Year-Over-Year (YOY): What It Means, How It's Used in Finance

What is Year-Over-Year?

Year-over-year (YOY) is a technique for comparing two or more quantifiable events over a yearly period. It is part of key performance indicators used to compare a company's growth or performance yearly. Investors and analysts frequently apply this analytical tool to create accurate comparisons and evaluate long-term trends.

You can also assess a company's growth trajectory, spotting tendencies that may not be visible every quarter, especially in the fourth quarter. The YOY technique provides a clearer view of long-term performance, allowing investors to make more educated judgments. Furthermore, it helps to create reasonable expectations for future growth based on the company's past performance.

You can also check your own numbers with our free YoY growth calculator, which has presets for revenue, ad spend, supplier payments and other metrics.

Benefits of Year-Over-Year

There are countless benefits of using the YOY method. For starters, it provides a clear picture of a company's growth over a time period. By comparing data from different years, you can quickly identify trends, patterns, and cycles in a company's performance.

This approach also helps stakeholders identify specific strengths and weaknesses, allowing for more targeted YOY change and modification. Additionally, it aids in anticipating future performance by using historical data to improve the accuracy of business projections and strategies.

Moreover, YOY analysis eliminates the impact of seasonality on a company's performance, enabling you to make accurate comparisons. This is especially beneficial for businesses that experience significant seasonal fluctuations.

YOY calculations can also be applied to various aspects of a business, from revenue and costs to customer base and market share. This versatility makes it a valuable tool for business decision-making and strategic planning.

Furthermore, by analyzing YOY change in various business metrics, companies may acquire more data sets and a better understanding of their competitive position in the industry. This holistic approach allows for more informed and strategic decisions, which contribute to the business's long-term success and sustainability.

Year-Over-Year Financial Metrics

In this section, we explore how understanding the YOY meaning enhances our analysis of key financial metrics like COGS, revenue, and EBITDA.

COGS

Cost of Goods Sold (COGS) is an important financial measure which represents the direct costs of producing the goods sold by a company. YOY analysis of COGS can provide insights into a company's operational efficiency and pricing strategy.

A decrease in YOY COGS may suggest better procurement tactics, more efficient manufacturing processes, or cost-cutting actions that boost profitability. A year-on-year increase in COGS, on the other hand, could indicate growing material costs, inefficiencies, or shifts in the product mix towards more expensive commodities.

Companies that regularly track these patterns can make more informed pricing, cost management, and operational decisions. This level of analysis is essential to retaining a competitive advantage and safeguarding the long-term financial sustainability of the company.

Revenue

Revenue is the total income generated by a company from its business activities. YOY comparison of a company's revenue can help identify growth trends, evaluate the effectiveness of sales and marketing strategies, and make informed business decisions.

Positive year-over-year revenue growth indicates that a company is successfully extending its market presence and customer base, which frequently reflects good sales, marketing, and product development initiatives.

Alternatively, a negative YOY growth rate may suggest market issues, for example, increasing competition, or the need to rethink business growth plans. Analyzing these trends enables businesses to pivot or strengthen their strategies to capitalize on market opportunities and mitigate potential dangers.

Earnings Before Interest, Taxes, Depreciation, and Amortization

Earnings Before Interest, Taxes, Depreciation, and Amortization (EBITDA) measures a company's operational profitability. YOY analysis of EBITDA can provide a clear picture of a company's financial health and operational efficiency.

An increase in year-on-year EBITDA demonstrates that a company is strengthening its core operations, resulting in increased profitability independent of non-operational factors such as tax regimes or interest rates. This improvement could be from expense management, revenue growth, or a mix of the two.

In contrast, a decreased YOY EBITDA may indicate operational issues or inefficiencies that need to be addressed. By analyzing EBITDA trends, stakeholders may better assess a company's potential to profit from its major business activities, which can help with investment and operational decisions.

How To Calculate Year-Over-Year Growth?

To calculate YOY growth, start with your current year or period's revenue and subtract the previous year's. This tells you the overall YOY change in revenue. Then, divide that amount by last year's total revenue. To get a percentage, multiply that sum by 100.

The YOY growth calculation formula is: YoY growth (%) = [(Current year value / Previous year value) minus 1] x 100

Year-Over-Year Growth Calculator

A YOY growth calculator can help you calculate the annual growth rate of key financial parameters like revenue, profit, and cost. By automating the computation with a YOY calculator, you avoid potential errors and save time, allowing you to swiftly monitor performance patterns, make educated decisions, and successfully strategize for future growth or changes.

To skip the manual steps, use our year-over-year and percentage change calculator further down this page. Choose what you are tracking and it treats revenue and costs the right way round.

Year-over-year and percentage change calculator

Choose what you are tracking, such as revenue, MRR, ad spend, supplier payments or FX fees, then enter two values. The calculator shows your year-over-year (YoY) growth rate, the change in absolute terms and the growth multiple. It also knows which way each metric should move, so a fall in customer acquisition cost shows as good news and a fall in revenue does not. Add up to ten periods to see YoY growth for each one, and switch between a plain number, SGD $ and USD $.

How to use the YoY calculator

Pick the metric under "What are you tracking?", or keep "Any metric" for anything else. The calculator then sets which direction counts as better and the currency. You can change both. Click "Try an example" to see a realistic case before you enter your own numbers.

Which metrics to track by business type

The right numbers depend on how your business makes and spends money. These are common starting points.

How to read your result

A positive result means the metric grew compared with the earlier period, and a negative result means it fell. A result of 0% means nothing changed. Growth above 100% means the value more than doubled. For example, moving from SGD $1,000 to SGD $2,500 is a 150% increase.

Green and red show whether the change worked in your favour, and not only whether the number went up or down. For revenue, orders or MRR, a higher value is better, so growth shows in green. For customer acquisition cost, operating expenses or FX fees, a lower value is better, so a fall shows in green and a rise shows in red. Ad spend and supplier payments are costs, so they are set to a lower value being better. If a rise in either comes with higher sales, that can still be healthy, so compare them with your revenue and margins before you judge them. You can switch the setting at any time.

The growth multiple shows the same thing as a ratio. A multiple of 1.2x means the current value is 1.2 times the previous one, which is 20% growth.

Percentage change is not the same as percentage points. If a profit margin goes from 20% to 25%, it has risen by 5 percentage points. Measured as a percentage change, the margin grew by 25%, because (25 / 20) minus 1 = 0.25. Say which one you mean when you report the number.

YoY calculator examples

Ecommerce revenue against ad spend. An online store earned SGD $480,000 last year and SGD $552,000 this year. The change is SGD $72,000, and 72,000 / 480,000 = 0.15, so revenue grew 15%. Over the same period, ad spend rose from SGD $60,000 to SGD $78,000, which is 18,000 / 60,000 = 0.3, or 30%. Spend grew twice as fast as revenue, so the calculator flags it as unfavourable. It is worth checking whether the extra budget is paying for itself.

Startup MRR and acquisition cost. A SaaS startup grew MRR from SGD $40,000 to SGD $52,000, which is 12,000 / 40,000 = 0.3, or 30%. In the same year, customer acquisition cost fell from SGD $150 to SGD $120. The change is -SGD $30, and -30 / 150 = -0.2, so YoY growth is -20%. With "What counts as better?" set to "Lower value", the calculator shows this as a favourable change.

A trader's cross-border costs. An importer's supplier payments rose from SGD $320,000 to SGD $368,000, which is 48,000 / 320,000 = 0.15, or 15%. Over the same period, FX and cross-border fees fell from SGD $18,000 to SGD $14,400, a change of -SGD $3,600 and -3,600 / 18,000 = -0.2, or -20%. Paying more to suppliers while paying less in fees can be a healthy combination if sales are growing too, so read the supplier figure alongside your revenue.

US revenue in USD. A company expanding into the US earned USD $50,000 in its first year there and USD $65,000 in its second. The change is USD $15,000, and 15,000 / 50,000 = 0.3, so YoY growth is 30%. Choose "USD $" so the figures show in the right currency.

Several years. Revenue was SGD $800,000, SGD $920,000, SGD $1,058,000 and SGD $1,005,100 over four years. YoY growth is +15%, +15% and -5%. The average YoY growth is 8.33% and the CAGR is 7.9%. The two differ because CAGR accounts for compounding, while the average does not.

Common mistakes when calculating YoY growth

Comparing unlike periods. Compare a full year with a full year, or a quarter with the same quarter a year earlier. A part-year against a full year will understate growth.

Starting from zero or a negative number. Growth cannot be calculated from a zero starting value. If the starting value is negative, the percentage is measured against its absolute value and can be misleading, so read it with care.

Treating every increase as good news. Rising revenue is good, but rising operating expenses or customer acquisition cost usually are not. Decide which direction is better for each metric before you judge the result.

Mixing currencies and exchange rates. If you earn or pay in more than one currency, convert each period into one reporting currency before you compare. Otherwise exchange rate movements show up as growth or decline. Holding balances in several currencies in a multi-currency business account makes it easier to see each figure in its own currency first.

Mixing up percentage and percentage points. Report which one you are using, especially for margins and rates.

Ignoring seasonality and one-off items. A strong quarter driven by a single large contract or a seasonal peak says little about the underlying trend. Compare like with like and note any one-offs.

Using different accounting bases. Both values should follow the same accounting method and the same fiscal year. Otherwise the gap you measure may come from the method and not from performance.

Examples of Year-Over-Year

To better understand the YOY meaning, let’s look at a practical example. Suppose a company's revenue in 2019 was SGD $1 million, and in 2020, it increased to SGD $1.2 million.

The YOY growth would be calculated as: (SGD $1.2 million / SGD $1 million) minus 1 = 0.2, or 20% YoY growth.

This means the company's revenue grew by 20% YOY.

What is a Good Year-Over-Year Growth Rate?

There isn't a one-size-fits-all answer to this question, as it largely depends on the industry and a company's specific circumstances. However, in general, a year-over-year growth rate that outpaces inflation while exceeding the industry's average is regarded as good. Startups and high-growth industries, like technology or renewable energy, may see YoY growth rates of 20% or more.

In contrast, a single-digit YOY growth rate may still be acceptable for more established industries like utilities or consumer goods. To appropriately evaluate a company's success, compare its growth rate to its peers and consider the economic environment. Ultimately, constant growth is a strong indicator of a healthy and thriving firm.

A good rate depends on the metric. Revenue should rise, while costs such as customer acquisition cost should fall. Enter your own figures in the YoY calculator to see where you stand.

Limitations of Year-over-Year

Year-over-year analysis is commonly used to evaluate business performance. However, it has limitations, particularly in its ability to provide a comprehensive picture of a company's health. Focusing on annual comparisons generates fewer data points, which may obscure short-term trends and fluctuations that are important for decision-making. This may cause businesses to ignore emerging patterns that could inform strategic adjustments, resulting in missed opportunities for growth or risk mitigation.

Another limitation of YOY analysis is that it does not account for seasonality, which is critical for businesses with seasonal demand such as ski lodges or beachfront hotels. These businesses' revenue varies significantly across seasons, which YoY analysis may not accurately reflect. As a result, strategic cost-cutting or revenue-optimization opportunities during off-peak seasons may be missed, negatively impacting the company's overall financial performance and operational efficiency.

Alternatives to Year-Over-Year

While YOY is a valuable analytical tool, other methods can provide additional insights into a company's performance.

The same formula applies to quarters and months. Enter the two periods you want to compare in the YoY calculator.

Quarter Over Quarter

Quarter Over Quarter (QOQ) compares a company's performance in one quarter with its performance in the previous quarter. QOQ analysis provides a more detailed view and comparison of a company's short-term performance and can highlight seasonal trends or abrupt changes in business operations that YOY comparisons may miss.

While YOY provides a more comprehensive view of long-term growth or decline by smoothing out seasonal variations, QOQ is especially useful for tracking the immediate effects of strategic decisions or market changes. However, it is essential to note that QOQ results can be more volatile, requiring careful interpretation to distinguish between temporary fluctuations and long-term trends.

Month-Over-Month

Month-over-month (MOM) comparisons can provide even more granular data, making it possible to detect subtle shifts in a company's performance. Month-over-month (MOM) analysis identifies very short-term trends and the immediate impact of specific actions or events on a company's performance. This level of granularity is especially useful for businesses in fast-changing industries or those making rapid strategic changes.

In contrast to YOY analysis, MOM can highlight short-term fluctuations that may not impact the long-term trend. However, MOM data is subject to seasonal variations and should be interpreted cautiously to avoid overestimating the significance of temporary changes.

Compound Annual Growth Rate

The Compound Annual Growth Rate (CAGR) measures a company's average growth rate over a given period. Unlike YOY, CAGR accounts for the compounding effect, aggregating prior profits or losses in its computation. This contrasts with YOY analysis, which compares one year to the previous year's value or next without taking into account cumulative growth. As a result, CAGR provides a more nuanced and comprehensive picture of long-term growth, making it an effective tool for measuring and comparing long-term performance patterns.

Year-To-Date

Year-to-date (YTD) measures a company's financial performance from the beginning of the current calendar or fiscal year until the present day. It provides a picture of the company's financial health and operational success over this time period. In contrast, YOY analysis examines a company's performance at the same moment in different years, providing insight into its growth or decline throughout annual cycles. While YTD is essential for analyzing short-term success in a particular year, YOY delivers a more comprehensive view of long-term trends and year-specific changes.

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