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ONE Demurrage & Detention Calculator

Recompute ONE D&D invoices: free time, tiered daily rates and per-container totals with an editable tariff.

Tariff tiers (editable — paste your carrier's rates)
Tier 1days @$/day
Tier 2days @$/day
Tier 3days @$/day

Set a tier's days to 0 to mean “all remaining days”.

Defaults approximate a common ONE import structure — pull the exact brackets from ONE's published per-country D&D tariff for your trade lane and equipment type.

$1,140
total for 1 container · 6 chargeable days
Free time used4 of 4 days
Tier 1 (3d @ $150/day)3d → $450
Tier 2 (4d @ $230/day)3d → $690

With your numbers: 10 days − 4 free = 6 chargeable days = 3×$150 + 3×$230 = $1,140 per container.

Sources & references

  • ONE — published demurrage & detention tariff (per country/trade)
  • FMC 46 CFR Part 541 billing requirements (US trades)

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.

Auditing a ONE demurrage or detention invoice starts with one question: do the free days and tier rates on the bill match the filed tariff for your country and equipment type? ONE — Ocean Network Express — the Japanese alliance carrier formed in 2018 from NYK, MOL and K-Line's container arms — publishes those tariffs; this tool recomputes the math once you've pulled the right column.

About ONE Demurrage & Detention Calculator

ONE's eCommerce portal exposes D&D tariff lookups per origin/destination pair, making invoice audits unusually checkable. Operational details like this are why carrier-specific calculators beat generic ones: the failure modes differ line by line. Defaults model a typical import scenario (4 free days, 10-day dwell, tiers of $150×3d, $230×4d, $325+). Edit everything. The per-tier breakdown is intentionally formatted like a carrier billing line so a mismatch jumps out — and a mismatch, documented, is a dispute with a number on it.

How to use ONE Demurrage & Detention Calculator

  1. 1Enter days on the d&d clock and how many containers are affected.
  2. 2Set your free days and edit the tariff tiers to match the published tariff or your contract — every figure is editable.
  3. 3Read the per-tier breakdown and the worked example showing exactly how the total is built, day by day.
  4. 4Change the inputs to compare scenarios (pick up now vs later) before the charges harden into an invoice.

Why use ONE Demurrage & Detention 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

Where do I find ONE's official D&D tariff?+

On ONE's website under demurrage & detention (filed per country and direction, usually with effective dates). Use the document in force on your container's discharge date and the column matching your equipment type — then enter those free days and brackets here to recompute the invoice exactly.

What would 10 days on the clock cost with ONE-typical rates?+

With the preloaded example (4 free days, then $150 for 3d, $230 for 4d, $325 after): 6 chargeable days = 3 × $150 + 3 × $230 = $1,140 per container. Treat it as a calibration point, not a quote — your filed tariff governs.

Where do I verify ONE's exact D&D rates?+

ONE's website has a per-country detention & demurrage tariff lookup — select the trade and country and the brackets appear with effective dates. Because effective dates are shown, check the tariff version in force on your container's discharge date, not today's: rate changes mid-dwell are applied from their effective date, a detail worth auditing.

Can I negotiate free time with ONE?+

Yes — service contracts and even spot bookings can carry extended free time, and it's almost always cheaper than paying tariff-rate D&D. Volume, lane balance and equipment turn speed are your leverage. Price the ask first: this calculator shows what your historical dwell pattern costs at tariff rates, which is exactly the number to bring to the negotiation.

Embed ONE Demurrage & Detention Calculator on your website

Want ONE Demurrage & Detention 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.

Embed code
<iframe src="https://tooljolt.com/tools/one-demurrage-detention-calculator" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="ONE Demurrage & Detention Calculator — ToolJolt" loading="lazy"></iframe>

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