McCulloch v. Maryland
The Supreme Court unanimously ruled that Congress had the power to create the Bank of the United States and that Maryland had no right to tax it — two of the most far-reaching constitutional rulings in American history.
The decision established that the federal government may use any appropriate means to carry out its constitutional duties, and that states cannot use their taxing power — or any other power — to interfere with how the federal government does its job.
“Let the end be legitimate, let it be within the scope of the constitution, and all means which are appropriate, which are plainly adapted to that end, which are not prohibited, but consist with the letter and spirit of the constitution, are constitutional.”
Chief Justice Marshall's statement of the governing test for whether Congress may use a particular means to carry out its constitutional powers.
Why this is a landmark case
McCulloch v. Maryland set the basic terms of American federalism by giving a broad reading to federal power. Maryland had tried to tax the Baltimore branch of the Second Bank of the United States, raising two questions: whether Congress could charter a national bank at all, and whether a state could tax it. Chief Justice Marshall answered yes and no.
Marshall held that even though the Constitution does not expressly authorize a national bank, Congress has implied powers under the Necessary and Proper Clause to choose appropriate means for carrying out its enumerated powers: 'Let the end be legitimate... and all means which are appropriate, which are plainly adapted to that end... are constitutional.' He then held that Maryland could not tax the federal bank, reasoning that 'the power to tax involves the power to destroy' and that federal law is supreme over conflicting state action.
The decision is foundational because it rejected a cramped, states'-rights reading of national authority and supplied the constitutional logic for the modern federal government—from the New Deal to today's regulatory and spending programs. It remains a touchstone whenever the Court weighs the scope of congressional power, and Marshall's framework was invoked, for example, in the 2012 challenge to the Affordable Care Act.
The Case in Depth
What happened
Maryland passed a law taxing the Baltimore branch of the Bank of the United States — a federally chartered bank Congress had created to manage the young nation's finances. James McCulloch, the bank's cashier, refused to pay the tax. Maryland sued him in its own courts and won. The case raised two basic questions: did Congress have the power to create the bank in the first place, and could a state tax a federal institution?
The question before the Court
Did Congress have the power to create a national bank even though the Constitution doesn't mention one, and could a state tax that bank?
The Court's answer
Yes and No. The Court unanimously ruled that Congress did have the power to create the Bank of the United States, even though the Constitution does not mention a bank by name. The Constitution gives Congress broad powers — to collect taxes, borrow money, regulate commerce, and wage war — and the Necessary and Proper Clause allows Congress to use any appropriate means to carry out those powers. A national bank is an appropriate tool for managing the nation's finances, so chartering one falls well within Congress's authority.
On the second question, the Court ruled that Maryland could not tax the Bank. The Bank was a federal institution created to carry out federal powers, and allowing a state to tax it would give states the power to destroy something the federal government has the constitutional right to create. The Constitution makes federal law supreme over state law, and a state cannot use its taxing power to interfere with how the federal government carries out its constitutional functions. Maryland's tax was therefore void.
Curious how the Court got there? See the step-by-step legal reasoning →
How the Court got there
The legal reasoning, step by step
- The Court began by recognizing that the federal government is a government of enumerated powers — Congress can only do what the Constitution authorizes. But the Constitution does not require every power to be spelled out in detail: it lists broad objectives (taxing, borrowing, regulating commerce, waging war) and was designed to be a flexible framework, not an exhaustive legal code. The Court famously noted that 'it is a constitution we are expounding,' not a statute requiring narrow, literal reading.
- The Court then interpreted the Necessary and Proper Clause — Article I's grant to Congress of power to make 'all laws necessary and proper' for carrying out its enumerated functions. Maryland argued 'necessary' meant 'absolutely indispensable,' which would have sharply limited Congress's options. The Court rejected that reading, finding that 'necessary' in common usage means 'useful,' 'conducive to,' or 'appropriate for' an end — not the single unavoidable means without which the goal could not be reached at all.
- The Court articulated the governing test for implied congressional power: if the end (the goal Congress is pursuing) is legitimate and within the Constitution's scope, and the means chosen are appropriate to that end, are not prohibited, and are consistent with the Constitution's letter and spirit, then the means are constitutional. Congress need not choose the most direct or minimally sufficient path — it may choose the most convenient and effective one.
- Turning to the bank specifically, the Court found it obvious that a national bank is an appropriate and useful instrument for carrying out Congress's fiscal powers — collecting revenue, disbursing funds across a vast country, borrowing money. The degree of necessity was a question for Congress to weigh, not the courts. The unanimous Court held that the act chartering the Bank was a valid law made in pursuance of the Constitution.
- On Maryland's power to tax the Bank, the Court applied the Supremacy Clause — the constitutional rule that federal law is the supreme law of the land and overrides inconsistent state law. From this the Court drew a core principle: the power to tax is the power to destroy, and if states could tax federal instruments without limit, they could effectively nullify the federal government's ability to act.
- The Court held that the people of a single state cannot, through their state government, exercise control over institutions created by the people of all states for the benefit of all. A state's sovereignty does not extend to the means Congress uses to carry out powers granted by all the people. Maryland's tax on the Bank's operations therefore fell outside any power Maryland legitimately possessed, and was unconstitutional regardless of whether the tax had yet reached a destructive level.