Sola Optical Australia Pty Ltd v Mills

Sola Optical Australia Pty Ltd (the appellant) appealed to the High Court of Australia from a decision of the Full Court of the Supreme Court of South Australia. The dispute concerned the interpretation of a clause in an employment agreement between the appellant and Mr. Mills (the respondent), a former employee. The clause in question related to the calculation of a bonus payable to Mr. Mills upon the termination of his employment.

The High Court was required to determine whether the bonus payable to the respondent was to be calculated based on the profit of the company for the financial year in which his employment terminated, or on the profit for the financial year preceding that termination. This involved an analysis of the specific wording of the employment agreement and the application of principles of contractual interpretation.

The Court considered the plain meaning of the contractual clause, which stipulated that the bonus was to be calculated on "the profit for the financial year ending on the date of termination of his employment". The judges unanimously held that this wording clearly indicated that the profit for the financial year in which the termination occurred was the relevant figure for the bonus calculation. They rejected the appellant's argument that the preceding financial year's profit should be used, finding no ambiguity in the language that would justify such an interpretation. The Court emphasised that where contractual language is clear, it must be given its ordinary and natural meaning.

The appeal was allowed, and the order of the Full Court of the Supreme Court of South Australia was set aside.