Quick answer: A B2B company needs enough working capital to cover its operating costs for the length of its cash conversion cycle, the number of days between paying for materials and labor and collecting from customers, plus a cushion of 10% to 20%. As a quick health check, most B2B companies aim for a working capital ratio between 1.2 and 2.0.
Ask ten business owners how much working capital they need and you will probably hear “more” ten times. It is a fair answer. In B2B, you often pay your people and suppliers weeks before your customers pay you, and that gap has to be funded by something.
The better answer is a number you can calculate. Here is how to find yours, what pushes it up or down, and what to do when you come up short.
What Is Working Capital?
Working capital is the money available to run your business day to day. It equals your current assets minus your current liabilities.
Current assets include cash, accounts receivable, and inventory. Current liabilities include accounts payable, short-term debt, accrued payroll, and taxes due within a year.
One thing to keep in mind: a healthy working capital number on paper does not guarantee cash in the bank. If most of your current assets are unpaid invoices, you can look strong on the balance sheet and still struggle to make payroll.
“A healthy working capital number on paper does not guarantee cash in the bank.”
How Do You Calculate How Much Working Capital You Need?
The most practical way is to multiply your daily operating costs by your cash conversion cycle, then add a cushion. Your cash conversion cycle (CCC) is how many days your cash is tied up before it comes back to you.
- DSO (days sales outstanding): How long customers take to pay you.
- DIO (days inventory outstanding): How long inventory sits before it sells. Service businesses can use zero.
- DPO (days payable outstanding): How long you take to pay your suppliers.
Then run the numbers:
The 1.15 adds a 15% cushion for slow payers and surprises. Adjust it between 10% and 20% depending on how predictable your business is.
A Worked Example
Say you run a distribution company with $6 million in annual revenue and $4.8 million in annual operating costs, or about $13,150 a day.
| Measure | Days |
| Customers pay in (DSO) | 50 |
| Inventory sits for (DIO) | 40 |
| You pay suppliers in (DPO) | 30 |
| Cash conversion cycle | 60 |
Sixty days multiplied by $13,150 is about $790,000. With a 15% cushion, this company should plan for roughly $900,000 in working capital to run comfortably. Try it with your own numbers using our business calculators.
What Is a Good Working Capital Ratio for a B2B Company?
A working capital ratio between 1.2 and 2.0 is generally considered healthy for most B2B companies. The ratio divides current assets by current liabilities, so it shows how many dollars of short-term assets you have for every dollar you owe in the next year.
| Working capital ratio | What it usually signals |
| Below 1.0 | Short-term bills exceed short-term assets. Cash pressure is likely. |
| 1.0 to 1.2 | Tight. One slow-paying customer can cause a crunch. |
| 1.2 to 2.0 | Healthy range for most B2B companies. |
| Above 2.0 | Comfortable, but cash may be sitting idle in receivables or inventory. |
Treat the ratio as a quick check, not the whole story. A 1.8 ratio built mostly on 90-day receivables is weaker than a 1.4 ratio built on cash.
What Increases a B2B Company’s Working Capital Needs?
Your working capital needs rise whenever cash goes out faster or comes back slower. The most common drivers are:
- Longer customer payment terms. Moving customers from Net 30 to Net 60 adds roughly a month of sales to your receivables. Our guide to Net 30, Net 60, and Net 90 payment terms walks through the math.
- Slow-paying customers. Your terms say 30 days, but your DSO says 45. The real number is the one that counts.
- Seasonality. Many distributors and manufacturers build inventory months before their busy season.
- Customer concentration. If one large customer pays late, a big share of your cash is stuck at once.
- Shorter supplier terms. Suppliers asking for faster payment shrinks your DPO and lengthens your cycle.
“Plenty of profitable companies run into cash trouble during their best year.”
The Growth Trap
Growth is the driver that catches owners off guard. More sales means more payroll, materials, and receivables before the new revenue arrives.
In our example, if that distributor grows 25% with the same 60-day cycle, its working capital need jumps by nearly $200,000. Plenty of profitable companies run into cash trouble during their best year, simply because they could not fund the growth.
How Can a B2B Company Close a Working Capital Gap?
You can close a working capital gap by shortening your cash conversion cycle, adding outside funding, or both. Start with the operational fixes, since they cost little.
- Invoice faster and follow up sooner. Send invoices the day work is delivered and check in before the due date.
- Negotiate supplier terms. Even moving from Net 30 to Net 45 with key vendors frees up cash.
- Tighten inventory. Slow-moving stock is cash sitting on a shelf.
- Use a bank line of credit if you qualify. It is flexible, but approval depends on your financials, collateral, and credit history.
- Use invoice factoring. You sell unpaid invoices and receive most of their value, often within 24 to 48 hours. Funding grows as your sales grow, which makes it a strong fit for the growth trap.
Factoring turns the receivables already on your balance sheet into cash, without adding debt. Learn more about how invoice factoring works or see our factoring rates.
Frequently Asked Questions
Can a Company Have Too Much Working Capital?
Yes. A very high working capital ratio can mean cash is tied up in slow receivables or excess inventory instead of being used to grow the business.
Is Negative Working Capital Always Bad?
Not always, but for most B2B companies it is a warning sign. It means short-term obligations exceed short-term assets, so you may struggle to pay bills on time.
How Often Should I Review My Working Capital?
Review it at least monthly, and more often during rapid growth, seasonal swings, or when a large customer changes its payment habits.
Does Invoice Factoring Improve Working Capital?
Yes. Factoring converts accounts receivable into cash quickly, which shortens your cash conversion cycle and gives you money to cover payroll, suppliers, and growth without taking on new debt.
The Bottom Line
The right amount of working capital is not a guess. Multiply your daily operating costs by your cash conversion cycle, add a cushion, and revisit the number as your business grows or your customers’ payment habits change.
If the math shows a gap, you are not alone, and you have options. Universal Funding helps B2B companies turn unpaid invoices into working capital, often within 24 hours, so you can take on new orders without worrying about the next payroll.
Want to find out how much working capital your receivables could unlock?
Contact Universal Funding or call 800.405.6035 to talk with a funding specialist today.
