To buy fiat currency, you open an account with a bank, licensed currency exchange, or registered digital platform, pass an identity check, fund the account, and place an order for the currency you want. The mechanics are simple. What separates a good purchase from an expensive one is knowing which venue charges what, how you’re moving the money in, and whether the transaction triggers a tax bill you didn’t see coming.
Where to Buy
Your venue determines most of your cost. Four routes cover almost every situation.
Banks and Credit Unions
Your own bank is usually the cheapest starting point for buying foreign currency. Banks typically mark up the exchange rate by about 2 to 3 percent over the interbank rate (the wholesale rate banks use when trading with each other). Many banks let you order foreign currency online for branch pickup or home delivery, and some waive service fees for account holders. Selection is narrower than at a specialist, and turnaround is slower.
Currency Exchange Kiosks and Bureaus
Airport kiosks and tourist-area bureaus hand you cash on the spot, and you pay for the convenience. Markups at airport locations commonly run 8 to 14 percent above the interbank rate. On a $1,000 exchange, that’s $80 to $140 lost to the markup alone. If you need physical foreign currency for a trip, ordering from your bank in advance almost always beats the airport counter.
Cryptocurrency Exchanges
If you hold Bitcoin, Ethereum, or other digital assets and want to convert them into dollars, euros, or another government-backed currency, centralized crypto exchanges are the standard route. You sell the crypto, the exchange credits your account with fiat, and you withdraw to a linked bank account. Exchanges that facilitate these conversions must register with FinCEN as money services businesses and comply with the same anti-money laundering rules as traditional financial institutions.1FinCEN. Advisory on Illicit Activity Involving Convertible Virtual Currency Trading fees generally range from 0.5 to 2 percent per transaction, and the spread between buy and sell prices adds a hidden layer on top.
Peer-to-Peer Marketplaces
Peer-to-peer platforms match individual buyers and sellers directly. Payment methods are more flexible (bank transfer, payment apps, sometimes cash), but counterparty risk is higher and dispute resolution is limited. These work best for experienced users comfortable with escrow mechanics.
What You’ll Need to Verify Your Identity
Every regulated venue must confirm who you are before letting you transact. The requirement comes from the Bank Secrecy Act, which tasks FinCEN with preventing money laundering and terrorism financing through the U.S. financial system.2Office of the Law Revision Counsel. 31 USC 5311 – Declaration of Purpose
Under the Customer Identification Program rules, a bank or exchange must collect four pieces of information before opening your account: your full legal name, your date of birth, a residential or business street address, and a taxpayer identification number (typically your Social Security number). To verify that information, the institution will ask for an unexpired government-issued photo ID such as a driver’s license or passport.3eCFR. 31 CFR 1020.220 – Customer Identification Programs for Banks
A common misconception is that federal law specifically requires a recent utility bill or lease. The regulation actually leaves the verification method up to the institution. Some banks and exchanges ask for utility bills or bank statements as an extra check, but that’s an internal policy choice, not a federal mandate. What matters is that your name, address, and identification number match exactly across every document you submit. Typos or mismatched details trigger manual review and can freeze your account for days.
Funding Methods and What They Cost
How you move money into the account changes both cost and speed.
- ACH transfer is typically free and takes one to three business days to clear. Cheapest option when timing isn’t urgent.
- Wire transfer often arrives the same day, but banks commonly charge $25 to $50 for an outgoing domestic wire. Some exchanges add a receiving fee. Wires make sense for large transactions where speed justifies the cost.
- Debit card funds show up almost instantly, with convenience fees typically running 1.5 to 3.5 percent. On a $5,000 purchase, that’s $75 to $175 before any trading commission.
If you’re buying foreign currency for travel and plan to use a credit or debit card abroad instead of carrying cash, check whether your card charges a foreign transaction fee. Most cards assess 1 to 3 percent on every purchase made in a foreign currency, which adds up fast over a two-week trip. Cards marketed as travel cards often waive the fee entirely.
Placing the Order
Once your account is funded, the purchase itself takes minutes. On digital platforms you typically choose between two order types. A market order executes immediately at the current best available price; you’re prioritizing speed over price precision. A limit order lets you set the maximum price you’ll pay (or the minimum you’ll accept when selling), and only fills if the market reaches that level. Price control, no execution guarantee.
For a straightforward purchase where you need the money now, a market order is usually the right call. Limit orders earn their keep when you’re converting a large amount and a fraction of a percent represents real money.
When your funds actually arrive depends on the route. Physical cash at a bank or exchange counter is delivered on the spot. ACH withdrawals from a digital exchange to a bank account typically take one to three business days; wires may arrive the same day. If you’re trading currency through a brokerage account, standard securities settlement moved from two business days (T+2) to one business day (T+1) on May 28, 2024.4U.S. Securities and Exchange Commission. SEC Chair Gensler Statement on Upcoming Implementation of T+1
Verify the final amount against your original quote before confirming. Rates can shift between the moment you review the price and the moment you tap the button, particularly in volatile hours. The confirmation should itemize the exchange rate applied, any spread, and all fees.
Taxes You May Owe
This is where first-time buyers get caught. The rules depend on whether you’re selling crypto for cash or exchanging one national currency for another.
Selling Cryptocurrency for Fiat
The IRS treats cryptocurrency as property, and selling it for U.S. dollars or any other fiat is a taxable event. You must recognize a capital gain or loss on the sale.5Internal Revenue Service. Frequently Asked Questions on Virtual Currency Transactions Held for a year or less, any profit is taxed as short-term capital gains at your ordinary income rate, which ranges from 10 to 37 percent. Held longer than a year, you qualify for long-term capital gains rates of 0, 15, or 20 percent depending on your income. Starting in 2026, crypto brokers must report transactions to the IRS on Form 1099-DA, so the agency will have independent records of your trades whether you report them or not.
Exchanging One Foreign Currency for Another
If you bought euros for a trip and later convert unused euros back to dollars at a better rate, the profit is technically taxable under Section 988 of the tax code, which treats foreign currency gains as ordinary income. The law carves out a practical exception for personal transactions: if your gain from the exchange is $200 or less, you owe nothing.6Office of the Law Revision Counsel. 26 USC 988 – Treatment of Certain Foreign Currency Transactions Most travelers never cross that line. For business-purpose exchanges, the full gain is taxable as ordinary income with no $200 cushion.
Large Cash and Foreign Account Reporting
Any business that receives more than $10,000 in cash in a single transaction (or related transactions) must file Form 8300 with the IRS within 15 days.7Internal Revenue Service. Form 8300 and Reporting Cash Payments of Over $10,000 This applies to currency dealers, car dealerships, jewelers, and any other trade or business handling large cash payments.
Separately, if you hold financial accounts outside the United States and their combined value exceeds $10,000 at any point during the year, you must file a Report of Foreign Bank and Financial Accounts (FBAR) by April 15 of the following year, with an automatic extension to October 15.8Internal Revenue Service. Report of Foreign Bank and Financial Accounts (FBAR) Penalties can be severe, and they apply even to non-willful violations. This matters if you keep foreign currency in overseas bank accounts or use foreign-based platforms that hold your funds abroad.
How Safe Is Your Money After You Buy It
Where you park the fiat afterward determines what happens if the institution holding it fails.
Cash in a checking or savings account at an FDIC-insured bank is protected up to $250,000 per depositor, per bank, per ownership category.9Federal Deposit Insurance Corporation. Deposit Insurance FAQs That’s the strongest protection available for fiat holdings.
Cash in a brokerage account at a SIPC-member firm gets a different form of coverage. If the brokerage fails, SIPC covers up to $500,000 in total assets, with a $250,000 sublimit for cash. Coverage extends to cash denominated in foreign currencies but does not cover cash held for commodities trades.10SIPC. What SIPC Protects
Fiat sitting on a cryptocurrency exchange is the riskiest position. FDIC insurance does not cover deposits held by non-bank entities, and that includes crypto exchanges, wallet providers, and neobanks that aren’t themselves insured banks.11Federal Deposit Insurance Corporation. Fact Sheet: What the Public Needs to Know About FDIC Deposit Insurance and Crypto Companies Some exchanges partner with insured banks to hold customer fiat in FDIC-eligible accounts; others do not. If an exchange goes bankrupt, your fiat balance may be treated as an unsecured creditor claim. Before leaving significant cash on any platform, verify exactly where those funds are held and whether deposit insurance actually applies to your balance.