Laytime and demurrage calculation in Kuwait starts with a clock you may already have lost. Kuwait's Maritime Trade Law (Decree-Law No. 28 of 1980) prescribes claims arising out of a contract of carriage after one year, and most charterparties bolt on a far shorter documentary time bar - commonly 90 days from completion of discharge, with the claim void if the supporting papers are not served inside it. So the first number that matters is not the demurrage rate. It is the date discharge finished at Shuaiba.

Start with the time bar, not the rate

Two deadlines run against every Kuwait demurrage claim. The statutory one comes from the Maritime Trade Law (Decree-Law No. 28 of 1980), which prescribes claims arising out of a contract of carriage after one year. The contractual one comes from your own fixture: a demurrage time bar clause of 60 or 90 days from completion of discharge, requiring the calculation and every supporting document to be served inside that window or the claim is barred absolutely - no discretion, no extension. Check the recap before you check the stopwatch. If you are inside 30 days of the bar, assemble documents first and argue the arithmetic later, because a fully documented claim served on day 88 beats a perfect calculation served on day 91. Kuwaiti counsel should confirm the exact bar on your charterparty wording; the figures below assume a 90-day documentary bar.

A worked Shuaiba fixture

Laytime is the period the charterer has to load or discharge without extra payment, and demurrage begins the minute it runs out. Take a geared bulk carrier discharging 24,500 MT of bagged cement at Shuaiba, fixed at 2,500 MT per weather working day SHINC, 12 hours turn time, demurrage 18,000 US dollars per day pro rata.

  • Laytime allowed: 24,500 divided by 2,500 = 9.8 days, which is 9 days 19 hours 12 minutes.
  • NOR tendered and accepted 06:00 on 4 October, so with 12 hours turn time laytime commences 18:00 on 4 October.
  • Laytime expires 13:12 on 14 October.
  • Discharge completed 09:30 on 17 October.
  • Time on demurrage: 2 days 20 hours 18 minutes.
  • Demurrage due: 51,225 US dollars, roughly KWD 15,700 at an exchange rate near 0.307.

Charterers will try to knock out the 14 hours of rain stoppage on 15 and 16 October. They cannot, unless the charterparty expressly says so: once the vessel is on demurrage, the weather exceptions in the laytime clause stop applying. At 750 dollars an hour, that single principle is worth 10,500 dollars on this one fixture.

The three documents the claim lives on

A demurrage claim in Kuwait is an evidence exercise, not an argument. Three documents carry it:

  • The statement of facts signed by the master and the terminal or agent, showing NOR tender, NOR acceptance, berthing and completion of discharge to the minute.
  • The discharge log or tally sheets listing every stoppage with its stated cause, plus any letters of protest issued at the time.
  • The signed charterparty or fixture recap carrying the laytime terms, the demurrage rate, the exceptions and the time bar clause you are working to.

If one of the three is missing, chase it before day 60. Terminals and agents in Kuwait answer a request for a countersigned SOF far more slowly than your time bar runs. A standing demurrage claim desk exists precisely because this collection work, not the arithmetic, is where owners lose money.

Where the calculation usually goes wrong

Four mistakes account for most rejected claims. Tendering NOR before the vessel is an arrived ship, or before free pratique and customs clearance, which can invalidate it outright. Mixing SHINC and SHEX terms across load and discharge ports in a single statement. Starting the clock at berthing instead of at NOR plus turn time. And netting off shifting time that the charterparty actually puts on owners. Because demurrage is liquidated damages, you are not proving loss at all - you are proving elapsed time against an agreed rate, so every disputed minute needs a document standing behind it.

Automating the arithmetic

Everything above is ten minutes of maths wrapped in three weeks of chasing PDFs, which makes it an automation problem rather than a legal one. We build document-reading agents that take a scanned SOF, pull NOR time, berthing, each stoppage and completion into a structured timeline, apply the laytime terms from the recap, and output the claim statement plus a document checklist with the time bar date on top. The engineering is not exotic: it is the same pattern behind our factory timesheet, wages and budget system, where signed paper time records had to become defensible money figures. If you are scoping that kind of build, our AI studio page sets out how we work, and read what an app development contract in Kuwait should say first, because ownership of the extracted data matters more than which model reads the page.