what is yoy growth

YOY (Year-Over-Year): Why Should You Care?

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Review by 
Hoang Tran

Full Bio

Ms. Frances Dang is a visionary CPA, Partner at XOATAX, and a Tax Expert for many high-net-worth clients and corporations. She specializes in both minimizing tax liabilities and driving sustainable growth. Over 7 years of dedicated service, Ms. Frances has provided personalized planning for high-net-worth clients including business owners, investors, and entrepreneurs spanning manufacturing, e-commerce, biotechnology, fintech, services, and non-profit sectors. 
Kevin Zhang renowned CPA and Tax Expert with over 15 years working in tax planning and financial optimization for individuals and large businesses. He excels in analytical abilities and innovative problem-solving, identifying tax minimization opportunities, and providing strategic recommendations to leadership teams.
Hoang Tran  is an accomplished CPA and financial advisor with over 8 years of experience. He specializes in providing tailored financial solutions, tax optimization, and strategic guidance to individuals and businesses. With a client-centric philosophy and a commitment to continuous learning, Hoang has earned a reputation as a trusted expert in personalized financial strategy. His expertise has helped businesses across diverse industries, including manufacturing, import & export, and wholesale & distribution, achieve their financial success.

You’re probably sitting there right now, coffee in hand, looking over your company’s financials and wondering what you could do to make a difference in the future. Perhaps you’re in the middle of a quarterly report or thinking about the upcoming budgeting season.

And then, you hear that buzzword, that acronym that keeps popping up everywhere – YOY. Year over year growth. It’s important. It’s crucial. It’s a game-changer. But why should you care? Let’s take a journey to uncover the answers.

Key Takeaways

  • YOY stands for year-over-year and is an essential financial tool that helps you track your business’s performance compared to the time period.
  • YOY helps identify trends, provides valuable context, and can be used for forecasting future performance.
what is yoy

What is Year-Over-Year (YOY)?

Year-Over-Year (YOY) is a powerful tool compared to the same period a year earlier in your financial analysis toolbox.

Let’s say you’re comparing your company’s financial performance during the fourth quarter of 2023 to the fourth quarter of 2022 – that’s YOY in action. It’s a snapshot that accurately shows your company’s revenue growth or declines over time.

Year-over-year comparisons are about understanding the journey of your business. It’s about tracking patterns, identifying trends, and seeing how your company evolves.

You may also like: How to Take Advantage of Balance Sheet for Your Business

You’re not just comparing this year’s Christmas sales to last year’s; you’re looking at how your business model affects those numbers and how your strategies are playing out in the real world.

At its core, YOY is about asking the right questions. Did our new marketing strategy improve sales over the last year? Has the new product line been successful?

YOY provides you with the data to answer these questions and much more. It’s an invaluable tool for any business, regardless of size or industry.

5 Reasons YOY is Important to Your Business

Imagine you’re a sailor navigating the high seas. You wouldn’t set out on a journey without a compass, would you? YOY analysis is the compass for your business, guiding you through the choppy waters of financial forecasting and strategic planning. Here are five reasons why YOY is vital to your business:

  • YOY is your performance tracker: It allows you to measure your company’s performance over time. It’s like a business health check, indicating whether your company is growing, stagnant, or declining.
  • YOY gives you context: It offers a nuanced understanding of your company’s current financial performance by comparing it to past performance. This is especially useful in industries prone to seasonal fluctuations or cyclical growth patterns.
  • YOY helps identify trends. Spotting trends can be like finding a needle in a haystack. However, YOY makes it easier by painting a clear picture of your company’s financial performance.
  • YOY is a forecasting tool: By examining YOY data and identifying trends, you can make informed predictions about your company’s future performance. This metric can be beneficial in budgeting and strategic planning.
  • YOY enables benchmarking: By comparing your company’s YOY results to industry averages or competitors, you can gauge your company’s performance against others in your industry. So it can inform strategic decisions and improve competitiveness.
year-over-year yoy

Examples of How YOY Growth is Applied

Let’s look at how YOY growth is applied in different time frames – monthly, weekly, and daily.


Consider a fictitious retail company, ‘RetailCo,’ and its sales numbers. Here’s a table with its monthly revenues:

Month Sales
Jan ’23 $10,000
Feb ’23 $12,000
Mar ’23 $13,000

Now, let’s calculate the YOY growth for February:

YOY growth = (($12,000 – $10,000) / $10,000) x 100 = 20%

So, RetailCo experienced a 20% YOY growth in sales for February.


Imagine a restaurant, ‘Foodie,’ and its weekly customer counts. Here’s a table with its weekly counts:

Week Customers
Week 1 100
Week 2 110
Week 3 120

If we calculate the YOY growth for Week 2:

YOY growth = ((110 – 100) / 100) x 100 = 10%

Thus, Foodie saw a 10% increase in customer counts in Week 2.


Let’s take an online business, ‘ShopOnline,’ and its daily website visits. Here’s a table with its daily counts:

Day Visits
Day 1 1,000
Day 2 1,200
Day 3 1,500

Calculating the YOY growth for Day 2:

YOY growth = ((1,200 – 1,000) / 1,000) x 100 = 20%

So, ShopOnline experienced a 20% YOY increase in daily website visits on Day 2.

yoy year over year

How To Calculate YOY Growth Rate

Calculating the YOY growth rate is a simple, straightforward process that can be broken down into clear steps. It’s like baking a cake; you need the right ingredients (in this case, financial metrics) and a recipe to follow. Here’s a step-by-step guide on how to calculate the YOY growth rate:

  • Step 1: Identify the financial metric you want to analyze. This could be revenue, net income, or other financial metrics like sales, profits, or customer counts.
  • Step 2: Calculate the value of this metric for the current year. For instance, if you’re analyzing YOY revenue growth, you’ll need the total revenue figure for the current year.
  • Step 3: Calculate the same metric for the previous year. Continuing with our revenue example, you’ll need the last year’s total revenue figure.
  • Step 4: Subtract the previous year’s metric from the current year’s. This gives you the absolute change in your chosen metric from one year to the next.
  • Step 5: Divide this absolute change by the previous year’s metric. This calculates the relative change as a proportion of the previous year’s metric.
  • Step 6: Multiply the result by 100 to get the YOY growth rate as a percentage.

Here’s what the formula looks like:

YOY growth rate = ((Current year’s value – Previous year’s value) / Previous year’s value) x 100

For instance, let’s take a software firm ‘SoftTech’, which earned revenue of $1,800,000 in 2024 and $1,500,000 in 2023. We can calculate the YOY revenue growth rate like this:

YOY revenue growth rate = (($1,800,000 – $1,500,000) / $1,500,000) x 100 = 20%

Thus, SoftTech experienced a 20% YOY growth in revenue. SoftTech can assess its business performance and plan for future strategies by calculating this.

yoy analysis

What is a Good YOY Growth Rate?

Determining a ‘good’ YOY growth rate isn’t always black and white. It’s like deciding what makes a good book – it depends on many factors. One company might consider a 10% YOY growth rate fantastic, while another might view it as below par.

An increased YOY growth rate is generally considered positive, while a decreased rate could suggest the need for improvement. However, it’s not always that simple.

For example, a company could have a lower growth rate. Still, the revenue quality might have improved due to factors like long-term contracts, lower customer acquisition costs, or reduced churn.

Also, remember that growth eventually slows down. As companies mature, they often focus less on growth and improving operational efficiency, retaining existing customers, and issuing dividends to shareholders.

In Conclusion

Navigating the world of business finance can feel like wading through a maze. But tools like YOY can help you find your way. By understanding your company’s performance compared to previous periods, you can make informed decisions that drive growth and success.

Ultimately, YOY isn’t just about crunching numbers. It’s about understanding your business, spotting trends, and making informed decisions. It’s about keeping your finger on the pulse and steering your business in the right direction.

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