What Are Financial Ratios?
The most important financial ratios for UK businesses, how to calculate them from the financial statements and what each ratio tells you.
Financial ratios are calculations that use figures from the financial statements to measure and compare aspects of a company’s performance, financial health and efficiency. They distil complex accounting data into simple, comparable metrics that directors, investors, lenders and analysts use to make informed decisions.
Section 1: Why Financial Ratios Matter
1.1 Quick Assessment
A single number such as “profit of £200,000” means little without context. Is that good or bad? Financial ratios provide context by expressing performance relative to revenue, assets, equity or other benchmarks.
1.2 Comparison
Ratios enable comparison across:
- Time: How has the business performed compared to last year?
- Industry: How does the business compare to competitors?
- Targets: Is the business meeting its strategic goals?
1.3 Early Warning
Deteriorating ratios can signal problems before they become crises, giving directors time to take corrective action. Lenders often include financial covenants in loan agreements, requiring the business to maintain certain ratios.
Section 2: Sources of Data
Financial ratios are calculated from three primary sources:
- The income statement (revenue, costs, profit)
- The balance sheet (assets, liabilities, equity)
- The cash flow statement (cash generation and usage)
The trial balance provides the underlying data for all three statements.
Section 3: Profitability Ratios
Profitability ratios measure how effectively a business generates profit from its revenue and resources.
3.1 Gross Profit Margin
Gross profit margin = (Revenue - Cost of goods sold ) / Revenue x 100
| Example | £ |
|---|---|
| Revenue | 1,000,000 |
| Cost of goods sold | 600,000 |
| Gross profit | 400,000 |
| Gross profit margin | 40% |
This ratio shows how much of each pound of revenue is left after covering the direct costs of producing goods or services. A declining gross margin may indicate rising input costs, pricing pressure or changes in product mix.
3.2 Operating Profit Margin
Operating profit margin = Operating profit / Revenue x 100
This ratio measures profitability after all operating expenses (including salaries, rent, depreciation and amortisation ) but before interest and tax. It shows how efficiently the business manages its day-to-day costs.
3.3 Net Profit Margin
Net profit margin = Profit after tax / Revenue x 100
The bottom-line profitability ratio, reflecting the final profit available to shareholders after all costs, interest and corporation tax (25% for profits above £250,000, 19% for profits up to £50,000, with marginal relief in between).
3.4 Return on Capital Employed (ROCE)
ROCE = Operating profit / (Total assets - Current liabilities) x 100
ROCE measures how effectively a business uses its long-term capital to generate profit. It is one of the most widely used performance measures in UK business because it accounts for both equity and long-term debt financing.
3.5 Return on Equity (ROE)
ROE = Profit after tax / Shareholders’ equity x 100
This ratio shows the return generated for equity shareholders. A consistently high ROE suggests the business is using shareholders’ funds effectively.
Section 4: Liquidity Ratios
Liquidity ratios assess a company’s ability to meet its short-term obligations from its current assets.
4.1 Current Ratio
Current ratio = Current assets / Current liabilities
| Example | £ |
|---|---|
| Current assets | 350,000 |
| Current liabilities | 200,000 |
| Current ratio | 1.75 |
A ratio above 1.0 means the business has more current assets than current liabilities. A ratio of 1.5 to 2.0 is generally considered healthy, though the ideal level varies by industry.
4.2 Quick Ratio (Acid Test)
Quick ratio = (Current assets - Inventory) / Current liabilities
This is a more conservative measure that excludes inventory, which may not be quickly convertible to cash. A quick ratio below 1.0 may indicate potential cash flow difficulties.
4.3 Cash Ratio
Cash ratio = Cash and cash equivalents / Current liabilities
The most stringent liquidity measure, showing whether the business could pay all current liabilities from cash alone. While useful, a very high cash ratio may suggest the business is not deploying its cash effectively.
For more detail on the relationship between current assets and current liabilities, see our article on working capital .
Section 5: Efficiency Ratios
Efficiency ratios (also called activity ratios) measure how well a business uses its assets and manages its liabilities.
5.1 Inventory Turnover
Inventory turnover = Cost of goods sold / Average inventory
A higher ratio indicates that inventory is sold quickly. A declining ratio may suggest overstocking or slow-moving goods.
5.2 Inventory Days
Inventory days = (Average inventory / Cost of goods sold) x 365
This expresses the same concept in days, showing how long on average inventory is held before being sold.
5.3 Receivables Days (Debtor Days)
Receivables days = (Trade receivables / Revenue) x 365
This measures the average number of days customers take to pay. If the business offers 30-day payment terms but receivables days are 55, collection needs improvement.
5.4 Payables Days (Creditor Days)
Payables days = (Trade payables / Cost of goods sold) x 365
This measures how long the business takes to pay its suppliers. Stretching payables too far can damage supplier relationships, while paying too quickly may put pressure on cash flow.
5.5 Asset Turnover
Asset turnover = Revenue / Total assets
This ratio shows how efficiently the business generates revenue from its asset base. A higher figure indicates more productive use of assets.
Section 6: Solvency Ratios
Solvency ratios assess the company’s long-term financial stability and ability to meet its obligations over time.
6.1 Debt-to-Equity Ratio
Debt-to-equity = Total debt / Shareholders’ equity
A higher ratio means the business is more reliant on debt financing, which increases financial risk but can enhance returns in good times. Lenders monitor this ratio closely.
6.2 Gearing Ratio
Gearing = Long-term debt / (Long-term debt + Shareholders’ equity) x 100
Similar to debt-to-equity, this shows the proportion of long-term finance provided by debt. UK banks typically expect gearing below 50% for lending purposes.
6.3 Interest Cover
Interest cover = Operating profit / Interest expense
This measures how many times the business can cover its interest payments from operating profit. A ratio below 2.0 is a warning sign, and below 1.0 means the business cannot cover its interest from operations.
6.4 Equity Ratio
Equity ratio = Shareholders’ equity / Total assets x 100
This shows the proportion of total assets financed by equity rather than debt. A higher ratio indicates greater financial stability.
Section 7: Cash Flow Ratios
These ratios use data from the cash flow statement to assess cash generation.
7.1 Cash Flow to Revenue
Cash flow to revenue = Net cash from operations / Revenue x 100
This shows what proportion of revenue converts into actual operating cash flow.
7.2 Cash Conversion Ratio
Cash conversion = Net cash from operations / Operating profit x 100
A ratio close to or above 100% indicates that reported profits are being converted into real cash. A consistently low ratio may indicate problems with receivables collection or inventory management.
7.3 Free Cash Flow Yield
Free cash flow yield = Free cash flow / Market capitalisation x 100
Used primarily for listed companies, this shows the cash return generated relative to the company’s market value.
Section 8: Using Financial Ratios Effectively
8.1 Context Matters
No single ratio tells the full story. A company with a low current ratio might be perfectly healthy if it has strong, predictable cash flows. A company with a high profit margin might be at risk if its debt levels are unsustainable.
8.2 Trend Analysis
Tracking ratios over three to five years reveals trends that a single snapshot cannot. A gradually declining gross margin or steadily increasing receivables days signals issues that need attention.
8.3 Industry Benchmarks
Different industries have different norms. A supermarket chain will have low gross margins but high inventory turnover, while a software company will have high margins but different efficiency metrics. Comparing ratios to industry averages provides meaningful context.
8.4 Limitations
Financial ratios have important limitations:
- They rely on historical data from the financial statements
- Different accounting policies (e.g., depreciation methods) can distort comparisons
- They may be affected by one-off or exceptional items
- They do not capture non-financial factors such as employee morale, brand strength or market position
8.5 Banking Covenants
UK lenders commonly include financial ratio covenants in loan agreements:
| Common covenant | Typical threshold |
|---|---|
| Interest cover | Minimum 3x |
| Gearing | Maximum 50% |
| Current ratio | Minimum 1.2 |
| Debt-to-EBITDA | Maximum 3x |
Breaching a covenant can give the lender the right to demand repayment, making ratio monitoring essential for any business with borrowings. This links closely to the going concern assessment that directors must perform at each reporting date.
Understanding financial ratios is fundamental to interpreting UK financial statements and forms a core skill for anyone involved in accounting , finance or business management.