CASA Ratio Explained: Meaning, Formula and Importance for Banks

Your salary comes in. Your rent goes out, EMIs get debited, bills get paid, and somewhere in between, you check your balance and move on. The account doing all of this work has a name in banking: a CASA account. Most people never stop to think about it until they are trying to understand their bank better.

What is a CASA Account?

CASA stands for Current Account and Savings Account. A current account savings account is the collective term banks use for these two deposit types. These are not investment products but everyday banking tools that individuals and businesses use to move, store and access money.

When you keep money in a savings account, the bank usually pays you around 2.5%–4.0% interest. When you keep money in a current account, it pays you nothing. Compare that to a fixed deposit, where the bank usually pays 6.50%–7.25%.

The more deposits a bank can hold in CASA accounts rather than fixed deposits, the less it spends on interest, and the more it earns when it lends that money out. That gap between what a bank pays depositors and what it earns from borrowers is where banking profitability is made or lost.

Components of CASA Accounts

A savings account is built for individuals. It holds your money, pays modest interest, and keeps funds accessible at any time. Most major banks currently offer around 2.5%–4% p.a. on savings balances ICICI Bank offers 2.5% p.a. across all balances as of 2026. Some small finance banks offer 7.0%–7.5% p.a. on higher balance slabs.

A current account is built for businesses. It pays no interest but offers overdraft facilities, unlimited transactions and cash management tools. For a business moving money constantly, flexibility matters far more than yield and that is what a current account is designed around.

Difference Between Savings and Current Account

The difference between saving and current account lies in how they are used.

A salaried individual putting money into a current account would earn no interest and likely face higher minimum balance requirements for no benefit. A business using a savings account for daily operations would quickly run into transaction limits. Knowing which account suits your situation means your money stays accessible, your costs stay low, and your banking does what you actually need it to.

What is CASA Ratio?

The CASA ratio tells you how much of a bank's total deposits come from current and savings accounts, as opposed to fixed deposits and other instruments.

Formula: CASA Ratio = (Current Account Deposits + Savings Account Deposits) ÷ Total Deposits × 100

A bank with a high CASA ratio is funding its loans cheaply—paying up to 3.5% on deposits instead of 6.50%–7.25%. That means healthier margins, stronger profitability, and more room to offer competitive products.

India's overall banking CASA ratio fell to 38.9% in FY25 from 43.7% in FY22. When FD rates rose sharply, customers moved surplus savings into term deposits.

Here is how India's largest banks stand when it comes to CASA ratio:

Benefits of CASA Accounts for Customers

The interest on a savings account is modest by design. These accounts are not built to grow your money. They are built to keep it safe and accessible. Think of a CASA account the way you would think of a wallet: you need it every day, but you would not keep all your money in it. The real value of a CASA account for customers lies in three things.

Liquidity: Your money is available the moment you need it—no lock-ins, no exit penalties, no processing delays.

Safety: Deposits at RBI-regulated banks are insured by the Deposit Insurance and Credit Guarantee Corporation (DICGC) up to ₹5 lakh per depositor per bank.

Utility: UPI payments, NEFT transfers, salary credits, direct debits—India's entire payment infrastructure runs through savings and current accounts.

CASA Account Opening Process

CASA account opening in India is now fully digital at most banks. The steps are straightforward:

1. Decide the account type savings for personal use, current for business.
2. Apply on the bank's website or in the mobile app, or visit a branch.
3. Submit Aadhaar and PAN for KYC.
4. Complete a Video KYC call if the bank asks for it.
5. Fund the account with the minimum balance, which ranges from zero at some banks to ₹10,000 or more at others.

If you’re following the process online, CASA account opening can be instant or take up to a few hours. If you’re visiting the branch, it usually takes up to two working days.

CASA vs Fixed Deposits

A savings account and a fixed deposit serve different purposes. The right choice depends on one question: when do you need this money?

Money you need access to in the next few weeks belongs in your savings account. Money you can set aside for six months or more should be in an FD.

Limitations of CASA Accounts

Not ideal for capital preservation: At 2.5%–3.5% p.a., a savings account loses real value when inflation runs above that rate.

Minimum balance penalties: Many banks require a monthly average balance and charge if you fall below it. The threshold varies by account type, bank and branch location worth checking before you open.

Low returns: Anything you do not need in the near term is better placed in an instrument that offers a higher interest rate, like a fixed deposit.

Conclusion

Think of your CASA account as the base layer of your finances essential, but not where growth happens. Use it for salary, daily expenses, bill payments and short-term liquidity. Keep three to six months of expenses there for emergencies, and allocate the rest to instruments offering higher interest rates.

If you have a fixed goal and timeline, an FD is the logical next step. If you are investing for the long term, mutual funds or bonds are a good option. The decision is straightforward: match the instrument to the job, and your savings account will do exactly what it is meant to.