OPINION
¶ 1 This case arises from damage done to a specialized wheelchair owned by the plaintiff/appellant, Tod Santee, when it was being unloaded from an airplane operated by defendants/appellees, Mesa Airlines, Inc., and America West Airlines, Inc. (collectively “America West”). 1 2After several years of pretrial litigation, the trial court granted America West’s motion and dismissed San-tee’s complaint pursuant to Rule 12(b)(6) and (c), Ariz. R. Civ. P. On appeal, Santee assigns a number of errors. Because we conclude we lack jurisdiction over the appeal, however, we order it dismissed.
¶ 2 Our jurisdiction is provided and limited by statute,
Campbell v. Arnold,
¶ 3 The timely filing of a valid notice of appeal is a prerequisite to the exercise of appellate jurisdiction. Ariz. R. Civ.App. P. 8(a);
State ex rel. Ariz. Structural Pest Control Comm’n v. Taylor,
¶ 4 The rationale behind this seemingly formalistic rule is to prevent “ ‘disruptions of] the trial process’ ” that “leav[e] the superior court uncertain as to its jurisdiction to decide a pending motion.”
Id.
¶ 14,
quoting Baumann v. Tuton,
¶ 5 Here, Santee filed his notice of appeal prior to the entry of the judgment, while a substantive motion remained pending before the trial court. This premature notice of appeal does not fall within the limited Barassi exception. And because Santee never filed a timely notice of appeal, we lack jurisdiction over the case before us.
¶ 6 In supplemental briefing ordered by this court, Santee notes that without the Rule 68 motion being filed, the trial court’s minute entry ruling was an appealable order that finally resolved all issues. He thus argues the motion should not have rendered an otherwise appealable order unappealable. This argument is unsupported by any authority, however, and does not take into account the aforementioned rationale behind Rule 9. It also overlooks the fact that time-extending motions under Rule 9(b) have the very same effect.
¶ 7 Santee next suggests that because a motion made under Rule 68(g) is not listed as a time-extending motion in Rule 9(b), it should have “no meaning” in the appellate context. We agree that a Rule 68(g) motion does not extend the time for filing a notice of appeal.
See
Ariz. R. Civ.App. P. 9(b). But we reject Santee’s premise that only time-extending motions are relevant to determining appellate jurisdiction. In emphasizing that its ruling applies “[i]n
all
other cases,”
Craig
makes plain that its jurisdictional rule is not limited to situations where time-extending motions have been filed; it also applies when there has not been a “final judgment.”
¶ 8 Santee also claims he falls within the Barassi exception because a Rule 68(g) motion concerns the “ministerial process of fixing taxable costs.” We reject this argument. Rule 68(g) provides:
If the offeree rejects an offer and does not later obtain a more favorable judgment other than pursuant to this Rule, the offer-ee must pay, as a sanction, reasonable expert witness fees and double the taxable costs, as defined in A.R.S. § 12-332, incurred by the offeror after making the offer and prejudgment interest on unliqui-dated claims to accrue from the date of the offer. If the judgment includes an award of taxable costs or attorneys’ fees, only those taxable costs and attorneys’ fees determined by the court as having been reasonably incurred as of the date the offer was made shall be considered in determining if the judgment is more favorable than the offer.
The rule thus requires a trial court to assess, at minimum, (1) whether a judgment was “more favorable” than a previous offer and (2) the “reasonable[nessj” of expert witness fees. Ariz. R. Civ. P. 68(g). These clearly are more than ministerial tasks and may require a trial court to exercise considerable discretion under the circumstances of a particular ease.
Disposition
¶ 9 Because Santee has not filed a valid, timely notice of appeal from the trial court’s judgment, the appeal is dismissed.
Notes
. Although Santee's wife, Sherry, is also a party to this appeal, her claims are derived from her husband’s. For ease of reference, we thus refer to Santee in the singular. Further, we note that U.S. Airways was dismissed as a party from this action. Even though U.S. Airways is now apparently affiliated with America West, we refer to the appellee simply as America West in this decision.
