Supplier MOQ vs Demand Cost Calculator
Suppliers set minimums and price breaks that rarely match your demand. This calculator tests whether the discount and fewer orders justify the extra stock you would carry.
Your numbers
Your results
Excludes obsolescence, engineering change and shelf life risk, which can erase the benefit on long cover. Review those separately before committing.
Net annual benefit vs MOQ size
Sweeps Supplier MOQ or break quantity from 500 to 8000, holding your other inputs fixed.
MOQ excess inventory scan
Optional: we can scan item and supplier data for minimum orders that create long cover.
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How to use it
Enter monthly demand, the supplier's minimum or break quantity and the quantity you would buy otherwise. Add the normal price, the discount at the break, the cost of a purchase order and your carrying rate. The result shows months of cover per order and the net annual benefit after adding price and order savings and subtracting extra carrying cost.
- Use your real carrying rate, including obsolescence.
- Compare to the quantity MRP would actually order.
- Check shelf life before accepting long cover.
The method
Price savings equal annual demand times unit price times the discount. Ordering savings equal the difference in orders per year times the cost per order. Carrying cost uses average inventory, which is half the order quantity, times the unit price and carrying rate, with the discounted price applied to the MOQ case. Net benefit adds the savings and subtracts the extra carrying cost.
Worked example
Demand of 250 a month with a 3,000 unit MOQ means 12 months of cover. A 6 percent discount on 3,000 units a year of 8.50 dollars saves 1,530 dollars and ordering saves about 180 dollars, but extra carrying cost is about 2,800 dollars, so the net is negative. Reduce the MOQ in the chart to see where the benefit turns positive. That crossover is a useful number for negotiation.
Common mistakes
Buyers often forget that cash tied up in stock has a cost, and that engineering changes can strand a large buy. Another mistake is ignoring that many ERPs round planned orders up to the MOQ, which can create excess supply that MRP then reports as reschedule-out or cancel exceptions. Record the MOQ in the item or supplier record so the plan reflects it.
Frequently Asked Questions
Should I always take the price break?
No. If the extra carrying and obsolescence cost exceeds the savings, a smaller order is cheaper. Long shelf life and stable demand favor the larger buy.
How should I handle blanket orders?
A blanket order or scheduled releases can capture the break price while delivering in smaller lots. Ask suppliers for this before committing to the full MOQ in one delivery.
What carrying rate should I use?
Include cost of capital, storage, handling, insurance, shrinkage and obsolescence. Rates between 15 and 30 percent are common in manufacturing, but use your finance team's number.
How does MOQ affect MRP?
Planned orders are rounded up to the minimum, which can supply several periods of demand. The excess shows up in projected inventory and may trigger exception messages.
Netray can scan your item and supplier data for MOQs that create months of excess cover and rank them by the carrying cost involved.
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