Why the quote moves between the cart and the warehouse

The waterfall: five lines between the cart figure and the warehouse figure

The figure that appears at the cart stage is an estimate built on what the seller says the item weighs, and the figure that appears after the parcel is built is a calculation built on what the warehouse measured. Between those two numbers sit five lines, and each one has a different owner.

The lines are chargeable weight, linehaul, handling, border charges and optional requests. Chargeable weight and the optional requests belong to the parcel. Linehaul, handling and border charges belong to the mode, the shipment count and the destination, which is why an argument about the quote is usually an argument about the wrong line.

Reading the waterfall in order also tells you which lines you can influence at the moment you are reading. Before the parcel is sealed, you can change volume, parcel count and content. After it is sealed, you can change the mode and the shipment count, at the cost of a rebuild. After it has shipped, only the border line remains, and that one is assessed rather than negotiated.

Why the linehaul line grows: chargeable weight against the mode divisor

Linehaul is the simplest line to explain and the most surprising in effect, because it multiplies a weight by a rate and the weight is not the one on the scale. The weight used is the greater of measured mass and volume weight, and volume weight is the packed volume divided by the divisor of the mode.

That division is why the same parcel can arrive at two very different figures on two modes. A carton of 72 litres implies 14.4 kilograms at a divisor of 5000 and 9.0 at 8000, so the mode you choose sets the weight before any rate is applied. Express air uses 5000, air economy 6000, rail and truck 7000, and sea 8000.

Then the rate does its work on top. The three rungs this desk publishes use planning rates of 9.4, 13.8 and 21.5 per kilo, which is a spread of more than two to one between the leanest and the fastest. Multiply a divisor effect by a rate spread and you have the two largest reasons a quote moves without anybody making a mistake.

One habit keeps the whole waterfall readable. Whenever a quote arrives, mark every line as belonging to the parcel, the mode, the shipment count or the destination, then change only the lines you own. Everything else is a figure to be checked rather than a decision to be made, and mixing the two is how a check turns into an argument.

1. Check the divisor before the rate, because a wrong divisor makes a right rate unreadable.
2. Check whether the line bills the greater of mass and volume, or the sum of both, before comparing two quotes.
3. Check the rounding step, since it is applied after the calculation and can add half a kilo to an otherwise correct figure.

Why the handling line multiplies: one fee per parcel built

Handling is a per-parcel fee, which makes it the only line that grows when an order is split. The published planning fees are 1.5, 2.2 and 3.4 per parcel depending on the rung, and the rung also caps how many parcels travel together, so the shipment count follows from the shape you chose rather than from your preference.

The count matters twice over. Each shipment pays the fee again, and each shipment is also a separate border assessment on the same declared goods, which is the part people miss when they split an order to save postage on a single heavy carton.

For a small order the fee is a rounding error. For an order that has been split across five shipments it is a line worth more than any packing request, and it is the line that most often turns a cheaper-looking split into a more expensive one.

Why the border line is a band and not a figure

Border charges are assessed on the landed value, which means the goods plus the postage you paid, and the rate comes from a category band rather than from a single figure. On the eight destinations this desk follows, footwear sits anywhere from zero to the high forties at one destination and between six and thirty at another, because fibre, construction and sole material decide the rate inside the band.

Two consequences follow for anybody reading a quote. The first is that postage is not a separate world: the more you pay to move a parcel, the larger the value the border assesses, which makes an expensive mode slightly self-defeating above a threshold. The second is that a band is not a prediction, so the honest planning figure near a threshold is the top of the band rather than its middle.

The thresholds themselves vary by more than an order of magnitude across destinations, from around 20 units in one place to 1000 in another, and tax often begins at a different point from duty. Checking which of the two tests your parcel fails is the difference between planning for a small line and being surprised by a large one.

1. Write down the threshold and the band for your category, with the date you read them, before the parcel ships.
2. Compare the landed value rather than the goods value, or the comparison flatters the parcel.
3. Treat a parcel sitting within a few units of a threshold as above it when you plan.

The three levers worth pulling, and the two that are folklore

Three levers reliably move a quote. Packed volume moves it whenever volume is the driver rather than mass. Shipment count moves it whenever the order is split. Mode moves it always, because the divisor and the rate both change with it.

Two levers are folklore in most cases. The first is asking for a declaration change to land a parcel in a nicer band, which is not a lever at all and creates a much larger problem than the line it avoids. The second is compressing soft goods: on this desk a vacuum-bag request changed the chargeable figure on none of five soft-goods parcels, for the plain reason that those parcels were already billed on what they weighed.

The test for any request is whether you can name the figure it should change and the line it appears on. If you can, send it. If you cannot, send it as a preference and expect nothing from it.

1. Volume lever: works when volume drives the figure, which you can check in one calculation.
2. Shipment lever: works when the order is split across more than one build, and it re-pays handling and border assessment.
3. Mode lever: always works, because it changes both the divisor and the rate at once.
4. Folklore: declarations invented for the band, and compression on parcels that were never volume-driven.

Before and after: the same order repriced

Take an order of five parcels with a combined chargeable weight of 14 kilograms. The cart-stage estimate assumed 8 kilograms because the seller shipping note said so. At the warehouse the measured volume came to 72 litres and the mode used a divisor of 6000, which implies 12 kilograms of volume weight; adding the remaining parcel volume brings the chargeable figure to 14.

The table below shows the same order on the three rungs using the published planning rates and per-parcel fees. All figures are on one scale, so the ratios matter and the units do not. The split from one shipment to two is the middle rung, and the five-shipment shape is the fast rung.

Two readings of the table are worth keeping. The handling line grows faster than the linehaul line as the shape gets faster, because it is charged per parcel rather than per kilo. And the lean rung is the only shape where a single slow seller holds the entire order, which is a schedule risk rather than a cost.

What to write down when the quote arrives higher

Write five things before you send a single message. The chargeable weight and the divisor that produced it. The linehaul rate that was applied. The shipment count and the per-parcel fee. The border band and threshold for your category. And the difference between the cart-stage estimate and the warehouse figure, expressed as a number rather than a feeling.

Those five items turn a complaint into a question that can be answered, and they also tell you whether the movement was a mistake or simply the estimate meeting reality. Most quotes that move are the second case, and the useful outcome of checking is knowing which line to change next time rather than winning an argument about this one.

1. Record the two weights and the divisor, or the weight comparison cannot be made.
2. Record the shipment count, because handling is the line that grows fastest when a shape gets faster.
3. Record the border threshold and band with the date, because bands get re-cut and old figures mislead.
4. Record one line you will change next time, chosen from volume, shipment count or mode.

The data point behind this note

Public source check, KB-2026-09: all eight destination entries were re-read on 2026-09-18 and every category rate is published as a band rather than a point — footwear runs from 0 to 48 at one destination and 6 to 30 at another — because the physical item decides the rate inside the band.

◇KB-2026-09· 2026-09-30 Batch ledger · Challenge a figure

Notes in the same cluster

Related entries and gauges

• What do you do when the quote looks wrong?
• Landed-cost ladder

  Three ways to move the same parcel, priced side by side.