Blended emissions surcharge: why one line means you can no longer check

One line on the invoice: "emissions surcharge". The amount is clear. What is in it is not.

Why carriers merge

The reason is understandable. Two regulations, two calculations, two tariff cycles. One line is simpler both for the carrier and for most clients, who look at the final amount anyway.

The problem only appears when someone wants to check.

What is lost

The only independently checkable part of an emissions surcharge is the geographic scope: whether 50% or 100% was applied to the voyage. That rule is set in law.

But it applies to emissions, not to an amount. To be able to check it, you need to know which part of the amount belongs to which regulation — because their cost logic differs.

In a merged line that is not visible. And with it goes the ability to check the line against the carrier's own published tariff, because those are published separately.

The name is not enough

It would be convenient to decide by the name of the line. Unfortunately, that does not work.

Checking real carrier tariffs shows that Maersk's "Emissions Surcharge" (EMS/ESS) covers both regulations, Hapag-Lloyd also merges them, and ONE's "Europe Environment Surcharge" (EES) — only the ETS. The same generic words, different content.

That is why a line from a carrier we do not yet have on our list is correctly marked unclear, not merged. "We do not know whether it is merged" is not the same as "it is merged", and it puts a different question to the carrier.

Why we do not split by guesswork

An assumption could be made — for example, that the ETS makes up the larger part and FuelEU the rest. On some routes that would even be roughly right.

But the proportion depends on the carrier's compliance strategy. Whether it bought allowances on the market, joined a pool, or used alternative fuel — each option gives a different cost ratio, and none of that is visible on the invoice.

A result obtained by guesswork would look well-founded. That is worse than no result at all, because it would be relied on in a dispute.

What to do instead

Ask the carrier for the split.

It is a legitimate request, it costs nothing, and in most cases the carrier has the data — it is required to hold it itself. Once the split is provided, the line becomes checkable again.

A practical tip: write the requirement for a split into the contract for the next period. Then the question stops coming up every month.

The third layer

From July 2026 the UK Emissions Trading Scheme is added on United Kingdom routes.

That means invoices may carry three environmental surcharges. If they are merged into one, verifiability loses one more degree.