Why does growth need more cash than it produces?

A company grows 60% in a year, is profitable on paper in every month of it, and ends the year with less cash than it started. Nobody stole anything and no cost was hidden. The money went into working capital.

This is one of the least intuitive things about running a business, and one of the most common causes of a company failing while it is growing. It catches services firms, product companies and anyone holding inventory, and the arithmetic behind it takes about twenty minutes to work out for your own business.

What the cycle actually is

Working capital is the cash tied up in the ordinary operating cycle, and it has three components.

• ·Receivable days: how long customers take to pay after you invoice them.
• ·Inventory days, where you hold stock: how long goods sit before they are sold.
• ·Payable days: how long you take to pay your own suppliers, which works in your favour.

Put together, they give the cash conversion cycle: the number of days between your money going out and your money coming back.

One detail in the arithmetic matters more than it looks. The usual shorthand converts all three into days of revenue and nets them off, which is quick and flattering. Receivables genuinely scale with revenue, because that is what you invoice. Stock and payables scale with what you spend, which is a smaller number, so counting them on revenue credits you with more supplier funding than you actually have.

So the honest version puts receivables on revenue a day, and inventory and payables on cost of sales a day. On the figures below, the shorthand said ₹48 lakh was tied up when the real answer was ₹71 lakh. That is not a rounding difference, and it is always in the same direction: the shortcut makes the problem look smaller than it is.

An illustrative company with ₹40 lakh of monthly revenue and ₹18 lakh of monthly cost of sales, collecting in 65 days and paying suppliers in 30, has ₹86.7 lakh in receivables against ₹18 lakh of payables. Net, ₹68.7 lakh of its own cash is inside the cycle, which is a little over 51 days of revenue.

Why growth makes it worse

Here is the part that surprises people. The cycle does not just sit there at a fixed rupee amount. It scales with revenue.

Take the company above. At ₹40 lakh a month it has ₹68.7 lakh inside the cycle. Grow it to ₹60 lakh a month, with cost of sales rising in step to ₹27 lakh and not a single day of improvement in how anyone pays, and the cycle now holds ₹1.03 crore. The extra ₹34.3 lakh has to come from somewhere, and it leaves the bank before the additional profit from the growth has arrived.

So growth consumes cash in proportion to how fast you grow and how long your cycle is. A business with a 20-day cycle can grow quickly on its own cash. A business with a 90-day cycle cannot, however profitable it is.

Profit tells you whether the business works. The cash conversion cycle tells you how fast it can grow without running out of money.

A worked example

Illustrative figures for a fictional B2B company. Revenue ₹40 lakh a month, growing to ₹64 lakh over twelve months. Contribution margin 55%, fixed costs ₹18 lakh a month rising to ₹24 lakh. Receivable days 68, payable days 32, no inventory.

On the profit line the year looks good. Monthly contribution rises from ₹22 lakh to ₹35 lakh while fixed costs rise by ₹6 lakh, so the business ends the year meaningfully more profitable than it started, and the year as a whole produces roughly ₹65 lakh of accounting profit.

On the cash line it is different. Receivables start at ₹90.7 lakh against ₹19.2 lakh of payables, so ₹71.5 lakh sits inside the cycle, which is about 54 days of revenue. By the end of the year, with revenue at ₹64 lakh and cost of sales at ₹28.8 lakh, receivables are ₹1.45 crore against ₹30.7 lakh of payables, so the cycle holds ₹1.14 crore.

That is ₹42.9 lakh of the year's profit that never became cash. It became receivables. The company ends the year with roughly ₹22 lakh more in the bank, having earned about ₹65 lakh, and a founder who planned on the profit figure is ₹43 lakh short.

Now change one input. Bring collection days from 68 to 45 over the year, and the cycle at year end holds ₹65.3 lakh rather than ₹1.14 crore. That is ₹6 lakh less than it held at the start, on revenue 60% higher. Working capital has stopped consuming cash and started releasing it, and the year converts more than its full profit into the bank.

The two versions of that year differ by ₹49 lakh, and the only thing that changed was how quickly customers paid. No price rose, no cost fell, and nobody raised anything.

How much cash your growth needs

There is a simple way to size it before committing to a plan.

1. 01Work out what is actually inside your cycle from the last quarter's actuals: receivables plus stock less payables, in rupees, not from the payment terms you agreed.
2. 02Divide that by revenue a day to get the cycle in days, then by 30 to get it in months of revenue.
3. 03Multiply that by the monthly revenue increase you are planning over the year.
4. 04The result is roughly how much additional cash the growth will absorb, before any spending on the growth itself.

For the example above: 54 days is 1.79 months, and monthly revenue is rising by ₹24 lakh, so the growth absorbs about ₹42.9 lakh. That reconciles exactly with the detailed figure, and it takes a minute rather than a model.

The cash conversion cycle calculator on this site runs both steps, including what a shorter collection cycle would be worth against the same plan.

Do this before the annual plan is signed off, not after. It is a common reason a plan that looked affordable in March needs a bridge in November.

Where the money is actually sitting

Working capital is an abstraction until you look at where the cash has gone, which is usually three specific places.

• ·Receivables: invoices raised and not yet collected. Visible in the ageing report, and the part most companies at least know about.
• ·Unbilled work: delivered, earned, and never invoiced. It does not appear in the ageing report because no invoice exists, which is why it is the most overlooked and the fastest to fix.
• ·Inventory or prepayments: stock bought ahead of demand, annual software paid up front, deposits with landlords and platforms. Real cash, sitting still.

Against those sits the money you are holding: supplier invoices not yet paid, and statutory dues collected and not yet deposited. That second one deserves care. GST collected, TDS deducted and the employee share of provident fund all sit in your bank account for a few weeks and none of it is yours. A company that treats those balances as working capital is funding itself with other people's money and will find out the hard way.

A useful exercise, once a quarter, is to list the actual rupee amount in each of these five places on one page. Most founders have never seen them together, and the total is usually larger than the cash balance they worry about.

The businesses where this bites hardest

• ·Services firms selling to large corporates, where 60 to 90 day payment is normal and the delivery cost, mostly salaries, is paid weekly. The gap between paying the team and being paid is the entire problem.
• ·Anyone holding physical inventory, where cash goes out at purchase and comes back only after the sale and then after collection. Growth here needs stock bought in advance for demand that has not arrived.
• ·Companies selling to government or public sector buyers, where payment cycles are long and largely outside your control.
• ·Marketplaces and aggregator-dependent businesses, where the platform collects from the customer immediately and settles with you on its own schedule.

And the businesses where it barely matters: subscription software billed in advance, and retail or food service where customers pay at the point of sale. Both can have a negative cycle, collecting before they pay their suppliers, which means growth generates cash rather than consuming it. If you are in one of those, this article is about why your peers in other sectors seem to struggle with growth you find easy.

Shortening the cycle

Three levers, in order of how quickly they work.

Receivables first, because it is usually the largest component and entirely within your control. Invoice on delivery rather than at month end, fix the disputes that hold invoices up, call your five largest debtors, and escalate on a schedule rather than when someone remembers. Ten to fifteen days is realistic within a quarter for most firms that have never worked at it.

Then the terms themselves. New contracts can carry advance or milestone billing, and annual prepayment at renewal moves a year of cash forward at once. Existing contracts are harder, but a standing discount for early payment, priced properly, is cheaper than most alternatives.

Then payables, carefully. Taking longer to pay suppliers does improve your cycle, and it has limits that are both commercial and legal. Under the MSMED Act, payments to registered micro and small suppliers must be made within the agreed period or 45 days at most, with interest at three times the bank rate on delays, and from FY 2026-27 the deduction for such expenses moves to the year of actual payment. Stretching small suppliers is not a working capital strategy.

Inventory, where it applies, is a separate discipline: ordering more often in smaller quantities, identifying the slow-moving items that absorb cash indefinitely, and being honest about which stock is never going to sell.

Why the balance sheet is where this lives

Founders read the P&L every month and the balance sheet almost never. That is why working capital surprises are surprises: the whole story is on the page nobody opens.

Three lines on the balance sheet carry it. Trade receivables, which should be compared against monthly revenue rather than read as an absolute number. Inventory, where it exists. Trade payables, which is what you are being funded by. Watching those three as a ratio to revenue, month by month, shows the cycle lengthening long before it shows up as a cash problem.

A simple habit closes most of the gap: alongside the monthly P&L, report receivable days, payable days and the cash conversion cycle as three numbers with the previous three months beside them. When the cycle moves by five days, someone notices in the month it happened rather than in the quarter it hurts.

What to check before a growth plan

1. 01Calculate the current cycle from actuals. Most companies find it is longer than their stated payment terms by a wide margin.
2. 02Size the working capital the plan needs, using the four-step method above.
3. 03Set that against the cash you will have after funding the operating loss, if any. Both draw on the same balance.
4. 04Ask whether the cycle can be shortened before the growth arrives. It is far easier to fix collections at ₹40 lakh a month than at ₹64 lakh.
5. 05Decide whether the growth rate in the plan is one the balance sheet can actually fund, and be willing to change the plan rather than discover the answer in month nine.

The honest version of the trade-off

There is a point worth stating plainly, because it runs against the instinct of most founders. Growing more slowly is sometimes the better decision, and it is almost never the one that gets considered.

A company that grows 40% while converting its profit into cash is in a stronger position than one that grows 70% and has to raise on unattractive terms to fund the receivables. The second is more impressive in a pitch and more fragile in practice.

The choice only exists if someone does the arithmetic in advance. Founders who work out what their growth costs in working capital usually find one of two things: that the plan is affordable and the year can proceed with confidence, or that fixing collections first buys most of what a funding round would have. Either answer is worth the twenty minutes.

About Simplify

Simplify is a finance clarity and investment readiness practice working with founders across India, built on six years inside startups. We write about the questions founders bring before a decision, not after it.