Exchanging currency for profit is legal in the United States. What changes everything is who you’re exchanging for. Trading foreign currency through a regulated broker for your own account carries no licensing burden. The moment you start exchanging currency for other people as a business, you enter a heavily regulated space that requires federal registration, state licensing, an anti-money laundering program, and ongoing reporting. Crossing that line without the right paperwork is a federal crime, and it doesn’t take a storefront to cross it.
Trading Currency for Your Own Profit
If you buy foreign currency as a personal investment or trade forex through a U.S. broker, you don’t need to register with anyone. The broker is the regulated entity, not you. The Commodity Futures Trading Commission oversees retail forex trading, and any firm that acts as a counterparty to off-exchange forex transactions with retail customers must register as a Retail Foreign Exchange Dealer with the CFTC and join the National Futures Association.1National Futures Association. Retail Foreign Exchange Dealer (RFED) Registration Those firms face strict capital and leverage limits. Your side of it is simpler: trade through a properly registered U.S. broker and you’re on solid legal ground. Use an unregistered offshore platform and you lose the protections regulation provides while potentially running afoul of U.S. law.
Federal rules also carve out an explicit exemption for individuals who exchange currency on an infrequent basis and not for profit,2eCFR. 31 CFR 1010.100 so a traveler converting leftover vacation money back to dollars is fine.
Running a Currency Exchange Business
Federal regulations define a “dealer in foreign exchange” as someone who accepts one country’s currency in exchange for another country’s currency in amounts greater than $1,000 for any other person on any day.2eCFR. 31 CFR 1010.100 Meet that definition and you’re a Money Services Business, which triggers a cascade of obligations.
Any business that exchanges currency for customers must register with the Financial Crimes Enforcement Network as an MSB, regardless of whether it also holds a state license.3eCFR. 31 CFR 1022.380 – Registration of Money Services Businesses Registration asks for detailed information about the company’s structure, ownership, and operations, and it must be renewed every two years.4FinCEN.gov. Money Services Business (MSB) Registration
State licensing sits on top of federal registration. Most states require a money transmitter license for businesses that exchange currency or transfer funds. Applications typically involve background checks for key personnel, minimum net worth requirements, and surety bonds. Bond amounts, capital thresholds, and fees vary widely by state, and a business operating in multiple states needs a separate license in each one.
Peer-to-Peer and Informal Exchange
This is where people get caught without realizing they were ever at risk. Exchanging currency for friends, community members, or online contacts on a regular basis looks exactly like operating a money services business to federal regulators, even without a storefront. FinCEN’s own guidance defines a currency dealer or exchanger as anyone who exchanges currency as a business for others in amounts over $1,000 per day.5FinCEN.gov. Whether a Foreign Exchange Dealer is a Currency Dealer or Exchanger No formal business entity is required. No physical location is required. At the $1,000 daily threshold for non-exempt persons, even profit motive isn’t required.
People who regularly exchange currency for others through social media, messaging apps, or in-person meetups can be prosecuted under 18 U.S.C. § 1960 for unlicensed money transmission.6Office of the Law Revision Counsel. 18 USC 1960 – Prohibition of Unlicensed Money Transmitting Businesses Charging a fair rate and dealing with people you know is not a defense.
Anti-Money Laundering and the Structuring Trap
Every registered MSB must maintain a written anti-money laundering program.7FinCEN.gov. BSA Requirements for MSBs The Bank Secrecy Act requires internal controls, employee training, independent testing, and a designated compliance officer, plus customer due diligence, transaction monitoring, and suspicious activity reporting.8Financial Crimes Enforcement Network. The Bank Secrecy Act Cash transactions exceeding $10,000 in a single day require a Currency Transaction Report, and records must be kept for five years.9eCFR. 31 CFR 1010.430
Structuring, the practice of splitting transactions into smaller amounts to duck the $10,000 reporting threshold, is a separate federal crime. It’s illegal even when the underlying money is entirely legitimate.10Office of the Law Revision Counsel. 31 USC 5324 – Structuring Transactions to Evade Reporting Requirement Prohibited A customer who makes four $3,000 exchanges on the same day, or a business that helps arrange transactions to stay under the line, can be prosecuted.
Taxes on Currency Profits
The IRS treats currency exchange profits as taxable income. The rate you pay depends on the type of transaction and the elections you make.
Section 988: The Default
Under Section 988 of the Internal Revenue Code, gains or losses from foreign currency transactions are treated as ordinary income or loss by default.11Office of the Law Revision Counsel. 26 USC 988 – Treatment of Certain Foreign Currency Transactions This covers most spot forex trades. Ordinary rates are typically higher than long-term capital gains rates, so profitable traders pay more. On the other hand, losses can offset ordinary income without the $3,000 annual cap that applies to net capital losses.
Section 1256: The 60/40 Election
Certain forex contracts qualify as Section 1256 contracts and get more favorable treatment: 60% of gains are taxed as long-term capital gains and 40% as short-term, regardless of holding period. To qualify, a foreign currency contract must require delivery of or settlement based on a foreign currency traded through regulated futures contracts, and it must be traded in the interbank market.12Office of the Law Revision Counsel. 26 USC 1256 – Section 1256 Contracts Marked to Market Taxpayers can also elect out of default Section 988 treatment for forward contracts, futures, and certain options, treating gains as capital gains, but the election has to be made before the close of the day the transaction is entered.11Office of the Law Revision Counsel. 26 USC 988 – Treatment of Certain Foreign Currency Transactions The wrong choice here is expensive to unwind.
Foreign Account Reporting
Anyone holding foreign currency in accounts outside the United States has an additional filing obligation. If the combined value of all your foreign financial accounts exceeds $10,000 at any point during the year, you must file FinCEN Form 114 (the FBAR) by April 15 of the following year, with an automatic extension to October 15.13FinCEN.gov. Report Foreign Bank and Financial Accounts Penalties for missing this filing are steep: up to $16,536 per report for non-willful violations, and the greater of $165,353 or 50% of the account balance for willful failures. Criminal penalties can reach $250,000 in fines and five years in prison.
Penalties for Getting It Wrong
Failing to register as an MSB with FinCEN carries a civil penalty of up to $5,000 for each day the violation continues.14Financial Crimes Enforcement Network. Enforcement Actions for Failure to Register as a Money Services Business An operation running unregistered for months can accumulate six-figure liability before regulators show up.
Operating an unlicensed money transmitting business is a federal crime carrying up to five years in prison. Under 18 U.S.C. § 1960, you can be convicted for operating without the required state license whether or not you knew a license was necessary.6Office of the Law Revision Counsel. 18 USC 1960 – Prohibition of Unlicensed Money Transmitting Businesses
Willful violations of the Bank Secrecy Act itself carry fines up to $250,000 and imprisonment up to five years. When the violation is part of a pattern of illegal activity involving more than $100,000 in a twelve-month period, the maximums double to $500,000 and ten years. Courts can also order forfeiture of profits.15Office of the Law Revision Counsel. 31 USC 5322 – Criminal Penalties
Operating Across Borders
Currency exchange rules vary substantially outside the United States. Businesses operating across borders have to comply with the rules in every jurisdiction where they have customers, not just where they’re physically located. For U.S. persons, the FBAR filing requirement applies to foreign accounts regardless of where the account is held or what currency it contains.13FinCEN.gov. Report Foreign Bank and Financial Accounts Using an offshore setup does not remove your U.S. reporting obligations.