# Maersk demurrage and detention in the US: tariff, free time and last free day calculator

This page shows what we hold of the Maersk US demurrage and detention tariff and links to the carrier's own document. Free days and rates are not copied here; the calculator applies the published tariff to your dates.


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## Before you pay

Compare the invoice with the tariff and with the contract. If the free time or the daily rate does not match, or the invoice leaves out what the FMC requires:

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{{< linkrow >}}[What a US invoice must show and how to dispute it](../dispute/){{< /linkrow >}}



Canonical: https://purserhouse.com/en/demurrage/maersk/us/