A common size financial statement is a powerful financial analysis tool that presents financial information in a standardized format, making it easier to compare and analyze the performance of companies across different sizes and industries. By expressing each line item as a percentage of a common base, such as total revenue or total assets, common size financial statements allow investors, analysts, and stakeholders to gain insights into the relative proportions of various components of a company's financials. This standardized approach enhances the comparability of financial statements and facilitates trend analysis, industry benchmarking, and performance evaluation.

Construction of Common Size Financial Statements

To create a common size financial statement, each line item in the traditional financial statement is converted into a percentage of a chosen base figure. The two most common bases are total revenue (income statement) and total assets (balance sheet). The steps involved in constructing a common size financial statement are as follows:

1. Select Base Figure: Choose a base figure that will serve as the denominator for calculating the percentages. For the income statement, total revenue is usually used as the base. For the balance sheet, total assets are commonly chosen.
2. Calculate Percentages: For each line item, divide the value of the line item by the chosen base figure and multiply by 100 to express it as a percentage.
3. Presentation: Present the calculated percentages in a column format alongside the traditional financial statement. The common size financial statement allows for easy comparison of the relative sizes of various line items across different time periods or companies.

Benefits of Common Size Financial Statements

1. Comparison: Common size financial statements enable easy comparison between companies of different sizes and industries. This is particularly valuable for benchmarking and industry analysis.
2. Trend Analysis: By presenting financial information in a standardized format, it becomes simpler to identify trends and changes in a company's financial performance over time.
3. Identify Patterns: Common size financial statements help highlight patterns and anomalies in the proportions of various line items. For example, an increase in the percentage of cost of goods sold (COGS) relative to total revenue might indicate a change in the company's cost structure.
4. Visibility: Common size financial statements make it easier to identify areas where a company might be allocating a disproportionate amount of its resources.
5. Investor Understanding: Investors and stakeholders can better understand the composition of a company's financials and assess the impact of various components on the overall financial picture.

Common Size Income Statement

In a common size income statement, each line item is expressed as a percentage of total revenue. This format allows for a clear understanding of the proportion of revenue that is allocated to various expenses and profits. Some of the key line items commonly included in a common size income statement include:

• Revenue
• Cost of Goods Sold (COGS)
• Gross Profit
• Operating Expenses (including Selling, General, and Administrative Expenses)
• Operating Income (EBIT)
• Interest Expense
• Tax Expense
• Net Income

Common Size Balance Sheet

In a common size balance sheet, each line item is expressed as a percentage of total assets. This format provides insights into the composition of a company's assets and liabilities relative to its total asset base. Key line items that are often included in a common size balance sheet are:

• Cash and Equivalents
• Accounts Receivable
• Inventory
• Property, Plant, and Equipment
• Total Liabilities
• Total Equity

Limitations of Common Size Financial Statements

1. Loss of Absolute Value: While common size financial statements facilitate relative comparisons, they may mask the absolute values of line items. This can sometimes make it difficult to understand the actual size of the financial figures.
2. Industry Differences: Different industries have varying cost structures and business models. Comparing common size financial statements across industries may not always provide accurate insights due to these variations.
3. Limited Context: Common size financial statements may not capture the full context of a company's operations, industry dynamics, and strategic choices.
4. Focus on Percentages: The focus on percentages might lead to less attention being paid to the actual dollar values, which can be important for making decisions.

The Bottom Line

A common size financial statement is a valuable tool for financial analysis that standardizes financial information for comparison across different companies and time periods. By expressing line items as percentages of a chosen base figure, such as total revenue or total assets, this format enhances the ability to identify trends, perform benchmarking, and gain insights into the relative proportions of various components of a company's financials. While common size financial statements have their limitations, they provide a useful perspective for investors, analysts, and stakeholders seeking to make informed financial decisions.