Carrying cost is the total annual cost of holding inventory, expressed as a percentage of the stock's value. It combines capital tied up, storage, handling and insurance, and risk of obsolescence or damage. Most small stores never calculate it, which is precisely why over-ordering feels free.
In more detail
Every argument about whether to hold more stock is really an argument about carrying cost, usually conducted without either side knowing the number.
The largest component for a small store is normally capital. Money sitting in stock is money not buying something that moves, not funding advertising, and not sitting in the account when a supplier wants paying.
You do not need a precise figure. Even a rough percentage changes decisions, because it converts 'we might as well order extra' from free into a number you can weigh against the stockout it prevents.
How it is calculated
Carrying cost % = (capital + storage + service + risk costs) ÷ average inventory value
Worked example
You hold 50,000 of stock on average. Capital cost at 10 per cent is 5,000. Storage and handling attributable to stock is 3,000. Insurance is 500. You write off roughly 2,500 a year to damage and obsolescence.
Total is 11,000 on 50,000, so a carrying cost of 22 per cent. That means an extra 5,000 of safety stock held all year costs about 1,100. Worth it if it prevents more than that in lost margin, and not otherwise.
The figures above are invented to make the arithmetic legible. They are not a benchmark and should not be cited as one.
Where people get it wrong
- Counting only storage. Capital and obsolescence are usually larger.
- Assuming it is zero because the space is already paid for. The space has an alternative use even when the rent is fixed.
- Applying one rate to everything. Fashion and electronics carry far more obsolescence risk than staples.
- Calculating it once and never again. The capital component moves with your financing position.
Common questions
What goes into carrying cost?
Capital tied up in stock, storage and handling, insurance and taxes, and the risk of obsolescence, damage or shrinkage. Capital is usually the largest for a small store.
What is a typical carrying cost percentage?
Widely quoted figures sit somewhere around 20 to 30 per cent of inventory value a year, but the range is wide and depends heavily on category and financing. Estimate your own components rather than adopting a benchmark.
Why does carrying cost matter?
Because without it, ordering extra looks free. Putting a number on it turns over-ordering into a trade you can weigh against the stockout it is meant to prevent.