How Banks Calculate a Cash Credit Limit: The View From a Rice Mill

Our rice mill buys most of a season's paddy in a compressed harvest window and sells it down over the following months, milled into rice, bran, husk and broken rice. That shape is why I distrust any single formula for a cash credit limit. A limit sized to an average month would miss the one period that matters most: procurement, when the business pays farmers and suppliers well before it sells anything.

This guide explains the methods Indian banks actually use to size a working-capital limit, where each one applies under RBI's rules, what the bank checks beyond the formula, and why a seasonal business is usually assessed differently from a trader with steady monthly sales.

There is no single formula every bank uses

Business owners often go into a Cash Credit application expecting a formula: turnover times some fixed multiple, in; limit, out. In reality, Indian banks use more than one method to size a working-capital limit. The choice depends partly on the size of the limit and partly on the bank's own internal policy, and even within one method there is room for the bank's judgement. Understanding the two main methods, and where each really applies, is more useful than memorising a single ratio.

The projected-turnover method (and the "25% of turnover" idea)

The turnover-based method, associated with the Nayak Committee's simplified approach from the early 1990s, works like this in its textbook form: a business's working-capital requirement is assumed to be roughly 25% of its projected annual turnover, split as 20% financed by the bank and 5% contributed by the borrower as margin or net working capital. Worked backwards, this is where the popular shorthand "turnover should be about five times the CC limit" comes from. It is a byproduct of one specific method's assumptions, not an independent rule.

This is not a courtesy some banks choose to extend. Per RBI's guidelines on MSME lending, banks are required to apply at least the turnover method as a floor for aggregate fund-based working-capital limits up to ₹5 crore from the banking system. Above that threshold, banks have discretion to use the operating-cycle method, a more detailed MPBF-style assessment, cash budgeting (common for seasonal industries, construction and contractors), or their own internally developed model. Even below the ₹5 crore threshold, a bank can apply a more detailed method in addition to, or instead of, the turnover-method floor if its own policy calls for it.

Two things follow. First, the "5x turnover" idea applies, as at least a floor, mainly to smaller working-capital limits. It is not a universal law governing every CC sanction in India, and a large, seasonal or complex borrower is very likely to be assessed differently. Second, "projected" turnover means exactly that: a forward estimate the borrower puts forward and the bank tests for reasonableness against past performance, GST filings and industry norms. It is not a number to inflate optimistically to justify a bigger ask.

The operating-cycle method

Where the turnover method uses one aggregate percentage, the operating-cycle method builds the working-capital requirement from the actual mechanics of your cash cycle:

• Inventory-holding period: how many days, on average, raw material, work-in-progress and finished goods sit before sale.
• Receivable days: how many days, on average, customers take to pay after a sale or invoice.
• Creditor days: how many days you take to pay your own suppliers, which effectively finances part of your cycle for you.

Put together: Operating cycle (days) = Inventory days + Receivable days − Creditor days. Applying that cycle length to your average daily cost of sales (or purchases) gives an estimate of how much cash is tied up in the business at any point: your working-capital requirement. From there the bank works out net working capital, existing liabilities and the limit it is prepared to finance. The inventory turnover calculator and the receivables days calculator give you two of the three inputs from your own books before the bank does the arithmetic.

This method is more sensitive to how your business actually behaves. A business that collects from customers quickly and takes longer to pay its own suppliers has a shorter, cheaper cycle to finance than one that holds slow-moving stock and waits months to collect, even at identical annual turnover.

Net working capital, current assets, and current liabilities

Underneath both methods sits a simpler idea from the balance sheet: net working capital (NWC) = current assets − current liabilities. Current assets here mean stock, receivables and other short-term assets used in the operating cycle; current liabilities mean trade creditors and other short-term obligations. A bank wants to see the borrower contributing a reasonable share of NWC from owned funds or long-term sources, rather than the entire working-capital cycle being financed by short-term bank borrowing alone. That is one reason promoter contribution and existing debt matter in the assessment, not just turnover.

What the bank actually looks at, beyond the formula

Whichever method sets the starting number, a real assessment also weighs:

• GST turnover, audited sales and bank credit summation: the bank cross-checks projected turnover against what your GST returns, audited financials and actual bank credits already show, rather than taking a projection at face value.
• Existing debt obligations: other loans and limits you already carry reduce the room a bank has to extend further finance, and are netted against overall exposure limits.
• Profitability and debt relative to net worth: a business with thin or volatile margins, or high existing debt relative to net worth, is assessed more conservatively than a stronger peer at the same turnover.
• Promoter contribution: how much of the business's own funds (equity, retained earnings) is already invested in the working-capital cycle, versus how much is expected to come from the bank.
• A projected balance sheet and cash-flow statement, for larger or more complex limits, not just a single turnover figure, showing how current assets, current liabilities and net worth are expected to move over the sanction period.

Why a seasonal limit is not automatically "five times" anything

Round sanctioned numbers invite this kind of shorthand, so it is worth being direct: a seasonal processor's limit does not mean the bank mechanically applied a turnover multiple to arrive at it. A seasonal processor that buys the bulk of a year's raw material in a short window carries a very different, often much larger, peak stock position relative to its annual turnover than a fast-moving trading business does. That is exactly where an operating-cycle or seasonal cash-budget assessment, not a flat turnover ratio, tends to apply. The number in any single sanction letter reflects that business's cycle, security and risk profile, not a benchmark for what another business of similar size "should" get.

A side-by-side look at manufacturer, trader, and seasonal processor

The point of this table is not that one business type gets a "better" limit than another. It is that the right method, applied properly, produces a limit shaped like the business's actual cash needs, rather than a one-size number borrowed from a different kind of business.

Existing exposure and how it is netted against a new or renewed limit

A bank does not assess a CC request in isolation from everything else you owe. Other working-capital limits at different banks, term loans, unsecured loans, and any group or associate-concern exposure the bank knows about are typically factored into the overall risk view. Regulatory exposure norms constrain how much any single bank (or the banking system) can lend to one borrower group, and a business's real debt-servicing capacity depends on its total obligations, not just the facility under discussion. So a business that takes on a meaningful amount of unsecured loans alongside an existing CC limit should expect that fact to surface, directly or indirectly, at the next renewal: not as a penalty in itself, but as a real input into how much additional risk the bank is comfortable carrying.

Seasonal industries and cash budgeting

Businesses with a strongly seasonal cycle (rice mills and other agri-processors buying a year's raw material in a harvest window, construction contractors with lumpy billing, exporters with seasonal shipment cycles) often don't fit a flat annual turnover or operating-cycle average, because their peak requirement in season can be many times their trough requirement out of season. For these, banks commonly use cash budgeting: a month-by-month (or quarter-by-quarter) projection of cash inflows and outflows, sizing the limit to the peak deficit period rather than to an annualised average. This is one reason a seasonal business's sanctioned limit can look large relative to its average monthly turnover: it is sized to the peak, not the average, by design. Of the methods in this guide, it is the only one that looks like a year at our mill.

Illustrative examples

These are round, illustrative numbers only, showing how the same broad approach produces different-looking outcomes for different business shapes.

A trading business with ₹4 crore projected annual turnover, financed under the turnover-method floor: roughly 25% of turnover (₹1 crore) as working-capital requirement, with the bank financing about 20% of turnover (₹80 lakh) and the borrower contributing the remaining 5% (₹20 lakh) as margin — landing near an ₹80 lakh CC limit.

A manufacturer with the same ₹4 crore turnover but a longer operating cycle (say, 60 days of inventory plus 45 days of receivables against 20 days of creditor financing, an 85-day net cycle) assessed under the operating-cycle method could show a meaningfully higher working-capital requirement than the flat 25%-of-turnover figure, because its cash is tied up longer.

A seasonal rice mill buying most of its annual paddy requirement in a two-to-three month window, with a modest average monthly turnover but a very high peak stock position during and just after procurement, is a natural cash-budgeting case. Its sanctioned limit is sized to fund that peak stock position, which can look large relative to its average monthly sales precisely because the business is not evenly spread across the year.

To run your own version of the first two examples, the working capital calculator turns your inventory, receivable and payable days into a cash-cycle figure.