Understanding Long-Term Solvency Ratios: Debt to Equity and More

Every lender, investor, and finance student eventually runs into the same question: can this company survive its own debt? That’s exactly what long-term solvency ratios are built to answer. Unlike liquidity ratios, which check if a company can pay bills due this month, solvency ratios look further out, gauging whether a business can honour its long-term obligations without collapsing under interest payments or loan repayments. In this post, we’ll break down the three ratios that matter most here: the debt to equity ratio, the interest coverage ratio, and the fixed charge coverage ratio.

What long-term solvency actually means 🔗

Solvency is different from profitability. A company can report healthy profits on paper and still struggle to survive if too much of that profit is locked up servicing debt. Solvency ratios focus on whether a business can comfortably service its debt obligations over the long term, which makes them essential reading for banks deciding on loan approvals, credit rating agencies, and shareholders trying to understand how risky a company’s capital structure really is.

At the core of solvency analysis is one simple trade-off: debt versus equity. Debt is cheaper and doesn’t dilute ownership, but it comes with fixed repayment obligations regardless of how the business performs. Equity is more expensive over time but doesn’t demand fixed payments. The ratios below help quantify exactly where a company sits on this spectrum.

Debt to equity ratio 🔗

This is the most commonly cited solvency ratio, and for good reason. It directly compares how much of a company’s financing comes from creditors versus owners.

Formula: Debt to Equity Ratio = Total Debt ÷ Total Equity

The ratio shows the percentage of financing contributed by creditors as compared to that of equity investors. A ratio of 1.0 means debt and equity are contributing equally to the business. Anything meaningfully above that suggests the company is leaning heavily on borrowed money.

How to read the numbers 🔗

A low debt to equity ratio generally signals a conservative, low-risk capital structure. A high one isn’t automatically bad, though. Capital-intensive sectors like infrastructure, power, or manufacturing routinely carry higher debt loads than service-based businesses such as IT or consulting, simply because their operations demand heavy upfront investment. Context matters as much as the number itself.

In the Indian regulatory context, this ratio isn’t just an analyst’s tool, it’s a formal disclosure requirement. Under Schedule III to the Companies Act, 2013, as amended by the Ministry of Corporate Affairs notification of March 2021, companies are required to disclose and explain movements in their debt to equity ratio alongside other key financial ratios in their annual reports. This pushed capital structure analysis out of textbooks and into standard corporate reporting.

Regulators also use hard thresholds in specific situations. For instance, when banks finance leveraged buyouts of distressed companies in India, the Reserve Bank of India requires the post-acquisition debt to equity ratio to stay within 3:1, calculated on a consolidated basis covering both the acquiring and target companies. This is a good example of how the same ratio students study in a textbook directly shapes real lending decisions.

What counts as an “ideal” ratio still varies by industry and analyst. Many analysts consider a debt to equity ratio of around 2.0 to be healthy across industries, though some capital-heavy sectors comfortably operate at 5 or higher without raising red flags, provided cash flows are stable enough to support it.

It’s worth noting how much this can move at an economy-wide level too. The Reserve Bank of India’s Financial Stability Report has tracked the proportion of “highly leveraged” companies, those with a debt to equity ratio of 3 or above, as a way of monitoring systemic risk in corporate India. When this proportion rises, it signals rising vulnerability across the banking sector too, since loan defaults by over-leveraged firms directly hit lenders’ balance sheets.

Interest coverage ratio 🔗

Debt to equity tells you how much debt exists. Interest coverage tells you whether the company can actually afford it. This ratio is also called the times interest earned ratio.

Formula: Interest Coverage Ratio = Earnings Before Interest and Taxes (EBIT) ÷ Interest Expense

Suppose a company reports EBIT of ₹24,00,000 and annual interest expense of ₹4,00,000. Its interest coverage ratio would be 6, meaning operating earnings are six times larger than what’s needed to cover interest payments for the year. That’s a comfortable cushion.

What counts as a safe ratio 🔗

A commonly used benchmark suggests seeking an interest coverage ratio of 1.5 or higher, since anything below that indicates the company may struggle to meet its interest obligations. A ratio close to or below 1 is a serious warning sign. It means the company’s core operations are barely generating enough, or not enough, to cover interest, leaving no room for principal repayment, taxes, or reinvestment.

Lenders watch this ratio closely because it’s a leading indicator of default risk, often before the debt to equity ratio itself starts looking alarming. A company can carry moderate debt levels and still run into trouble if a sudden earnings dip makes interest payments unaffordable.

Fixed charge coverage ratio 🔗

Interest coverage has one limitation: it only accounts for interest on debt. Most businesses today also carry lease rentals, equipment financing charges, and other recurring fixed commitments that don’t show up as traditional loan interest. The fixed charge coverage ratio fixes this gap.

Formula: Fixed Charge Coverage Ratio = (EBIT + Fixed Charges) ÷ (Interest Expense + Fixed Charges)

Fixed charge coverage measures a firm’s ability to pay fixed obligations such as debt principal, interest payments, rent, and utilities, making it a more conservative version of the interest coverage ratio since it factors in more expense categories. A company might comfortably cover interest payments alone but come under pressure once lease rentals and other fixed costs are added into the mix.

This distinction matters more today than it did a decade ago. Businesses running on leased office space, rented manufacturing equipment, or long-term service contracts carry fixed obligations that behave just like debt, they must be paid regardless of how sales perform. The fixed charge coverage ratio captures this hidden layer of financial commitment that a simple interest coverage calculation would miss entirely.

Reading all three ratios together 🔗

None of these ratios should be evaluated in isolation. A company might show a comfortable debt to equity ratio but a weak interest coverage ratio if its debt carries an unusually high interest rate. Conversely, strong interest coverage doesn’t rule out solvency risk if fixed charges from leases and rentals are quietly piling up outside the loan structure.

For management accounting students, the real skill isn’t memorising formulas, it’s learning to read these three ratios as a connected story about a company’s capital structure, its debt-servicing capacity, and how exposed it is to fixed commitments beyond traditional loans. A company that looks strong on one ratio but weak on another is usually hiding a risk that a single-ratio analysis would miss entirely.

What do you think? If you were analysing two companies with identical debt to equity ratios but very different interest coverage ratios, which one would you consider financially safer, and why? And how do you think leasing-heavy business models, common in retail and aviation, change the way we should interpret solvency ratios?

References

1. https://www.accountingtools.com/articles/what-are-solvency-ratios.html
2. https://www.wallstreetprep.com/knowledge/solvency-ratio/
3. https://www.mbgcorp.com/in/insights/demystifying-enhanced-financial-reporting-disclosures-ratio-analysis/
4. https://vinodkothari.com/2026/02/rbi-permits-leveraged-buy-outs-through-bank-finance/
5. https://cleartax.in/glossary/de-debt-equity-ratio
6. https://www.business-standard.com/article/pti-stories/no-of-highly-leveraged-cos-jumps-to-15-3-from-13-6-rbi-115122301022_1.html
7. https://www.invoiced.com/resources/blog/what-is-a-solvency-ratio
8. https://365financialanalyst.com/knowledge-hub/financial-analysis/solvency-ratios/