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11 Best Personal Finance Metrics You Need To Track

Baptiste Wicht | Updated: |

(Disclosure: Some of the links below may be affiliate links)

Personal Finance Metrics are essential! They will allow you to track your progress to success in your personal finances. Metrics are easy to compare, and you can work on improving them one after another.

Metrics are essential if you are on a journey toward Financial Independence. You will need to track and improve many metrics to become Financially Independent. But just tracking a metric is meaningless. This metric should improve over time. Or, at the very least, you need to ensure this metric does not get worse.

In this article, I list The 11 Most Important Personal Finance Metrics you can find. If you track these 11 personal finance metrics and you work on improving all of them, you will be well ahead of the majority of people who probably do not track more than one or two of these personal finance metrics.

1. Income

There is no denying your income is important! The more income you get, the easier it will be to manage your personal finances. And if you want to reach Financial Independence, your speed will be relative to your income.

There are several ways of calculating income:

  • Gross Income: This is what is on your employment contract. Your gross income is what you are generally discussing with your company.
  • Net Income: This is what you receive monthly on your bank account.
  • Net Income After Taxes: This is the Net Income minus the taxes you pay.

For most things, the Gross Income is a useless metric. For instance, for me, about 7% of my Gross Income goes to direct taxes. But for some people, it is more than that. There is no point in considering the money that you will never receive. You only want to consider the money that you can use!

Some people use Net Income After Taxes and do not consider taxes an expense. The taxes are simply an expense, and I only consider my Net Income. But both metrics are fine.

To optimize these crucial personal finance metrics, you need to increase your income. Now, there are ways to grow your income. To improve the status of your personal finances, increasing your income can go a long way.

2. Expenses

Your income is important, but it is useless if you spend it all. A substantial income is only interesting if you save some money.

Therefore, the amount of your monthly expenses is significant. You need to know how much you are spending month after month and year after year.

Something that not many people consider is that your expenses will change a lot from month to month. You will spend more the month when you buy these airplane tickets. Therefore, the absolute value of your monthly expenses is not very interesting. The average monthly expense total is something much more enjoyable.

Ideally, you also want to ensure that the data from your yearly expenses is relevant. For example, if you buy a car every ten years, you do not want to take that particular year as the base for your monthly expenses. If you want a precise estimation, you can take the average yearly expenses over the last five years and average it again for your monthly. Your average expenses should give you a good picture of your spending.

To optimize your expenses, you need to reduce your spending. For instance, you could find some expenses that are not necessary anymore. Or find things you could get cheaper than you get them now. An easy budget to slash is your food budget. Most people can easily reduce it by shopping at another shop.

3. Personal Inflation Rate

The inflation rate tells you how prices of goods are increasing or decreasing, year after year. Every country measures inflation in its economy. It is an important economic metric.

However, it may not relate to you. It is calculated based on the average of all the households in your country. What you want is your personal inflation rate. It is the rate at which your expenses are increasing year after year.

It is straightforward to compute. You take the sum of your current yearly expenses divided by the sum of your expenses of the previous year. You subtract 1 to that number, and you will get the inflation for this particular year.

For instance, these are some of our personal inflation rates in the past:

  • 2015: -7.4%
  • 2016: +16%
  • 2017: -7%
  • 2018: +12%

As you can see, we are not an excellent example of inflation. Our expenses are all over the place. Even in 2018, when we watched our expenses quite carefully, we had a 12% inflation rate!

When considering your personal Inflation Rate, you must be careful about some events in the years. For instance, in 2018, we got married, adding a lot of expenses.

Here I have described the global inflation rate of your spending. You can also compute your personal food inflation rate, for instance, or your personal holiday inflation rate. You can be creative and calculate it for any expenses in your budget.

Generally, it is bad if your expenses increase year after year at a higher rate than the inflation in your country. Ideally, you do not want your expenses to increase. Ideally, you want your personal inflation rate to be below inflation. Your personal inflation rate is another way to keep your expenses on track!

4. Savings Rate

If you know your income and your expenses, it is then trivial to know your savings rate. For me, The Savings Rate is one of the most critical Personal Finance Metrics.

Your Saving Rate will tell you how much of your income you are saving. It is straightforward to compute. Your Savings Rate is equal to (Income – Expenses) / Income. So, for instance, if you earn 4000 USD and spend 3000 USD, your savings rate will be 25%.

Generally, you compute a monthly savings rate. However, you can also calculate a yearly savings rate. Take the yearly income and expenses and compute the savings rate. Or you can also take the average of the last 12 monthly savings rates. These two numbers are both interesting, but they are different. You just need to be aware of that.

At the very least, your savings should be positive. I firmly believe that everybody should have a savings rate of at least 10%. If you want to reach retire early, you will need to save significantly more than that. With a higher savings rate, you will become Financially Independent faster.

If you want to improve your savings rate, there are two things you can do: grow your income or reduce your expenses. Both will have a substantial effect on your savings rate. I am doing both to improve my savings rate. When I started this blog, I had an average savings rate of 10%! Now our average savings rate is about 45%!

5. Net Worth

Your Net Worth is an essential personal finance metric. Your net worth will tell you how much you own if you put all your money together. Your net worth is an excellent indicator of wealth.

Of course, it can tell you how much you could spend. But more importantly, it could tell you how far, or how close, you are to Financial Independence. That is why you will see the net worth mentioned in all Personal Finance blogs.

Computing your net worth is not very difficult. First, you need to sum the value of all your assets:

  • Bank accounts
  • Broker accounts
  • Your house or other real estate properties
  • Retirement accounts

And then, you need to subtract your liabilities:

  • Mortgage
  • Credit card debt
  • Car debt
  • All your other debts

This formula will give you your net worth. For more details, I wrote a guide on how to compute your net worth.

Be aware that it is not always easy to compare your net worth with that of other individuals. A good net worth value will be different from country to country. How good is your net worth also depends on the cost of living. If you are happy about your net worth, do not let anyone else deter you!

There are two main ways to increase your net worth. The one you should focus on directly is to decrease your liabilities. For this, you need to pay off your debt. You do not always have to pay all your debts before investing. For instance, a low-interest mortgage is not as bad as a high-interest credit card debt. Personally, the only kind of debt I would consider keeping is a mortgage. All the other debts are avoidable.

Second, you can increase your assets. All the money you are saving inflates your net worth. But this will take a long time unless you have a substantial income and a significant savings rate. The way to make it faster is to invest some of your money. There are many ways to invest your money. You could invest in the stock market, in a company, in real estate, or in anything that appreciates. Investing will significantly accelerate the growth of your net worth.

6. FI Number

You are Financially Independent when you have enough savings or passive income to cover your expenses for life.

If you base your Financial Independence (FI) on your net worth, then your Financial Independence number, or FI Number, is the net worth you need to accumulate before becoming financially independent.

The standard rule for Financial Independence is the 4% rule. In that case, you need to accumulate 25 times your running expenses. For instance, if you spend 50’000 USD each year, your FI number will be 1.25 million USD. Once your net worth is equal to or higher than your FI number, you are financially independent. That means you can withdraw 4% of your net worth, adapted for inflation, every year and cover your expenses. And your investment returns should make it so you can withdraw this money forever.

Now, it is not always as simple as that. For example, some people do not use a 4% withdrawal rate. And it is sometimes difficult to know how much you will spend in retirement. And if you get some guaranteed income like a pension, you can reduce your FI number accordingly.

If you want all the details about this metric, read this guide on how to compute your FI number.

7. FI Ratio

Another important personal finance metric you want to track is your Financial Independence Ratio or FI Ratio. This ratio will tell you how close or far you are from being financially independent.

This number is elementary to compute. It requires that you know your Net Worth and your FI Number. Once you know these two numbers, you can simply divide your Net Worth by your FI Number, and this will give you the percentage of your progress toward FI.

For instance, if your FI number is one million and you have 120’000 USD, your FI ratio will be 12%. So that means you have done 12% of the journey towards Financial Independence.

Increasing your FI ratio can be done by increasing your Net Worth or reducing your FI Number. The first case requires you to save more money or increase your income. And the second case requires you to spend less or increase your passive income. So, as you can see, all the metrics are related!

For more examples and details, read this guide on computing your FI Ratio.

8. Passive Income

I have already talked about Income as a personal finance metric. However, there are different kinds of income. Passive Income is a subpart of your income that is especially interesting.

Passive income is something that you earn without doing anything. There are many forms of passive income.

The most used passive income is dividends from the stock market. If you invest in the stock market through a passive index fund, you will receive some interest payments quarterly. That means that by doing nothing, your investments will pay off!

Another well-used form of Passive Income is Real Estate. If you own some piece of Real Estate and you rent it to someone, you can earn some money month after month. It is not entirely passive income since you must maintain your property and find renters. But it can be more passive if you hire a property manager to do some of the work.

Many people also say that a blog is a passive income. But I would agree that it is not passive at all. Most bloggers spend a lot of time on their blogs every day. So blogging is not passive at all.

The advantage of passive income is that it should last until after you retire. And you can use passive income to cover some of your expenses. That means that all your passive income should consequently reduce your FI Number. Developing some passive income streams can make your road to Financial Independence significantly faster!

9. Investment Fees

An essential personal finance metric is the investment fees that you are paying. It represents how much you pay each year on your invested money.

Minimizing investing fees is extremely important. Most importantly, do not underestimate the importance of these fees. If you have an investment portfolio worth 200’000 USD and 1% of fees on it, you are losing 2000 USD every year! Cutting it down to 0.5% could save you 1000 USD per year. And this becomes more and more important as your net worth is growing.

The primary way to reduce your investment fees is to only invest in low-cost passive index funds! I only invest in passive index funds, and my total investment fee is less than 0.1%. Since you invest this money, it will compound year after year. And compounding is a powerful tool!

Do not make the mistake of minimizing the importance of your investment fees. Optimizing investing fees is something you should focus on early in your investing journey!

10. Asset Allocation

You should always keep track of your asset allocation! When you start investing, you need to choose your target asset allocation. Your target asset allocation is how much you allocate to bonds and how much you allocate to stocks. For instance, I am trying to allocate 80% to stocks and 20% to bonds.

And you can take your target asset allocation a bit further by integrating your portfolio allocation. For instance, my allocation of 80% of stocks is divided into 80% World and 20% Switzerland.

You need to take your target asset allocation seriously. If your situation changes, you must ensure your asset allocation is still valid for the new situation.

There is another thing you need to track is your current asset allocation. Your target asset allocation is what you have decided to invest in. Your current asset allocation is what you are invested in. It is the current allocation of all the positions in your net worth. For instance, even though my target allocation to bonds is 20%, at this time, my current allocation to bonds is more than 30%. So, I still need to invest more in stocks to balance my net worth.

Tracking your current asset allocation and ensuring it follows your target asset allocation is essential to your investments. You do not have to track it every day. You should not track it every day. But ensuring once a month of where your net worth is going is essential!

11. Emergency Capacity

And last but not least, your emergency capacity is one of the most important of your personal finance metrics. This metric will tell you how equipped you are to deal with an emergency money issue.

When an emergency occurs, you do not want to sell shares of your investment portfolio to cover the unexpected expenses. Instead, most people will recommend a large emergency fund to cover these expenses. However, an emergency fund is not the only way to react to an emergency.

In your emergency capacity is also the amount you can pay by credit card. For instance, I have a 10’000 CHF limit on my credit card. That means that with my emergency fund of 10’000 CHF, I have 20’000 CHF available in case of emergency before I would need to sell any shares.

You do not need a very high emergency capacity, but you must have some. If you do not, you may be in big trouble. You can count on your emergency fund and credit cards to cover your emergency expenses. The sum of your line of credit and your emergency fund is your Emergency Capacity.

Bonus: How To Track Personal Finance Metrics

Now that you know all these helpful Personal Finance Metrics, it may be worth discussing how to track them.

You do not need any specific tool for this. You especially do not need a commercial tool to do that. You can do it on paper. It will be fine if you do not lose the papers and all the data.

Even though doing it on paper is fine, I would recommend using a Spreadsheets tool for that. If you have Excel, you can use it. But you can also use Google Sheets, which is free. Just put all your metrics there. Then, for each new month, add a new column with the month. You will then have a nice view of how all these metrics evolve. And if you feel like it, you can add graphs and custom formulas to make it fancier. But only having all your metrics in a nice spreadsheet will already help you a lot!


There are many personal finance metrics that you can track. I believe that everybody should be aware of these metrics. And people that are trying to become financially independent should track all of these!

Not only should you track these metrics. But you should also try to improve these metrics. I have outlined ways to improve each of the 11 personal finance metrics in this article.

Several of these personal finance metrics are interlinked. For instance, if you improve your income, you are likely to improve your savings rate. And if you increase your net worth, you will increase your FI Ratio. And there is also some correlation in their growth rate. Increasing your savings rate will increase the rate at which your net worth grows, for instance.

There is no perfect number for any of these metrics. Therefore, you can always work on improving these personal finance metrics. However, at some point, you will have to be content with yourself. You must also consider how much time and effort you invest to improve these metrics. It may be worth spending one hour a week to improve your savings rate by 10%. But it is hardly worth it for less than a 1% increase in your income.

To ensure you are keeping track of these Personal Finance Metrics, you can make it a part of your personal finance routine. For example, take a look at my monthly personal finance routine.

What about you? Which personal finance metrics do you track? Do you have other examples of metrics?

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Photo of Baptiste Wicht

Baptiste Wicht started in 2017. He realized that he was falling into the trap of lifestyle inflation. He decided to cut his expenses and increase his income. This blog is relating his story and findings. In 2019, he is saving more than 50% of his income. He made it a goal to reach Financial Independence. You can send Mr. The Poor Swiss a message here.

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12 thoughts on “11 Best Personal Finance Metrics You Need To Track”

    1. Hi Patrick,

      Wow, 20 worksheets, that’s impressive. What are you tracking?

      Now, I use my real expenses in all my tracking. This allows me to compute our personal inflation rate, which takes into account real inflation and our lifestyle inflation.

      1. There’s one for each month, then I have one with a general overview of the budget (and to calculate my personal savings rate), one for the yearly comparison (also with the current year and with monthly average to compare it to the past years), one with all the data collected from the month, one that visualizes some of the data in graphs, one with an (yearly) overview of my total net worth, one showcasing several FIRE scenarios (e.g. showing the AHV payment I have to pay or the regular income tax based on the dividends), and one to calculate my personal discount by using the Coop Supercard (e.g. with all the bons and the points I earn).

  1. Great article, though I would push back a little on #9. Investment fees, while important to be aware of, shouldn’t *necessarily* be minimized. In your case, investing in low cost passive index funds, you’re also effectively limiting your upside growth potential.

    As a counter example, in the world of startup investing, LPs (limited partners, or investors in the funds) usually pay 2% AND 20% of all profits. That’s a HUGE fee — but it’s very worth it because of the potential outsized returns startups can have if chosen smartly.

    Just some food for thought from a Venture Capitalist who loves the world of finance. Keep up the great posts!

    – Andrew (@awertheim)

    1. Hi Andrew,

      That’s correct that if you want to invest in things with potentially huge returns (and potentially huge losses), fees will quickly be higher.
      However, since I advocate for stock investing, minimizing fees makes a lot of sense for my readers.
      But obviously, we are not going to get rich by passive investing and minimizing fees.

      Thanks for sharing :) I didn’t know it would be that expensive for investing in startups.

  2. Great article. You have now given me two financial metrics to add to my spreadsheet. Had not considered the Personal Inflation Rate. Check. Most of our investments are in Vanguard Index funds and Federal TSA. Both are pretty low. However, as we approach retirement, we will probably want to consolidate in one or the other. So, in 2020, I also will look at research adn comparing those accounts. Happy New FI Year!

  3. Love how straightforward and useful this article is. I’d say I’m doing OK with the majority of finance metrics except for personal inflation rate, investment fees, and asset allocation. For example, we figured out 70% of our net worth is in our paid-off house (oops). How we look at our FI ratio largely depends on how we take into account our house vs. our investments when tallying up our net worth… Savings rates get tricky too depending on if we count what we save on the side ourselves or if our employer’s matches can be figured in or if I will get a pension. There’s a lot to keep track of! This simplifies it well though.

    1. Hi Savvy History,

      Thanks for the kind words!

      Yes, a house can make it more difficult to get the metrics right. For the FI ration, I would not put my house into it. You are leaving in your house and therefore cannot really sell it without buying a new home. And if you decide to rent after you sell, you will probably have to increase your expenses for the rent.

      And the savings rate can be really tricky indeed. There are many ways to compute it and they all give different results. I have an article planned about that.

      For us, our savings rate is still too low and our expenses are still too high. But we are slowing getting there. And our FI ratio is really low.

      Thanks for stopping by!

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