The inventory to working capital ratio is your stock divided by your working capital: current assets minus current liabilities. It shows how much of the money that runs the business sits on shelves. Above 1, your cash and what customers owe you no longer cover your short-term debts.
This guide works the ratio through a Dar es Salaam wholesaler's month-end figures in Tanzania shillings. It shows why 1 is the line that matters, and how buying on credit, selling and borrowing move the ratio.
The inventory to working capital ratio formula
Inventory to working capital ratio = inventory ÷ (current assets − current liabilities). Some guides multiply by 100 and quote a percentage; the meaning is the same.
Corporate Finance Institute defines working capital the same way. Current assets are cash, inventory and receivables; current liabilities are payables, short-term loans and expenses due.
| Input | What it includes | Where a small business finds it |
|---|---|---|
| Inventory | Goods for sale at cost, on the shelves, in the store room and at other branches | A stock valuation at cost, on the same day as the rest |
| Current assets | Cash in the till and at the bank, money customers owe you, inventory | The three figures added up, or your balance sheet |
| Current liabilities | Money owed to suppliers, overdrafts and loans due within a year, rent and tax due | Supplier balances, the bank statement, your bills |
| Working capital | Current assets − current liabilities | The difference between the two lines above |
Count every current asset, cash included. Cash and receivables are liquid assets: they pay a bill this week, while stock must be sold first.
Count every current liability too, not just suppliers. An example that adds stock and receivables and subtracts only payables gives a working capital that doesn't exist.
A worked example in Tanzania shillings
For example, take a wholesaler of household goods in Kariakoo, Dar es Salaam, at the end of a month. It sells to shops on 30-day credit and imports some lines through the port. The figures are illustrative, not a real business's.
| Line | TZS |
|---|---|
| Cash in the till and at the bank | 30,000,000 |
| Owed by customers | 50,000,000 |
| Inventory at cost | 200,000,000 |
| Current assets | 280,000,000 |
| Owed to suppliers | 110,000,000 |
| Bank overdraft | 40,000,000 |
| Rent and tax due | 10,000,000 |
| Current liabilities | 160,000,000 |
| Working capital (280,000,000 − 160,000,000) | 120,000,000 |
| Inventory to working capital ratio (200,000,000 ÷ 120,000,000) | 1.67 |
The wholesaler's stock is worth 1.67 times its working capital. Cash and receivables come to TZS 80,000,000 against TZS 160,000,000 owed, so TZS 80,000,000 of its short-term debts can only be paid by selling stock.
Its current ratio, 280,000,000 ÷ 160,000,000 = 1.75, looks comfortable. The inventory to working capital ratio shows what the current ratio hides: 71% of those current assets is stock.
Why 1 is the line that matters
A ratio above 1 means your cash and receivables are smaller than your current liabilities. The ratio crosses 1 at exactly the point where the quick ratio falls below 1.
The arithmetic is short. Working capital is cash + receivables + inventory − current liabilities, so inventory can only exceed it when cash + receivables fall short of current liabilities. That holds whenever working capital is positive.
The quick ratio sets cash and receivables against current liabilities and leaves stock out. CFI's reason is that stock "may take too long to convert" into cash for pressing bills.
| Ratio | What it means | Quick ratio |
|---|---|---|
| Below 1 | Cash and receivables alone cover every short-term debt | Above 1 |
| Exactly 1 | They cover the debts with nothing to spare | Exactly 1 |
| Above 1 | Part of the short-term debts can only be paid by selling stock | Below 1 |
| Negative | Current liabilities exceed current assets; the ratio means nothing | Read it instead |
Guides that call 1 "balanced" and 2 or 3 "too much" give no source, and no standards body publishes a target. How far above 1 is safe depends on speed: how fast stock turns into cash against when the bills fall due.
If stock sells in 30 days and suppliers give 60, a ratio of 2 is safe. If stock takes 120 days to sell and the overdraft is due in 30, a ratio of 1.2 is not. The days inventory outstanding formula gives your stock's speed.
What moves the ratio: six everyday events
Some events move the ratio the way owners expect, and some don't. Each row starts from the month-end figures above.
| Event | Inventory | Working capital | Ratio | Quick ratio |
|---|---|---|---|---|
| Month end, as above | 200,000,000 | 120,000,000 | 1.67 | 0.50 |
| A. A container worth 60,000,000 arrives on 60-day supplier credit | 260,000,000 | 120,000,000 | 2.17 | 0.36 |
| B. 20,000,000 of stock bought for cash | 220,000,000 | 120,000,000 | 1.83 | 0.38 |
| C. Stock that cost 40,000,000 sold to shops for 48,000,000 on credit | 160,000,000 | 128,000,000 | 1.25 | 0.80 |
| D. A customer pays 20,000,000 they owed | 200,000,000 | 120,000,000 | 1.67 | 0.50 |
| E. 40,000,000 of slow stock cleared at cost, for cash | 160,000,000 | 120,000,000 | 1.33 | 0.75 |
| F. The 40,000,000 overdraft replaced by a two-year loan | 200,000,000 | 160,000,000 | 1.25 | 0.67 |
Buying on credit raises the ratio without spending a shilling (row A). Stock and debt grow together, so working capital stays the same, but more of it is stock.
Collecting a debt changes nothing (row D), because one current asset becomes another. Selling stock at a profit (row C) and clearing slow stock (row E) are what bring the ratio down.
Moving debt beyond the next 12 months lowers it too (row F). The guide to inventory financing compares supplier credit, bank loans and what each really costs.
When working capital is negative
When current liabilities exceed current assets, working capital is negative and so is the ratio. A negative figure isn't "low": the formula has stopped measuring anything.
CFI notes that grocery stores and fast-food chains can run negative working capital and still do well. Its reason: they turn stock fast and collect from customers within a few days, so the stock sells before the supplier's bill falls due.
For a small shop, negative working capital usually means supplier credit or an overdraft is carrying the stock. Read the quick ratio and the dates your bills fall due, and see how inventory affects cash flow.
Inventory to working capital ratio vs other ratios
Each ratio answers a different question, so read this one beside the others. The wholesaler's figures show how far apart they can sit.
| Ratio | Formula | The question | The wholesaler |
|---|---|---|---|
| Inventory to working capital | Inventory ÷ (current assets − current liabilities) | How much of my short-term money is stock? | 1.67 |
| Current ratio | Current assets ÷ current liabilities | Do short-term assets cover short-term debts? | 1.75 |
| Quick ratio | (Cash + receivables) ÷ current liabilities | Can I pay without selling stock? | 0.50 |
| Inventory turnover | Cost of goods sold ÷ average inventory | How many times does stock sell in a year? | Needs a year's figures |
| Inventory to sales ratio | Average inventory ÷ net sales | How many months of sales sit in stock? | Needs a month's sales |
A high ratio with fast inventory turnover is far safer than the same ratio with slow turnover. The inventory to sales ratio shows the same stock against sales instead of against the balance sheet.
How to lower the ratio
Hold less stock for the same sales, and keep the profit it earns in the business. Each step below maps to a row of the table above.
- Clear stock that hasn't sold in 90 days. Price it down, bundle it with a fast seller or agree a return with the supplier (row E). See dead stock.
- Buy fast sellers smaller and more often when the supplier is close and reliable. Smaller orders also cut holding costs: interest, rent, power and losses.
- Order at a reorder point, not by feel. Avoiding overstocking and understocking sets the level for each product.
- Keep profits in the business. Profit kept as cash or receivables adds to working capital (row C).
- Move short-term debt to a longer loan when the stock it funds takes months to sell (row F).
- Don't expect longer supplier credit to fix it. Credit protects your cash, but stock bought on credit raises this ratio (row A).
Check the ratio on the same day each month, and before any large order on credit. A seasonal stock-up lifts it for a few weeks, so compare each month with the same month last year.
How to find each input in ArmPOS
ArmPOS has no screen that works out this ratio. Its reports give the stock, customer and supplier figures, while loans, rent and tax due come from your own records.
- Stock at cost. Reports › Inventory Valuation multiplies each product's stock on hand by its cost and totals it at the bottom (Stock reports). For a past month end, Reports › Analytics Report shows Closing stock (By purchase price) (Sales reports).
- Owed by customers. Reports › Customers Report shows each customer's Total Sale Due. Add them up (Customer and supplier reports).
- Owed to suppliers. Reports › Suppliers Report shows each supplier's Total Purchase Due. Add each supplier's row yourself, as the guide advises.
- Cash. On plans with Accounting, Accounting › List accounts shows each cash and bank account's balance (Bank and cash accounts). Otherwise count the till and read the bank statement.
- Don't copy inventory from the Balance Sheet. The ledger adds every purchase to Inventory but never posts the cost of goods sold. That line only grows until someone posts the cost by a journal entry (Chart of accounts and journal), so use the Inventory Valuation total.
Frequently asked questions
What is a good inventory to working capital ratio?
No standards body publishes a target. Below 1, you can pay short-term debts without selling stock; above 1, the safe level depends on how fast stock sells against when bills fall due.
Is a high ratio a sign of strong performance?
No. A high ratio means paying your bills depends on selling stock. That is manageable for a grocer whose stock sells in days and risky for a hardware or fashion shop whose stock sells in months.
What does a negative inventory to working capital ratio mean?
Your working capital is negative: you owe more within the year than your current assets are worth. The ratio no longer measures anything, so read the quick ratio and your due dates instead.
Is inventory a current asset?
Yes, stock you hold for sale in the normal course of business is a current asset. Is inventory an asset? explains when it stops being one.
How often should I calculate it?
Monthly, on the same day, and before any large order on credit. Track it over several months, because seasonal buying swings it.
Work out this month's ratio from four figures: stock at cost, cash, what customers owe you and what you owe. Create a free ArmPOS account to keep stock, customer and supplier balances in one place; wholesalers in Tanzania can start from ArmPOS in Tanzania.
