(3) Except as provided by this section, nothing in this section affects any other law relating to the payment of interest on an amount of damages."
14 Mr Glover claims interest on his damages. There is no dispute that he is entitled to such interest but the quantum is in issue. This is because there is a dispute about the period over which interest should be calculated. The defendant contends that the interest should be calculated over a period of only 13.5 years. The amount of interest referable to that period is agreed by the parties to be $684,904. Mr Glover, in contrast, contends that the interest should be calculated over a period of only 16.5 years. The amount of interest referable to that period is agreed by the parties to be $869,300.
15 Although the defendant originally contested its liability to pay interest in accordance with s 151M, for reasons that are now unnecessary to relate, it no longer does so. The agreements between the parties make it clear that the defendant accepts both a liability to pay interest and the rate at which it should do so, the defendant contesting only the period over which interest should be calculated. The defendant has accordingly implicitly accepted that I have the power, in the circumstances as they apply to this case, to award such interest in accordance with s 151M(2) of the Act.
16 The difference in the parties' respective approach to the calculation of interest up to judgment arises in the following way. The re-hearing in this matter was listed to commence on 12 February 2007. It did not proceed on that day because Mr Glover successfully applied to vacate the date. In the events that occurred, it was not heard until it came before me on 29 June 2009. The defendant resists Mr Glover's claim for interest from 12 February 2007 upon the basis that it was ready and willing to proceed with the trial on that day as originally scheduled and that through no fault of the defendant the hearing was vacated to suit Mr Glover's convenience or to accommodate the difficulties then confronting him for which the defendant was not responsible. Mr Glover does not contest the proposition that the defendant had nothing to do with the vacation of the hearing.
17 The purpose of the discretion in s 100 is to permit a successful party to be properly compensated for the practical loss it has suffered: Andjelic v Marsland [1996] HCA 55; (1996) 186 CLR 20. In MBP (SA) Pty Ltd v Gogic [1991] HCA 3; (1991) 171 CLR 657 at 663 the High Court said this:
"With great respect to the judgment of Gibbs J. in Cullen v. Trappell, although it is a fallacy to refuse to award any interest on the ground that the verdict contains a built-in inflationary factor, it is equally fallacious to hold that a plaintiff will be properly compensated for the delay in obtaining damages for pre-trial pain and suffering only if the award of damages contains an amount for interest calculated at the commercial rate or rates. The function of an award of interest is to compensate a plaintiff for the loss or detriment which he or she has suffered by being kept out of his or her money during the relevant period: Batchelor v. Burke [1981] HCA 30; (1981) 148 CLR 448, per Gibbs C.J. at p 455. But the loss or detriment which a plaintiff suffers by being kept out of his or her damages for pre-trial pain and suffering cannot be equated with the amount which those damages, invested at the commercial rate of interest, could have earned during the relevant pre-trial period. The determinants of rates of interest have been the subject of much dispute among economists. But it cannot be denied that during periods of significant inflation, such as those which have existed in Australia during the last 25 years, commercial rates of interest reflect a component to compensate a lender for the decline, by reason of inflation, in the real value of the principal which occurs during the period of the loan: see the comments, for example, in Hawkins v. Lindsley (1974) 49 ALJR 5, at pp 6-7; 4 ALR 697, at p 699; Sharman v. Evans [1977] HCA 8; (1977) 138 CLR 563, at p 588; Todorovic v. Waller, at pp 429, 448. Damages for pre-trial non-economic loss, however, are assessed in accordance with the value of money as at the time of the award. In no way is any loss which a plaintiff incurs by reason of being deprived of his or her damages for pre-trial non-economic loss brought about by inflationary factors. In those circumstances, to award interest on damages for non-economic loss during the pre-trial period by reference to commercial rates is to compensate the plaintiff for a "loss" which he or she has not sustained."
18 I note that I have not been asked to distinguish, and will assume that the parties themselves have distinguished, between elements of economic and non-economic loss within the damages awarded upon which their respective agreed interest sums have been calculated.
19 Successful plaintiffs who obtain a money judgment will generally be entitled to an award of interest: Ruby v Marsh [1975] HCA 32; (1975) 132 CLR 642 at 644. Because the award of interest is essentially compensatory, the defendant's conduct in defending the proceedings (whether or not reasonable and diligent), does not ordinarily provide a proper basis for either making or refusing an award of interest. This is quite apart from circumstances where provisions such as s 151M of the Workers Compensation Act apply.
20 If the purpose of the discretion to award interest is to compensate the plaintiff for the period during which he or she has been out of his or her money, there seems little merit in a detailed consideration of the competing claims as to the cause or causes of any delays by the parties that may have extended the period during or over which the interest is claimed. The position may be different if the parties' respective access to investment opportunities or interest rates is different but where the prevailing opportunities are not dissimilar then the defendant's obligation in effect to account to the plaintiff for the use of the plaintiff's money should substantially inform the outcome. The general principles applying to an exercise of the discretion in question were discussed in ICT Pty Limited v Sea Containers Limited [2006] NSWSC 1280 at [14] - [19].
21 The factual basis for the decision I am asked to make is limited. It has not significantly been coloured or characterised by pejorative suggestions of fault or blame beyond Mr Glover's concession that the defendant was not at fault in causing the delay or contributing to it. I have been greatly assisted by the learned analysis of Moffitt P in Bennett v Jones [1972] 2 NSWLR 355 at 367 as follows:
"When there is part of a verdict, which may properly be the subject of an award of interest, because it relates to money which has been outstanding, the wide discretion to award interest arises. At this point we are concerned with how this Court should itself exercise this discretion. Before doing so, it is relevant to inquire what is the relevance of delay. If a plaintiff fails in some respects to give to a defendant all the information required under the court's procedures, or fails, before the action, to volunteer all information that would enable a defendant to tender or pay the sum eventually awarded, or, if the plaintiff defaults in court procedures in some other way, ought this attract a discretion not to award interest, or to limit the award?