Indian Banks' Cash Surplus Falls 96% as RBI Rupee Defence Lifts Borrowing Costs

From Rs 11 Trillion to Rs 462 Billion in Weeks

Indian banks' excess cash fell from Rs 11 trillion in early September to Rs 462 billion on October 26, 2026, as the Reserve Bank of India limited liquidity support while defending the rupee. The decline, measured by a Bloomberg Economics index, amounts to about 96%, leaving lenders with a much smaller cushion to meet payments and fund their operations.

The pressure is already reaching beyond banks. Overnight borrowing costs have moved above the RBI's 5.5% policy repo rate, rates on new bank certificates of deposit have reached a seven-month high, and some non-bank lenders are paying more to raise money. The government has also faced weaker demand and higher borrowing costs at debt auctions.

The RBI has supplied temporary funds, including Rs 1.5 trillion on October 26, but has repeatedly provided less than banks requested. Analysts at IDFC First Bank and Emkay Global Financial Services expect tight conditions to persist, interpreting the limited support as part of the effort to discourage bets against the rupee.

The central bank now faces competing pressures: making rupees expensive to borrow can help support the currency, while the same squeeze raises funding costs for banks, finance companies and the government.

Why Less Cash Can Help Defend the Rupee

The rupee approached a record low earlier in October, prompting the RBI to take measures to support it. One channel runs directly through the banking system: when the central bank sells dollars and receives rupees, it removes rupees from circulation unless it puts that money back through another operation.

A trader expecting the rupee to weaken can borrow rupees and use them to buy dollars. Higher rupee borrowing costs make that position more expensive to maintain. They can also increase the cost of protecting against further currency weakness.

Madhavi Arora, chief economist at Emkay Global Financial Services, described the liquidity squeeze as a deliberate choice:

The tightness seems intentional,

Arora said the RBI's actions appeared designed to raise the cost of both hedging against rupee weakness and betting against the currency. Her assessment helps explain why the central bank might supply enough money to keep payments functioning without restoring the large surplus banks held in September.

RBI Governor Sanjay Malhotra has said monetary policy can sometimes address risks to financial stability. Asked whether interest rates could be part of the currency defence toolkit, he said the rate-setting committee "certainly deliberates on" the matter. The duration of the current liquidity squeeze has not been announced.

Tax Payments and Cash Withdrawals Add Pressure

Goods and Services Tax payments, cash withdrawals ahead of Diwali and tighter daily cash reserve requirements have also reduced funds available to banks. Tax payments move money from customer accounts into government accounts, while withdrawals turn bank deposits into currency held by households and businesses.

Higher reserve requirements leave banks with less cash available for other uses. The tighter daily requirement took effect on October 16, adding another drain as lenders were already adjusting to currency intervention and seasonal payments.

ICICI Bank put the banking system's surplus at Rs 500 billion on October 23, equivalent to 0.2% of net demand and time liabilities. That measure broadly covers bank deposits and certain other obligations. A surplus this small relative to those liabilities leaves less room to absorb sudden payment demands.

The reversal follows a period of abundant cash linked partly to foreign currency non-resident bank deposit swaps with the RBI. Such swaps exchange currencies with an agreement to reverse the transaction later. Average daily net absorption under the RBI's liquidity adjustment facility rose from Rs 1.2 trillion in July to Rs 5.8 trillion in August, when the central bank was taking excess money out of the system.

How Much Banks Requested and Received

The RBI has used variable rate repo auctions to supply temporary cash. In these operations, banks offer eligible securities as collateral and bid for funds, with the borrowing rate determined through the auction. The money must be repaid when the operation ends.

October's auction results show how demand repeatedly exceeded the amounts supplied:

• October 14: The interbank call rate had begun a sustained period above the 5.5% repo rate.
• October 16: Tighter daily cash reserve requirements took effect.
• October 19: Banks sought about Rs 1.5 trillion and received Rs 1 trillion.
• October 22: Banks requested Rs 1.62 trillion and received Rs 500 billion.
• October 26: Banks requested Rs 1.86 trillion and received Rs 1.5 trillion. The cash surplus stood at Rs 462 billion.

On October 22, the RBI supplied about 31% of the amount banks requested. By October 26, it supplied about 81%, providing more relief while still leaving Rs 360 billion of bids unmet. The largest support amount cited during this period was Rs 1.5 trillion.

A seven-day repo operation worth Rs 1 trillion also provided banks with temporary funding. ICICI Bank expects further liquidity operations, although temporary injections expire and therefore require repayment or replacement if cash remains scarce.

Borrowing Costs Rise Without Another Repo Increase

The interbank call rate, the price banks pay to borrow from one another overnight, rose to around 5.9% from 5.65% during the period. At 5.9%, it was 0.4 percentage points above the RBI's 5.5% repo rate.

The RBI had raised the repo rate to 5.5% earlier in October and moved its policy stance to calibrated tightening, signalling readiness to tighten further. The subsequent rise in market rates shows that borrowing conditions can become more restrictive between formal policy decisions.

The repo rate is a key policy price, but banks also need access to funds at that price. When cash is scarce and auction allotments fall short of demand, lenders may pay more in the market. That is how liquidity management can make money more expensive without another announced repo increase.

Weekly averages show the pressure across several markets. The call rate rose to 5.70% from 5.48%, the market repo rate increased to 5.66% from 5.37%, and the triparty repo rate reached 5.65% from 5.55%. Repo transactions involve borrowing against securities; in a triparty repo, an intermediary manages the collateral and settlement.

These increases pushed overnight rates toward the upper end of the RBI's policy corridor. The corridor is the range between the rate the central bank pays to absorb overnight funds and the rate it charges through its emergency overnight lending facility.

Finance Companies Face More Expensive Funding

Rates on newly issued certificates of deposit maturing in three and six months rose about 40 to 50 basis points in the preceding week, reaching a seven-month high. Certificates of deposit allow banks to borrow money for a fixed period. A basis point is one hundredth of a percentage point, so 50 basis points equals half a percentage point.

Non-bank financial companies are also paying more. Yields on their commercial paper increased from about 7.85% in the middle of October to around 8.4%, a rise of 55 basis points. Commercial paper is short term borrowing issued by companies rather than a conventional bank loan.

Higher funding costs can squeeze finance companies' earnings or lead them to charge more when they make new loans. For borrowers, the effect depends on the lender, the loan contract and how quickly new funding costs feed into lending decisions.

Ajay Manglunia, executive director at Capri Global Capital, a non-bank lender, described how economic conditions and oil prices could affect investors' demands:

There is a lot of uncertainty on where rates will go from here, but if the macro situation stays as is and crude oil prices inch higher, investors will want a premium on their investments,

Manglunia added:

The borrowing cost curve can get steeper.

That means investors may demand a larger extra return for lending over longer periods. Overnight indexed swap rates have also risen roughly 30 to 60 basis points across maturities. These contracts exchange a fixed interest rate for one linked to overnight rates, making them a useful measure of changing interest rate expectations.

Government Debt Auctions Show the Strain

The RBI rejected all bids at a Treasury bill auction intended to raise Rs 230 billion through securities maturing in 91, 182 and 364 days. Dealers interpreted the decision as discomfort with the borrowing rates investors were demanding.

Treasury bill yields had already climbed sharply. Between September 9 and October 14, yields increased by 64 basis points for bills maturing in 91 days, 83 basis points for those maturing in 182 days and 69 basis points for those maturing in 364 days.

At the preceding auction, the respective yields were 5.73%, 6.29% and 6.49%. The yield on the 364-day bill stood 99 basis points above the 5.5% repo rate, the widest gap in four years.

Longer government debt also came under pressure. The benchmark government bond maturing in 10 years closed at 7.44%, up from 7.39% in the previous session and its highest level since November 4, 2022. Bond yields rise when prices fall, increasing the return buyers demand.

ICICI Bank's assessment of a government securities auction put the average borrowing cost at 7.60%, up 20 basis points. Bids totalled 1.9 times the amount offered, compared with a long term average of 2.8 times. That lower ratio points to a thinner cushion of demand at the auction.

Oil Prices Complicate the RBI's Choices

Crude oil rose from around $100 to $105 a barrel to about $115 during the period, adding inflation concerns to the funding squeeze. India imports substantial amounts of oil, so higher dollar prices can increase import costs and demand for foreign currency.

A weaker rupee makes those imports more expensive in local currency. Currency pressure and rising oil prices can therefore reinforce each other, making it harder for the RBI to ease domestic funding conditions while also containing inflation risks.

ICICI Bank expects the benchmark government bond yield to trade between 7.40% and 7.60% in the near term. Market expectations of a possible 50 basis point repo increase in December have also grown, although that remains a market expectation rather than an announced decision.

What Could Ease the Cash Squeeze?

Government spending toward the end of October could return money to businesses and households, rebuilding deposits and bank liquidity after tax collections pulled funds out. Government securities worth Rs 354 billion were also due to mature, potentially releasing cash to their holders.

Those flows could reduce pressure on overnight rates, while further RBI repo operations could provide additional temporary relief. Persistent dollar sales, cash demand or reserve requirements would work in the other direction.

Investors were also watching that week's policy decisions from the US Federal Reserve, European Central Bank and Bank of Japan, alongside US economic growth data for the third quarter. Changes in overseas interest rates can affect currency trading and the returns investors demand on Indian debt.

For domestic borrowers, the immediate issue is the price at which banks and finance companies replace maturing funding. The October figures show that defending the rupee is already carrying a cost through India's money and bond markets, even between formal changes to the policy rate.

Key Points

• Banks' excess cash fell about 96%, from Rs 11 trillion in early September to Rs 462 billion on October 26.
• The RBI repeatedly supplied less temporary funding than banks requested, while currency intervention, taxes, withdrawals and reserve requirements drained cash.
• The interbank call rate reached around 5.9%, above the 5.5% repo rate.
• Bank certificate of deposit rates and non-bank commercial paper yields rose, increasing funding costs.
• The RBI rejected all bids at a Rs 230 billion Treasury bill auction as government borrowing rates climbed.
• Government spending and maturing securities could provide relief, while higher oil prices add pressure on inflation and the rupee.