A fixture can look attractive when viewed only through the freight rate.
The cargo quantity is substantial, the rate is above the previous fixture and the gross freight appears strong. The commercial team may therefore conclude that the voyage will produce a healthy return.
But freight is revenue—not profit.
Under a voyage charter, the owner generally pays the vessel’s fuel and operating expenses and usually bears the relevant port disbursements. Voyage-specific costs can include bunkers, port charges, canal dues, stevedoring where applicable, war-risk premiums, taxes and other expenses.
The quality of a fixture can only be judged after these costs and the total employment period have been examined.
Gross Freight Creates the First Illusion
Gross freight is calculated from the agreed cargo quantity and freight rate, or from the negotiated lump-sum amount.
It is an important figure, but it does not reveal how efficiently the ship will earn that revenue.
Two voyages producing identical gross freight can deliver completely different returns.
One vessel may already be positioned near the loading port, complete the voyage quickly and consume relatively little fuel. Another may require a long ballast passage, face congestion and burn expensive bunkers before earning the same freight.
The commercial value of the fixture therefore depends on both money and time.
TCE Provides the Better Comparison
The Time Charter Equivalent, or TCE, converts the voyage result into an estimated daily return.
The Baltic Exchange calculates tanker voyage TCE by deducting fuel and voyage costs from gross freight and dividing the result by the total voyage duration. Its published values are expressed as net daily figures.
In simplified form:
TCE = Net voyage income ÷ Total voyage days
This allows the operator to compare:
- Different voyage-charter opportunities
- A voyage fixture against a time-charter alternative
- Different cargo sizes
- Different loading and discharge ranges
- Competing deployment options for the same vessel
The calculation is only useful, however, when the assumptions are realistic.
A precise spreadsheet based on unrealistic consumption, speed or port time is still a poor estimate.
Ballast Time Must Be Charged to the Voyage
One of the most common commercial mistakes is to assess the laden voyage while treating the ballast passage as a separate matter.
The ship must reach the loading port before it can earn freight. The time and fuel required to position the vessel are therefore part of the employment decision.
A high-rate cargo may be less attractive when the vessel must ballast several thousand miles to reach it.
The calculation should include:
- Ballast distance
- Expected ballast speed
- Weather allowance
- Ballast fuel consumption
- Canal or routing costs
- Waiting time before laycan
- Commercial risk if the vessel arrives late
Ballast exposure is particularly important when comparing a nearby cargo at a moderate rate with a distant cargo carrying a premium.
The higher rate does not automatically produce the stronger TCE.
Bunker Assumptions Can Change the Entire Result
Bunkers are among the largest voyage-specific expenses, and current bunker pricing is an important input in voyage planning, contract negotiation and TCE assessment.
A small error in daily consumption may appear insignificant. Across a long voyage, it can materially alter the result.
The estimator should consider separate consumption figures for:
- Ballast passage
- Laden passage
- Port idle time
- Cargo operations
- Tank cleaning or heating
- Auxiliary machinery
- Different fuel grades
- Emission-control-area operation
The vessel’s contractual consumption should not automatically be used as the expected operational consumption.
Actual performance may be affected by hull fouling, weather, current, engine condition, draft and speed instructions. The most reliable estimate uses recent vessel-performance data rather than an ideal figure taken from an old description.
Port Time Is Not Free Time
Commercial attention is often concentrated on sea passage because distance and bunker consumption are easy to calculate.
Port time can be equally damaging.
A vessel waiting at anchorage continues to incur daily operating costs. It may also consume fuel, lose its next employment opportunity and create uncertainty around crew, stores and maintenance planning.
Laytime and demurrage provisions may compensate the owner under certain circumstances, but only when the delay falls within the charterparty terms and the claim is properly supported.
Not every day lost in port becomes recoverable demurrage.
Notice of Readiness validity, berth availability, weather interruptions, shifting time, documentation and cargo readiness can all affect the final calculation.
The voyage estimate should therefore include a realistic port-time assumption—not simply the minimum time required to pump or handle the cargo.
Cargo Quantity Changes More Than Freight
A larger cargo normally increases gross freight, but it may also affect the vessel’s draft, route and port access.
The maximum intake may be restricted by:
- Load-line limits
- Port-draft restrictions
- Channel depth
- Under-keel-clearance requirements
- Water density
- Bunker quantity
- Seasonal zones
- Cargo stowage factor
- Terminal limitations
An estimate based on an intake that the vessel cannot physically load is commercially meaningless.
The operator must also examine whether additional cargo increases port time, heating requirements, pumping time or consumption.
Maximum cargo is not always maximum return.
The Next Voyage Matters
A fixture should not be evaluated only as an isolated voyage.
The discharge position may leave the vessel in a strong cargo area—or in a location where the next employment requires substantial ballast.
A slightly weaker current fixture may be commercially superior when it positions the vessel for a stronger follow-on trade.
Experienced operators therefore consider:
- Expected redelivery or discharge position
- Seasonal cargo flows
- Likely next employment
- Bunker availability
- Ballast exposure after discharge
- Upcoming surveys or dry-docking
- Charter commitments elsewhere
This does not mean relying on an uncertain future cargo to justify a bad present fixture. It means evaluating the vessel’s full trading sequence rather than one headline rate.
A Practical Pre-Fixture Review
Before accepting a voyage, the operator should test the estimate against several scenarios.
The calculation should include:
- Expected gross freight.
- Address commission and brokerage.
- Ballast and laden distances.
- Realistic speeds and consumptions.
- Current bunker prices.
- Port and canal expenses.
- Expected loading and discharge time.
- A reasonable weather margin.
- Cargo-intake limitations.
- Follow-on positioning.
- Sensitivity to delay and bunker-price changes.
A strong estimate should show what happens when the voyage takes two days longer, the ship consumes more fuel or the cargo intake is reduced.
If a small change turns the voyage from profitable to poor, the fixture carries more risk than the headline rate suggests.
Final Thoughts
The freight market is discussed in rates, but vessels earn money through complete voyages.
A commercially sound fixture is not necessarily the one with the highest dollars per tonne or the strongest Worldscale number. It is the one that delivers the best risk-adjusted return after all costs, time and positioning consequences have been considered.
The rate attracts attention.
The voyage calculation determines whether the fixture was actually worth taking.