How Interest Rates Influence Corporate Borrowing and Valuation

Rates Reach Companies Through More Than One Door

When the RBI changes the repo rate, the headline is usually about home loan EMIs. For companies, the effect is wider. A rate change reaches a business through four separate channels, and they work at different speeds.

Understanding all four matters, because the one most people focus on, the interest bill, is often not the one that moves share prices the most.

Door 1: The Cost of Borrowing

The repo rate is the rate at which the RBI lends to banks. Changes pass to companies in several ways:

• Bank loans linked to an external benchmark (EBLR loans), mostly for retail borrowers and small businesses, reprice within months.
• Loans linked to a bank's own lending rate (MCLR), which most large companies use, reset every six or twelve months.
• Bonds and commercial paper reprice only when the company issues new debt. A ten-year bond issued two years ago keeps its coupon.
• Credit spreads, the extra rate a company pays over government bonds, often widen when rates rise, because lenders become more cautious.

So two companies facing the same rate change can see very different increases in their interest bill, depending on how their debt is structured.

Door 2: The Discount Rate

A company's value is the present value of its future cash flows. The discount rate used starts from the risk-free rate, usually the 10-year government bond yield. When that yield rises, every future rupee is worth less today.

This affects every company, whether or not it has any debt.

Door 3: Demand

Higher rates make borrowing more expensive for customers too. Housing, cars, consumer durables and capital goods are sensitive to loan rates. Companies selling these products feel the effect in sales volumes, usually with a lag of a few quarters.

Door 4: The Currency and Capital Flows

Interest rate differences between countries affect where global money goes. When US rates rise faster than Indian rates, foreign investors may move money out of India, weakening the rupee. This changes costs for importers and revenues for exporters.

A Worked Example: One Company, Two Effects

Illustrative example. A company generates free cash flow of ₹300 crore a year, growing at 5% forever. It has ₹2,000 crore of floating-rate debt. Its cost of capital is 11%.

Now interest rates rise by one percentage point.

• Interest bill: rises by ₹20 crore a year (1% × ₹2,000 crore), or about ₹15 crore after tax.
• Discount rate: suppose the company's cost of capital rises by 0.6 percentage points, to 11.6%. Enterprise value falls from ₹5,000 crore (300 ÷ 6%) to about ₹4,545 crore (300 ÷ 6.6%), a fall of about 9%.

The extra interest is small next to the fall in value from a higher discount rate. For shareholders, the discount-rate door often matters most.

The Most Exposed Companies

• High debt with floating rates. The interest bill rises quickly, and shareholders absorb all of it.
• Long-duration growth companies, whose value rests on cash flows far in the future.
• Rate-sensitive sectors, such as real estate, autos, NBFCs and capital goods.
• Companies with debt maturing soon, which must refinance at higher rates.

Those least affected are cash-rich companies with steady, near-term cash flows and little debt.

Rates Also Change Access to Credit

Price is not the only thing that changes when rates rise. Availability changes too. Banks tighten lending standards, bond investors demand more protection, and the weakest borrowers can find that no one will lend at any reasonable rate.

This matters most for companies that rely on rolling over short-term debt. In 2018, after IL&FS defaulted, funding for many NBFCs dried up within weeks, even for those that were profitable. Their problem was not the cost of money but access to it.

Rate Cuts Work in Reverse, but Unevenly

The same four doors open the other way when rates fall. Interest bills shrink, discount rates fall, demand picks up and the currency may strengthen. But the effects arrive at different speeds. During the 2025 cutting cycle, loans linked to the repo rate repriced quickly, while bond yields and the rates on many corporate loans fell more slowly. A company's benefit from a rate cut depends on the same details of its debt as its pain from a rate rise.

The 2026 Backdrop

After cutting the repo rate by a total of 1.25 percentage points in 2025, the RBI raised it by 0.25 points to 5.50% on 7 October 2026, its first increase since February 2023, and moved its stance to "calibrated tightening." By late October, the 10-year government bond yield had risen to about 7.45%, its highest since March 2023, and swap markets were pricing in further increases over the next year.

For companies, that means higher borrowing costs at the next loan reset or refinancing, and a higher starting point for every discount rate.

Habits for Reading Rate Changes

1. Check the debt mix: floating or fixed, bank loans or bonds, rupee or foreign currency.
2. Note the debt maturity profile in the notes to the accounts.
3. Compare interest coverage before and after a rate change.
4. Update the discount rate in any valuation when bond yields move.
5. Think about customers' borrowing costs, not just the company's.

The Reframe

An interest rate change is not just a cost on a company's loans. It is a change in the price of time. Everything that depends on the future, from loans to valuations to customer demand, gets repriced.