Rotterdam Bunker Quantity Versus Charging Quantity

Key takeaways

• Preserve the final delivered quantity as its own evidence item.
• Identify any minimum, fixed charge or other agreed pricing mechanism.
• Do not rewrite a delivery record to make it equal the invoice basis.
• Investigate quantity discrepancies separately from contract-price questions.

Rotterdam's measurement context

Rotterdam's port guidance introduces mandatory mass flow metering for specified bunker deliveries from January 2026. Port of Rotterdam MFM guidance

Check the current text and applicable scope for the proposed supply. The commercial desk should obtain the relevant final delivery evidence, while qualified parties handle measurement and operating questions. This article does not provide instructions for using or checking the equipment.

For a current transaction, the delivered-to-charged reconciliation is not provided; obtain current verified information. Record the documented delivered amount, agreed pricing basis and unresolved difference, with references to the actual order and invoice.

Ask what the invoice quantity represents

An invoice line may apply the delivered amount directly, use a stated minimum charging quantity or combine a fuel amount with a separate fixed service expense. Establish which mechanism the parties actually agreed before deciding that a difference is an error.

Do not assume a minimum exists merely because the invoice quantity is higher. Ask for the relevant agreed basis and review its applicability to the delivered purchase. Equally, do not delete a supported minimum from the model simply because the vessel received less.

The final delivery record should continue to show the reported physical supply. A pricing mechanism belongs in the commercial calculation, not as an unexplained alteration to that record.

Keep three quantities distinguishable

The nominated quantity is what the buyer requested on the agreed basis. The delivered quantity is what the final evidence records. The charging quantity, where separately defined, is the amount used under the agreed pricing mechanism.

They may be equal, but the reconciliation should not depend on that assumption. A revised vessel requirement or accepted variation can make them differ without identifying the contractual outcome by arithmetic alone.

Where the delivered quantity itself is questioned, preserve that issue separately. A discussion about a minimum charge should not distract from a genuine evidence discrepancy, and a measurement query should not automatically invalidate every unrelated invoice component.

A fictional minimum-charge calculation

The example assumes a specifically agreed minimum charging quantity. It does not describe a standard Rotterdam term or determine whether such a provision applies to an actual purchase.

ILLUSTRATIVE: The final delivery record shows 480 tonnes. The assumed agreement applies a minimum charging quantity of 500 tonnes at $620 per tonne. The resulting charge is $310,000: 500 × $620.

Applying the unit price only to the delivered quantity would produce $297,600: 480 × $620. The difference is $12,400, arising from the assumed pricing mechanism rather than an additional physical delivery.

The effective charge per delivered tonne is approximately $645.83: $310,000 divided by 480. The delivery record remains 480 tonnes throughout this commercial calculation.

The effective figure helps the buyer compare complete costs, but it should not replace the agreed unit price or suggest the supplier changed that price. Each number answers a different question.

Use a reconciliation table with separate evidence lines

The table identifies whether a query concerns delivery evidence or commercial terms.

Fictional case: the invoice is queried for the wrong reason

A fictional Rotterdam buyer receives less than its original nominated quantity after an authorised requirement change. The supplier invoices under a minimum provision that the buyer's first worksheet omitted.

The reviewer initially treats the difference as an overstatement of delivered fuel. Examination of the agreement shows that the invoice and delivery record refer to different bases. The team checks whether the provision applies to the amended purchase and documents the resulting decision.

It does not change the delivery note to match the invoice. Any question about the physical quantity remains a separate evidence review, while the price issue is resolved through the actual agreed terms.

Improve the next enquiry using the result

Where a minimum materially increases effective cost, make it visible in future quote comparisons at the expected quantity. A low nominal unit price can be less attractive for a smaller requirement once the complete charging mechanism is applied.

Ask suppliers to state such conditions clearly before ordering. The lesson from reconciliation should improve procurement, rather than merely explain an unexpected invoice after the call has ended.

Common mistakes

Do not force delivered and charged quantities into one field. Other errors include inventing a minimum after delivery, omitting an agreed provision from the comparison and describing an effective cost as a changed unit price. A commercial calculation cannot establish the cause of a separate measurement discrepancy.

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