One of the most frustrating situations for a business owner is looking at a profitable income statement and then looking at a bank account that seems to be telling a completely different story.
Revenue is growing. The company is profitable. Nothing unusual jumps out in expenses. Yet cash isn’t accumulating the way you expected—or worse, the bank balance is declining.
So where did the money go?
In many growing businesses, the answer is working capital. The cash hasn’t necessarily disappeared or been spent on excessive overhead. It may be sitting in accounts receivable waiting to be collected, tied up in inventory waiting to be sold, or consumed because the company is paying suppliers faster than customers are paying the company.
This is one of the most important financial concepts for a growing business owner to understand. Profit tells you whether the business is making money. Working capital helps explain where some of that money has gone.
What Working Capital Really Means
The traditional accounting definition of working capital is current assets minus current liabilities. That’s technically correct, but it isn’t necessarily the most useful way for an owner to think about it.
Understanding working capital is one example of how a CFO thinks about cash flow, looking beyond the current bank balance to identify future liquidity risks.
When looking at working capital from a cash-flow perspective, one should be primarily interested in three things: accounts receivable, inventory and accounts payable.
Accounts receivable represents money customers owe you. Inventory represents money you’ve already invested in products or materials that haven’t yet turned back into cash. Accounts payable represents money you owe suppliers and, in effect, the amount of short-term financing those suppliers are providing to the business.
The relationship between those three can have an enormous impact on cash.
Consider a company that earns $1 million this year. During that same period, accounts receivable increases by $500,000 and inventory increases by $400,000, while accounts payable increases by only $100,000.
The business generated $1 million of accounting profit, but approximately $800,000 of additional cash was absorbed by working capital.
And that’s before considering equipment purchases, debt principal payments, taxes or owner distributions.
This is why profitable companies can run out of cash even when the income statement appears healthy.
Why Growth Can Make Cash Flow Worse Before It Gets Better
Business owners naturally expect higher revenue to produce more cash. Over time, it should. But growing from $10 million to $15 million in sales may require a significant cash investment before the company collects the additional revenue.
You may need more inventory to support the sales. You may hire employees before the revenue arrives. Suppliers may need to be paid in 30 days while customers pay you in 45 or 60 days. You might also need more equipment, vehicles or warehouse capacity.
All of that requires cash.
This creates a situation that surprises many owners: the company can be growing rapidly, generating higher profits and simultaneously experiencing greater pressure on its bank account.
That’s why I don’t consider growth inherently good or bad from a cash perspective. I want to know how much cash the growth will require and when that cash will come back.
Your Customers May Be Holding More of Your Cash Than You Realize
Accounts receivable is one of the first places I look when a profitable business is struggling to generate cash.
Suppose a company generates $12 million of annual credit sales, or approximately $1 million per month. If customers pay in roughly 30 days, the company may have about $1 million tied up in receivables at any given time.
Now suppose collection time increases from 30 days to 45 days. The income statement may look perfectly normal, but the company could now have approximately another $500,000 tied up in accounts receivable.
That money belongs to the business. It simply hasn’t reached the bank yet.
This is why Days Sales Outstanding (DSO) is such a useful metric. DSO estimates how long it takes customers to pay. The exact number matters, but the trend matters even more.
If DSO moves from 32 days to 36, then 41 and eventually 47, I want to know why. Customers may be paying more slowly, invoicing may be delayed, collections may have become inconsistent, payment terms may be too generous, or the company’s customer mix may have changed.
The next step is to translate those days into dollars.
For a company with $36.5 million of annual credit sales, average daily sales are approximately $100,000. Every additional day of receivables therefore represents roughly $100,000 of cash.
Improving DSO from 45 days to 40 days could potentially release approximately $500,000 of cash.
The company didn’t have to make another sale to generate it. It simply collected money it had already earned faster.
Inventory Can Quietly Consume Millions of Dollars
Inventory creates the same problem in a different way.
Every dollar of inventory began as cash. The company used that cash to buy a product or material and now has to wait for the inventory to be sold—and possibly wait again for the customer to pay—before the cash completes its trip back to the bank.
If inventory grows from $4 million to $5 million, the company has approximately another $1 million tied up in inventory.
That may be completely appropriate. Perhaps the company is preparing for significant growth, supplier lead times have increased, or management made an attractive bulk purchase.
But inventory also grows because forecasting is poor, purchasing isn’t connected closely enough to demand, slow-moving products accumulate, locations carry excessive safety stock, or obsolete inventory isn’t dealt with quickly enough.
The objective shouldn’t be to carry the least inventory possible. It should be to have the right inventory available without unnecessarily tying up cash.
Days Inventory Outstanding, or DIO, can help quantify this. If a company has $18.25 million of annual cost of goods sold, it uses approximately $50,000 of inventory per day. Reducing inventory from 80 days to 70 days could therefore release roughly $500,000 of cash, assuming the reduction can be made without creating stockouts or hurting customer service.
Again, no additional revenue is required.
Don’t Forget About the Other Side: Accounts Payable
Accounts payable works in the opposite direction. When a supplier gives you 30 days to pay an invoice, that supplier is effectively financing the purchase for those 30 days.
That doesn’t mean a business should intentionally pay vendors late. Damaging supplier relationships to preserve cash is not a working-capital strategy.
But paying invoices significantly earlier than required doesn’t necessarily make sense either.
Suppose a company purchases $12 million annually from suppliers, or approximately $32,900 per day. If the business is routinely paying in 20 days even though its vendors provide 30-day terms, consistently using the full negotiated terms could preserve approximately $329,000 of cash.
There are exceptions. An early-payment discount may provide a return that makes paying early worthwhile. A critical supplier relationship may justify different treatment. The point is that payment timing should be an intentional financial decision rather than simply whatever happens to occur in accounts payable.
The Cash Conversion Cycle Ties It Together
Accounts receivable, inventory and accounts payable become much more useful when you look at them together.
A common measurement is the cash conversion cycle:
Days Inventory Outstanding + Days Sales Outstanding – Days Payable Outstanding
Assume a business carries 60 days of inventory, collects customers in 40 days and pays suppliers in 30 days. Its cash conversion cycle is 70 days.
Now suppose management improves inventory from 60 days to 52, receivables from 40 days to 35, and negotiates supplier terms that move payables from 30 days to 35.
The cash conversion cycle falls from 70 days to 52 days.
An 18-day improvement may not sound dramatic until you calculate how many dollars of company capital those 18 days represent.
That’s the part of working-capital analysis I find most useful. Don’t simply tell management that DSO is 45 days. Tell them what a five-day improvement is worth in cash.
How Much Cash Could Be Trapped in Your Business?
Consider a company with $30 million of annual revenue and $18 million of annual cost of goods sold. It currently collects customers in 45 days, carries approximately 70 days of inventory and pays suppliers in 30 days.
Management believes it can realistically reduce DSO by five days, reduce inventory by ten days and extend payment timing by five days within existing vendor terms.
The receivable improvement could release approximately $411,000. The inventory improvement could release another $493,000, and better utilization of supplier terms could preserve approximately $247,000.
Together, those improvements represent approximately $1.15 million of potential additional liquidity.
That’s why working capital deserves management attention. The company doesn’t necessarily need to borrow another $1 million or generate millions of dollars of additional sales. Sometimes a meaningful amount of cash is already inside the business and simply isn’t being managed efficiently.
Don’t Optimize Working Capital Blindly
There is a danger in turning working-capital improvement into a contest to make every metric as low—or as high—as possible.
Reducing receivables isn’t helpful if the only way to accomplish it is eliminating payment terms that your best customers require. Reducing inventory isn’t helpful if it creates stockouts and lost sales. Stretching accounts payable isn’t helpful if it damages important supplier relationships or causes you to lose valuable discounts.
The objective is not minimum working capital.
It is the right amount of working capital for the business.
That distinction matters because working-capital decisions are ultimately operating decisions. Finance can quantify the opportunity, but management still has to consider customers, suppliers, inventory availability and the long-term economics of the decision.
Your Income Statement May Not Show the Problem
One reason working-capital problems can persist is that many owners spend most of their financial-review time on the income statement.
Revenue increased 20%. Gross profit increased. Operating income increased. Net income increased.
Everything looks positive.
But the balance sheet may simultaneously show receivables increasing 35%, inventory increasing 40%, and cash declining.
Those aren’t separate stories. They’re different parts of the same story.
This is also why financial statements become more valuable when they are used together rather than reviewed as isolated accounting reports.
Working Capital Problems Are Often Operational Problems
The numbers can also tell you where to look operationally.
If DSO is increasing, perhaps collections aren’t the real problem. Maybe invoices aren’t going out quickly enough, customer disputes aren’t being resolved, or the sales team is negotiating payment terms without understanding their financial impact.
If inventory days are climbing, the underlying issue might be forecasting, purchasing, obsolete products, poor inventory controls or too much safety stock spread across multiple locations.
If supplier terms are deteriorating, that could point toward purchasing practices, vendor concerns or weak negotiation.
Working capital isn’t just a finance issue. It often reveals problems in the way the business operates.
Growth Forecasts Need to Include Working Capital
This becomes especially important when management builds a budget or forecast.
Suppose a $20 million company plans to grow to $30 million next year. The forecast shows a substantial increase in profit, so management assumes cash will also increase substantially.
But what happens to accounts receivable when revenue grows 50%? How much additional inventory will be needed? When will suppliers have to be paid? Will new employees be hired before the additional revenue arrives?
If the forecast captures the additional profit but ignores the cash required to fund the growth, management can dramatically overestimate future liquidity.
That is the difference between a budget that predicts earnings and a financial forecast that actually helps management run the business.
Working Capital Belongs on the Management Dashboard
For a company with meaningful working-capital requirements, I would not wait until the end of the year to analyze these numbers.
DSO, inventory days, payable days and the cash conversion cycle can all be useful management KPIs. Depending on the business, I may also want to see past-due receivables, inventory aging, slow-moving inventory and working capital as a percentage of revenue.
You don’t need a dashboard with dozens of financial metrics. You need the handful of numbers that explain where cash is going and alert management when something is moving in the wrong direction.
The same applies to cash forecasting. A 13-week cash flow forecast can identify upcoming cash pressure while management still has time to improve collections, adjust purchasing, manage payment timing or arrange financing.
Waiting until the bank balance becomes uncomfortable eliminates many of those options.
How Working Capital Affects the Cash You Should Keep in the Bank
Working capital also influences the amount of cash a company should maintain.
A business that collects customers immediately, carries little inventory and has flexible operating expenses may be able to operate comfortably with a relatively modest cash reserve.
A company carrying significant inventory, waiting 60 days for customers to pay and supporting substantial fixed overhead has a very different risk profile.
This is why I don’t like applying a generic rule such as three or six months of expenses to every company. The right reserve depends on how the business actually generates and consumes cash.
When Working Capital Becomes a CFO Issue
Calculating DSO or inventory days isn’t particularly difficult. The more important work begins after you have the number.
Why did DSO increase? Which customers caused it? How much cash would a five-day improvement release? How much inventory can we reduce without hurting sales? Are we using vendor terms effectively? How much additional working capital will next year’s growth require? Can we fund that growth internally, or will we need additional financing?
Those questions connect finance directly to management decisions.
The Bottom Line
When a profitable company continually feels short on cash, don’t assume the problem is excessive spending.
Look at the balance sheet.
Your customers may be holding more of your cash because they’re paying more slowly. You may have accumulated more inventory than the business needs. You may be paying suppliers faster than necessary. Or growth may simply be requiring far more working capital than management anticipated.
Measure the days, but then translate those days into dollars. That’s when the analysis becomes useful.
A five-day improvement in collections, a ten-day reduction in inventory, or better use of supplier terms can sometimes release hundreds of thousands—or millions—of dollars without adding a single dollar of revenue.
Sometimes the fastest way to improve cash flow isn’t to make more money.
It’s to get the cash you’ve already earned back into the bank faster.