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Financial ratio analysis compares related figures from a company’s financial statements to assess liquidity, profitability, debt and operating efficiency. To calculate a ratio, choose a consistent definition, identify the relevant statement figures and divide them as specified; then interpret the result against the company’s own history and comparable businesses. No ratio, by itself, proves that a company is financially healthy or unhealthy.
What is financial ratio analysis?
Financial ratio analysis is a way to relate figures in financial statements so readers can assess different aspects of a company’s finances. Common categories include liquidity (near-term obligations), solvency or financing (longer-term debt and interest costs), profitability (profit relative to sales or capital) and efficiency (how well assets and working capital support operations). Category labels vary among educational sources, so the definitions used in any analysis matter.
A ratio is a diagnostic clue, not a verdict. An increase can have more than one explanation, and a figure that looks strong in isolation may reflect a weakness or a business choice. Compare a company with its own prior periods and relevant peers, using the same definitions and accounting basis.
Which statements and figures do you need?
Start with the income statement, balance sheet and cash flow statement, then read the accompanying notes and management discussion. A balance sheet reports amounts at a particular date; income statement figures such as revenue, expenses and profit cover a period. When comparing a period flow with a balance-sheet figure, an average of beginning and ending balances can be more representative than a single-date balance.
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For U.S. public companies, the SEC’s Beginners’ Guide to Financial Statements explains how statements connect and gives ratio examples. Its How to Read a 10-K guide describes the filing’s financial statements, notes and management’s discussion and analysis (MD&A). MD&A can provide management’s account of trends, risks, uncertainties and liquidity; notes can explain accounting policies and judgments. Filing formats and disclosure rules differ by jurisdiction.
Before calculating, record the reporting period, units, accounting basis and exact line items. Check whether a figure is a period total or a date-specific balance, and whether a company’s chosen presentation affects comparability. If a company reports non-GAAP measures, consider how those measures differ from the financial statement figures.
How do you calculate financial ratios?
For each measure, settle on a definition before comparing companies. The examples below use illustrative figures to show the arithmetic; they are not benchmarks or real-company data. Dollar amounts are in the same units within each example.
Can the company meet near-term obligations?
Working capital
Formula: current assets − current liabilities. Working capital is an amount, not a ratio; it indicates the short-term resource cushion after current liabilities are subtracted.
Illustration: Current assets of $200,000 − current liabilities of $100,000 = $100,000 working capital. Positive working capital may indicate resources available beyond current liabilities, while a small or negative amount can signal pressure. The result needs context: the timing and quality of current assets and liabilities matter.
Current ratio
Formula: current assets ÷ current liabilities.
Illustration: $200,000 ÷ $100,000 = 2.0, or 2:1. This says current assets equal twice current liabilities under the figures and definition used. It is not a universal target. A higher figure might indicate a cushion, or it might point to resources that are not being used effectively.
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Quick ratio (acid-test)
Formula used here: (current assets − inventory − prepaid expenses) ÷ current liabilities. Some sources define quick assets differently; state and apply the same convention when comparing results.
Illustration: If current assets are $200,000, inventory is $60,000, prepaid expenses are $10,000 and current liabilities are $100,000, then ($200,000 − $60,000 − $10,000) ÷ $100,000 = 1.3. Excluding inventory and prepayments focuses attention on assets that may be more readily available for immediate obligations. Whether those assets can actually be converted to cash in time still depends on the business.
How does the company finance operations and cover debt costs?
Debt-to-equity
Formula used here: total liabilities ÷ shareholders’ equity. This follows the SEC and OpenStax examples, which use total liabilities in the numerator. Other analyses may use interest-bearing debt instead, so verify the definition rather than assuming that every “debt-to-equity” figure measures the same thing.
Illustration: Total liabilities of $300,000 ÷ shareholders’ equity of $200,000 = 1.5. Under this definition, liabilities are 1.5 times equity. The ratio describes one aspect of financing; its significance depends on the company’s business model, obligations, and comparison set.
Times interest earned (interest cover)
Formula: earnings before interest and taxes (EBIT) ÷ interest expense. If a company’s reported operating profit is the appropriate equivalent, use it consistently and identify the measure.
Illustration: EBIT of $120,000 ÷ interest expense of $30,000 = 4 times. This indicates earnings were four times interest expense for the period, using those figures. It does not establish that the company can repay debt principal, which is a separate obligation.
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Operating margin
Formula: income from operations ÷ net revenue × 100.
Illustration: Operating income of $80,000 ÷ net revenue of $500,000 × 100 = 16%. This means the company generated 16 cents of operating income per dollar of net revenue in the period, under the stated figures. Compare margins with similar businesses and across periods; costs, product mix and other operating conditions can affect the result.
Return on assets (ROA)
Formula used here: net income ÷ average total assets × 100, where average total assets = (beginning total assets + ending total assets) ÷ 2.
Illustration: Net income of $40,000 ÷ average assets of $400,000 × 100 = 10%. ROA relates the selected profit measure to the assets used during the period. Other conventions use different profit measures, so comparisons are meaningful only when the numerator and denominator conventions match.
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Return on equity (ROE)
Formula used here: (net income − preferred dividends) ÷ average shareholders’ equity × 100, where average equity = (beginning equity + ending equity) ÷ 2. If there are no preferred dividends, the numerator is net income.
Illustration: Net income of $50,000, no preferred dividends and average equity of $250,000 gives ($50,000 − $0) ÷ $250,000 × 100 = 20%. ROE relates the return attributable to common shareholders to their average equity under this convention. Financing affects equity, so examine debt and interest measures alongside it rather than treating a high ROE as proof of strong operations.
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Return on capital employed (ROCE)
One common ACCA convention is ROCE = profit before interest and tax ÷ capital employed × 100. Capital employed must be defined consistently in the analysis. ROCE uses a pre-interest profit measure and a capital base that includes funding beyond equity, unlike the ROE example above. Comparing margins, asset use and financing together can help explain why returns differ; do not mix unmatched profit measures and capital bases.
How efficiently does the company use assets and working capital?
Inventory turnover
Formula: cost of sales ÷ average inventory, where average inventory = (beginning inventory + ending inventory) ÷ 2.
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Receivables collection period
Formula: receivables ÷ credit sales × 365 days.
Illustration: Receivables of $50,000 ÷ credit sales of $500,000 × 365 = 36.5 days. This estimates the average time receivables represent, using the selected figures. Faster collection may support cash flow, but overly strict credit terms can affect sales.
Inventory holding period
Formula: inventory ÷ cost of sales × 365 days.
Illustration: Inventory of $100,000 ÷ cost of sales of $600,000 × 365 ≈ 60.8 days. This estimates how many days of cost of sales are represented by inventory. Interpret it in light of the products, demand patterns and risk of stock becoming obsolete.
Payables payment period
Formula: payables ÷ credit purchases × 365 days. If credit purchases are unavailable, cost of sales can be used as an approximation, but it is not the same input.
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Illustration: Payables of $40,000 ÷ credit purchases of $400,000 × 365 = 36.5 days. The estimate indicates the time represented by payables relative to purchases. Extending payment time may preserve cash in the short term, but can strain supplier relationships.
Asset turnover
Formula used here: revenue ÷ total assets. This follows the ACRA definition; ACCA also presents an asset-efficiency measure using revenue ÷ capital employed, which has a different denominator.
Illustration: Revenue of $500,000 ÷ total assets of $400,000 = 1.25 times. Under this definition, the company generated $1.25 of revenue per dollar of total assets for the period. State whether the asset amount is an average or a date-specific balance, and use the same convention across comparisons.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What do financial ratios tell you when you compare them?
A ratio describes a relationship under a particular definition and set of accounting figures. Its interpretation comes from context: the company’s trend, its business model, comparable peers, cash flows and management’s explanation. The SEC notes that desirable ratios vary by industry; there is no universal threshold that makes a ratio “good.”
- Compare like with like: Use the same formula, reporting period, accounting basis and denominator convention. For companies with different business models, a direct comparison may be misleading.
- Check the trend: Ask whether the measure improved or deteriorated versus comparable prior periods, and identify what changed in the underlying statement figures.
- Read cash flow with liquidity: A current or quick ratio does not show the timing of cash receipts and payments. Consider operating cash flow alongside liquidity ratios.
- Look for the cause: Use notes and MD&A to understand material changes, risks, accounting judgments and management’s explanation of results.
- Separate accounting measures: Check how non-GAAP figures differ from reported financial statement amounts before using them in a calculation.
For example, a rising current ratio could reflect a larger short-term cushion, but it could also result from inventory building up or other resources sitting idle. The ratio alone cannot distinguish those explanations.
Quick Recap
Sources and definitions
- U.S. Securities and Exchange Commission, Beginners’ Guide to Financial Statements — statement basics, example ratios and industry variation.
- U.S. Securities and Exchange Commission, How to Read a 10-K — filing sections, financial statements, MD&A, notes and accounting judgments.
- The Open University OpenLearn, Financial statement analysis and interpretation: Introduction — analysis categories and learning framework.
- OpenStax, Principles of Accounting, Volume 1: Financial Accounting, “A Financial Statement Analysis” — formula examples and interpretations.
- Accounting and Corporate Regulatory Authority (Singapore), Understanding Corporate Compliance and Financial Profile — formula examples and definitions.
- ACCA, Ratio analysis — formulas, interpretation, limitations and trade-offs.
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