A softer composite index can make August look cheaper than July even when the invoice goes the other way. The mismatch is not a mystery. Base ocean, emergency fuel, local charges, and duty sit in different rows — and only one of those rows is what Drewry or Shanghai publishes.
As of August 5, 2026. This is an operations guide for importers and logistics managers, not customs brokerage or legal advice. Use a duty percentage you already know from counsel or your broker. Palletizr’s landed-cost tools help you stack that percentage onto freight scenarios; they do not classify HTS codes.
The Trap in One Sentence
When operators say “rates are down,” they often mean a spot index. When accounts payable says “freight is up,” they often mean the all-in invoice. Both can be true in the same week.
Late July made that concrete: Drewry’s World Container Index could fall for a third consecutive week while carriers rolled Emergency Fuel Surcharges into August and forced-labor Section 301 duties stayed live after the July 24 handoff from the temporary Section 122 bridge. Soft boxes beside hard fuel and sticky duty is not a contradiction. It is a spreadsheet problem.
Five Lines Every Quote Should Separate
Ask your forwarder or carrier to show these as distinct lines before you accept a sailing as “cheaper”:
- Base ocean — FAK or contract rate for the lane and equipment type.
- Ordinary bunker / BAF — the standing fuel formula, not the emergency layer.
- Emergency Fuel Surcharge (EFS) — August notices vary by carrier; CMA CGM’s long-haul head-haul dry example sat near $150 per TEU from August 1 loading date on published advisories, while ONE’s mid-August revision used different amounts and dates. Confirm which rule applies to your booking.
- Local and accessorials — THC, documentation, security, chassis, demurrage exposure if relevant.
- Duty all-in — country-of-origin duty under the post–July 24 stack (for example forced-labor Section 301 bands of 10% / 12.5% on many economies, with separate country measures such as Brazil’s 25% where applicable). Use the rate your broker confirms.
If any line is missing, you are not comparing August to July. You are comparing a headline to a hope.
Soft Index vs Hard Invoice: A Worked Pattern
Suppose last week’s composite index fell 3%. That does not authorize you to cut the purchase order budget by 3%.
| Scenario | What moved | What you should do |
|---|---|---|
| Index −3%, EFS new | Fuel line added | Reprice all-in; index celebration may reverse |
| Index −3%, duty unchanged | Duty still on landed cost | Keep duty in the same workbook as freight |
| Index −3%, cube 55% | Empty space | Optimize load plan before booking another box |
| Index flat, Transpacific GRI holds | Lane-specific | Quote the lane, not the composite |
The right unit of comparison is all-in cost per usable cubic meter (or per selling unit), not dollars per forty-foot container on an index table.
Where Tariffs Hide
Duty does not appear on the ocean index. After July 24, 2026, importers who planned around a temporary global bridge had to re-map country-of-origin exposure under forced-labor Section 301 and related measures. Front-loading that supported earlier Transpacific strength slowed once those measures landed — which is part of why composite indices cooled even while some Shanghai U.S. lane quotes snapped higher in early August.
Packing denser containers does not change the duty rate. It can change how many containers you need and therefore how much freight and fuel you pay while duty stays sticky. Keep those levers mentally separate.
Where Bunker Hides
Ordinary BAF and emergency fuel are easy to blur on a one-line “freight” summary. Emergency language is designed for shock recovery outside the normal table. Loading-date rules, gate-in rules, and bill-of-lading rules differ by notice. A soft Thursday index print does not cancel a Friday EFS filing that attaches to your August gate-in.
A Practical Weekly Habit
- Paste the index you care about (Drewry composite, Shanghai lane, or both).
- Paste the carrier’s current EFS / BAF notice for that trade.
- Paste the duty percentage your broker confirmed for the SKU set.
- Run two load plans (dense vs loose) and compare all-in per cube.
That habit takes less time than arguing about whether “the market” is up or down.
Where Palletizr Fits
Palletizr helps you control the cube and weight plan inside the box so expensive sailings and sticky duty hit fewer containers. Use the calculator to compare packing scenarios; use a landed-cost worksheet to stack a known duty percentage — not to invent one.
Model denser loads at palletizr.com.