Why cost per unit falls off a cliff between 200 and 500 units

Key Takeaways

• Per-unit freight cost doesn't decline smoothly with volume, it drops sharply once a shipment crosses from LCL (less than container load) into FCL (full container load) pricing, typically between 12 and 18 cubic metres.
• For many small-to-mid sized products, that CBM range translates to roughly 200-500 units, which is why cost per unit appears to "fall off a cliff" at that order size rather than gradually improving.
• Ordering just below the threshold to save on upfront cost usually costs more per unit than ordering just above it, once landed freight is counted properly.

Cost per unit doesn't fall in a straight line as order quantity rises. It falls gradually as fixed costs like documentation and handling get spread across more units, then drops sharply at a specific volume, then flattens again. That sharp drop is the LCL-to-FCL breakeven point, and for many product categories it lands somewhere between 200 and 500 units, which is why buyers who've never modelled it experience it as a cliff rather than a curve.

What actually causes the cliff

LCL (less than container load) freight is priced per cubic metre, and it carries a premium over FCL (full container load) because the carrier is consolidating your cargo with other shippers' freight, adding handling and deconsolidation cost at destination. The economic breakeven between the two typically sits at 12-18 cubic metres, depending on trade lane and local port charges (FCL vs LCL breakeven analysis, retrieved 2026-09-08). Below that volume, LCL is usually cheaper in absolute terms even though its per-CBM rate is higher; above it, booking a full container (or paying FCL rates for partial use) becomes cheaper overall.

A 20-foot container holds roughly 33 CBM and a 40-foot container roughly 67 CBM of nominal capacity, though usable volume is always somewhat less once packing efficiency is accounted for (container capacity reference, retrieved 2026-09-08). The 12-18 CBM breakeven sits at roughly a third to half of a 20-foot container's nominal capacity, which is the range where many importers find it worth paying for capacity they won't fully use, because the per-unit rate improvement outweighs the unused space.

Translating cubic metres to units

The CBM-to-units conversion depends entirely on your product's carton dimensions, so there's no universal "200-500 units" rule, that range is illustrative for products in the small-appliance-to-medium-carton size class. Run your actual carton dimensions and target order size through the shipping cost per unit calculator to find where your specific product crosses the LCL-to-FCL threshold, since a bulkier product might hit the cliff at 100 units and a compact one at 1,000.

The mechanism is the same regardless of product: below the CBM breakeven, every additional unit adds LCL freight cost at the higher per-CBM rate. Cross the breakeven, and the marginal cost of filling the remaining container space is close to zero, because you're already paying for the container. That's the cliff.

Why ordering just below the threshold usually costs more

A buyer who orders 180 units to "save" on the upfront purchase cost, when 220 units would have crossed into FCL-priced territory, often pays a higher landed cost per unit than if they'd ordered the larger quantity. The extra 40 units cost almost nothing in incremental freight once the container is booked, while the smaller order pays the full LCL premium on every unit.

This is worth checking explicitly before finalising an order size, not assumed. Two costs move in opposite directions around the threshold: LCL premium falls away as you approach FCL pricing, while carrying cost and capital tied up in unsold inventory rise with order size. The right order quantity is where those two curves cross, not simply "as much as the container holds."

What this changes about MOQ negotiation

Suppliers often quote MOQs (minimum order quantities) based on their own production efficiency, not your freight economics. If a supplier's MOQ sits comfortably below your CBM breakeven, negotiating it upward toward the breakeven point can lower your landed cost per unit even though the purchase order total rises, because the freight savings outweigh the extra unit cost. Model both sides, purchase price and freight, before treating a supplier's stated MOQ as the right order size.

For the broader growth-stage sourcing and volume decisions this feeds into, see trading growth strategy.

Frequently asked questions

Is the 200-500 unit range accurate for any product?

No, it's illustrative for products in a mid-sized carton range. The actual threshold depends on your carton dimensions and how much volume they occupy per unit; a bulky product crosses the CBM breakeven at a much lower unit count than a compact one.

Does the cliff apply to air freight too?

Air freight is priced by chargeable weight (the greater of actual or volumetric weight) rather than CBM breakeven, so the same LCL-to-FCL mechanism doesn't directly apply. Air freight pricing does have its own step changes at weight-break thresholds, but the underlying driver is different.

Should we always order enough to reach the FCL threshold?

Only if the extra units will actually sell within a reasonable holding period. The freight saving from crossing the threshold has to be weighed against the carrying cost and obsolescence risk of the additional inventory, not treated as a free win.

The bottom line

Cost per unit doesn't improve gradually with volume, it steps down sharply at the point your shipment crosses from LCL to FCL pricing. Know where that point sits for your specific product before setting order quantities, because ordering just below it is often more expensive per unit than ordering just above it.

Figures were verified on 8 September 2026 against published LCL/FCL breakeven and container capacity references. The exact breakeven point and unit-to-CBM conversion depend on your trade lane, carrier, and carton dimensions; model your own figures before setting order quantities.