monthly surplus. To make it easier for us, we shall ignore the effect of income tax in this discussion.

To make it more lively, let us make a few simple assumptions like -

Let’s see how the cash balance will look in 20 years -

Years
Annual Income
Annual Expense
Cash Retained
1
6,00,000
3,60,000
2,40,000
2
6,60,000
3,88,800
2,71,200
3
7,26,000
4,19,904
3,06,096
4
7,98,600
4,53,496
3,45,104
5
8,78,460
4,89,776
3,88,684
6
9,66,306
5,28,958
4,37,348
7
10,62,937
5,71,275
4,91,662
8
11,69,230
6,16,977
5,52,254
9
12,86,153
6,66,335
6,19,818
10
14,14,769
7,19,642
6,95,127
11
15,56,245
7,77,213
7,79,032
12
17,11,870
8,39,390
8,72,480
13
18,83,057
9,06,541
9,76,516
14
20,71,363
9,79,065
10,92,298
15
22,78,499
10,57,390
12,21,109
16
25,06,349
11,41,981
13,64,368
17
27,56,984
12,33,339
15,23,644
18
30,32,682
13,32,006
17,00,676
19
33,35,950
14,38,567
18,97,383
20
36,69,545
15,53,652
21,15,893
Total cash after 20 years
17,890,693
If you look at these numbers, you would understand that the balance was tipping. Few things are quite startling from the above calculations -

After 8 years, what will you do when you run out of money?
How do you plan to support yourself?

Now let’s take a look at another scenario, where instead of stacking the cash you choose to invest the cash in an investment option that grows you about 12% per annum. Like in the first year you retained ₹ 2,40,000/-,instead of stacking you invested it at 12% per annum for 20 years which yielded ₹ 2,067,063/- at the end of 20th year.

Years
Annual Income
Annual Expense
Cash Retained
After Investment
1
6,00,000
3,60,000
2,40,000
20,67,063
2
6,60,000
3,88,800
2,71,200
20,85,519
3
7,26,000
4,19,904
3,06,096
21,01,668
4
7,98,600
4,53,496
3,45,104
21,15,621
5
8,78,460
4,89,776
3,88,684
21,27,487
6
9,66,306
5,28,958
4,37,348
21,37,368
7
10,62,937
5,71,275
4,91,662
21,45,363
8
11,69,230
6,16,977
5,52,254
21,51,566
9
12,86,153
6,66,335
6,19,818
21,56,069
10
14,14,769
7,19,642
6,95,127
21,58,959
11
15,56,245
7,77,213
7,79,032
21,60,318
12
17,11,870
8,39,390
8,72,480
21,60,228
13
18,83,057
9,06,541
9,76,516
21,58,765
14
20,71,363
9,79,065
10,92,298
21,56,003
15
22,78,499
10,57,390
12,21,109
21,52,012
16
25,06,349
11,41,981
13,64,368
21,46,859
17
27,56,984
12,33,339
15,23,644
21,40,611
18
30,32,682
13,32,006
17,00,676
21,33,328
19
33,35,950
14,38,567
18,97,383
21,25,069
20
36,69,545
15,53,652
21,15,893
21,15,893
Total cash
4,26,95,771

Letting money make money for us, this is what happened with your decision to invest the surplus cash, your cash balance has increased significantly. The cash balance has grown from ₹ 1.7 Crores to ₹ 4.26 Crores. This is an insane 2.4x times the regular amount. This translates to you being in a much better situation to deal with your post retirement life.

So this answers the question,

Why should you invest?

There are a few more other compelling reasons for one to invest like -