Working capital is quoted as a ratio and managed, if at all, as a number on a balance sheet.
The more useful version is a count of days: how long your own money is tied up between paying a supplier and being paid by a customer. Every day removed from that count is cash you did not have to borrow.
This covers the calculation, a worked example, the cash conversion cycle and how to measure it, the levers that genuinely improve it, the finance options that bridge it, and how to set a target you can manage to.
Working capital is the difference between a business's current assets and current liabilities. It measures short-term financial health and operational efficiency. Positive working capital means you can meet near-term obligations; negative working capital is a liquidity warning.
Working Capital Formula
Working Capital = Current Assets - Current Liabilities
Current assets include: cash, accounts receivable, inventory, and prepaid expenses. Current liabilities include: accounts payable, accrued liabilities, and short-term debt due within 12 months.
The cash conversion cycle is the number to manage, not the ratio. It tells you how many days your own money is tied up between paying for something and being paid for it, and every day you remove is cash you do not have to borrow.
Abhinav Gupta, CPA, CA, MBA · LinkedInWorking Capital Example
| Item | Amount ($) |
|---|---|
| Cash | 50,000 |
| Accounts Receivable | 80,000 |
| Inventory | 40,000 |
| Prepaid Expenses | 8,000 |
| Total Current Assets | 178,000 |
| Accounts Payable | (55,000) |
| Accrued Liabilities | (20,000) |
| Short-Term Debt | (15,000) |
| Total Current Liabilities | (90,000) |
| Working Capital | 88,000 |
| Current Ratio | 1.98x |
The Cash Conversion Cycle (CCC)
CCC = DIO + DSO - DPO. This measures how long cash is tied up in the operating cycle before it returns as cash.
| Component | Formula |
|---|---|
| DIO (Days Inventory Outstanding) | (Average Inventory / COGS) x 365 |
| DSO (Days Sales Outstanding) | (Average AR / Revenue) x 365 |
| DPO (Days Payable Outstanding) | (Average AP / COGS) x 365 |
| Cash Conversion Cycle | DIO + DSO - DPO |
A lower CCC is better. Amazon famously operates with a negative CCC, customers pay before Amazon pays its suppliers, meaning suppliers finance Amazon's growth.
How to Improve Working Capital
Shorten DSO (Collect AR Faster)
- Invoice immediately upon delivery, not at month-end
- Offer early payment discounts (1-2% for payment within 10 days)
- Automate payment reminders at day 7, 14, and 21 past due
- Use online payment links to remove friction from the payment process
- Review and tighten credit terms for slow-paying customers
Increase DPO (Extend AP Terms)
- Negotiate 45-60 day terms with key vendors
- Pay on the last day terms allow, not before
- Use purchasing cards (p-cards) to extend effective terms with card float
Reduce DIO (Lower Inventory)
- Implement min-max reorder points based on actual demand data
- Reduce safety stock for fast-moving, reliable-supply items
- Liquidate slow-moving or obsolete inventory (even at a discount)
Working Capital Finance Options
| Option | How It Works |
|---|---|
| Invoice Factoring | Sell AR at a discount (70-90%) for immediate cash. Expensive but fast. |
| Revolving Line of Credit | Draw and repay as needed. Interest only on the balance drawn. Best for temporary gaps. |
| Inventory Financing | Loan secured by inventory. Useful for seasonal businesses building stock. |
| Supply Chain Financing | Buyer approves invoices early; supplier receives early payment from a financier at a small discount. |
Setting a Target You Can Actually Manage To
The measure is only useful once it turns into something somebody owns. A figure reported each month and discussed by nobody changes nothing, and the usual reason is that the headline number is too far from anyone's daily work to be actionable.
Breaking it into its three parts fixes that, because each part has an obvious owner. How long customers take to pay belongs to whoever runs billing and collections. How long stock sits belongs to whoever buys and whoever sells. How long you take to pay suppliers belongs to whoever runs the payment runs. Each is measurable in days, each moves independently, and each responds to decisions someone can take this week.
Set the target in days rather than in currency, because a money figure moves with the size of the business and days do not. A target expressed as days also survives growth: if the business doubles and the days hold, working capital has scaled exactly as it should, which is the outcome you wanted and would not have seen in the absolute number.
- Set a target for each of the three components separately, and give each one a named owner
- Measure in days, and read the three alongside each other, since an improvement in one bought by worsening another is not an improvement
- Review it monthly with the people who can move it, not only with finance
- Recheck the target after any change in payment terms, on either side, because the old target was set against the old terms
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Frequently Asked Questions
What working capital ratio is healthy?
A current ratio (current assets / current liabilities) of 1.5-2.5 is generally healthy for most businesses. Industry varies significantly, retail can run below 1.5 due to fast inventory turns.
Can a business have too much working capital?
Yes. Excess working capital, especially large idle cash balances or excess inventory, represents capital that could be deployed for growth, debt repayment, or returned to owners.
What is negative working capital?
When current liabilities exceed current assets. This is a serious warning sign for most businesses, but some retailers and subscription businesses with deferred revenue intentionally operate with negative working capital because cash comes in before costs go out.
Which lever is worth pulling first when it needs improving?
Collections, in almost every case, because it is entirely within your control and costs nobody else anything. Extending supplier payment terms shifts the problem onto your suppliers and eventually shows up in pricing or in goodwill. Reducing stock helps but takes a buying cycle to take effect. Getting paid on the terms you already agreed is immediate, and it is money you are owed.
Is growth itself a working capital problem?
Frequently, and it catches out businesses that are doing everything right. Growing means buying stock and paying people before customers pay you, so the faster you grow the more cash is tied up in the gap. A profitable business can run out of cash purely by growing quickly, which is why a growth plan needs a funding plan attached to it rather than an assumption that profit will cover it.
Written by
Abhinav Gupta, CPA, CA, MBA
Abhinav works with business owners across the US on industry-specific bookkeeping, from dental practices and restaurants to construction and e-commerce. He writes about what each trade's books actually need. Connect on LinkedIn
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