Cash flow & planningWorking Capital Management for Small Business: Where Your Cash Gets Stuck

Follow one dollar through a typical small business. On Monday it leaves your account to buy materials. It sits in a storeroom for six weeks. It gets turned into a finished job, then an invoice, then an invoice with a polite reminder. Somewhere around day 80, it finally comes home, tired and a little sunburned.

Multiply that trip by every dollar you spend and you have the reason a busy, profitable company can feel broke. The money still exists. It's out traveling.

Working capital management is the unglamorous job of shortening that trip. This article shows where cash gets stuck, how to measure the delay in days, and which levers usually free up the most money without a loan.

What working capital actually means

Working capital is current assets minus current liabilities. Current assets are things that turn into cash within a year (cash itself, receivables, inventory, prepaid expenses). Current liabilities are things you'll pay within a year (supplier bills, credit cards, accrued payroll, the next 12 months of loan payments).

For working capital in a small business, the three lines that move the most are usually these:

• Accounts receivable: work you've billed but haven't collected.
• Inventory: goods or materials you've paid for but haven't sold.
• Accounts payable: bills you owe but haven't paid yet.

The first two hold your cash hostage. The third one is a supplier holding theirs for you, which is perfectly fine as long as you pay on the terms you agreed to.

The cash conversion cycle, in days

The cash conversion cycle measures how long a dollar is away. It has three parts:

1. Days sales outstanding (DSO): accounts receivable divided by annual revenue, times 365. Roughly how long customers take to pay.
2. Days inventory outstanding (DIO): inventory divided by annual cost of goods sold, times 365. How long stock sits before it sells. Cost of goods sold (COGS) is the direct cost of what you sold.
3. Days payables outstanding (DPO): accounts payable divided by annual COGS, times 365. How long you take to pay suppliers.

Cash conversion cycle = DSO + DIO minus DPO.

Service businesses without inventory skip the middle step, which makes the math shorter and the receivables problem louder.

A worked example with real-looking numbers

Take a hypothetical wholesale distributor of restaurant supplies. Annual revenue is $2.4 million, COGS is $1.5 million, and the year-end balance sheet shows:

• Accounts receivable: $300,000
• Inventory: $250,000
• Accounts payable: $125,000

The math:

• DSO: $300,000 / $2,400,000 x 365 = about 46 days
• DIO: $250,000 / $1,500,000 x 365 = about 61 days
• DPO: $125,000 / $1,500,000 x 365 = about 30 days
• Cash conversion cycle: 46 + 61 minus 30 = 77 days

So every dollar this company spends on stock is gone for about 11 weeks. Now the part owners like. Each day of receivables is worth about $6,575 of cash ($2.4 million divided by 365). If the company brings DSO from 46 days down to 36, roughly $65,000 lands in the bank and stays there. Cut 15 days of inventory, and about $61,000 more stops sitting on shelves.

That's about $126,000 of cash freed up without selling a single extra case of napkins. And nobody had to call the bank.

Where cash gets stuck (and how to pry it loose)

Receivables. This is the most common hiding spot. Invoices go out late, terms are loose, and nobody owns follow-up. Small fixes add up: invoice the day the work is done, offer electronic payment, and run an aging report every week. Our piece on accounts receivable follow-up covers how to chase payment without becoming the villain.

Inventory. Stock feels safe because it's "still worth something." It is, eventually. Slow movers, duplicate SKUs and big just-in-case orders are cash wearing a cardboard costume. If you sell online, inventory and COGS for ecommerce explains how to see your true margin and what's actually moving.

Payables. Paying every bill the day it arrives feels responsible, and it does shrink your cash cycle in the wrong direction. Pay on the agreed due date instead. Don't stretch suppliers past their terms, though. Late fees and a damaged relationship cost more than the float is worth.

Work in progress. Contractors and agencies often carry work that's done but not yet billable because of a milestone or a monthly billing cycle. Billing in smaller, more frequent pieces (where the contract allows) shortens the wait.

Working capital management steps for the next 90 days

1. Get the balance sheet reconciled. If receivables include invoices that were paid months ago, every number above is fiction.
2. Calculate DSO, DIO and DPO from the last 12 months. Write them down.
3. Run an AR aging report and an inventory report sorted by last sale date. Circle anything older than 90 days.
4. Pick one lever, not four. Usually it's receivables.
5. Recalculate next quarter and compare.

That fifth step matters. A cycle that shrinks from 77 days to 65 shows up in the bank before it shows up anywhere else.

Why the numbers underneath have to be right

None of this works on rough books. If customer payments get recorded as new revenue instead of applied to invoices, receivables look bigger than they are and DSO looks terrible for no reason. If inventory isn't counted and adjusted, DIO is a guess. We see this a lot: an owner trying to manage a number that was never accurate to begin with.

That's why our financial clarity work starts with reconciled, reviewed balance sheets. Once the numbers hold up, a fractional CFO can turn them into targets and a cash plan; that's the job of our CFO services. And if you're profitable on paper but the bank account disagrees, profitable but no cash? traces the other places money goes.