The Deal Saved Him ₹4,000. Holding the Stock Cost ₹11,000.
Every bulk deal is presented as a saving and most are, on the invoice. Whether it is a saving for your shop depends on how long the stock sits and what the money would have done instead.
The offer was straightforward: buy six months of a fast-selling cooking oil at once and take 4% off. On ₹1 lakh of stock, that is ₹4,000, and Chandran took it without much thought because ₹4,000 is ₹4,000.
What it actually cost him, over the five months the stock took to sell: ₹6,200 of interest on the overdraft he ran to cover the tightness it created, ₹2,800 of oil that went rancid in a hot storeroom, and a ₹2,000 price drop in month four that he could not take advantage of because he was already full. Around ₹11,000 against a ₹4,000 saving.
What Holding Stock Costs
Most shopkeepers treat stock as costing nothing to hold, because no invoice arrives for it. The cost is real, it is continuous, and it is roughly calculable.
- The money itself — either interest you are paying, or the return it would have earned elsewhere in the shop
- Spoilage, breakage and expiry, which scale with time held and are worse in Indian storerooms than most estimates allow
- Space, which is genuinely scarce and has an opportunity cost in what else could occupy it
- Price risk, in both directions — a fall leaves you holding expensive stock, and a supplier promotion you cannot use is the same loss
- Obsolescence, particularly for anything with packaging changes, seasonal relevance or fashion
Added up, carrying cost for a typical small shop runs somewhere between 20% and 30% a year of the value held — higher for perishables, lower for stable packaged goods. Which means holding stock for six months costs on the order of 10-15% of its value.
Against that, a 4% discount is not a saving. It is a loss with a discount attached.
Nobody sends you a bill for stock sitting on a shelf, so I assumed it was free.
The Calculation, Done in Two Minutes
It is not complicated and it does not need a spreadsheet.
- How long will this take to sell? Use actual movement, not optimism — last year’s sales divided by twelve
- Multiply months held by roughly 2% a month of carrying cost. Six months is about 12%
- Compare that against the discount offered
- If the discount is smaller, the deal costs money regardless of how it is presented
A 4% discount justifies about two months of stock. A 10% discount justifies about five. Anything beyond that needs a reason other than the discount — a genuine shortage ahead, a known price rise, or a festival you have planned for.
Where a distributor wants volume for its own targets, the discount is often available on a standing commitment rather than a single delivery — the same total over three months, delivered in three lots. You get the rate, they get the volume, and you avoid the carrying cost entirely. It is asked for far less often than it is granted.
When Bulk Genuinely Wins
The answer is not "never". There are clear cases, and they share a shape.
- Fast movers that will clear in weeks rather than months, where carrying cost is trivial
- Non-perishables with stable demand and no packaging or seasonal risk
- A known price increase ahead, where you are buying at today’s rate against tomorrow’s
- Festival stock you have planned quantities for from last year’s actual sales
- Deep discounts — 15% and above on something that moves — where the arithmetic clears easily
Notice that every one of these requires knowing your own movement rate. Without that number, every deal looks equally good, which is precisely why they are offered to shops that do not track it.
The Cash Constraint Sits On Top
One more filter, and it overrides the arithmetic. Even a genuinely good deal is a bad decision if it leaves you unable to buy what sells next week.
Chandran’s rule now is that no single purchase takes more than a fixed share of his available cash, regardless of how good it looks. He has turned down deals that were arithmetically sound, and he has not once regretted having money available in a month when something unexpected arrived.
Mapis shows how long each product’s current stock will last at its actual rate of sale, so the first number in this calculation is on screen before you answer the offer.
Frequently asked questions
How do I know if a bulk discount is worth taking?
Work out how many months the stock will take to sell at your actual rate, multiply by roughly 2% a month of carrying cost, and compare against the discount. Six months of stock costs about 12% to hold, so a 4% discount on six months is a loss. A 4% discount justifies roughly two months of stock.
What is the carrying cost of inventory for a small shop?
Typically 20-30% a year of the value held — the cost of the money, spoilage and expiry, space, price risk and obsolescence. It is higher for perishables and lower for stable packaged goods. No invoice ever arrives for it, which is why most shopkeepers treat holding stock as free.
When is buying in bulk genuinely a good idea?
For fast movers that clear in weeks, non-perishables with stable demand, ahead of a known price increase, for festival quantities planned from last year’s actual sales, and at deep discounts of 15% or more on something that moves. Every one of these requires knowing your own rate of sale.
Can I get a bulk rate without holding bulk stock?
Often, yes. Where the distributor wants volume for their own targets, the discount is frequently available against a standing commitment delivered in several lots — the same total over three months rather than one delivery. You get the rate, they get the volume, and you avoid the carrying cost. It is granted far more often than it is asked for.