Debt Equity Ratio, Proprietary Ratio, and Interest Coverage Ratio

Debt equity ratio, proprietary ratio, and interest coverage ratio all belong to the same family of ratios: solvency ratios.

That means they do not ask whether the business can pay tomorrow’s small bills. They ask something bigger:

Can the business remain financially safe in the long run?

These three ratios are often studied together because they look at debt from three different angles.

Debt equity ratio checks the balance between borrowed funds and owners’ funds.

Proprietary ratio checks how much of the business assets are supported by owners’ funds.

Interest coverage ratio checks whether profits are strong enough to pay interest comfortably.

Once you remember this difference, the formulas stop feeling like separate memorisation points.

The Big Idea Behind These Ratios

A business can grow using its own funds, borrowed funds, or a mix of both.

Using borrowed funds is not automatically bad. Loans and debentures can help a company expand faster. But debt creates a fixed obligation. Interest has to be paid even when profit is low.

That is why solvency ratios are important. They help students and analysts judge whether a company is standing on a steady financial base.

Ratio	Main question	What it protects against
Debt equity ratio	How much long-term debt is used compared with shareholders’ funds?	Too much dependence on borrowed funds
Proprietary ratio	How much of the assets are financed by owners’ funds?	Weak ownership base
Interest coverage ratio	How many times earnings cover interest?	Difficulty in paying interest

Think of a company like a building.

Debt equity ratio tells you how much of the building is supported by borrowed pillars compared with owner pillars.

Proprietary ratio tells you how deep the owner’s foundation is.

Interest coverage ratio tells you whether the building can handle the regular cost of those borrowed pillars.

Important Terms You Must Know First

Before calculating the ratios, you need to identify three amounts properly:

1. Shareholders’ funds
2. Long-term debt
3. Profit before interest and tax

If these three are clear, most ratio questions become simple.

Shareholders’ Funds

Shareholders’ funds are the owners’ funds of a company.

They usually include:

• share capital
• reserves and surplus
• balance in Statement of Profit and Loss, if positive
• money received against share warrants, if given

For school-level questions, the most common calculation is:

Formula	Meaning
Shareholders’ Funds = Share Capital + Reserves and Surplus	Owners’ stake in the company

If accumulated losses or a debit balance of Statement of Profit and Loss is given, it is normally deducted from shareholders’ funds.

Long-Term Debt

Long-term debt means borrowed funds that are not payable within a short period.

It may include:

• debentures
• long-term loans
• bonds
• long-term borrowings

In many questions, long-term provisions may also be included when the question or format treats them as long-term debt.

Current liabilities are not normally included in debt equity ratio. Trade payables, outstanding expenses, short-term provisions, and bank overdraft are usually part of short-term obligations, not long-term debt for this ratio.

This is one of the most common mistakes in ratio analysis.

Profit Before Interest and Tax

Interest coverage ratio uses profit before interest and tax. This is also called PBIT or EBIT.

It means profit before deducting:

• interest on long-term debt
• tax

If the question gives net profit before interest and tax directly, use it.

If the question gives net profit after tax, you may need to add back tax and interest to reach profit before interest and tax.

Given in the question	How to reach PBIT
Profit before interest and tax	Use directly
Profit before tax	Add interest
Profit after tax	Add tax and interest
Net profit after interest but before tax	Add interest

Debt Equity Ratio Meaning

Debt equity ratio shows the relationship between long-term debt and shareholders’ funds.

It answers this question:

How much long-term borrowing is being used for every rupee of owners’ funds?

The formula is:

Formula	Meaning
Debt Equity Ratio = Long-term Debt / Shareholders’ Funds	Compares borrowed long-term funds with owners’ funds

It is usually written as a ratio, such as:

0.67 : 1

This means the company has Rs. 0.67 of long-term debt for every Rs. 1 of shareholders’ funds.

How to Interpret Debt Equity Ratio

A higher debt equity ratio means the company depends more on borrowed funds.

This can increase risk because interest and repayment obligations are fixed.

A lower debt equity ratio means the company depends more on owners’ funds.

This is usually safer for lenders, but it does not automatically mean the company is better managed. Some businesses can use reasonable debt to grow profitably.

Debt equity ratio	General meaning
High	More reliance on long-term debt
Low	More reliance on shareholders’ funds
Very high	Greater financial risk
Very low	Less financial risk, but possibly conservative financing

For exams, the safest interpretation is:

• higher ratio means higher use of debt and higher financial risk
• lower ratio means stronger owners’ support and more safety for lenders

Proprietary Ratio Meaning

Proprietary ratio shows the relationship between shareholders’ funds and total assets.

It answers this question:

How much of the company’s assets are financed by owners’ funds?

The common formula is:

Formula	Meaning
Proprietary Ratio = Shareholders’ Funds / Total Assets	Shows owners’ contribution in financing assets

Some questions or textbooks may use capital employed or net assets in the denominator. When your question gives a specific formula or format, follow that. But the idea remains the same: the ratio studies the strength of owners’ funds in the business.

Proprietary ratio is usually written as:

0.52 : 1

This means Rs. 0.52 of every Re. 1 of assets is financed by shareholders’ funds.

How to Interpret Proprietary Ratio

A higher proprietary ratio usually means a stronger financial position.

Why?

Because more assets are financed by owners’ funds. This gives more security to lenders and shows lower dependence on outside funds.

A lower proprietary ratio means a smaller portion of assets is supported by owners’ funds. This may show higher dependence on outside liabilities.

Proprietary ratio	General meaning
High	Stronger owners’ contribution and better long-term safety
Low	Greater dependence on outside funds
Increasing over time	Ownership base may be improving
Falling over time	Borrowing or liabilities may be growing faster than owners’ funds

This connection helps you avoid treating each ratio like an isolated formula.

Interest Coverage Ratio Meaning

Interest coverage ratio shows how many times profit before interest and tax covers interest on long-term debt.

It answers this question:

Can the company pay interest comfortably out of its earnings?

The formula is:

Formula	Meaning
Interest Coverage Ratio = Profit Before Interest and Tax / Interest on Long-term Debt	Shows how many times earnings cover interest

It is written in times, such as:

4.5 times

This means the company’s profit before interest and tax is 4.5 times its interest obligation.

How to Interpret Interest Coverage Ratio

A high interest coverage ratio generally means the company can pay interest comfortably.

A low interest coverage ratio is a warning sign. It means profit may not be enough to cover interest safely.

Interest coverage ratio	General meaning
High	Stronger ability to pay interest
Low	Higher risk for lenders
Less than 1	Earnings are not enough to cover interest
Falling over time	Interest burden may be becoming uncomfortable

But a very high interest coverage ratio also needs context. It may mean the company is very profitable, or it may mean the company uses very little debt.

This makes your answer sound more complete.

Formula Summary Table

Here is the clean revision table:

Ratio	Formula	Expressed as
Debt Equity Ratio	Long-term Debt / Shareholders’ Funds	Ratio, such as 0.67 : 1
Proprietary Ratio	Shareholders’ Funds / Total Assets	Ratio, such as 0.52 : 1
Interest Coverage Ratio	Profit Before Interest and Tax / Interest on Long-term Debt	Times, such as 4.5 times

The biggest difference is this:

• debt equity ratio compares debt with owners’ funds
• proprietary ratio compares owners’ funds with assets
• interest coverage ratio compares earnings with interest

Solved Example

From the following information, calculate debt equity ratio, proprietary ratio, and interest coverage ratio.

Particulars	Amount
Equity share capital	Rs. 4,00,000
Reserves and surplus	Rs. 2,00,000
10 percent debentures	Rs. 3,00,000
Long-term loan	Rs. 1,00,000
Current liabilities	Rs. 1,50,000
Total assets	Rs. 11,50,000
Profit before interest and tax	Rs. 1,80,000
Interest on long-term debt	Rs. 40,000

Step 1: Calculate Shareholders’ Funds

Particulars	Amount
Equity share capital	Rs. 4,00,000
Add: Reserves and surplus	Rs. 2,00,000
Shareholders’ funds	Rs. 6,00,000

Step 2: Calculate Long-Term Debt

Particulars	Amount
10 percent debentures	Rs. 3,00,000
Add: Long-term loan	Rs. 1,00,000
Long-term debt	Rs. 4,00,000

Current liabilities are not added because the debt equity ratio uses long-term debt.

Step 3: Debt Equity Ratio

Debt Equity Ratio = Long-term Debt / Shareholders' Funds
                  = Rs. 4,00,000 / Rs. 6,00,000
                  = 0.67 : 1

So, the debt equity ratio is 0.67 : 1.

This means the company has Rs. 0.67 of long-term debt for every Rs. 1 of shareholders’ funds.

Step 4: Proprietary Ratio

Proprietary Ratio = Shareholders' Funds / Total Assets
                  = Rs. 6,00,000 / Rs. 11,50,000
                  = 0.52 : 1

So, the proprietary ratio is 0.52 : 1.

This means about Rs. 0.52 of every Re. 1 of assets is financed by shareholders’ funds.

Step 5: Interest Coverage Ratio

Interest Coverage Ratio = Profit Before Interest and Tax / Interest on Long-term Debt
                        = Rs. 1,80,000 / Rs. 40,000
                        = 4.5 times

So, the interest coverage ratio is 4.5 times.

This means earnings cover the interest obligation 4.5 times.

How the Three Ratios Work Together

The best way to understand these ratios is to read them together.

Situation	What it may suggest
High debt equity ratio and low proprietary ratio	The company relies heavily on outside funds
Low debt equity ratio and high proprietary ratio	The company is mainly financed by owners’ funds
High debt equity ratio but strong interest coverage	Debt may be manageable because earnings are strong
Low debt equity ratio but weak interest coverage	Even small debt may be difficult if profits are weak

This is why interest coverage ratio is so important. Debt equity ratio tells you the amount of debt. Interest coverage ratio tells you whether the company can bear the cost of that debt.

The same debt level can feel safe or risky depending on profit.

Common Mistakes Students Make

Mistake 1: Including Current Liabilities in Long-Term Debt

Trade payables, outstanding expenses, and short-term provisions are not usually included in long-term debt for debt equity ratio.

Use long-term borrowings such as debentures and long-term loans.

Mistake 2: Forgetting Reserves and Surplus

Shareholders’ funds are not just share capital.

They also include reserves and surplus. If you leave out reserves, both debt equity ratio and proprietary ratio may become wrong.

Mistake 3: Using Profit After Tax for Interest Coverage Ratio

Interest coverage ratio uses profit before interest and tax.

If you use profit after tax directly, the answer will be too low and the logic will be wrong.

Mistake 4: Writing Interest Coverage Ratio as a Percentage

Interest coverage ratio is written in times.

For example:

Interest Coverage Ratio = 4.5 times

Do not write it as 450 percent unless the question specifically asks for a percentage interpretation.

Mistake 5: Treating Every High Debt Equity Ratio as Bad

A higher debt equity ratio means higher financial risk, but the final judgement depends on profit stability and interest coverage.

If earnings are strong and interest coverage is comfortable, debt may still be manageable.

Quick Revision Method

Before solving any question, make three small boxes in your rough work:

Shareholders' Funds
Long-term Debt
Profit Before Interest and Tax

Fill these boxes first.

Then apply the formulas.

This simple habit prevents most errors because you are not directly jumping from the balance sheet to the answer.

Exam-Ready Interpretation Lines

You can use these lines in answers when interpretation is required.

Ratio	Interpretation line
Debt equity ratio	It shows the relationship between long-term debt and shareholders’ funds. A higher ratio indicates greater dependence on borrowed funds and higher financial risk.
Proprietary ratio	It shows the proportion of total assets financed by shareholders’ funds. A higher ratio indicates a stronger ownership base and better long-term financial safety.
Interest coverage ratio	It shows how many times profit before interest and tax covers interest on long-term debt. A higher ratio indicates better ability to pay interest.

These lines are short, clear, and easy to remember.

Frequently Asked Questions

1. Are debt equity ratio, proprietary ratio, and interest coverage ratio solvency ratios?

Yes. All three are solvency ratios because they help judge the long-term financial strength of a business.

Debt equity ratio studies the use of long-term debt. Proprietary ratio studies the owners’ share in financing assets. Interest coverage ratio studies the ability to pay interest.

2. What is the formula for debt equity ratio?

The formula is:

Debt Equity Ratio = Long-term Debt / Shareholders' Funds

It is usually written as a ratio, such as 0.67 : 1 or 1 : 1.

3. What is included in shareholders’ funds?

Shareholders’ funds usually include share capital and reserves and surplus.

If the question gives a positive balance in Statement of Profit and Loss, it is generally added. If it gives accumulated losses or a debit balance, it is generally deducted.

4. Is bank overdraft included in debt equity ratio?

Usually no. Bank overdraft is normally treated as a short-term liability, while debt equity ratio focuses on long-term debt.

If a question gives a special instruction, follow that instruction.

5. What is the formula for proprietary ratio?

The common formula is:

Proprietary Ratio = Shareholders' Funds / Total Assets

Some formats use capital employed or net assets in the denominator. The concept remains the same: it measures the portion of assets financed by owners’ funds.

6. What is a good proprietary ratio?

A higher proprietary ratio is generally safer because it shows that a larger part of assets is financed by owners’ funds.

But there is no single perfect ratio for every business. It should be compared with past years, similar businesses, and the nature of the company.

7. What is the formula for interest coverage ratio?

The formula is:

Interest Coverage Ratio = Profit Before Interest and Tax / Interest on Long-term Debt

It is written in times, such as 3 times, 4 times, or 5 times.

8. Why is interest coverage ratio not written as a normal ratio?

Because it tells how many times earnings cover interest.

So, writing “4 times” is clearer than writing “4 : 1”. It directly shows that profit before interest and tax is four times the interest cost.

9. Can a company have high debt equity ratio but still be safe?

It can be safer than it looks if its earnings are stable and its interest coverage ratio is strong.

But high debt still increases fixed financial obligations. That is why debt equity ratio should be read with interest coverage ratio.

10. Which ratio should I calculate first in a question?

Start by calculating shareholders’ funds and long-term debt.

After that, debt equity ratio and proprietary ratio become easier. Then calculate profit before interest and tax for interest coverage ratio.