The Applicable Principles
4 This Court's power to award interest up to judgment is contained in s 51A of the Federal Court of Australia Act 1976 (Cth). Insofar as presently relevant it provides:
"51A (1) In any proceedings for the recovery of any money (including any debt or damages or the value of any goods) in respect of a cause of action that arises after the commencement of this section, the Court or a Judge shall, upon application, unless good cause is shown to the contrary, either:
(a) order that there be included in the sum for which judgment is given interest at such rate as the Court or the Judge, as the case may be, thinks fit on the whole or any part of the money for the whole or any part of the period between the date when the cause of action arose and the date as of which judgment is entered; or
(b) without proceeding to calculate interest in accordance with paragraph (a), order that there be included in the sum for which judgment is given a lump sum in lieu of any such interest."
5 I would make the following observations on this section and its application.
6 (1) It is well settled that the objective of provisions of this type is to compensate an applicant for the loss it suffers in being kept out of its money or damages: see Batchelor v Burke (1981) 148 CLR 448 at 455; Clarke v Foodland Stores Pty Ltd [1993] 2 VR 382 at 396; and see Tilbury, Civil Remedies, vol 1, 1990, para 3226ff.
7 (2) The award of interest under s 51A(1) is mandatory "unless good cause is shown to the contrary": Australian Guarantee Corporation Ltd v Border Printing Services Pty Ltd (Lockhart, Spender and Hill JJ, 21 April 1989, unreported); cf Supreme Court Act 1970 (NSW) s 94 that does not use the "good cause" formula but see eg Donellan v Watson (1990) 21 NSWLR 335 at 345 ("interest is almost invariably to be allowed when claimed"). Ordinarily it will be for the respondent to establish such "good cause": see Wright v West Australian Trustee & Agency Co Ltd [1987] VR 771 at 775; this does not necessarily require that evidence be adduced for the purpose: see Clarke v Foodland Stores Pty Ltd, above at 394. Furthermore, it is open to the court, for example, to take into account such considerations of public policy as may be relevant in the circumstances: see Border Printing Services Pty Ltd v Australian Guarantee Corporation Ltd (Pincus J, 19 December 1988, unreported).
8 (3) Though the matter is and remains one of judicial discretion, it is the usual practice of this Court in applying s 51A(1) to adopt the rates of interest applied by the Supreme Court of the State or Territory in which this Court is dealing with the matter: Namol Pty Ltd v A W Baulderstone Pty Ltd (1993) 119 ALR 187; Nagy v Masters Dairy Ltd (1997) 150 ALR 301 at 317; though, no less so than a State court, the Court may then depart from those rates as a matter of discretion given the circumstances of the case: see Clarke v Foodland Stores Pty Ltd, above, at 389. A justification for this practice is that it helps to ensure that damages are awarded on the same basis at least as to rates of interest whether a proceeding is instituted in this Court or in a Supreme Court. Parity in the making of interest awards will, though, often be unattainable because the legislation of a particular State may prescribe varying periods for which pre-judgment interest may be awarded (depending upon the nature of the cause of action in question) that differ from what is allowable under s 51A(1): see eg Supreme Court Act 1986 (Vic) s 58 and s 60; Supreme Court Act 1935 (SA) s 30c; Supreme Court Act 1995 (Qld) s 47.
9 (4) Given the variations in the language and structure of the pre-judgment interest provisions of the various Australian States, care must be taken in using the decisions of State courts on their own statutes to elucidate the meaning of s 51A(1). For example, for the purposes of s 51A(1) the formula "good cause to the contrary" would appear on its proper construction to mean only good cause for not allowing interest at all: see Australian Guarantee Corporation Ltd v Border Printing Services Pty Ltd, above. The subsection itself otherwise provides discretions as to the rate and the period of an interest award. In contrast, the same formula as used in s 58 of the Supreme Court Act 1986 (Vic) has been interpreted to mean good cause for allowing interest otherwise than in accordance with the terms of that section: see Clarke v Foodland Stores Pty Ltd, above, at 391-393. But s 58, notably, does not provide the same discretions as does s 51A(1).
10 (5) It is neither possible nor desirable to define what will constitute "good cause" disentitling a party to interest under s 51A(1); each case must be considered by reference to its own circumstances: Australian Guarantee Corporation Ltd v Border Printing Services Pty Ltd, above.
11 (6) There is considerable diversity in judicial opinion as to the extent to which, if at all, the rate or (more usually) the period selected for an interest award should as a discretionary matter be moulded adversely to a party that delays in the prosecution or defence of a claim where no resultant detriment to the other party is shown: see eg Geoffrey W Hill & Associates (Insurance Brokers) Pty Ltd v Squash Centre (Allawah North) Pty Ltd (1990) 6 ANZ Insurance Cases s61-012 ("[t]he principle of punishment is not borne out by a consideration of the purpose of the statutory discretion"); De Girolamo v South Australia (1991) 56 SASR 40 at 44-45; but cf Keates v Nelson (NSW Court of Appeal, Kirby P, Mahoney and Cripps JA, 16 April 1992, unreported); Golden West Refining Corporation Ltd v Daly Laboratories Pty Ltd (Carr J, 16 February 1995, unreported): Tilbury, above, para 3230; and see also BP Exploration Co (Libya) Ltd v Hunt (No 2) [1979] WLR 783 at 845-847 and McGregor on Damages, 16th Ed, 1997, paras 668-669. Nonetheless, insofar as concerns a successful applicant who has been guilty of unreasonable delay, the view I am prepared to follow in the absence of binding authority is that the period for which the interest award is made can properly be adjusted if to allow interest for the whole period for which it could otherwise be ordered would work an injustice to the respondent in the circumstances: cf Clarke v Foodland Stores Pty Ltd, above, at 400. Such would seem to be consistent with the policy of the s 51A(1) in that an applicant that has been held out of the benefit of its money because of its own unreasonable actions should not be allowed as of course to cast the effects of a 'self-inflicted burden' onto the respondent: Keithara Pty Ltd v J G L Holdings Pty Ltd (Supreme Court of Victoria, Smith J, 6 December 1994, unreported).