Off-hire in shipping determines when a time charterer can stop paying hire because a qualifying event has prevented or reduced the vessel’s contractual service and caused relevant loss of time. It is one of the most commercially important provisions in a time charter — and one of the easiest to misunderstand.
A vessel can be delayed without being off-hire. A machinery defect can exist without producing the same deduction under every charterparty. A ship can also return to hire before every commercial consequence of the original incident has disappeared.
The result depends first on the actual off-hire clause, then on the event, the service required from the vessel, the time actually lost and the evidence available to establish the claim.
A vessel does not go off-hire simply because something went wrong.
The commercial question is whether the event falls within the charterparty wording and produces the contractual effect required by that wording.
What Does Off-Hire Mean in Shipping?
Under a conventional time charter, the charterer pays hire for the commercial use of the vessel from delivery until redelivery, subject to the charterparty.
The owner retains possession of the vessel through the Master and crew and remains responsible for technical management, maintenance and the vessel’s physical operation. The charterer directs the vessel’s commercial employment within the contractual limits.
Tide Signal’s Types of Charter Parties in Shipping explains how voyage, time, bareboat, COA and sub-charter structures allocate vessel time, costs and commercial risk.
For a direct comparison between the two most common structures, see Voyage Charter vs Time Charter .
Off-hire is the contractual mechanism that can suspend or reduce the charterer’s obligation to pay hire when the agreed requirements are satisfied.
That does not necessarily mean that the owner has breached the charterparty.
An event can place a vessel off-hire even where it was accidental and did not arise from owner fault, depending on the wording of the contract.
Off-Hire Is Not Laytime or Demurrage
The charterer normally pays for vessel time. The off-hire clause determines when qualifying lost time can interrupt that payment obligation.
Cargo-operation time is measured under a separate laytime regime, with demurrage potentially arising after the contractual allowance is exhausted.
The distinction matters because a time charterer can remain liable for hire while a vessel waits in port, whereas a voyage charter may allocate the same period through laytime and demurrage rules.
For the voyage-charter mechanism, read Laytime and Demurrage in Shipping .
The Starting Rule: Time Charter Hire Normally Continues
The commercial starting point is straightforward: hire normally continues while the vessel remains on hire.
A charterer seeking a deduction therefore needs to identify the contractual basis for stopping or reducing hire.
This is why an off-hire review should not begin with:
It should begin with:
Similar operational events can produce different commercial results under different forms, recaps and rider clauses.
NYPE Off-Hire: Why the Exact Clause Matters
The New York Produce Exchange form, or NYPE, is the standard time-charter form most closely associated with dry-bulk trading.
NYPE wording is frequently amended during negotiations. Recap terms and rider clauses may therefore alter the printed form substantially.
A proper review should read:
- the fixture recap;
- the standard form;
- all rider clauses;
- incorporated clauses;
- specific performance provisions;
- dry-docking provisions;
- detention or arrest riders;
- cargo-gear clauses; and
- any bespoke off-hire amendments.
The Off-Hire Test: Five Questions to Ask
Common Off-Hire Events
Standard and amended time charter forms can identify a range of events capable of triggering off-hire.
Typical disputes involve machinery, cargo gear, crew availability, vessel damage, detention, grounding and dry-docking.
| Event | Possible Off-Hire Issue | What Still Needs to Be Checked |
|---|---|---|
| Main-engine breakdown | Vessel may be unable to proceed or maintain the required service. | Clause wording, causation, duration and actual time lost. |
| Auxiliary machinery failure | Can affect propulsion, cargo operations or required onboard systems. | Whether the failure actually interfered with the service required. |
| Cargo-crane breakdown | May slow or prevent loading or discharge. | Net loss of time, period wording or express pro-rata cargo-gear terms. |
| Crew deficiency | Lack or unavailability of crew may prevent an operation. | Cause, duration and exact contractual wording. |
| Hull or equipment damage | Damage may prevent the vessel performing the service required. | When the vessel became capable of performing that service again. |
| Grounding | Vessel may lose time through refloating, inspection or repairs. | Cause, responsibility and specific clause wording. |
| Dry-docking | Vessel may be removed from commercial service. | Dry-dock clause, allowed positioning and resumption point. |
| Detention or arrest | Vessel may be physically capable but legally unable to trade. | Cause, party responsible and whether the relevant event is covered. |
What Is the Service Immediately Required From the Vessel?
This is one of the most important practical questions in an off-hire dispute.
A vessel can have a defect without that defect preventing the service required at that moment.
If the ship is ordered to sail, propulsion efficiency may be critical.
If she is alongside discharging, cargo cranes or pumps may be the relevant service.
If she is waiting outside port because no berth is available, a machinery defect that has no effect on the current waiting period may produce a different time-loss analysis.
Delay Does Not Automatically Mean Off-Hire
One of the most common commercial mistakes is to see a delay and immediately search for a hire deduction.
A vessel can remain fully on hire while delayed.
Examples may include:
- ordinary berth congestion while the vessel remains efficient;
- cargo not being ready;
- waiting resulting from charterers’ employment orders;
- market or scheduling delay;
- weather delay where no relevant off-hire wording applies; and
- external port restrictions that do not satisfy the contractual test.
Tide Signal’s Port Delays in Shipping explains how waiting time can become a major commercial cost even when the vessel remains operational.
Net Loss of Time vs Period Off-Hire
This distinction can materially change the amount of hire deductible.
| Point | Net Loss of Time | Period Off-Hire |
|---|---|---|
| Core question | How much relevant time was actually lost because of the qualifying event? | Did a contractual off-hire period begin and when did it end? |
| Commercial effect | Deduction focuses on actual qualifying lost time. | The contract may suspend hire for the defined period. |
| Evidence focus | Causation and actual delay. | Start and end of the contractual period. |
| Typical dispute | How much longer did the required service actually take? | When did the relevant incapacity begin and cease? |
This is particularly important in cargo-gear disputes, where the physical duration of a crane breakdown may be very different from the actual time lost in completing cargo operations.
How Is Off-Hire Calculated?
Once the qualifying period has been established under the charterparty, the arithmetic itself is usually straightforward.
Off-Hire Deduction = Daily Hire × Qualifying Hours ÷ 24
The difficult part is not multiplying the numbers. It is establishing the correct number of deductible hours.
Eight hours of qualifying main-engine breakdown
Assume a vessel is fixed at $30,000/day.
Her main engine stops and the applicable clause permits deduction of 8 hours of lost service.
The calculation is simple. Establishing whether all eight hours satisfy the charterparty is the real commercial work.
Five and a half hours at $36,000/day
This simplified method should not override any special rider dealing with equipment failure, minimum periods, bunkers, repositioning or other costs.
Crane Breakdown: Why 25% Equipment Failure Does Not Always Mean 25% Off-Hire
One crane out of four becomes unavailable
A geared bulk carrier has four cargo cranes. One crane stops working for twelve hours during discharge.
It may appear logical to deduct 25% of hire for twelve hours.
But that is not a universal rule.
If the charterparty contains an express proportional cargo-gear clause, the agreed formula may apply.
Under a net loss of time analysis, however, the relevant question may be how much additional cargo-operation time was actually caused by the failed crane.
If the remaining equipment completed discharge at the same time the vessel would otherwise have completed, the result can be very different.
Port Congestion: A Classic Delay That Is Not Automatically Off-Hire
Thirty-six hours waiting for berth
The vessel reaches the port fully operational, properly crewed and capable of performing the charterer’s orders.
She waits 36 hours because the berth is occupied.
Commercial time has clearly been lost.
But ordinary congestion does not automatically place the vessel off-hire simply because the charterer would prefer not to pay for the waiting period.
Where the same port call later develops into a voyage-charter laytime issue downstream, different contractual clocks may operate simultaneously.
Can a Vessel Be Partially Off-Hire?
Some incidents reduce vessel capability without stopping the ship completely.
Examples include:
- one cargo crane unavailable;
- reduced pumping capacity;
- restricted propulsion capability;
- partial electrical failure;
- reduced cargo-handling capability; or
- another defect causing partial rather than complete loss of service.
Whether the commercial consequence is proportional hire reduction, actual net time loss or another calculation depends on the charterparty.
Off-Hire vs Speed and Consumption Claims
A vessel performing below a contractual speed warranty does not automatically become off-hire.
Speed and consumption claims normally operate under separate performance provisions involving:
For the chartering mechanics, see Tide Signal’s speed and consumption claims.
- contractual speed;
- fuel consumption;
- good-weather criteria;
- current and swell;
- voyage evidence;
- weather-routing data;
- hull condition;
- engine condition; and
- the relevant damages methodology.
The same machinery problem can potentially affect both performance and off-hire, but the two mechanisms should not be merged without analysing each clause separately.
Off-Hire During Dry-Docking
Dry-docking can remove the vessel from commercial employment for a substantial period and therefore deserves separate analysis.
The desk should check:
- whether the docking is scheduled or unscheduled;
- whether the charter expressly permits a docking window;
- the permitted docking location;
- whether deviation or positioning time is addressed;
- when hire stops;
- when hire resumes;
- how bunkers are treated;
- who pays port and docking-related voyage expenses; and
- whether the vessel must return to a particular geographical position before hire resumes.
Detention, Arrest and Authority Delays
Detention disputes can be difficult because the vessel may remain physically capable of working while being legally prevented from trading.
The reason for the detention matters.
The analysis should identify:
- which authority or claimant stopped the vessel;
- why the intervention occurred;
- whether the cause falls within the off-hire wording;
- whether separate detention or arrest riders apply;
- whether owner or charterer conduct caused the problem;
- whether sanctions or regulatory restrictions are involved; and
- what vessel service was actually prevented.
Does Off-Hire Stop Every Charterer Cost?
No.
Stopping hire does not automatically mean every charterer obligation or voyage expense transfers to the owner.
Bunkers, port expenses, canal costs, agency, extra insurance and other expenditure may be governed by separate clauses.
Hire is one contractual payment stream.
Other costs need their own contractual analysis.
Can Charterers Deduct Future Off-Hire From Advance Hire?
Time-charter hire is frequently paid in advance.
That can create a practical problem when a technical incident is expected to keep the vessel unavailable beyond the next hire payment date.
A period of off-hire that has already occurred is commercially different from an anticipated period that has not yet happened.
Because an incorrect hire deduction can itself trigger a payment dispute, charterers should check the actual hire-payment clause and governing law before reducing a future instalment.
Off-Hire vs Damages for Breach
Off-hire and damages are separate contractual mechanisms.
Off-hire asks:
A damages claim asks different questions, including whether a contractual obligation was breached and what recoverable loss resulted.
This means:
- an event can potentially trigger off-hire without requiring owner fault;
- failure to establish off-hire does not automatically prove that no other contractual claim exists; and
- an off-hire deduction does not necessarily resolve every other financial consequence of the same incident.
Off-Hire and the Head Charter / Sub-Charter Mismatch
This is where off-hire becomes especially important for operators.
A disponent owner may have a vessel in under a time charter and employ her downstream under a voyage charter.
Registered Owner → Time Charter → Operator → Voyage Charter → Cargo Charterer
The operator sits between two contracts that may allocate vessel time completely differently.
A vessel may remain on hire under the head time charter while laytime is suspended under the voyage sub-charter.
The operator can therefore continue paying hire upstream while being unable to recover equivalent time downstream.
The opposite can also occur.
This contractual basis risk is one of the reasons professional operators track the head and sub-charter separately rather than treating the vessel’s commercial chain as one agreement.
For the wider structure, see Types of Charter Parties in Shipping .
How Off-Hire Changes Voyage Economics
For a time charterer, daily hire is one of the largest direct costs of controlling the ship.
A valid off-hire deduction therefore changes the cost base of the employment.
40-day employment at $25,000/day
Assume 24 hours are ultimately established as valid off-hire.
That still does not produce the full voyage result.
The charterer must separately account for:
- bunkers;
- port costs;
- canal dues;
- commissions;
- freight revenue;
- waiting time;
- additional voyage expenses; and
- the final duration of the employment.
Tide Signal’s Voyage Estimation explains how freight, voyage costs, time and TCE fit together commercially.
What Evidence Is Needed for an Off-Hire Claim?
The charterparty supplies the contractual test.
The vessel and shore records establish the facts.
Where the incident occurs during a port call, Tide Signal’s Statement of Facts in Shipping explains how contemporaneous port-call events should be recorded.
When Does the Vessel Come Back On Hire?
The end of a technical incident and the end of its commercial consequences are not always the same moment.
Depending on the clause, the desk may need to establish when:
- the repair was completed;
- machinery became operational;
- cargo gear was restored;
- crew deficiency ended;
- detention was lifted;
- a required survey was passed;
- the vessel became capable of performing the service required; or
- another expressly agreed contractual condition was satisfied.
The vessel can sometimes return on hire even though its wider schedule remains disrupted.
Common Off-Hire Mistakes
- Assuming every delay is off-hire. Delay and off-hire are not synonyms.
- Reading only the standard form. Recaps and rider clauses can materially change the test.
- Ignoring the service required. A defect only matters to the extent required by the contractual mechanism.
- Confusing net loss with period off-hire. The calculation can be fundamentally different.
- Applying a pro-rata crane deduction automatically. One failed crane out of four does not necessarily equal 25% off-hire.
- Stopping every charterer cost. Hire and voyage expenses can follow different clauses.
- Confusing performance claims with off-hire. Speed and consumption are separate contractual mechanisms.
- Ignoring competing causes. More than one event may be affecting the vessel at the same time.
- Using poor timestamps. Rounded or inconsistent records weaken the claim.
- Deducting advance hire too quickly. A wrongful deduction can create a separate hire-payment dispute.
Off-Hire Checklist for Operators and Charterers
Off-hire is ultimately a question of who carries vessel-time risk when the ship cannot deliver the service the charterer bought.
The strongest analysis starts with the contract, reconstructs the operational facts and deducts only the time that the agreed wording transfers away from the charterer.
Related Tide Signal Chartering Analysis
Off-Hire in Shipping: Frequently Asked Questions
What is off-hire in shipping?
Off-hire is a time-charter mechanism under which hire can stop or be reduced when an event covered by the charterparty satisfies the agreed contractual conditions.
Does every vessel delay mean the ship is off-hire?
No. A vessel can remain fully on hire while delayed. The reason for the delay and the wording of the charterparty determine the result.
Who normally has to establish that the vessel is off-hire?
The charterer relying on the off-hire provision generally needs to establish that the contractual requirements have been satisfied, subject to the governing law and wording of the individual charterparty.
What is a net loss of time clause?
It is an off-hire mechanism focused on the relevant time actually lost because of the qualifying event rather than automatically deducting the entire period during which a defect existed.
What is period off-hire?
A period clause operates by identifying the contractual period during which hire is suspended. Its effect can differ materially from a net loss of time provision.
Is machinery breakdown automatically off-hire?
No. Machinery failure is a common off-hire issue, but the event must still satisfy the relevant charterparty wording and applicable time-loss test.
Is port congestion off-hire?
Ordinary congestion does not automatically place a vessel off-hire merely because she is waiting. The vessel may remain fully efficient and on hire.
Can a crane breakdown place a ship off-hire?
Yes, depending on the charterparty. The calculation may depend on actual time lost or on a specific proportional cargo-gear clause.
Does off-hire stop every vessel expense?
No. Hire, bunkers, port charges and other voyage expenses may be governed by separate provisions.
How do you calculate off-hire?
Where a simple time deduction applies, daily hire can be multiplied by the qualifying off-hire hours and divided by 24. The difficult part is establishing the correct qualifying period under the contract.
Is off-hire the same as demurrage?
No. Off-hire belongs primarily to time charter. Laytime and demurrage are voyage-charter mechanisms governing cargo-operation time.
Is off-hire the same as a speed and consumption claim?
No. Vessel-performance claims and off-hire are separate contractual mechanisms, although the same machinery problem can sometimes affect both.
When does a vessel return on hire?
The answer depends on the charterparty. The relevant point may be when the vessel regains the ability to perform the service required, rather than when every downstream commercial consequence of the incident has disappeared.
