California v. Texas: ACA Standing, Ruling, and What Remained

In California v. Texas, the Supreme Court dismissed the largest legal challenge to the Affordable Care Act since the law’s passage, ruling 7-2 on June 17, 2021 that the plaintiffs lacked standing to sue. Because Congress had reduced the individual mandate’s penalty to zero, no one faced enforcement, no one could show a traceable injury, and the entire ACA remained in force.¹ The Court never reached the constitutional questions the case was built around.

Why the Case Existed

The lawsuit grew out of a single line of reasoning in an earlier decision. In 2012, in National Federation of Independent Business v. Sebelius, the Supreme Court upheld the ACA’s individual mandate only because the penalty for going uninsured functioned like a tax collected by the IRS.² The Court had rejected the Commerce Clause as an alternative justification, so the mandate’s survival was tethered to that one thing: a payment the IRS actually collected.

Five years later, the Tax Cuts and Jobs Act of 2017 changed the number. Congress reduced the shared responsibility payment to zero dollars starting in tax year 2019.³ The text of the mandate stayed in the statute. Section 5000A of the Internal Revenue Code still commands that applicable individuals maintain minimum essential coverage, with the dollar amount of the penalty set at zero.⁴

That gave opponents a fresh theory. If the mandate was constitutional in 2012 only because it operated as a tax, and Congress then eliminated the tax, the mandate had lost its constitutional footing. A bare legal command to buy insurance, without any tax consequence, could not rest on the taxing power. And NFIB had already closed off the Commerce Clause.

Who Sued and Who Defended

A coalition of Republican-led states, with Texas in front, filed suit in the Northern District of Texas in 2018. Two individual plaintiffs, Neill Hurley and John Nantz, joined the case, claiming the mandate still compelled them to buy coverage they would otherwise skip.⁵ The plaintiffs argued that the unconstitutional mandate could not be severed from the rest of the ACA, so the entire law had to fall.

The federal government’s position was unusual. Under the Trump administration, the Department of Justice sided with the plaintiffs rather than defending the statute. To fill the gap, California led a coalition of 16 states and the District of Columbia in intervening to defend the ACA. That is how the caption arrived at the Supreme Court reading California v. Texas.⁵

In the district court, Judge Reed O’Connor ruled in December 2018 that the mandate was unconstitutional and that the entire ACA had to fall with it. The Fifth Circuit agreed in 2019 that the mandate could no longer be read as a tax and had no other constitutional footing, but faulted the district court’s sweeping severability analysis and sent that piece back for a more granular review.⁶ The Supreme Court took the case before that remand could play out.

Why Standing Decided the Case

Federal courts hear real disputes between parties who have been genuinely harmed. Standing under Article III has three parts: a concrete injury, an injury traceable to the challenged conduct, and a ruling that could actually redress it.⁷ Justice Stephen Breyer, writing for a majority that included Chief Justice Roberts and Justices Thomas, Kagan, Sotomayor, Kavanaugh, and Barrett, stopped there. The Court never reached whether the mandate was constitutional or whether it could be severed from the rest of the ACA.¹

The Individual Plaintiffs

Hurley and Nantz said the mandate’s text still directed them to buy coverage, and that compliance cost them money. The Court found no traceable injury. Section 5000A’s enforcement provision authorized only one thing: an IRS collection of a penalty payment. With the penalty at zero, the IRS had nothing to collect and no enforcement action to take. The insurance premiums the plaintiffs paid could not be traced to any government action, because the government was doing nothing to anyone.⁵

The State Plaintiffs

The states claimed the mandate pushed more residents into Medicaid and other state programs, and that they bore administrative costs from ACA-related reporting. The Court found no evidence the unenforceable mandate was actually driving anyone into state programs. As for the reporting costs, those obligations came from separate provisions of the ACA that operated independently of Section 5000A. Striking down the mandate would not relieve the states of those reporting duties, so a favorable ruling could not redress the harm they described.⁵

The Dissent

Justices Alito and Gorsuch dissented. They argued the majority distorted the traceability requirement by effectively demanding the plaintiffs prove their merits case at the standing stage. They pointed to concrete dollar figures the states had documented, including more than $185,000 in a single fiscal year that Missouri spent preparing coverage-reporting forms and $100,000 in ongoing costs in South Dakota, and argued that even one dollar of harm should suffice. The dissent also advanced a standing-through-inseverability theory: if the reporting rules could not be severed from an unconstitutional mandate, the states were being injured by provisions drawing their authority from an invalid source.⁵ The majority was not persuaded.

What the Court Did Not Decide

Severability was the question everyone expected the ruling to turn on, and it was the question the Court never answered. The plaintiffs had argued the mandate was the linchpin of the whole statute, and that provisions like pre-existing condition protections would collapse without it. The defending states countered that Congress itself had zeroed out the penalty in 2017 while leaving everything else in place, which strongly suggested Congress believed the rest of the law could function without an enforceable mandate.

Because the case ended at standing, the constitutional status of the zeroed-out mandate and the severability of the ACA’s provisions both remain technically unresolved. The practical answer has been supplied by events: the ACA’s insurance markets have kept operating without an enforceable mandate since 2019.

What Stayed in Place

The dismissal left the entire Affordable Care Act intact. Provisions that would have been at risk had the plaintiffs prevailed on the merits include:

Pre-existing condition protections that bar insurers from denying coverage or charging more based on health history.
Premium tax credits that reduce costs for people buying coverage through the federal or state marketplaces.
Federal funding for states that expanded Medicaid eligibility under the ACA.
Dependent coverage that lets young adults stay on a parent’s plan until age 26.
Essential health benefit requirements covering categories like hospitalization, prescription drugs, and mental health services.

State Mandates Are a Separate Matter

The federal penalty sits at zero, but that is not the whole map. Five states and the District of Columbia have enacted their own individual health insurance mandates, and several carry real financial penalties administered through state tax returns rather than the IRS. California’s penalty, for example, is the higher of $900 per adult or 2.5% of household income above the state tax filing threshold, with exemptions for situations like coverage costs exceeding a set percentage of income, short coverage gaps of three months or less, membership in certain religious groups, and enrollment in tribal health programs.⁸ Vermont has a mandate on the books with no penalty. If you live in a state with its own mandate, that obligation is unaffected by California v. Texas.

Why the Case Still Matters

California v. Texas resolved less than the headlines suggested. The Court did not declare the zeroed-out mandate constitutional or unconstitutional, and it did not rule on severability. It said only that these plaintiffs, at this moment, had not been harmed in a way traceable to this provision.

That leaves the case cutting two ways. For supporters of the ACA, it was the third major Supreme Court challenge the law survived, and the durability of the statute now has a long track record. For critics, the constitutional questions the majority sidestepped are still open, and a future plaintiff with a more concrete injury tied to a different provision could bring related arguments back to the courts.

The ruling also reinforced a point about federal litigation that reaches beyond healthcare. Standing is not a formality courts brush past to get to important questions. When Congress zeroed out the penalty, the government stopped doing anything to anyone under Section 5000A, and a lawsuit built on that provision had no injured party to carry it forward.

1
Congress.gov. Supreme Court Dismisses Challenge to the Affordable Care Act in California v. Texas
2
Justia Law. National Federation of Independent Business v. Sebelius
3
Internal Revenue Service. Questions and Answers on the Individual Shared Responsibility Provision
4
Office of the Law Revision Counsel. 26 USC 5000A – Requirement to Maintain Minimum Essential Coverage
5
Supreme Court of the United States. California v. Texas
6
United States Court of Appeals for the Fifth Circuit. Texas v. California, No. 19-10011
7
Constitution Annotated. ArtIII.S2.C1.6.1 Overview of Standing
8
State of California Franchise Tax Board. Health Care Mandate