Run it with less chaos · Every business
How Product-Selling Service Businesses Free Up Cash Tied Up in Inventory
For a salon, auto repair shop, med spa or gym that also sells products, the stockroom holds cash in a different shape, and a few simple counts show how much of it could be back in the bank account within a season.
At a glance
- Inventory turnover, the number of times a year the products on the shelf sell and are replaced, tells an owner how long cash sits as stock before it returns as revenue.
- Small businesses run on thin cushions; a JPMorgan Chase Institute study of 597,000 small firms found the median held enough cash for 27 days of outflows, and personal services firms only 21.
- In an illustrative shop with $24,000 in stock and $72,000 a year in product costs, moving from three turns a year to six frees $12,000, about 20 more days of cash at $600 a day in outflows.
- The cash usually comes from the slowest third of the shelf, so the work is to count, rank items by sales, cut the slow ones and set reorder points for the fast ones.
- Costs are rising for most owners; in the Federal Reserve's 2025 survey, more than four in 10 small employer firms cited tariff-related costs, which makes every dollar sitting on a shelf more expensive to replace.
Part 1 | Cash on the shelf is cash out of the account
Every bottle of shampoo on a retail wall, every filter and brake pad in a parts room, and every tub of protein powder behind a gym's front desk was paid for with money that is no longer available for payroll or rent, and it comes back only when a customer buys it. A service business that sells products is in effect running two businesses, one that turns hours into revenue within days and one that turns cash into stock and waits, sometimes for months, for the stock to turn back into cash.
That wait matters because most small businesses have little room for it. The JPMorgan Chase Institute analyzed 470 million transactions from 597,000 small businesses and measured cash buffer days, the number of days a firm could cover its usual outflows from its balance if no money came in; the median was 27 days, and a quarter of firms held fewer than 13.
The common instinct runs the other way: The distributor gives us 10% off if we order by the case, so buying in bulk saves money. A case discount does save money on each unit, though only if the extra units sell before the cost of holding them, in borrowed money, shelf space, expired product and items that walk out the door, eats the discount.
Part 2 | Three counts show where the cash is stuck
The first count is turnover, calculated as the annual cost of products sold divided by the average value of inventory at cost. A shop that spends $72,000 a year on the products it sells and keeps $24,000 on hand turns its inventory three times a year, which means the average item sits for about 122 days before it sells.
The second is a benchmark. U.S. retailers as a whole held about 1.27 months of sales in inventory in July 2026, according to Census Bureau data published through the St. Louis Fed, roughly 39 days; retail is a different business from a salon or repair shop, but the figure gives an owner a sense of scale when their own shelf holds four months.
The third count ranks every item by sales, a method inventory textbooks call ABC analysis. In most stockrooms a small group of A items produces most of the product sales, a middle group of B items produces some, and a long tail of C items sells rarely while taking up a large share of the cash, so the average turnover hides very different speeds.
| Item group | Items | Share of annual product sales (at cost) | Inventory on hand | Turns per year | Days on the shelf |
|---|---|---|---|---|---|
| A (best sellers) | 8 | 70% ($50,400) | $7,200 | 7.0 | 52 |
| B | 12 | 20% ($14,400) | $6,000 | 2.4 | 152 |
| C (slow movers) | 20 | 10% ($7,200) | $10,800 | 0.7 | 548 |
| Total | 40 | $72,000 | $24,000 | 3.0 | 122 |
Holding stock also brings losses that never appear on an invoice. The National Retail Federation's 2023 security survey put retail shrink, the inventory lost to theft, damage and errors, at 1.6% of sales in fiscal 2022, and products with a shelf life, such as hair color, skincare and supplements, add expiry to that list.
Part 3 | Freeing the cash without emptying the shelf
The goal is to shrink the slow part of the shelf while protecting the fast part, since running out of best sellers costs sales. A worldwide study of retail out-of-stocks, covering 661 stores and 71,000 shoppers in 29 countries, found that 31% of shoppers facing an empty shelf went to another store and 9% bought nothing, and 47% of out-of-stocks traced back to the store's own ordering and forecasting.
| Annual cost of products sold (Assumption) | $72,000 |
|---|---|
| Inventory on hand today (Assumption) | $24,000 |
| Turns today (Calculated ($72,000 ÷ $24,000)) | 3.0 |
| Target turns (Assumption) | 6.0 |
| Inventory needed at target (Calculated ($72,000 ÷ 6)) | $12,000 |
| Cash freed (Calculated ($24,000 − $12,000)) | $12,000 |
| Average daily cash outflows (Assumption) | $600 |
| Extra cash buffer days (Calculated ($12,000 ÷ $600)) | 20 |
| Interest avoided if that stock was on a credit card (Calculated ($12,000 × 22.36%, the Federal Reserve's August 2026 average rate on credit card accounts assessed interest)) | $2,683 a year |
Illustrative example; replace every assumption with your own numbers. In this example, A stock stays at $7,200, B stock falls to $2,400 and C stock falls to $2,400.
The steps that produce that change are ordinary ones. Count everything once at cost, rank items by the last 12 months of sales, then stop reordering C items, sell through or return what the distributor will take back, and keep a short list of C items to order only when a customer asks. For A and B items, set a reorder point, the stock level at which you place the next order, so best sellers are replaced before they run out, and ask distributors whether smaller, more frequent orders are possible now that you know your real weekly sales.
How you compare
- Cash cushion: the median small business in the JPMorgan Chase Institute study held 27 days of outflows; personal services held 21 and retail 19.
- Stock on hand: U.S. retailers held about 1.27 months of sales in inventory in July 2026; a service business holding four or more months of product sales has room to free cash.
- Your own baseline: calculate your turns and days on hand this month from your product purchases and a single count, then repeat the count in 90 days.
Questions to ask this week
What is on our shelves, at cost, right now? One evening's count with a spreadsheet is enough to start.
Which 20 items have not sold in 90 days? Those are the first candidates to return, bundle or stop ordering.
Which items have we run out of in the past month? Those need reorder points before anything else is cut.
Is any stock sitting on a credit card balance? At about 22% interest, slow stock costs more than most case discounts save.
The next step is a single count at cost, ranked by sales, which turns the stockroom from a guess into a list of which items hold your cash.
About this research: This article draws on the JPMorgan Chase Institute's study of 597,000 small businesses, Census Bureau inventory-to-sales data via FRED, the Federal Reserve Banks' Small Business Credit Survey, Federal Reserve consumer credit data, the National Retail Federation's security survey and a worldwide study of retail out-of-stocks. The ABC method is a standard inventory framework. The shop example is illustrative; the buffer day data date from 2015 transactions and the out-of-stock study from 2002, so treat them as patterns rather than current levels.
Sources
- Farrell, D. and Wheat, C. Cash Is King: Flows, Balances, and Buffer Days. JPMorgan Chase Institute, 2016. 597,000 small businesses.
- U.S. Census Bureau via Federal Reserve Bank of St. Louis. Retailers: Inventories to Sales Ratio (RETAILIRSA). FRED, July 2026.
- Federal Reserve Banks. 2026 Report on Employer Firms: Findings from the 2025 Small Business Credit Survey. 2026. 6,525 employer firms.
- Board of Governors of the Federal Reserve System via FRED. Commercial Bank Interest Rate on Credit Card Plans, Accounts Assessed Interest (TERMCBCCINTNS). August 2026.
- National Retail Federation. National Retail Security Survey 2023. 2023.
- Gruen, T., Corsten, D. and Bharadwaj, S. Retail Out-of-Stocks: A Worldwide Examination of Extent, Causes and Consumer Responses. Grocery Manufacturers of America, Food Marketing Institute and CIES, 2002. 661 stores, 71,000 consumers in 29 countries.
- Silver, E. A., Pyke, D. F. and Thomas, D. J. Inventory and Production Management in Supply Chains, 4th ed. CRC Press, 2017. (ABC classification and reorder point framework.)
Related reading: Retail Inventory for Salons and Spas: What to Stock and How Much · What Unsold Inventory Really Costs Each Month · How to Set a Reorder Point (With a Simple Formula)
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