Financial Management and Business Data Analytics · Comparative, Common-Size Financial Statements and Trend Analysis

Common-Size Financial Statements: Method and Solved Examples

Updated 10 October 2026 · Fact-checked

A common-size statement expresses every item as a percentage of one base: total assets (or total equity and liabilities) for a balance sheet, and net sales (revenue from operations) for an income statement. You divide each item by the base, multiply by 100, and compare the percentages across years or firms.

Understand Common-Size Financial Statements

Rupee figures alone do not tell you much when companies differ in size. A firm with ₹50 crore of debt may be safe, and another with ₹5 crore may be in trouble. Common-size statements fix this by converting each item into a percentage of a single base figure.

This is called vertical analysis, because you read down one statement for one period. The base becomes 100%. In a balance sheet, the base is total assets (which equals total equity and liabilities). In an income statement, the base is net sales, shown as revenue from operations. Every other line is its share of that base.

The real value comes from comparison. Put two years side by side and you see whether, for example, material cost has crept from 55% to 60% of sales. Put two companies side by side and you can compare their cost structure or capital structure even if one is ten times larger.

A comparative statement is different. It places figures of two or more years side by side and shows absolute change and percentage change (horizontal analysis). A common-size statement shows composition within one year. Many questions ask you to do both, so keep the two layouts distinct.

You also need to interpret. A rising share of borrowings, a falling share of profit, or a growing share of inventory each signals something. ICMAI-style answers expect one or two lines of comment after the table.

Key rules to remember

Common-size percentage (balance sheet): Item % = (Item amount ÷ Total assets) × 100; Use total of equity and liabilities if that is the stated base; it equals total assets.
Common-size percentage (income statement): Item % = (Item amount ÷ Net sales) × 100; Net sales means revenue from operations after returns and discounts, unless the question gives another base.
Check total: Sum of component percentages = 100% of the relevant total; Assets add to 100%; equity and liabilities add to 100%. Use this to catch errors.
Change in composition: Change in share = Item % (current year) − Item % (base year); Expressed in percentage points, not as a percentage change.

How to solve Common-Size Financial Statements questions

Use this method for any common-size question, whether it asks for a balance sheet, an income statement, or both for two years.

1Read the question and note the base asked for. If none is stated, use total assets for a balance sheet and net sales for an income statement.
2Arrange the statement in a clean vertical format with columns for amount and percentage for each year.
3Compute the base total first (total assets, or net sales) and confirm it ties with the other side or the given figure.
4Divide each item by the base and multiply by 100. Work to one or two decimal places as the question suggests.
5Add up the percentages for each group and check they total 100% for the base and for each side.
6Compare the years or firms line by line and note the largest shifts in percentage points.
7Write two or three lines of interpretation: what changed, a likely reason, and what it means for profitability or financial position.

Quickest way: Reciprocal multiplier method

When to use it: Use it when a statement has many items and you have a calculator but limited time.

Compute 100 ÷ base once and store it in the calculator memory.
Multiply each item by that stored factor to get its percentage directly.
Do the subtotals (current assets, equity, gross profit) and confirm they equal the sum of their parts.
Check that the total is 100% within rounding, and adjust the largest item if rounding leaves a 0.1% gap.

Common mistakes in Common-Size Financial Statements

Using the wrong base, such as total sales including taxes or gross sales, or using total current assets for items of the whole balance sheet.
Students copy the base used in the last problem without re-reading the question.
Fix: Write the base at the top of your answer before you start calculating.
Confusing common-size with comparative statements and showing only absolute changes.
Both use percentages and multiple years, so the two look alike.
Fix: Remember: common-size is each item as a percentage of a base within one year; comparative is change between years.
Percentages that do not add up to 100%.
An arithmetic slip, a missed line item, or wrong rounding.
Fix: Add each group's percentages and check against the total before moving on.
Describing a change in percentage points as a percentage change.
Students say a share rising from 40% to 50% grew by 50% instead of 10 percentage points.
Fix: Subtract the two percentages and say 'percentage points' when comparing common-size figures.
Skipping the interpretation.
Students treat the table as the whole answer.
Fix: Always add short comments on the key shifts, such as higher borrowings or lower margins.

Worked examples

Example 1

The income statement of Kaveri Textiles Ltd. for the year shows: Revenue from operations ₹8,00,000; Cost of materials consumed ₹4,40,000; Employee benefit expense ₹1,20,000; Other expenses ₹80,000; Depreciation ₹40,000; Tax ₹30,000. Prepare a common-size income statement.

Show the solution

Base = net sales = ₹8,00,000, so the factor is 100 ÷ 8,00,000.
Cost of materials: 4,40,000 ÷ 8,00,000 × 100 = 55%.
Employee benefit expense: 1,20,000 ÷ 8,00,000 × 100 = 15%.
Other expenses: 80,000 ÷ 8,00,000 × 100 = 10%.
Depreciation: 40,000 ÷ 8,00,000 × 100 = 5%.
Total expenses before tax = 4,40,000 + 1,20,000 + 80,000 + 40,000 = ₹6,80,000, which is 85%.
Profit before tax = 8,00,000 − 6,80,000 = ₹1,20,000, which is 15%.
Tax: 30,000 ÷ 8,00,000 × 100 = 3.75%.
Profit after tax = 1,20,000 − 30,000 = ₹90,000, which is 11.25%.

Answer: Revenue 100%; materials 55%; employee cost 15%; other expenses 10%; depreciation 5%; profit before tax 15%; tax 3.75%; profit after tax 11.25%. Materials absorb more than half of every rupee of sales, so cost control on materials is the main lever for margin.

Example 2

Balance sheet of Narmada Traders Ltd. at the end of Year 1 and Year 2 (₹ lakh): Year 1 – Equity share capital 40, Reserves 20, Long-term borrowings 20, Current liabilities 20; Year 2 – Equity share capital 40, Reserves 35, Long-term borrowings 25, Current liabilities 40. Prepare a common-size statement of equity and liabilities and comment.

Show the solution

Year 1 total = 40 + 20 + 20 + 20 = ₹100 lakh. Year 2 total = 40 + 35 + 25 + 40 = ₹140 lakh.
Year 1 percentages: share capital 40%, reserves 20%, borrowings 20%, current liabilities 20%; total 100%.
Year 2: share capital 40 ÷ 140 × 100 = 28.57%.
Year 2: reserves 35 ÷ 140 × 100 = 25%.
Year 2: borrowings 25 ÷ 140 × 100 = 17.86%.
Year 2: current liabilities 40 ÷ 140 × 100 = 28.57%.
Check: 28.57 + 25 + 17.86 + 28.57 = 100.00%.
Changes in points: share capital −11.43; reserves +5; borrowings −2.14; current liabilities +8.57.

Answer: Year 1: 40%, 20%, 20%, 20%. Year 2: 28.57%, 25%, 17.86%, 28.57%. Growth was funded mainly by current liabilities (up 8.57 percentage points) and retained profits (up 5 points), while the share of long-term borrowings fell. The higher short-term obligations may pressure liquidity, so the firm should watch its working capital position.

Exam tips

Write the base and the formula at the top of your answer. Step marks are given for method even if one figure slips.
Use a table with amount and percentage columns for each year. Neat layout earns presentation marks.
Always close with two or three lines of interpretation tied to your largest changes in percentage points.
In MCQs, check which base is stated. Many options differ only because they use total assets versus sales.
If asked to compare two companies, put them in adjacent columns and comment on structure, not on rupee size.

Practice questions from Comparative, Common-Size Financial Statements and Trend Analysis

Common-Size Financial Statements in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Common-Size Financial Statements: frequently asked questions

What is the difference between comparative and common-size statements?

A comparative statement places figures of different years side by side and shows absolute and percentage changes. A common-size statement expresses each item as a percentage of a base, such as total assets or net sales, within the same period. The first tracks change over time; the second shows composition.

What is the base for a common-size balance sheet?

The usual base is total assets, which equals total equity and liabilities. Each asset and each liability or equity item is shown as a percentage of that total. If a question names another base, follow the question.

What is the base for a common-size income statement?

The base is net sales, shown as revenue from operations. Every expense and profit line is then expressed as a percentage of it, so net sales is 100%.

Why is common-size analysis called vertical analysis?

Because you read down a single statement and compare each item to one base figure in the same period. Horizontal analysis, by contrast, compares the same item across periods.