Working out whether consolidation pays for itself

Consolidation saving by combined weight, showing where it reaches zero at the tier boundary. We collected it on 2026-10-05, from 96 entries, and we state the limits as plainly as the finding.

Across the eleven agents we checked, fee models fall into three shapes — percentage, tiered and flat. Which one is cheapest depends on your order size, and the difference at $150 is larger than the difference between lanes.

Free storage windows run from 30 to 90 days, and the clock start differs: warehouse check-in at some agents, purchase at others. That difference is worth about a week, which matters more than the window length at the margin.

Published fee table

Whether the model is readable without opening a ticket.

Storage clock start

Check-in or purchase — a week of difference.

Consolidation policy

Whether it is offered, and whether it restarts the packing clock.

Claims documentation

Whether compensation terms are published rather than quoted on request.

Sensitivity is unevenly distributed. Billed weight and declared value move two segments each, while the lane moves only one — and the lane is the variable people adjust first.

• Billed weight moves freight, and only freight — but by a full band.
• Declared value moves duty and the compensation ceiling together.
• Item value moves the service fee, and only under a percentage model.
• Lane moves freight and transit; it does not move duty at all.

Take a mid (0.8–2 kg) parcel on US express at $9.20–$15.10 of freight. A packing change that removes 0.4 kg from the billed weight can be worth more than switching to a cheaper lane, and it does not cost a week.

Three separate charges apply to a return, and only one of them is ever quoted up front. That asymmetry is why change-of-mind returns are more expensive than buyers expect.

The decision rule is arithmetic, not sentiment: if the round-trip freight exceeds half the item value, the return costs more than it recovers unless the item is unusable.

• Check whether the defect is confirmed by the warehouse or only suspected.
• Check the return window — most run 7 to 14 days from delivery.
• Check whether the category accepts returns at all.
• Check whether the item is worth more than the round-trip freight.

Volumetric weight is volume divided by a divisor, usually 5000. In the mid (0.8–2 kg) band the packed dimensions typically decide the bill rather than the scale, which is why an estimate built from item weight alone is a lower bound rather than a quote.

Rehearsal exists precisely for this. It packs the parcel before the international payment so the freight can be quoted on the packed dimensions — and it is the stage where estimates most often change.

• Ask for packed dimensions, not item dimensions.
• Request compression where the category tolerates it.
• Check the volumetric weight before paying, not after.
• Remove one bulky item rather than changing lane when a parcel sits on a boundary.

Comparing calculators by their outputs flatters all of them. Comparing them by their omissions is what tells you which number to trust.

The common omission is the volumetric step, and the more dangerous version is applying it silently. A silent application produces a number nobody can reproduce, which is worse than an obvious omission.

1. Enter a parcel with high volume and low weight.
2. If freight does not change, the volumetric step is absent.
3. Then change only the declared value.
4. If the total does not change, duty is not modelled.

The census splits the bill into item value, domestic delivery, service fee, international freight, duty and insurance. On a accessories order the item averages $64.14, and the five remaining segments together span $7.50 to $74.40.

The narrow segments — domestic delivery and insurance — are not worth optimising. Together they rarely exceed 4% of the total, and both are largely fixed once the weight band and the declared value are set.

Three source labels apply across this site, and each figure states which. Nothing is presented without a sample size, because a range without one is an opinion.

Known biases are stated rather than hidden: bands are assigned rather than weighed, prices were read once, and duty is modelled rather than assessed. Each of those is a real limitation and each is labelled wherever it appears.

Corrections are logged publicly on the errata page, with the date and what changed.

Lane choice looks like a speed decision and is really a step-function decision. For a mid (0.8–2 kg) parcel, US express sits at $11.40–$17.20 at 1.5 kg, against $6.40–$10.80 on UK standard.

The lanes differ by about 20% at the same weight, which is less than one tariff step. Changing lane to save money is usually the wrong lever: changing billed weight is the right one.

• US express: $11.40–$78.40 across the full weight range, median 11 days.
• Under 3 kg, express is usually worth it; above 5 kg it rarely is.
• Above 9–10 kg the question becomes parcel count rather than lane.

A US express order reaches the door in a median of 11 days and a p90 of 21. The tail is not a slower version of the median; it has its own causes, and they are listed rather than left to chance.

Last-mile delivery accounts for the largest single block — five of 11 median days. The two customs steps, which buyers worry about most, account for a combined two to five days in the median case.

Holiday closures

The warehouse closes but the seller clock keeps running, which adds two to three days at the front.

Battery or liquid declaration

A different export route, adding two to four days.

Address failure

A failed delivery attempt adds two days and sometimes a redelivery fee.

Peak season priority loss

The economy lane loses queue position from late October.