How To Calculate Your Rate of Return

Understanding your rate of return (ROR) is critical to understand your portfolio performances. There are just too many ways to do math with stocks but there is only one way to truly calculate the performance of a portfolio.

I have never been happy with the ROR calculation of Quicken and always questioned the numbers. More importantly, how do you calculate an accurate rate of return with your shares re-invested?

I am sure there is a generally accepted accounting procedure for the ROR and I know there is one from a tax perspective but I have decided to follow the following rules:

  1. It’s based on the money I invest and not the shares I purchase. That means the math starts counting once I transfer cash into the account and not when I buy a stock.
  2. It’s based on the value of the account including cash and not the value of the shares. It’s the final number at the bottom of your statement.
  3. Stock investments, mutual funds or even GICs are investment vehicles to increase the overall value of the portfolio.

Rate of Return Variations

Assessing Your Profit

Let’s define how you assess your profit. I think it’s important to understand how to calculate your profit since it can be calculated differently and the total value of your portfolio takes into account your profit.

Profits with GIC

profit = (principal + interest) – principal

The principal is your initial amount and the interest is what you earn from your investments.

Profits with Stocks

profit = (principal + capital gains) – principal

The principal is your initial investment and the capital gains are the profit (or loss) from your investment. Your capital gain is defined by the following formula: shares count * (market value – purchase price). If you sold the stock then it’s the selling price otherwise it’s a paper capital gain.

Profits with Dividend Stocks

profit = (principal + capital gains + dividends) – principal.

The same definition as above apply with the addition of the dividends you have earned. The principal would be the initial share purchase times the purchase price and the capital gains would be calculated with the initial share count as well. The dividends would be from the dividends earned (even if they are re-invested).

I kept this one for last as in a tax-free account, the gains are simple but in a non-registered account, you have to take into account the taxes you have to pay. I am however keeping it simple right now and disregarding the taxes.

A Simple Way To Calculate your Account Rate Of Return

For the longest time, I thought I needed to track all my transactions to get an accurate picture and that’s a lot of work. Let’s just be realistic. With dividends coming in every month and some of them with a DRIP, the accounting of every transaction across multiple accounts can become quite a chore. I already have to do that for tax purposes in non-registered accounts but it’s not something I want to do with all the accounts.

I needed to think about it differently and ignore the actual investments I have. It’s like a black box inside and I focus on the money I put in and how much it’s worth overall. Some of it is invested and some of it is in cash. All the matters are the following:

  • When and how much is invested
  • The total worth of the account

I decided to manage it by account but you could do it for your overall portfolio since you have the transactions for each account. The trick is simple as all you need to do is use the XIRR function of Excel or Google Spreadsheet. Let’s use the TFSA as an example since most will be familiar with the account. The total for the day is simply using today’s date and my total value of the account as a negative value. It has to be negative for the XIRR formula to work.

Rate of Return Calculator

In the example above, I basically have an annualized return of 11.51% in my TFSA account. I hope to double the value within 7 years and to do that I need at least 10% annually when using the rule of 72.

If you withdraw from your TFSA, just enter is as a withdrawal with the appropriate transaction date and your annualized return will adjust accordingly. What I have done is track the amount of money I put in the account as opposed to the individual investments and it’s much simpler that way.

Step by Step Instructions

No matter what, the pen and paper should be put aside in this digital age in favor of using a spreadsheet. You can use Google Sheet or Excel and set up a comprehensive portfolio tracker with this post as a guide.

DISCLOSURE: Please note that I may have a position in one or many of the holdings listed. For a complete list of my holdings, please see my Dividend Portfolio.

DISCLAIMER: Please note that this blog post represents my opinion and not an advice/recommendation. I am not a financial adviser, I am not qualified to give financial advice. Before you buy any stocks/funds consult with a qualified financial planner. Make your investment decisions at your own risk – see my full disclaimer for more details.