Comerica wire transfers: domestic and international reference

Domestic versus international wires

Domestic and international Comerica wire transfers share the same underlying mechanism — a direct bank-to-bank funds movement — but differ in the identifiers required, the processing timeline, and the fee structure.

A domestic Comerica wire transfer uses the Fedwire system, the Federal Reserve's real-time gross settlement network. Fedwire processes domestic wires on a same-day basis during business hours, which means a wire submitted before Comerica's daily cut-off time reaches the beneficiary bank the same day. The sender needs Comerica's ABA routing number for wires, the receiving bank's ABA routing number, the beneficiary's account number, and the beneficiary's full legal name. A brief wire memo is advisable — it appears on the receiving end and helps the beneficiary match the payment to an invoice or transaction.

International Comerica wire transfers route through the SWIFT network, which connects over ten thousand financial institutions globally. SWIFT wires require the receiving bank's SWIFT/BIC code — an eight or eleven character identifier that specifies the bank, country, city, and optionally the branch. In addition to the SWIFT/BIC code, international wires require the account holder's full name, account number or IBAN (depending on the destination country's banking system), and the beneficiary bank's full name and address. Missing or incorrect information on an international wire is the most common cause of delays and returned wires, so confirming the exact beneficiary details before initiating is worth the extra minutes.

A further complication on international wires is correspondent banking. If Comerica does not have a direct banking relationship with the destination bank, the wire routes through one or more correspondent banks. Each correspondent may deduct a processing fee from the principal amount, which means the beneficiary may receive slightly less than the amount sent. For businesses sending regular international payments to the same counterparty, this correspondent fee structure is worth confirming with Comerica's international banking team so the payment amount can be sized to cover anticipated deductions.

Wire fee structure

Comerica wire fees are charged per wire and differ by direction (outgoing versus incoming) and destination (domestic versus international). Business relationship accounts may qualify for reduced fee schedules.

The basic structure across US regional banks positions outgoing international wires as the highest-fee category, outgoing domestic wires as mid-range, and incoming wires (both domestic and international) at lower per-wire amounts. Comerica follows this general pattern. The exact dollar amounts are published in the bank's current fee schedule and updated periodically, so citing specific figures in a reference document like this one would become stale quickly — a relationship banker or branch can provide the current schedule.

For businesses that send wires regularly, negotiating a reduced per-wire fee through the relationship banking structure is a standard conversation. Analyzed business checking accounts in particular are designed for high-volume payment users and use an earnings-credit mechanism that can offset wire fees based on the account balance. If wire costs are a meaningful line item in a business's monthly banking expense, an analyzed account conversation with a Comerica relationship banker is worth having before committing to a standard fee schedule.

The CFPB's overview of wire transfers provides a straightforward explanation of how wires work and what disclosures US banks are required to provide before executing consumer wire transfers. Business wires operate under a similar but distinct regulatory framework, which a Comerica relationship banker can explain in the context of a specific business relationship.

Cut-off times

Wire cut-off times determine whether a wire submitted on a given business day processes same-day or rolls to the next business day, and the domestic and international cut-off times differ.

Domestic wire cut-off times at Comerica are structured to align with the Fedwire system's operating window, which runs Monday through Friday on Federal Reserve business days. The bank sets its internal cut-off somewhat before the Fedwire close to allow processing time. A domestic wire submitted in the morning has no cut-off concern; a wire submitted in the mid-to-late afternoon is close to the cut-off and may require specific attention to timing. The Business Connect platform displays the applicable cut-off context when a wire is being built, which helps users avoid inadvertently queuing a time-sensitive wire past same-day processing.

International wire cut-off times are typically earlier in the business day than domestic cut-offs, reflecting the additional processing steps (SWIFT message routing, correspondent bank intermediation, and time zone differences at the destination). A business that regularly sends international wires should build a practice of submitting those wires before mid-morning to provide the most processing runway.

Wires submitted on weekends, federal holidays, or days when the Federal Reserve is closed process on the next Federal Reserve business day. For time-sensitive payments — real estate closings, tax deposits, supplier payments with a hard deadline — the sender should verify the next-business-day calendar before relying on a specific delivery date.

Routing and SWIFT/BIC identifiers

The correct identifier setup is the first prerequisite for any Comerica wire, and the distinction between ACH routing numbers and wire routing numbers trips up first-time wire senders more often than any other single issue.

Comerica uses state-specific ABA routing numbers, and the routing number that appears on a Comerica check is the ACH routing number for that state. For most accounts, the wire routing number is the same as the ACH routing number, but this should be confirmed — some banks use a different routing number for Fedwire versus ACH, and providing the wrong one causes the wire to fail or route to the wrong destination. The routing number page on this reference site covers how to locate the correct Comerica routing number for both ACH and wire purposes.

Comerica's SWIFT/BIC code is the identifier that foreign banks and international counterparties need to send a wire to a Comerica account. The SWIFT/BIC code does not appear on a check or in standard consumer account documentation; it is typically obtained from Comerica directly, from a branch, or from the Business Connect platform's incoming wire instructions section. Providing the SWIFT/BIC code to an international supplier or counterparty once and storing it in a template or contact record eliminates the need to re-confirm it before every international payment.

Security best practices for wire transfers

Wire transfers are final once sent — unlike ACH payments, which carry a limited recall window, most domestic wires cannot be recalled after the receiving bank has credited the account. Security discipline before initiating any wire is essential.

Business email compromise (BEC) fraud is the most significant wire-fraud vector for business customers. The attack pattern is well-established: an attacker gains access to a vendor's or executive's email account, then sends a modified invoice or payment instruction with changed bank details. The business finance team, seeing a request that looks credible, sends a wire to the attacker's account. Comerica's dual-control wire approval in Business Connect creates an internal checkpoint that requires a second authorized person to approve any outgoing wire, but that control only catches an internally-originated mistake. An instruction arriving from outside — from a vendor, a counterparty, or an impersonated executive — still requires the payment team to verify by a separate channel before acting.

The verification discipline is straightforward: if a wire beneficiary's account details change, call the counterparty at a phone number obtained from a prior communication or a public directory (not from the email or invoice that announced the change) to confirm the new details before submitting the wire. This single practice stops the vast majority of BEC wire fraud attempts. The FTC's guidance on business email compromise is a useful reference for building a formal wire-authorization policy.

Additional controls worth implementing alongside Business Connect's dual-approval: a defined dollar threshold below which only one approval is needed and above which two are required; a prohibition against initiating wires based solely on email instructions without phone confirmation; and a regular review of the authorized wire-initiator list so that former employees or contractors no longer appear as active users.