What is your investing growth rate?

Published: February 9, 2016 at 8:21 am

Last Updated on

Do you know what your investing growth rate is? No, I am not asking about your investment growth rate or CAGR. I am referring to your investing CAGR – the rate at which your investments have increased over a period of time.

When I made my first retirement calculator about 6/7 years ago, the first thing I realized was  the importance of adding the rate at which investments increase as an input. There is a ‘good side’ to this and a ‘bad side’ to this. Which is what I would like to discuss in this post.

The wealth we create is primarily determined by how much we invest.

Here is a comparison of a constant SIP of Rs. 5000 in ICICI Prudential Discovery Fund versus a step-up SIP of Rs. 5000 increasing each year by 10%.

step-up-3

A systematic investment is a simple way to generate a corpus. A systematic increase in the systematic investment helps build a much bigger corpus.

Download the Step-up SIP Calculator  

Download the Step-up SIP Backtesting Simulator

Now here is something even more amazing (at least for a start).

A 30 year requiring 30,000 a month in todays money 25 years later, needs to invest about 50,000 a month to create a retirement corpus

Assumptions: inflation – 8%, equity return =12%, debt return – 8%, post-retirement portfolio return =8%, 25 years in retirement. Chosen just for illustration. You are enter more reasonable inputs here: The low-stress retirement calculator (hopefully!)

Not many people can invest more than they spend and that too just for retirement! So an attractive alteranative is to assume that we can invest more gradually.

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For the above inputs, if I assume a 5% increase in investment, the initial monthly investment drops to ~33,500. For a 10% increase, it becomes ~20,500!  Hang on a minute! What is the catch?

growth-sip

For the first 10 years or so, this approach looks better than the constant investment method. After that …! Every ten years or so, the investment amount must be doubled!

So this will work only if income increases at a decent pace and new recurring expenses (lifestyle creep) are manageable.

I have been adopting this approach since 2010-11 – about 10% increase in investment for all financial goals each year. So far I am fortuitous enough to have an investing CAGR better than this 10%, but it has been tough and will continue to remain so.

Someone said that the ‘best vice is advice’, but I will stick my neck out and a jot a few thoughts for young earners to ponder:

  • invest as much as possible when you don’t have expenses related to health (typically that of parents)
  • increase the investment amount as often as possible.
  • If can keep this up for the first 5/6 years of your career,
    • you could with retire early or
    • not be affected if investment decrease due to reasons beyond your control down the line

In other words, make hay while the sun shines.

You can calculate your investing CAGR in the following way

Suppose you invested 15,000 a month, 5 years ago and you are not investing 24,000 a month,

investing CAGR=(24000/15000)^(1/5)-1 ~ 10%

Do give this a try and check if that rate of growth is sufficient for your financial goals.

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Pattabiraman editor freefincalM. Pattabiraman(PhD) is the founder, managing editor and primary author of freefincal. He is an associate professor at the Indian Institute of Technology, Madras. since Aug 2006. Connect with him via Twitter or Linkedin Pattabiraman has co-authored two print-books, You can be rich too with goal-based investing (CNBC TV18) and Gamechanger and seven other free e-books on various topics of money management. He is a patron and co-founder of “Fee-only India” an organisation to promote unbiased, commission-free investment advice.
He conducts free money management sessions for corporates and associations on the basis of money management. Previous engagements include World Bank, RBI, BHEL, Asian Paints, Cognizant, Madras Atomic Power Station, Honeywell, Tamil Nadu Investors Association. For speaking engagements write to pattu [at] freefincal [dot] com

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2 Comments

  1. Thanks Pattu Sir for this post. I have seen many posts which talk about increasing SIP but none have talked about computing the investment CAGR. This is so insightful. Only thought here is should we actually start putting money in index funds as with increasing SIP, what if we end up increasing stakes in a fund which falters after a few years? Separately, would request you for an article on how to re deploy cash from a fund which is not doing well. Some people say stop SIP but don’t redeem. Others say redeploy in a new fund through STP…Wanted to know what is the impact on wealth creation. I remember in one post you were cautioning against frequent tinkering of portfolios…Thanks Sir

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