Justice Busby did not participate in the decision. The primary issue in this case is whether a county commissioners court has authority to decide whether a statutory probate court judge receives a supplemental salary for serving as the local administrative statutory probate court judge. The trial court and the court of appeals held that the law grants that authority to the statutory probate court judge, not the commissioners court. We disagree and reverse. Kimberly Sullivan has served as judge of the Galveston County statutory probate court since 2011. Because Galveston County has only one statutory probate court, see TEX. GOV’T CODE § 25.0861(b), Sullivan also serves as the county’s local administrative statutory probate court judge, pursuant to an administrative order issued by the statewide presiding judge of the state’s statutory probate courts.[1] The county pays Sullivan an annual salary for her service as the statutory probate court judge, in an amount set by the commissioners court within a range dictated by the Texas Government Code. See id. § 25.0023(a), (a-2). After assuming the bench in 2011, Sullivan submitted annual budgets for her court’s operations to the commissioners court, each of which included a $5,000 supplemental salary for her services as the local administrative statutory probate court judge. The commissioners court approved county budgets containing the supplemental salary the first three years after Sullivan took office, but then struck that amount before approving the budget for the 2014-2015 fiscal year. In response, Sullivan filed this suit against the commissioners court’s members in their official capacities,[2] challenging both their authority and their decision to strike the supplemental salary. While this suit was pending, the commissioners again excluded the supplemental salary from the 2015-2016 budget, then approved budgets with the supplemental salary for the next two years, and then again excluded the supplemental salary from the 2018-2019 budget. Sullivan amended her pleadings to challenge the commissioners’ actions for each of the three years they excluded the supplemental salary. The commissioners initially filed a plea to the jurisdiction based on governmental immunity, which the trial court denied. On interlocutory appeal, the court of appeals affirmed the trial court’s decision in part, holding that Sullivan adequately pleaded a claim that the commissioners abused their discretion by acting arbitrarily and capriciously when they struck the supplemental salary from the county budget. Henry v. Sullivan, 499 S.W.3d 545, 554 (Tex. App.—Houston [14th Dist.] 2016, pet. denied). The court expressly did not reach the issue of whether Sullivan adequately pleaded that the commissioners lacked authority to strike the supplemental salary. Id. The court modified the trial court’s order, however, to grant the commissioners’ plea as to claims regarding the 2014-2015 budget because that fiscal year had ended by the time the court issued its decision. Id. at 557. The court reasoned that the trial court had jurisdiction only over Sullivan’s claims that the commissioners acted ultra vires by striking the supplemental salary, but because ultra vires claims can only support prospective relief, the trial court lacked jurisdiction over claims seeking relief related to fiscal years that had ended. Id. (citing City of El Paso v. Heinrich, 284 S.W.3d 366, 376-77 (Tex. 2009)). On remand following the interlocutory appeal, the trial court conducted a bench trial and then entered a final judgment in Sullivan’s favor. The court concluded that the commissioners’ failure “to follow Judge Sullivan’s direction to pay” her the $5,000 supplemental salary was “ultra vires and beyond their granted authority” and thus “arbitrary and capricious.” The court granted Sullivan declaratory relief and awarded her about $63,000 in attorney’s fees and costs. The court of appeals affirmed the judgment, S.W.3d , 2020 WL 5666525, at *9 (Tex. App.—Houston [14th Dist.] Sept. 24, 2020), and the commissioners petitioned for this Court’s review. We conclude that Texas law grants the commissioners the authority and discretion to decide whether to pay Sullivan a supplemental salary for her services as the local administrative statutory probate judge, and Sullivan failed to establish any basis to find the commissioners abused that discretion. The Texas Constitution grants county commissioners courts “such powers and jurisdiction over all county business, as is conferred by this Constitution and the laws of the State, or as may be hereafter prescribed.” TEX. CONST. art V, § 18(b). These powers include the power to approve and adopt the county’s annual budget. TEX. LOC. GOV’T CODE §§ 111.062-.070; Henry v. Cox, 520 S.W.3d 28, 36 (Tex. 2017) (“A core component of [the commissioners court's] legislative function is the county budget-making process.”). As part of a county budget, the commissioners must “set the total annual salary of each judge of a statutory probate court.” TEX. GOV’T CODE § 25.0023(a); see Henry, 520 S.W.3d at 36-37 (explaining that district courts have constitutional and inherent authority to ensure that commissioners courts pay county employees sufficiently to ensure the “proper administration of justice,” but noting that “a court may not usurp legislative authority by substituting its policy judgment for that of the commissioners court acting as a legislative body”). When Sullivan filed this suit, the statute required that the salary be “an amount that is at least equal to the annual salary received by a district judge in the county.” TEX. GOV’T CODE § 25.0023(a).[3] The counties must pay the judges’ salaries using county treasury funds, see, e.g., id. § 25.0862(g), but the state reimburses the counties for a portion of those salaries, id. § 25.00211(a).[4] The state pays these reimbursements from the state’s “judicial fund,” which is a “separate fund in the state treasury.” Id. § 21.006. The state judicial fund includes monies each county’s statutory probate courts collect as fees and remit to the state comptroller. TEX. LOC. GOV’T CODE §§ 133.004(7), .051-.055, .151. By law, the judicial fund can be used only “for court-related purposes for the support of the judicial branch of this state.” TEX. GOV’T CODE § 21.006. In addition to reimbursing counties for a portion of their statutory probate court judges’ salaries, the state provides counties with additional funds if, in any given fiscal year, the combined amount the state receives from the state’s statutory probate courts exceeds the combined amount it pays to the counties for the statutory probate court judges’ salaries. Id. § 25.00212(a). The amounts the state pays the counties—both to reimburse a portion of the statutory probate court judges’ salaries and as any additional amounts paid when the state receives more than it pays toward the judges’ salaries—must be paid “to the county treasury for deposit in” each county’s “contributions fund.” Id. §§ 25.00211(b), .00212(b). A “contributions fund” is a fund created within the treasury of each county that “collects the additional fees under Section 51.704.” Id. § 25.00213(a). Before recent amendments, Section 51.704 required statutory probate court clerks to collect—in addition to “all other fees required or authorized by other law”—a $40 filing fee in each probate, guardianship, mental health, or civil case filed in the court, “to be used for court-related purposes for the support of the judiciary.” Id. § 51.704(a). The law required each county to remit the funds collected through this fee, along with general filing fees collected under Chapter 118 of the Local Government Code, to the state comptroller for deposit in the state judicial fund. Id. § 51.704(c); see also TEX. LOC. GOV’T CODE §§ 118.052(2), 133.051, .052, .055.[5] Funds maintained within a county’s contributions fund “may be used only for court-related purposes for the support of the statutory probate courts in the county, including for the payment of the compensation of a statutory probate court associate judge in accordance with Section 54.605.” TEX. LOC. GOV’T CODE § 25.00213(b). Keying on this language, Sullivan argues that the commissioners have no authority over the contributions fund and must approve the expenditures she proposes from that fund, so long as those expenditures are “for court-related purposes for the support of the statutory probate courts.” The trial court agreed, concluding that the commissioners had no “authority over payment made from the contributions [fund] other than to determine whether or not the payment was ‘for court related purposes.’” And because the commissioners struck Sullivan’s proposed salary supplements without first determining whether they were for a court-related purpose, the trial court concluded the commissioners’ decision was both ultra vires and arbitrary and capricious. The court of appeals also agreed that Texas law required the commissioners to make a threshold determination of whether the $5,000 request was for “court- related purposes” before they could deny the request. S.W.3d at , 2020 WL 5666525, at *6-8. We conclude the courts below misconstrued the relevant statutes. Because Section 25.00213(b) limits the use of the contributions fund to “court-related purposes for the support of the statutory probate courts in the county,” we agree that the commissioners cannot authorize an expenditure from that fund unless they first determine that the expenditure will serve such a purpose. But nothing in the statute requires the commissioners to make or approve an expenditure from the contributions fund simply because it is for a court-related purpose. And nothing in the statute prohibits the commissioners from eliminating an expenditure on other grounds before or without determining whether the funds will be spent for court-related purposes. As a result, the trial court’s finding that the commissioners did not make a determination regarding the purposes for Sullivan’s proposed $5,000 salary supplements before they eliminated those expenditures from Sullivan’s proposed budget is irrelevant. Sullivan’s contentions and the lower courts’ holdings suffer from the misconception that a statutory probate court judge, rather than the commissioners, has the authority to decide how to spend funds in the county’s contributions fund. Sullivan argues, for example, that the commissioners’ authority extends only to the “county budget,” and that the contributions fund is not a part of the county budget. Instead, she contends, county contributions funds are “specially created, dedicated funds” that contain only state monies and are outside the commissioners’ control. The statutes, however, do not support that contention. The statutes do provide that the amounts the state pays to the county from the judicial fund to reimburse a portion of the statutory probate court judges’ salaries under Section 25.00211 and as excess funds under Section 25.00212 must be deposited into the county’s contributions fund, TEX. GOV’T CODE §§ 25.00211(b), .00212(b),[6] and that the contributions fund “may be used only for court-related purposes for the support of the statutory probate courts in the county,” id. § 25.00213(b). But the contributions fund belongs to the county, not to the county’s statutory probate courts. The statutory probate courts collect fees, which the county delivers to the state for deposit into the state’s judicial fund, and the state then pays funds “to the county treasury for deposit in” the county’s contributions fund. Id. §§ 25.00211(b), .00212(b) (emphasis added). The contributions fund exists “in the county treasury.” Id. § 25.00213(a) (emphasis added). Only the commissioners court has power and jurisdiction over funds in the county treasury, as part of the “county business.” TEX. CONST. art. V, § 18. Only the commissioners court can approve the county’s budget, which must include “the cash on hand to the credit of each fund of the county government” and amounts “received from all sources during the preceding fiscal year,” TEX. LOC. GOV’T CODE § 111.034(b) (emphases added), as well as all “expenditures from the various funds of the county,” id. § 111.068(b) (emphasis added). When reviewing a proposed budget, the commissioners court has discretion to “make any changes in the proposed budget that it considers warranted by the facts and law and required by the interest of the taxpayers,” so long as the budgeted expenditures “from the various funds of the county” do not exceed the balances and anticipated revenue “in those funds.” Id. § 111.039(b). Once the commissioners court approves a county budget, it may generally spend its funds “only in strict compliance with the budget.” Id. § 111.070(a).[7] No statute grants a statutory probate court judge power or jurisdiction over the county contributions fund. Nor does any statute require a commissioners court to make expenditures from the contributions fund to supplement a statutory probate court judge’s salary, either at the direction of a statutory probate court judge or otherwise. Instead, the statutes grant the commissioners court the authority to approve expenditures from the contributions fund in the exercise of its budgetary discretion. In short, the county’s contributions fund exists as part of the county treasury, and the law grants the commissioners court the authority and discretion to decide whether and how to spend those funds, subject only to the limitation that they may be spent only for “court-related purposes for the support of the statutory probate courts.” TEX. GOV’T CODE § 25.00213(b). As a result, the commissioners could not have acted ultra vires by declining to spend the funds on Sullivan’s proposed salary supplements.[8] See Heinrich, 284 S.W.3d at 372 (explaining that government officials act ultra vires only when they fail to perform a ministerial act or act without legal authority). As noted, Sullivan pleaded not only that the commissioners acted ultra vires, but also that their decision to eliminate her salary supplements was arbitrary and capricious. More specifically, she asserted her belief that the commissioners made the decision, at least in part, as political retribution in response to news articles criticizing Sullivan for spending county funds to attend out-of-state continuing- education courses.[9] The trial court, however, made no such finding. Although it did issue a conclusion of law that the commissioners’ decision “was arbitrary and capricious,” its final judgment based that conclusion only on its conclusion that the commissioners had no “authority” over payments made from the contributions fund. Because the statutes do not support that conclusion, we must also reject the trial court’s conclusion that the commissioners’ decision was arbitrary and capricious. Sullivan failed to establish that the commissioners acted outside their statutory authority or abused their discretion by denying her requests for salary supplements from the county’s contributions fund. We therefore grant the commissioners’ petition for review, without hearing oral argument pursuant to Texas Rule of Appellate Procedure 59.1, and reverse the court of appeals’ judgment and render judgment dismissing Sullivan’s claims against the commissioners. OPINION DELIVERED: October 7, 2022