Worldscale scenarios: compare the freight basis

Overview

Use the scenarios to understand the quotation mechanism. They are not current market assessments, and an illustrative conversion does not reproduce every component of a real freight settlement.

Key takeaways

• A Worldscale percentage needs its applicable flat-rate reference.
• Route, edition and relevant adjustments belong beside the headline indication.
• Compare monetary freight on a consistent cargo and contractual basis.
• Keep freight conversion separate from a vessel-specific earnings estimate.

Identify what the percentage refers to

Worldscale provides a standardised basis used in tanker freight negotiations. The negotiated percentage is applied to the relevant underlying rate, subject to the applicable terms and adjustments. Without that reference, the percentage alone cannot tell the analyst the monetary freight.

Worldscale describes freight calculations using flat rates, negotiated equivalents, cargo quantities and applicable differentials. Use current licensed material for actual calculations. Worldscale explanation.

The enquiry should identify the relevant loading and discharge basis. If a quotation contains port alternatives, ask which basis its indication assumes. A short market message may be sufficient for experienced participants who share that context, but a later analyst must still recover it accurately.

Keep the reference edition visible

A comparison needs to know which applicable rate basis is being used. Do not carry an old reference into a new quotation because the route description looks unchanged. Equally, do not assume that every message has adopted the reference convention intended by the analyst.

Store the source, permitted access reference and the basis confirmed by the parties. If that information is missing, mark the monetary conversion as incomplete. A plausible flat-rate assumption can create a precise-looking result that is not supported by the actual offer.

This discipline matters for historical comparisons too. A change in the quoted percentage and a change in the underlying basis are separate components. Mixing them can produce an apparent market movement that the chosen comparison does not properly explain.

Test two invented route cases

ILLUSTRATIVE — invented route inputs, calculated by script. The routes below are fictional and do not reproduce published Worldscale rates. All other additions and differentials are excluded from this teaching example.

Route A: 16 × 95 ÷ 100 = 15.20 USD per tonne. Route B: 24 × 75 ÷ 100 = 18.00 USD per tonne. The lower percentage in route B does not produce the lower monetary freight in this deliberately simplified example.

The lesson is about interpretation, not which route is commercially preferable. The actual transport task, expense allocation, time and operational feasibility must also be considered. Different routes are not interchangeable services simply because their freight can be expressed in the same currency.

Separate conversion from earnings

Freight conversion establishes an amount under a specified basis. A time-charter-equivalent calculation asks a different question about the revenue remaining after defined voyage expenses over a defined duration.

Do not rank vessel earnings solely by the converted freight per tonne. A route with greater basic freight may also involve different distances, time and expenses. The analyst needs an explicit voyage model before drawing an earnings conclusion.

Keep the steps visible: identify the freight basis, calculate the relevant monetary amount, establish expense assumptions and define the time boundary. Combining these into one unexplained output makes errors harder to locate and hides which source supports which part of the result.

Use a scenario-control sheet

The sheet can sit beside a spreadsheet or quotation comparison. Its value is that a reviewer can challenge the basis before relying on the arithmetic.

A fictional annual-comparison problem

Imagine a commercial report comparing a historical percentage with a later percentage for a similarly described movement. The chart suggests that freight has fallen, but the report does not identify the underlying rate basis used for either period.

The analyst should reconstruct the comparison using the appropriate reference for each observation and explain the distinction between percentage movement and monetary freight movement. If the historical basis cannot be verified, the report should state that limitation rather than infer a result from the percentages alone.

Preserve the source messages and the reference conventions. A revised chart should explain what changed in the methodology so readers do not mistake an analytical correction for a new market development.

Document exclusions instead of hiding them

A simplified teaching example can omit additions and differentials if that exclusion is explicit. A real payment review cannot assume that the same omissions are appropriate. Obtain the actual commercial basis and refer uncertain treatment to the authorised contractual reviewer.

Worldscale distinguishes its standard calculation basis from individual vessel circumstances. Use vessel-specific information for a separate commercial estimate. Worldscale help.

When a reviewer cannot resolve a required input, stop the affected calculation at a clearly marked provisional state. A transparent incomplete result is more useful than a completed number based on an invented convention.

Prepare a reviewable output

1. Identify the transport task and applicable reference basis.
2. Record the percentage and its commercial status.
3. Show cargo quantity and the treatment of relevant adjustments.
4. Display the conversion arithmetic in consistent units.
5. Separate any subsequent earnings calculation.
6. List remaining assumptions and their responsible reviewers.

The approval note should identify whether it is comparing quotations, reviewing an invoice or exploring hypothetical market sensitivity. Those purposes use related arithmetic but require different supporting evidence.

Common mistakes

Avoid comparing percentages across different bases without explanation. Do not turn a published assessment into a claim that a particular vessel is available at that level. Do not call the simplified example a complete freight settlement calculation.

Another mistake is copying a converted amount while dropping its units. Preserve whether a value is a percentage, a currency amount per tonne, total freight or daily earnings. Each answers a different question.

Where Zeaclub fits

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