The short answer
Freight is priced on one of two bases - actual weight or volumetric weight, whichever is larger - and then adjusted for mode, route and season. Tea is light for the space it occupies, so for most shipments the cube, not the scale, decides the chargeable figure. That single fact explains most surprises in a tea freight quote: the fluffy carton of Silver Needle bills like a much heavier one, the retail-ready packing inflates the bill compared to bulk foil bags, and the same lane can reprice between two bookings a month apart. None of this is a mystery once you see the levers, and all of it can be managed at the packing bench before anyone talks about rates. The levers, in order of size: mode, cube, density, season. A buyer who controls even two of them usually beats a buyer who negotiates hard on none, because the rate is the last multiplier on a number the shipment itself already determined. This note walks the levers in that spirit - understand what the invoice measures first, then optimize the shipment, then negotiate.
Chargeable weight: the rule behind the bill
Carriers convert a shipment's volume into a notional weight and charge the greater of the two. A dense load - puer cakes, CTC granules, tightly rolled oolong - bills at actual weight because it maxes out the scale first. A bulky load - Silver Needle, big-leaf whites, florals, anything in loose display cartons - hits the volume limit and bills on imaginary kilograms. This is why the desk asks for packed dimensions and weights per carton, not just a tonnage figure, before requesting freight: the same 300 kilograms can be three pallets or half a pallet depending on format, and the quote follows the pallets. The practical consequence for buyers is simple - when comparing programs, compare chargeable weight, never gross weight, and ask which of the two your quote is built on. Volumetric conversions also differ between modes - air, courier and sea each use their own divisor - so the same carton can be chargeable at different weights on different services. Ask for the conversion, or better, ask for the chargeable weight printed on the quote itself: a quote that shows chargeable weight is a quote you can argue with; one that shows a lump sum is a quote you can only accept or refuse.
Mode, route and season
Beyond the weight rule, three factors set the level. Mode is the biggest: courier samples in 3-7 days carry the highest per-kilogram premium, air freight in 5-10 days sits in the middle, and sea freight - 15-25 reference days to the US West Coast, 30-45 to Europe - resets the whole cost structure downward per kilogram. Route matters next: direct lanes beat transshipment lanes, and some destination ports simply carry more handling cost than others. Season is the least predictable: capacity tightens and rates firm up ahead of major holiday windows and harvest-season shipping pushes, then soften again. Quotes respond to all three, which is why they carry validity periods - a number from two months ago is not a number. Treat every figure as a snapshot tied to a lane, a mode and a date, and confirm the validity when you receive it. Fuel adjustments, currency movements and capacity swings all pass through quotes - none of that is a reason to distrust the number, only a reason to date-stamp it.
Packing is the first lever
Because cube so often drives the bill, packing decisions are freight decisions. Right-sized cartons beat oversized ones; square pallet patterns beat mixed ones; compressed or dense formats beat airy ones. Retail-ready packaging - display boxes, individual cartons, gift packaging - adds real cube, and for some programs the honest answer is to ship bulk and pack closer to the market, a trade-off covered in the bulk versus retail-packed note. Where retail packing is required, the format choices on the packaging options page can be made with freight in mind: slimmer cartons, fewer air gaps, stackable footprints. None of this changes the tariff; it changes how much of the tariff each kilogram absorbs. Buyers who review cube at the sample stage routinely shave double-digit percentages off freight per kilogram without negotiating a thing.
A relative-cost map
| Shipment profile | Typical mode | Relative cost per kg | Why |
|---|---|---|---|
| 2 kg reference samples, door to door | Courier | Highest | Speed and handling density; small shipments pay full service rates |
| 150 kg launch stock, date-critical | Air freight | High | 5-10 day transit buys calendar certainty at a mid-range premium |
| 600 kg reorder, bulk foil bags | Sea LCL | Moderate | Container economics without needing a full box; some handling overhead |
| 2,400 kg repeat program, dense cartons | Sea FCL | Lowest | Full box utilization spreads fixed costs across maximum weight |
The table is deliberately ordinal - no figures, because rates move constantly. The pattern it shows is stable, though: cost per kilogram falls as mode slows and as loads get denser and fuller.
Who pays for what, and getting a firm number
Freight cost is only half the question; the other half is who owns each leg. That is what Incoterms settle - whether the seller hands over at the factory gate, on board at a Chinese port, or delivered to your door - and it changes what a quote even contains. The term-by-term breakdown is in the Incoterms note. Destination charges deserve their own respect: terminal handling, documentation, customs entry and delivery are real money at the far end, and they vary by port and by forwarder. Landed-cost planning counts them; a freight quote that ignores them is only half a quote. Once terms are set, getting a firm number is a discipline: give the desk real packed dimensions and weights, the port pair, the mode and the ready date; receive the quote with its validity period; and book promptly once production is confirmed. Booking late in a peak window turns a planning number into a problem, and the scheduling rules of thumb live on the logistics and shipping page alongside the MOQ and lead-time ranges. For volume programs, the desk folds freight planning into the written program at quotation stage, so the number you plan around is one someone actually confirmed.