Open Top Container Demurrage Calculator
Price open top container dwell with special-equipment free time and tier rates — shorter clocks, steeper brackets.
Set a tier's days to 0 to mean “all remaining days”.
Special-equipment tariffs apply — read the Open Top Container column of your carrier's D&D schedule, not the standard dry-box column.
With your numbers: 8 days − 3 free = 5 chargeable days = 4×$210 + 1×$330 = $1,170 per container.
Sources & references
- Carrier special-equipment D&D tariff columns (per country/trade)
- Container Owners Association — special equipment operations notes
Demurrage, detention and storage tariffs are set by each carrier, terminal and contract and change frequently. The preloaded figures are editable industry-typical examples, not quotes — always verify against the current published tariff or your service contract before paying or disputing an invoice.
Demurrage on a open top container plays by harsher rules than the dry boxes around it. The unit is an open-roofed box for over-height cargo loaded by crane through the top; Open tops are scarce specials: carriers keep small fleets, so the per-diem side is priced to force fast turns — and a tarp-and-bows set gone missing at return triggers equipment damage charges that dwarf a day of demurrage. Model the cost here before the terminal does: free days, tiered rates, days on dock.
About Open Top Container Demurrage Calculator
Defaults reflect special-equipment reality (3 free days — shorter than dry — then $210 ×4d, $330+). A 8-day dwell totals $1,170 per unit (4 × $210 + 1 × $330). Edit every field from your carrier's special-equipment tariff column. Audit invoices with the equipment code from the B/L in hand: billing a special at dry rates is rare, but billing dry boxes at special rates (or applying the special's shorter free time to a dry box on the same bill) happens — mixed shipments are where these errors hide.
How to use Open Top Container Demurrage Calculator
- 1Enter days since discharge and how many containers are affected.
- 2Set your free days and edit the tariff tiers to match the published tariff or your contract — every figure is editable.
- 3Read the per-tier breakdown and the worked example showing exactly how the total is built, day by day.
- 4Change the inputs to compare scenarios (pick up now vs later) before the charges harden into an invoice.
Why use Open Top Container Demurrage Calculator?
- ✓Per-tier breakdown mirrors how carrier and terminal billing systems itemise invoices
- ✓Every figure — free time, tier days, rates — is editable to match any published tariff
- ✓Instant what-if comparisons before charges harden into an invoice
- ✓Free and private — all math runs in your browser
Frequently asked questions
How much free time does a open top container usually get?+
Less than dry boxes: 3 days is typical where dry cargo might get 4–7, because the equipment is scarcer and (for powered or OOG units) its yard slot is more expensive to provide. Service contracts can extend it — worth negotiating if you regularly ship this equipment type.
What does a 8-day dwell cost on a open top container?+
With the example tariff (3 free, then $210 for 4d, $330 after): 5 chargeable days = 4 × $210 + 1 × $330 = $1,170. Special-equipment brackets vary more between carriers than dry rates do — recompute with your actual column.
Why did my open-top detention exceed the demurrage?+
Special equipment per-diem is deliberately steep — the carrier's open-top fleet is small and a slow return strands the next over-height booking. Return the unit complete (tarps, bows, lashing points intact) and photograph it at handback; missing fittings get billed as damage on top of the per-diem days.
Can special-equipment charges be negotiated down?+
Yes, with the same leverage as anything else: volume and predictability. Regular project shippers negotiate special-equipment free time and capped per-diem into contracts. After the fact, your strongest card is carrier-side causation — late availability, refused returns, missing fittings on their depot's side — documented with dates.
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Want Open Top Container Demurrage Calculatoron your own site? Paste this snippet into any HTML page — it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.
<iframe src="https://tooljolt.com/tools/open-top-demurrage-calculator" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="Open Top Container Demurrage Calculator — ToolJolt" loading="lazy"></iframe>Related tools
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