Debt-to-Equity Ratio Explained: How Borrowing Helps a Business Grow

Mahesh runs a small kirana store in a crowded lane in Kanpur.

For years, his store has been steady. Every month, the shop brings in around ₹1,20,000 in sales. After paying suppliers, electricity, and helpers, about ₹20,000 remains as profit.

The shop itself was built using Mahesh’s savings — roughly ₹3,00,000.

So the entire business is running on his own money.

One day, Mahesh notices something.

The neighbouring street has no kirana store. Residents walk almost ten minutes to buy basic groceries. If Mahesh opens a second shop there, the demand looks obvious.

The problem is money.

Opening another store would cost about ₹3,00,000 — shelves, initial inventory, a refrigerator, and a security deposit.

Mahesh only has ₹50,000 left in savings.

A local cooperative bank offers him a loan of ₹2,50,000.

Mahesh takes it.

Six months later, the second shop works. Together, the two stores now generate ₹2,40,000 in monthly sales and roughly ₹40,000 in profit.

Mahesh’s own money in the business: ₹3,50,000
Money borrowed from the bank: ₹2,50,000

Someone looking at the structure would say:

Mahesh’s Debt-to-Equity Ratio is 0.71.

That number simply compares borrowed money to the owner’s money.

Debt-to-Equity Ratio = Debt ÷ Equity

In Mahesh’s case:

₹2,50,000 ÷ ₹3,50,000 = 0.71

Which means for every ₹1 Mahesh invested, he borrowed ₹0.71.

Now imagine a different version.

Suppose Mahesh had borrowed ₹8,00,000 instead — opening three stores at once. The monthly profit might still be ₹40,000 while loan payments climb sharply.

Same business.
Same owner.

But now the borrowed money is heavier than the profit the shops produce.

The difference between those two situations is what the Debt-to-Equity ratio quietly reveals.

Good sign:
Borrowed money helps the business earn more than the cost of the loan.

Bad sign:
Borrowed money grows faster than the profit the business produces.

Why it matters:
Debt multiplies outcomes — good businesses improve faster, weak businesses collapse faster.

The beginner version sounds neat:

Low Debt-to-Equity = safe company.
High Debt-to-Equity = risky company.

That logic feels intuitive.

It’s also incomplete in ways that quietly mislead investors.

Start with the obvious exception.

Banks.

A bank operating with low debt would be strange.

Deposits are technically debt on the balance sheet.

Yet banks regularly operate with Debt-to-Equity ratios above 8× or 10×.

That doesn’t automatically mean the bank is fragile — it means the business model itself relies on leverage.

A company with zero debt can still be a weak business.

Imagine a manufacturer earning 6% return on capital while competitors earn 18%.

Even with no loans, the company is quietly destroying value because its capital earns less than what investors could earn elsewhere.

Debt didn’t cause the weakness.

The business model did.

There’s another pattern experienced investors watch closely.

Sometimes a falling Debt-to-Equity ratio looks healthy — but the improvement comes from shrinking operations rather than strengthening economics.

The ratio improves.
The business deteriorates.

That’s the trap.

Debt ratios describe structure, not strength.

Treating them as a direct measure of safety often leads investors to the wrong conclusion.

When I evaluate leverage, the ratio itself is only the starting point.

What matters more is how the business behaves under that leverage.

The first number I watch is interest coverage — operating profit divided by interest cost.

Example:

The ratio between profit and interest payments often matters more than the Debt-to-Equity number itself.

The second pattern I track is cycle sensitivity.

Over the last fifteen years, many Indian mid-cap steel companies operated comfortably with Debt-to-Equity ratios of around 1.5–2.0 during expansion phases.

During downturns:

The ratio didn’t change immediately.

Cash flow did.

Within six quarters, several of those companies went from manageable leverage to distress.

Debt exposes businesses to timing risk.

Cash flow arrives unevenly.
Loan obligations do not.

The third signal I watch is debt expansion speed.

In the last infrastructure cycle around 2016–2019, several engineering firms expanded leverage from 0.8× to nearly 3× Debt-to-Equity within two years.

Revenues took longer to materialise than expected.

Balance sheets absorbed the gap.

The market repriced those companies long before profits recovered.

Debt doesn’t destroy companies instantly.

It compresses time.

Good decisions compound faster.
Bad decisions surface sooner.

That acceleration is what investors are actually measuring when they look at leverage.

Debt-to-Equity works best for asset-heavy businesses, such as:

In those industries, debt often funds physical assets that generate predictable cash flows.

The ratio becomes far less informative in asset-light models.

Examples include:

These operate with very little physical capital.

Equity dominates the balance sheet by design.

A low Debt-to-Equity ratio there tells you almost nothing about the business’s economic quality.

There’s another edge I still wrestle with.

During periods of extremely low interest rates — like the global environment between 2019 and 2021 — leverage often appears safer than it truly is.

Cheap credit:

When rates normalise, the balance sheet reality reappears.

I’m not fully convinced yet, that traditional leverage thresholds capture that shift well.

The data from the current rate cycle is still unfolding.

Lately, I’ve been tracking something unusual across several mid-cap consumer companies.

Over the last five quarters, their Debt-to-Equity ratios have remained stable — mostly between 0.6× and 0.9×.

Yet interest coverage has quietly fallen from 11× to around 6×.

The leverage number hasn’t changed.

The underlying pressure has.

I’m watching whether this compression continues into the next earnings cycle.

If it does, the balance sheet risk in that sector may be building earlier than most screens currently show.

Author Mr Chandravanshi

Nishant Chandravanshi — Mr Chandravanshi writes about judgment, decision-making, investing, and systems thinking.

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