How is this different from the EOQ calculator?

The EOQ calculator tells you the optimal quantity to order in a frictionless world. This calculator measures what happens when a supplier will not sell you that quantity: it prices the gap between the MOQ you must order and the EOQ you would choose, so you can negotiate with a number instead of a feeling.

Is a supplier MOQ always bad for the buyer?

No. If the MOQ is at or below your EOQ, it costs you nothing. And suppliers often trade MOQs against price — a higher minimum with a lower unit price can beat a low minimum at list price. Compare the MOQ penalty from this calculator against the unit-price difference to decide.

What can I negotiate instead of a lower MOQ?

Common alternatives: a blanket purchase order at MOQ volume with smaller scheduled releases, vendor-managed or consignment stock where the supplier holds the inventory, mixed-SKU minimums that let several items share one MOQ, or a modest unit-price premium for smaller lots — often cheaper than carrying months of excess.

Inventory Planning

MOQ Impact Calculator

The MOQ Impact Calculator quantifies the cost penalty of a supplier-imposed minimum order quantity: it compares the MOQ against your economic order quantity (EOQ) and computes the excess units per order, months of supply each MOQ order represents, and the extra annual holding and ordering cost the MOQ forces on you.

Input Parameters

Annual Demand (units)

Supplier MOQ (units)

Unit Cost ($)

Ordering Cost ($ per order)

Annual Holding Cost Rate (%)

Typically 20–30% of item value per year

Results

Enter values to see results

Formula

EOQ = √(2DS / H) · Annual Cost at Q = (D/Q) × S + (Q/2) × H · MOQ Penalty = Annual Cost at MOQ − Annual Cost at EOQ

D is annual demand, S the cost per order, and H the holding cost per unit per year (unit cost × holding rate). The EOQ is the order quantity that minimizes total ordering-plus-holding cost. When the supplier's MOQ exceeds your EOQ, every order carries excess inventory; the penalty is the difference between total annual cost ordering at the MOQ versus at the EOQ. If the MOQ is below your EOQ, it costs you nothing — you simply order the EOQ.

Variable Definitions

Annual Demand

Total units you expect to buy or consume per year.

MOQ

Minimum Order Quantity

The smallest quantity the supplier will accept per order.

Ordering Cost

Fixed cost per order: PO processing, receiving, inbound handling.

Holding Cost

Cost to hold one unit for one year — unit cost × annual holding rate (commonly 20–30%).

Example Calculation

Scenario: A buyer faces a 5,000-unit MOQ on a component: - Annual demand: 12,000 units · Unit cost: $8 - Ordering cost: $90/order · Holding rate: 25% → H = $2.00/unit/yr Calculation: EOQ = √(2 × 12,000 × 90 / 2.00) = 1,039 units Annual cost at EOQ = (12,000/1,039) × $90 + (1,039/2) × $2.00 = $2,078 Annual cost at MOQ = (12,000/5,000) × $90 + (5,000/2) × $2.00 = $5,216 MOQ penalty = $3,138 extra per year Excess per order = 5,000 − 1,039 = 3,961 units Months of supply per order = 5,000 ÷ 1,000/month = 5.0 months That $3,138 is the number to bring to the negotiation — or the saving available from a supplier with a lower minimum.

How to Interpret Your Result

• The MOQ penalty is a real, recurring cost — treat it as part of the supplier's effective price when comparing quotes. • Months of supply per MOQ order is the risk lens: 6+ months of supply on one order exposes you to obsolescence, engineering changes, and demand shifts. • Negotiating options: ask for a lower MOQ at a slightly higher unit price (compare against the penalty), scheduled releases against a blanket PO, or vendor-held stock. • If the MOQ is below your EOQ, the constraint is not binding — order your EOQ and ignore the minimum.

Related Calculators

Related Glossary Terms

Minimum Order Quantity Economic Order Quantity Holding Cost Price Break