A money transfer works by sending payment instructions from one bank to another over a shared network; both banks verify the details, screen the transaction for compliance, and then adjust their balances against each other so the sender’s account goes down and the recipient’s account goes up. No cash physically moves. The whole cycle breaks into two phases: clearing, where the instructions are verified, and settlement, where value actually changes hands between the banks. How long that takes and what it costs depends almost entirely on which network carries the message.
The Networks That Carry the Transfer
Banks don’t call each other up to move money. They route messages through specialized networks, and the network chosen depends on the amount, the urgency, and whether the payment crosses a border.
The Automated Clearing House (ACH) is the workhorse of U.S. payments. It handles payroll, bill pay, and most routine bank-to-bank transfers by collecting individual transactions into batches and running them through a central operator. The Federal Reserve runs one of the two ACH operators, and a private entity called EPN runs the other.
Fedwire is the Federal Reserve’s real-time gross settlement system. Each transfer settles individually and immediately rather than waiting for a batch, and once a Fedwire transfer is processed it is final and irrevocable.1Board of Governors of the Federal Reserve System. Fedwire Funds Services That finality is why Fedwire is the standard choice for large, time-sensitive payments like real estate closings.
The FedNow Service, launched in July 2023, also settles payments individually and instantly, but it runs around the clock and is built for everyday payments rather than just high-value corporate transfers. As of late 2025, its network transaction limit is $10 million.2Federal Reserve Financial Services. Customer Credit Transfer and Liquidity Management Transfer Network Limit Increases A FedNow payment puts money in the recipient’s account within seconds, and the recipient can spend it immediately.3Board of Governors of the Federal Reserve System. FedNow Service Frequently Asked Questions
For international transfers, banks typically communicate through SWIFT, the Society for Worldwide Interbank Financial Telecommunication. SWIFT itself doesn’t move money; it carries the encrypted messages that tell banks what to do.4Swift. Payments The actual settlement between countries happens separately, often through correspondent banking relationships where banks hold accounts at each other’s institutions.
Clearing and Settlement: The Two Phases
Clearing is the information phase. The sending bank transmits the payment instructions to the network, and the receiving bank verifies that the account exists, the name matches, and the details are valid. No money moves yet.
For ACH, clearing happens in batches. Your bank collects all its outgoing ACH payments and submits them to the ACH operator at scheduled intervals throughout the day. The operator sorts these transactions and delivers them to the receiving banks, which match account numbers and flag any problems. Regulation E governs how financial institutions must handle errors discovered during this process, including the timelines for investigating consumer disputes.5Consumer Financial Protection Bureau. 1005.11 Procedures for Resolving Errors
For Fedwire and FedNow, clearing and settlement happen almost simultaneously. The sending bank transmits the instruction, the Federal Reserve validates it, and the funds move in the same step, because the system confirms sufficient reserves in real time.
Settlement is the moment value changes hands between the banks. Still no armored trucks. The Federal Reserve adjusts the reserve accounts that banks keep with it: the sending bank’s balance goes down, and the receiving bank’s balance goes up. Private clearinghouses use the same netting idea through their own settlement accounts. ACH settlement works on a net basis. After a batch clears, the clearinghouse calculates the total each bank owes every other bank and settles the difference in a single transfer. A thousand individual payments between two banks might result in just one settlement transaction, which is why ACH fees are so low.
How Long Each Method Takes
The gap between the slowest and fastest methods is dramatic:
- Fedwire settles in minutes during business hours, and each transfer is final and irrevocable once processed.1Board of Governors of the Federal Reserve System. Fedwire Funds Services
- FedNow settles in seconds, 24 hours a day, 365 days a year, with funds immediately available to the recipient.3Board of Governors of the Federal Reserve System. FedNow Service Frequently Asked Questions
- Same Day ACH settles within the same business day if submitted before the cutoff times, with a $1 million per-payment limit.6Federal Reserve Financial Services. Same Day ACH Resource Center
- Standard ACH mostly settles the next business day. ACH debits cannot settle more than one banking day out, and ACH credits cannot settle more than two. The old “3 to 5 business days” line is largely a myth; roughly 80% of ACH volume settles within one banking day.7Nacha. The Significant Majority of ACH Payments Settle in One Business Day or Less
- International wires through SWIFT typically take one to five business days, depending on the number of correspondent banks involved, time zones, and compliance reviews in each country.
What Transfers Cost
The cost differences are just as wide. Standard ACH transfers are free or near-free for consumers at most banks. Domestic wire transfers typically cost $15 to $30 to send and $10 to $20 to receive, though some banks charge nothing for incoming wires. International wires are the most expensive, often running $35 to $50 for the sender, with possible intermediary bank fees deducted along the way.
International transfers also carry a hidden cost that the fee schedule won’t show you: the exchange rate markup. Traditional banks commonly add a 2% to 5% spread above the mid-market exchange rate, which on a $10,000 transfer could mean $200 to $500 in invisible costs. Fintech transfer services have compressed these margins, with many charging under 1%. If you send money abroad regularly, the exchange rate matters far more than the stated wire fee.
The Compliance Checks You Don’t See
Before your transfer moves a single dollar, both banks run it through automatic compliance checks. These are a big reason transfers sometimes take longer than the network’s raw speed would suggest.
Every bank must maintain a Customer Identification Program under the Bank Secrecy Act. When you opened your account, the bank collected your name, address, date of birth, and identification number specifically so it could verify your identity for future transactions.8eCFR. 31 CFR 1020.220 – Customer Identification Program Requirements for Banks When you initiate a transfer, the bank matches your instructions against those records.
Banks also screen both the sender and recipient against the Office of Foreign Assets Control (OFAC) sanctions list before processing any transfer. If a name matches a sanctioned person, entity, or country, the bank must block the transaction, hold the funds in an interest-bearing account, and report the match to OFAC within 10 business days.9U.S. Department of the Treasury. Blocking and Rejecting Transactions If the transaction is prohibited but doesn’t involve a blocked party, the bank rejects it and returns the funds to the sender. Wire transfers, ACH payments, and international transactions all get screened.10FFIEC. Office of Foreign Assets Control
When a bank spots an unusual pattern, such as a sudden large transfer to a country with weak financial controls, it may file a Suspicious Activity Report and hold the transaction while it investigates. These delays can last hours or days, and the bank is not allowed to tell you a report has been filed. That’s often the real reason a transfer gets held for “additional review.”
What You Need to Provide
Precision here matters more than speed. Getting one digit wrong can delay a transfer by days or route money to the wrong account. For a domestic transfer within the United States, you need three pieces of information about the recipient: their full legal name as it appears on the account, their bank’s nine-digit ABA routing number, and their account number.11American Bankers Association. ABA Routing Number The routing number identifies which bank receives the funds; the account number tells that bank whose ledger to credit. Both appear on paper checks and in most mobile banking apps.
International transfers need more. A SWIFT/BIC code (Business Identifier Code) locates the recipient’s bank anywhere in the world.12Swift. Business Identifier Code (BIC) Many countries, particularly in Europe, the Middle East, and parts of Asia, also require an IBAN (International Bank Account Number), a standardized format that bundles the country code, bank identifier, and account number into one string.13Swift. International Bank Account Number (IBAN) Sending money to an IBAN country without one will usually cause the transfer to bounce back.
The protections for a wrong account number are limited. The Electronic Fund Transfer Act and Regulation E require sending institutions to attempt recovery or issue a refund for remittance transfers, but for standard domestic wires you are largely relying on the receiving bank’s cooperation.14Consumer Financial Protection Bureau. 12 CFR Part 1005 – Electronic Fund Transfers (Regulation E) Check every number before you hit send.
When the Recipient Can Spend the Money
Once settlement is complete, the receiving bank credits the recipient’s account. For wire transfers and FedNow payments, the funds are available right away. For ACH deposits, federal law sets the outer boundary: electronic payments must be made available no later than the next business day after the bank receives both the funds and the account information.15Board of Governors of the Federal Reserve System. A Guide to Regulation CC Compliance Many banks release ACH deposits earlier, especially payroll.
The Expedited Funds Availability Act and its implementing Regulation CC set the maximum hold periods for all types of deposits, and for electronic transfers the rules are generous, with next-business-day availability as the standard.16eCFR. 12 CFR Part 229 – Availability of Funds and Collection of Checks (Regulation CC) Banks can impose longer holds under exception circumstances such as new accounts, very large deposits, or reasonable cause to doubt collectibility, but they must notify you in writing when they do. Once the balance updates, the money behaves like any other funds in the account, and the transfer cycle is done.
If Something Goes Wrong
The rules for fixing a mistake depend on which type of transfer you used, and the differences are stark. A completed Fedwire transfer is final and irrevocable.1Board of Governors of the Federal Reserve System. Fedwire Funds Services If you wire money to the wrong account or fall victim to a scam, your bank can ask the receiving bank to return the funds, but if the recipient has already withdrawn the money, your recourse is very limited. There is no federal guarantee that gets your money back.
For an international remittance sent through a money transfer provider, you have at least 30 minutes after paying to cancel for a full refund, including all fees, and the provider must honor this window regardless of its normal business hours.17Consumer Financial Protection Bureau. Comment for 1005.34 – Procedures for Cancellation and Refund of Remittance Transfers
If an unauthorized electronic transfer comes out of your account, your liability under Regulation E depends on how quickly you report it, with a $50 cap if you report within two business days, a $500 cap after that but within 60 days of your statement, and potentially unlimited liability after 60 days.18Consumer Financial Protection Bureau. 1005.6 Liability of Consumer for Unauthorized Transfers Reviewing your statements matters here more than most people realize.