Debt to Equity Ratio:
The debt to equity ratio measures the relationship between long-term debt of a firm and its total equity. Since both these figures are obtained from the balance sheet itself, this is a balance sheet ratio. Let us take a look at the formula:

The debt-equity ratio holds a lot of significance. Firstly it is a great way for the company to measure its leverage or indebtedness. A low ratio means the firm is more financially secure, but it also means that the equity is diluted.
In contrast, a high ratio indicates a risky business where there are more creditors of the firm than there are investors. In fact, a high debt to equity ratio may deter more investors from investing in the firm, and even deter creditors from lending money.
While there is no industry standard as such it is best to keep this ratio as low as possible. The maximum a company should maintain is the ratio of 2:1, i.e. twice the amount of debt to equity.
Debt Ratio
Next, we learn about debt ratio. This ratio measures the long-term debt of a firm in comparison to its total capital employed. Alternatively, instead of capital employed, we can use net fixed assets. So the debt ratio will measure the liabilities (long-term) of a firm as a percent of its long-term assets. The formula is as follows:

This is one of the more important solvency ratios. It indicates the financial leverage of the firm. A low ratio points to a more financially stable business, better for the creditors. A higher ratio points to doubts about the firms long-term financial stability. But a higher ratio helps the management with trading on equity, i.e. earn more income for the shareholders. Again there is no industry standard for this ratio.
Proprietary Ratio
The third of the solvency ratios is the proprietary ratio or equity ratio. It expresses the relationship between the proprietor’s funds, i.e. the funds of all the shareholders and the capital employed or the net assets. Like the debt ratio shows us the comparison between debt and capital, this ratio shows the comparison between owners funds and total capital or net assets. The ratio is as follows:

A high ratio is a good indication of the financial health of the firm. It means that a larger portion of the total capital comes from equity. Or that a larger portion of net assets is financed by equity rather than debt. One point to note, that when both ratios are calculated with the same denominator, the sum of debt ratio and the proprietary ratio will be 1.
Interest Coverage Ratio
All debt has a cost, which we normally term as an interest. Debentures, loans, deposits etc all have an interest cost. This ratio will measure the security of this interest payable on long-term debt. It is the ratio between the profits of a firm available and the interest payable on debt instruments. The formula is:

Interpretation of Solvency Ratios:
1. Debt Equity Ratio
The debt equity ratio measures the proportion of external debt to shareholder funds, indicating how much of the business is financed through borrowed capital relative to owners own investment. A lower ratio generally signals a conservative capital structure with lower financial risk, since the organization relies less on debt and interest obligations, while a higher ratio indicates greater reliance on borrowed funds and correspondingly higher financial risk during downturns. Lenders typically prefer this ratio to remain within acceptable limits before extending further credit.
2. Interest Coverage Ratio
The interest coverage ratio indicates how many times a company’s earnings before interest and tax can cover its interest obligations, reflecting the margin of safety available to lenders in case of a decline in profitability. A higher ratio suggests comfortable debt servicing capacity and lower risk of default, while a ratio close to one indicates the organization is barely able to meet interest payments from current earnings, raising solvency concerns. This ratio is particularly important for capital intensive or highly leveraged businesses.
3. Proprietary Ratio
The proprietary ratio expresses the proportion of total assets financed by shareholder funds, indicating the extent of owner contribution to the overall capital structure and the cushion available to creditors in case of liquidation. A higher proprietary ratio reflects stronger long term financial stability and lower dependence on external liabilities, making the organization more resilient during periods of financial stress or economic downturn. Conversely, a low ratio signals higher financial risk and vulnerability to creditor pressure.
4. Fixed Assets to Net Worth Ratio
This ratio measures the extent to which fixed assets are financed through owners funds, comparing the value of fixed assets to shareholder equity, and indicates whether the organization is over invested in fixed assets relative to its own capital base. A ratio below one is generally considered healthy, suggesting fixed assets are adequately covered by net worth with some owner funds remaining for working capital needs, while a ratio exceeding one indicates reliance on external liabilities to finance fixed assets.
5. Total Assets to Debt Ratio
The total assets to debt ratio measures the extent to which total assets are available to cover long term debt obligations, providing an indication of the security available to long term lenders in the event of financial difficulty. A higher ratio suggests that the organization holds sufficient assets relative to its borrowings, offering greater safety and confidence to creditors, whereas a lower ratio indicates a thinner asset cushion supporting existing debt levels. This ratio is often reviewed alongside debt equity ratio for a complete solvency picture.
6. Capital Gearing Ratio
The capital gearing ratio compares fixed cost bearing capital, such as debentures and preference shares, to equity shareholder funds, indicating the degree of financial leverage employed by the organization and the extent to which fixed returns must be paid regardless of profitability levels. A highly geared company with substantial fixed cost capital faces greater financial risk during periods of low earnings, since fixed interest and dividend obligations continue irrespective of business performance, whereas a low geared company enjoys more flexibility during downturns.
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