M'culloch v. State of Maryland
The Court ruled that Congress had the constitutional power to create a national bank, even though the Constitution never mentions banks, because Congress may use any reasonable means to carry out the powers the Constitution does give it.
The Court also ruled that Maryland could not tax the bank's Baltimore branch, holding that a state cannot use its taxing power to interfere with a legitimate operation of the federal government, because federal law is supreme over conflicting state law.
“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.”
The Court's core test for when a law falls within Congress's implied powers.
How it got here: Maryland's state courts, including the Court of Appeals, ruled for the state and against McCulloch, who then brought the case to the Supreme Court.
The Case in Depth
What happened
James McCulloch worked as a cashier at the Baltimore branch of the Second Bank of the United States, a bank chartered by Congress. Maryland passed a law taxing any bank operating in the state that had not been chartered by Maryland itself, aiming at this federally chartered bank. McCulloch refused to pay the tax, and Maryland sued to collect it, arguing the state had every right to tax business conducted within its borders.
The question before the Court
Could Congress create a national bank, and could Maryland tax the bank's local branch without violating the Constitution?
Why it matters
The ruling gave Congress broad flexibility to choose the tools it uses to run the government, well beyond a short list of named powers, shaping how much authority the federal government has ever since. It also blocked states from using taxes or similar tools to undermine federal institutions, cementing that federal law wins when it genuinely conflicts with state law.
What changes now
The decision was final on the merits; the Supreme Court itself entered judgment for McCulloch rather than sending the case back for further proceedings, reversing the Maryland courts' rulings. The bank's Baltimore branch could continue operating free of the state tax, and the broader reasoning about Congress's implied powers and federal supremacy over conflicting state laws became a lasting reference point for later disputes between federal and state authority.
What this does not decide
The Court made clear it was not deciding whether states could tax real property owned by the bank alongside other property in the state, or a tax on individual citizens' financial interest in the bank. It also disclaimed any power to judge how much discretion Congress used in picking its means, so long as the end was legitimate and the means were not prohibited.
How the Court got there
The legal reasoning, step by step
- The Court first asked whether Congress has the power to create a corporation like a bank even though the Constitution's list of enumerated powers never mentions banks or corporations.
- The Court read the Necessary and Proper Clause, which lets Congress pass laws needed to carry out its other listed powers, as granting Congress real discretion — 'necessary' means useful or convenient, not literally indispensable.
- Applying that reading, the Court concluded that a bank was an appropriate tool for exercising Congress's acknowledged powers to tax, borrow money, and regulate commerce, so chartering one fell within Congress's authority even without being named outright.
- Turning to Maryland's tax, the Court applied the Constitution's Supremacy Clause, which makes valid federal law override conflicting state law, reasoning that 'the power to tax involves the power to destroy' and so a state tax aimed at a legitimate federal institution threatens to undo what Congress is entitled to create.
- Because allowing a state to tax an instrument of the federal government would let a part of the union control the whole, the Court held that a state may not tax the operations of a constitutionally valid federal institution.