Missouri State Auditor Nicole Fitzpatrick published her audit of the Arnold Retail Corridor Transportation Development District on April 6, 2026, rating the district Poor — the lowest tier in Missouri's four-category audit scale. The core finding: the TDD, which collects a 1-cent sales tax on transactions inside its boundary, has been directing approximately $3.3 million per year to city bond debt service rather than to transportation improvements. Under RSMo 238.200 et seq. — the Missouri Transportation Development District Act — transportation improvement is the statutory purpose. The money has been going somewhere else for years without any public reckoning.

Two additional failures: the Arnold city attorney made misleading public statements characterizing the transportation-purpose sales tax as a general sales tax in public communications. The TDD also failed Sunshine Law compliance requirements in handling public records requests. Before the audit was published, Arnold filed a lawsuit to block it. The lawsuit was dismissed. The audit proceeded and was published April 6. On June 2, city officials published a formal response.

The formal response does not survive the arithmetic that Missouri's CY2025 taxable sales data makes available.

What the Missouri DOR data shows

Missouri Department of Revenue data released in April 2026, covering Calendar Year 2025, documents the Arnold Retail Corridor TDD with the specificity the audit's narrative finding lacks. The district (code TDD00116) generated $377,984,590 in taxable sales during CY2025. The quarterly distribution: $88,938,194 in Q1; $98,394,581 in Q2; $94,415,319 in Q3; $96,236,497 in Q4. The pattern is stable across all four quarters. No anomalous quarter, no evidence of a commercial disruption that would explain the revenue allocation pattern. This is a consistently performing district.

At the TDD's 1-cent rate, $377.9 million in taxable sales produces approximately $3,779,846 in estimated annual TDD revenue. The auditor found approximately $3.3 million per year going to city bond debt service. Working through the arithmetic: $3.3 million from $3.78 million is 87.3 cents of every collected dollar going to city bonds rather than transportation. Approximately $480,000 — roughly 12.7% — remains available for the purpose the statute designates.

The Arnold TDD ranks ninth among Missouri's 204 TDDs with reportable data by 2025 taxable sales volume. It is not a marginal district at the edges of the framework. It is a significant district generating nearly $400 million annually, and the current TDD statutory framework has no automatic enforcement mechanism that prevents 87% of its revenue from going to non-transportation purposes year after year.

The city's June 2 defense and its limits

City officials responded on June 2 with a bond-covenant argument that has genuine legal substance at its core. The bonds Arnold issued to finance corridor infrastructure improvements were structured with TDD revenue pledged as the designated repayment source in the bond documents. Those pledges are contractual obligations. Redirecting TDD revenue from bond debt service without a refinancing structure that addresses the covenant terms would trigger violations: credit rating consequences, potential debt acceleration, and downstream fiscal damage that could far exceed the value of redirecting the revenue.

That argument is not frivolous. A city attorney who advises the council to redirect pledged revenue without addressing the covenant implications is creating a worse legal problem than the one the auditor identified. Cities that issue bonds and pledge specific revenue streams to service them incur real legal obligations. The bond covenant defense addresses a real constraint.

Where the defense fails is in the question it does not address: whether the original pledge of TDD revenue to non-transportation bond debt service was itself within the TDD statute's authority. RSMo 238.200 authorizes TDD revenue for transportation purposes. Whether pledging that revenue to retire bond debt for infrastructure the city characterizes as transportation-adjacent qualifies as a "transportation purpose" under the Act is the legal question that the audit documents and the General Assembly is positioned to resolve. The bond covenant defense answers whether the city can redirect revenue today without triggering defaults. It does not answer whether the original pledge was within statutory authority.

The defense is also silent on the Sunshine Law violations and the misleading public statements. The "Poor" rating is composite. Defending the revenue diversion category does not rehabilitate the governance failure categories.

The legislative path and what it requires

The auditor's recommendation to the General Assembly directs consideration of whether RSMo 238.200 should be amended to require explicit legislative authorization before TDD revenue can be pledged to non-transportation debt service, or to prohibit such pledges absent specific statutory authorization. No bill has been introduced as of this issue's publication date.

The Arnold case now provides the complete documentary record that TDD reform legislation needs: an audit finding that names the pattern, a city defense that frames the legal question, a DOR dataset that supplies the arithmetic, and a court record of a failed attempt to suppress the audit. For Missouri legislators considering whether to act, the Arnold case is the clearest possible documentation of what the current framework permits. The question is not whether the problem exists. It is documented. The question is whether the General Assembly is prepared to resolve the statutory ambiguity that the Arnold pattern exploits.

For Missouri TDD managers: a TDD board that maintains a similar revenue diversion pattern after April 6, 2026 has done so with knowledge of the auditor's characterization of that practice. That changes the character of the governance decision from a compliance gap to a deliberate choice made in the presence of an adverse documented finding.

87 cents of every dollar the Arnold TDD collected in 2025 went to city bond obligations. The statutory transportation purpose received 13 cents.

What other Missouri TDD managers need to know about the precedent

The Arnold case has established a new reference point for Missouri TDD governance that affects every TDD in the state, regardless of whether their specific revenue allocation resembles Arnold's pattern. The auditor's "Poor" rating creates a standard: directing TDD revenue to non-transportation purposes without explicit statutory authorization is a governance failure that the state's audit framework will document and rate accordingly.

Missouri has 204 TDDs with reportable CY2025 taxable sales data. The statewide total is $17.5 billion. The vast majority of those TDDs direct their revenue to transportation purposes as the statute intends — the Kansas City Streetcar TDDs fund streetcar operations, the retail corridor TDDs fund infrastructure improvements adjacent to their boundaries. But any TDD board that has pledged revenue to bond obligations, or that has been directing assessment revenue to city general purposes under a characterization that is not clearly "transportation," now operates in the presence of the Arnold precedent.

The practical guidance for Missouri TDD managers: if there is any ambiguity in your TDD's revenue allocation about whether the funded purposes qualify as "transportation" under the Act, obtain a formal legal opinion documenting the analysis before the next audit cycle. An audit finding of "Poor" based on the Arnold precedent, for a TDD whose board had not sought a legal opinion about its revenue allocation, is a governance failure that competent board management should have prevented.

The case for legislative action and what it requires

The auditor's recommendation to the General Assembly is directional, not mandatory. The recommendation calls for review of whether RSMo 238.200 should be amended to prevent TDD revenue from being pledged to non-transportation debt service without explicit legislative authorization. Translating a recommendation into legislation requires a sponsor, committee hearings, and floor time — each of which faces competition from other legislative priorities. The Arnold case provides the documentary foundation that reform advocates need, but it does not generate the legislative calendar entry on its own.

For practitioners who want to see TDD reform move: the most useful contribution is documented testimony about how the current ambiguity in the statute creates governance uncertainty. A TDD manager who has faced questions from property owners or city officials about whether their district's revenue allocation is compliant with the statute — questions that the statute's current language cannot definitively answer — has exactly the testimony the committee process needs to build a record for reform. The Arnold case establishes that the problem is real and significant. Practitioner testimony establishes that the problem affects the field broadly, not just the one district the auditor investigated.

Key Takeaways

Sources

Missouri State Auditor, audit report, April 6, 2026. Missouri Times, April 10, 2026. Leader Publications, June 2, 2026. Missouri DOR DI60T17 CY2025.