been delayed to allow an amended answer and additional discovery, which would have forced Lifetime to bear further expenses.
We have repeatedly upheld the trial court’s discretion to refuse amendments under similar circumstances. See Mitsubishi Aircraft Int’l v. Brady, 780 F.2d 1199, 1203 (5th Cir.1986); Gulf Oil Trading Co. v. M/V Caribe Mar, 757 F.2d 743, 751-52 (5th Cir.1985); Daves v. Payless Cashways, Inc., 661 F.2d 1022, 1025 (5th Cir. Unit A Nov.1981). The district court did not abuse its discretion in denying Fuchs’ motion to amend.
III.
INTEREST
The district court overlooked awarding Fuchs interest on her judgment. Cavnar v. Quality Control Parking, 696 S.W.2d 549, 554 (Tex.1985), held that “[pjrejudgment interest shall accrue at the prevailing rate that exists on the date judgment is rendered according to the provisions of Tex.Rev.Civ.Stat.Ann. art. 5069-1.-05, § 2.” On its face, Cavnar was limited to “wrongful death, survival and personal injury actions,” id. at 556, but our court has held that “it must be read to create a judicial scheme for the award of prejudgment interest in all cases,” Crown Cent. Petroleum Corp. v. National Union Fire Ins. Co., 768 F.2d 632, 637 (5th Cir.1985). Fuchs is therefore entitled to prejudgment interest according to art. 5069-1.05, § 2. Cavnar mandates that “interest shall begin to accrue on both pecuniary and non-pecuniary damages from a date six months after the occurrence of the incident giving rise to the cause of action.” 696 S.W.2d at 555. In this case, prejudgment interest shall begin to accrue from six months after March 25, 1988, the date Fuchs was stipulated to have been fired. Finally, because attorney’s fees do not fall within the term “pecuniary and non-pecuniary damages,” they cannot bear prejudgment interest. Accord Hervey v. Passero, 658 S.W.2d 148 (Tex.1983) (per curiam).
Postjudgment interest on money judgments recovered in federal district court is governed by 28 U.S.C. § 1961(a). This statute applies even in diversity cases.
Nissho-Iwai Co. v. Occidental Crude Sales, 848 F.2d 613, 622 (5th Cir.1988). Fuchs is entitled to interest from April 4, 1990, the date of judgment. Pursuant to Fed.R.App.P. 37, we direct the district court to award post-judgment interest on the entire amount of the final judgment, including damages, prejudgment interest, and attorney’s fees.
IV.
ATTORNEY’S FEES
The district court awarded Fuchs $10,000 in attorney’s fees on the authority of § 122.002(b) of the TJRS. Fuchs attacks this amount as inadequate, principally because the many hours expended by her counsel yield a total fee of $47,138.06. Lifetime argues that any larger award would not bear a reasonable relationship to the amount of damages awarded. In this diversity case, Texas law governs the district court’s determination of the appropriate fee. Alyeska Pipeline Serv. Co. v. Wilderness Soc’y, 421 U.S. 240, 259 n. 31, 95 S.Ct. 1612, 1622 n. 31, 44 L.Ed.2d 141 (1975). We review this determination for abuse of discretion. Thompson v. San Antonio Retail Merchants Ass’n, 682 F.2d 509, 515 (5th Cir.1982) (per curiam).
Applying Texas law, the district court trimmed certain items from Fuchs’ original request of $53,000, resulting in a claim of about $41,500. The court then reduced this amount to $10,000, applying the rule that an award of attorney’s fees must bear some reasonable relationship to the amount of damages awarded and citing Wayland v. City of Arlington, 711 S.W.2d 232, 233 (Tex.1986) (per curiam). There are two problems with this drastic reduction. First, as Lifetime conceded at oral argument, time expended is the most important factor in the analysis of reasonableness. The costs ran high here in part because depositions had to be taken at Lifetime’s Minneapolis headquarters. Second, Wayland states only that the amount of recovery awarded is one factor in the determina