How to Compute your Wealth Discipline Ratio (WDR)
Hi Friends, I was looking for a personal finance thread in Team BHP but couldn't find any, so I felt this thread would be the most appropriate to post this topic.
What is the most important number in personal finance?
I came across this article in early 2021 and started calculating my WDR ratio starting 31/3/21 :
https://ofdollarsanddata.com/wealth-discipline-ratio/.
Instead of talking Net worth and Wealth in absolute terms, this methodology of calculating the WDR seemed more practical and logical to me.
The article initially talks about the Lifetime Wealth Ratio (“LWR”) - a concept invented by the financial blogger J. Money at Budgets are Sexy back in 2015.
J. Money defined the LWR as: Lifetime Wealth Ratio = Net Worth (NW) / Total Lifetime Income (TLI)
Apparently, in the US it is easy to get the TLI using your Social Security Number and using the above formula you can get the LWR. So, US residents would find it a bit easier.
In the original article, J. Money provided his own rankings for how to interpret your LWR:
- 0%-10% – Meh
- 10%-25% – Now we’re cooking!
- 25-50% – You’re on fire, baby! Give me your number!
- 50-100% – Marry me.
- 100%-1,000% – How do I get into your will?
Despite how unscientific his ranking system is, this is a far better way of determining your financial competence than just the Net worth.
Your net worth is a stock (i.e. a snapshot of your accumulated wealth) while your income is a flow (i.e. a measure of how your wealth is changing through time). They are both great, but limited.
LWR, on the other hand, controls both the stock (i.e. your net worth) and the flows (i.e. your total lifetime income) in your personal finances, to judge your financial skill. It is basically a measure of how good you are at converting your income (a flow) into wealth (a stock).
LWR allows you to benchmark the two most important things in personal finance (your saving ability and your investing ability) at the same time. If you are a good saver or a good investor (or both), you will have a higher LWR than someone who isn’t.
However, LWR has three major flaws:
1. LWR is skewed against young people simply because they have had less time for their assets to compound. It is basically impossible for a young person to have a LWR above 100% unless they got extremely lucky with their investment portfolio. Why? Because after paying taxes, how else could someone have a net worth more than the income they took home?
2. LWR is biased against high earners who have to pay higher taxes. For example, if you made $500,000 when you were 22 and lived like a total hermit, you might be able to save $250,000 as a result. That is a LWR of 50% despite being an incredibly good saver. Even though this person in the top decile of financial responsibility he only scored a 50%. The issue is that the LWR penalizes those individuals who pay more in taxes.
3. LWR is the least useful for anyone who has had low income for a long period of time. Why? Because, as the data shows, those with low income spend basically all of their money on the necessities (food, rent, etc.) Without extreme saving measures, it is very difficult for these people to build wealth. This is why the LWR isn’t a great measure of their financial skills because having low income for a long time will just add deadweight into the denominator of the LWR.
Given these limitations, is there a way we can adjust the LWR into a slightly more useful metric? Yes, this is where The Wealth Discipline Ratio comes in!
The Wealth Discipline Ratio™ (“WDR”)
The author of this says, WDR is identical to the LWR, except we should remove some level of basic spending from our income each year, because everyone has to spend some money on the basic necessities to get by. Therefore, we should remove this “necessity spending” from your total lifetime income because there is no way you could’ve saved or invested that money. The author's theory is that money that you never had a chance of saving or investing should not count against you when it comes to building wealth.
However, money that you could have saved/grown should be counted. This is why this measure is called the Wealth Discipline Ratio, because it looks to answer the following: Of every Dollar/Rupee in wealth that you could have built through saving + investing, how much did you actually build?
This is a measure of your financial discipline through both savings and investing. It’s not just your savings rate, because it also incorporates how you use your savings to invest and increase your wealth.
The WDR is defined as:
Wealth Discipline Ratio = Net worth (NW) / (Total Lifetime Income (TLI) – Basic Lifetime Spending (BLS))
Unfortunately, there is no perfect way to calculate basic lifetime spending, but we can make some assumptions to get started.
What’s the right amount? This is where your financial discipline comes into play.
How to compute the WDR in the India Context?
This is the methodology that I used to calculate my WDR:
1.
Net Worth (NW) as of March 31st can be worked out easily and some of us do this for declaring the Assets & Liabilities Sheet/Balance Sheet as part of our IT filing. Since we are nearing March 31st, you can compute this and keep it ready as of 31/3/2025. Fortunately, only the latest NW is required for this ratio.
2. Total Lifetime Income - For this, I took the
Gross Total Income (GTI) (which is same as TLI) from my Income Tax Returns since the time I had been filing returns. You need to take the GTI for every financial year since the time you have been working. So, those who have just started their career would find it easier to start computing the WDR. Others, will have to do some homework of digging out your old IT returns. No pain, no gain, right?
3.
Basic Lifetime Spending (BLS) - As a family of 3, we have been tracking our spends in an excel sheet from FY 2007-08 onwards, so I was able to take the BLS from there for each financial year. For years before that, I used the ratio of BLS/GTI (Cumulative BLS and Cumulative GTI from 2007 to 2024) and applied that % to each of years prior to 2007 till the time I started working. So, if you don't have BLS for every year, you may want to do the same to arrive at a % and apply it for those missing years. I did go through some posts in this thread and I am sure many of you tracking your expenses already, so calculating BLS should not be a problem.
After doing the above exercise, I created an excel sheet to tabulate NW, GTI and BLS for each year of my career and I computed my WDR (and also LWR) and I am tracking the same for the last 4 years. My WDR has been increasing every year thereafter. What is the ideal WDR?
Unfortunately, the author thinks there is no ideal WDR, but it can still be useful for understanding your financial history.
For example, if your WDR is less than 10%, you are probably living a “you-only-live-once” kind of lifestyle and you may want to consider saving/investing more. However, this doesn’t imply that a higher WDR is always better. In fact, a very high WDR (100%+) might be a sign of someone who is prioritizing money over living a more fulfilling life.
WDR can provide some good insight into what you are doing with your money and how you might be able to change to reach your financial goals.
Because the only thing that matters in personal finance is whether you can live the life that you truly want. If you can, then, financially, you have won. If you can’t, then what do you need to change to get there? Perhaps, increasing your wealth discipline ratio is a good place to start.
The intention of this post is not to publish my WDR or for any of you to do so after computing yours. I just found this method useful to see whether I am on the right track in my personal finance journey and hence wanted to share it with a wider audience.
Thanks for reading!
Cheers!