“1) Subject to paragraph (2) and paragraph (4)(a), where a Part 36 offer is accepted within the relevant period the claimant will be entitled to his costs of the proceedings up to the date on which notice of acceptance was served on the offeror. 2) Where- a) A defendant’s Part 36 offer relates to part only of the claim; and b) At the time of serving notice of acceptance within the relevant period the claimant abandons the balance of the claim, the claimant will be entitled to his costs of the proceedings up to the date of serving notice of acceptance unless the court orders otherwise. 3) Costs under paragraphs (1) and (2) of this rule will be assessed on the standard basis if the amount of costs is not agreed. ….. 4) Where- a) a Part 36 offer that was made less than 21 days before the start of trial is accepted; or b) a Part 36 offer is accepted after expiry of the relevant period, if the parties do not agree the liability for costs, the court will make an order as to costs. 5) Where paragraph (4)(b) applies, unless the court orders otherwise- a) the claimant will be entitled to his costs of the proceedings up to the date on which the relevant period expired; and b) the offeree will be liable for the offeror’s costs for the period from the date of expiry of the relevant period to the date of acceptance.”
“18… The significance of 36.21 is that, unlike 36.20, it refers specifically to the court being entitled to order costs on the indemnity basis from the latest date from when the defendant could have accepted the offer which had been made. Equally, it refers to interest on a higher rate than normal in the case of situations where it applies. Where Part 36.20 is compared with 36.21, light is thrown on the appropriate approach to the application of Part 36.20 19. The clear inference from the absence of any reference to an indemnity basis in 36.20 is that, in normal circumstances, an order for costs which the court is required to make under that Part to make, unless it considers it unjust to do so, is an order for costs on the standard basis. That means that if the court is going to make an order for indemnity costs, as it can in the case where Part 36.20 applies, it should do so on the assumption that there must be some circumstances which justifies such an order being made. If I may here adopt the way it was put in argument by Waller LJ, there must be some conduct or (I add) some circumstances which takes the case out of the norm.”
“For my part, I think it may well be appropriate, at least in substantial proceedings involving commercial interests of significant importance both in balance sheet and reputational terms, that the court should award interest on costs under the rule where substantial sums have inevitably been expended perhaps a year or more before an award of costs is made and interest begins to run on it under the general rule.”
“… it seems to me that the court has a broad discretion when deciding whether to award interest on costs from a date before judgment. That discretion must be exercised in accordance with the principles set out inCPR 44.3 and the court must take into account all the circumstances of the case, including such matters as the conduct of the parties and the degree to which a party has succeeded. Further, the discretion must be exercised in accordance with the overriding objective of dealing with the case justly. I am unable to accept the submission that costs should only be awarded in a case which is in some way out of the norm. I find no basis for that in the CPR and I believe it would provide an unwarranted fetter on the court’s discretion.”
“Where a party has won and has got an order for costs the only reason why he does not get the money straight away is because of the need for a detailed assessment. Nobody knows how much it should be. If the detailed assessment were carried out instantly he would get the money instantly. So the successful party is entitled to the money. In principle he ought to get it as soon as possible. It does not seem to me to be a good reason for keeping him out of some of his costs that you need time to work out the total amount. A payment for some lesser amount which you will almost certainly collect is a closer approximation to justice. So I hold that where a party is successful the court should on a rough and ready basis also normally order an amount to be paid on account, the amount being a lesser sum that the likely full amount.”
“(1) On an assessment of the costs of a party, the court may have regard to any estimate previously filed by the other party, or by any other party in the same proceedings. Such an estimate may be taken into account as a factor among others, when assessing the reasonableness and proportionality of any costs claimed. (2) In particular where- (a) there is a difference of 20% or more between the base costs claimed by receiving party and the costs shown in an estimate of costs filed by that party; and (b) it appears to the court that- (i) the receiving party has not provided a satisfactory explanation for that difference; or (ii) the paying party reasonably relied on the estimate of costs; the court may regard the difference between the costs claimed and the costs shown in the estimate as evidence that the costs claimed are unreasonable or disproportionate.”