BMO Financial Group, also known as Bank of Montreal, is a major North American bank with its Canadian head office in Toronto and U.S. banking headquarters in Chicago. This page provides updated BMO corporate office and head office information, including Canadian and U.S. addresses, customer support phone numbers, complaint escalation routes, fraud reporting guidance, review notes, and related bank corporate office resources.
BMO Corporate Office and Head Office Contact Information
- Company: BMO Financial Group / Bank of Montreal
- Canadian Head Office / Corporate Address: 100 King Street West, 1 First Canadian Place, Toronto, ON M5X 1A1, Canada
- Corporate Secretary / Shareholder Correspondence: Bank of Montreal, 100 King Street West, 1 First Canadian Place, 9th Floor, Toronto, ON M5X 1A1
- Corporate Secretary Phone: 1-416-867-6785
- BMO Bank N.A. U.S. Headquarters: 320 S Canal St, Chicago, IL 60606
- BMO Canada Personal Banking: 1-877-225-5266
- BMO Canada Business Banking: 1-877-262-5907
- BMO Canada Credit Cards: 1-800-263-2263
- BMO U.S. General Banking / Complaint Resolution: 1-888-340-2265
- BMO U.S. Personal Credit Card Assistance: 1-855-825-9237
- Official Website: bmo.com
- BMO Canada Contact Page: BMO Canada Contact Us
- BMO U.S. Contact Page: BMO U.S. Contact Us
- BMO Complaint Handling Process: BMO Complaint Handling Process
Headquarters / Corporate Office Update
The older version of this page listed BMO’s head office address as 100 King Street West, 1 First Canadian Place, Toronto, ON M5X 1A1. That remains the correct Canadian head office area for BMO Financial Group and Bank of Montreal.
The old page also listed 1-888-340-2265 as the main office phone number for corporate inquiries and banking services. That number should be labeled more carefully. It is a BMO U.S. banking support and complaint-resolution number, not the main Canadian head office phone number.
For Canadian personal banking support, BMO lists 1-877-225-5266. For Canadian business banking support, BMO lists 1-877-262-5907. For BMO U.S. general banking support and complaint resolution, use 1-888-340-2265.
BMO Bank N.A., the U.S. bank, is headquartered at 320 S Canal St, Chicago, IL 60606. This is different from BMO Financial Group’s Canadian head office in Toronto.
How to Contact BMO About a Complaint
For most BMO complaints, start with the part of BMO that handles your account. Canadian customers should use the Canadian personal banking, business banking, credit card, branch, or relationship manager route. U.S. customers should use BMO U.S. support at 1-888-340-2265 or the support route tied to their account, card, loan, mortgage, or business service.
If the issue is not resolved, ask for a complaint reference number, case number, or written response. Keep copies of statements, screenshots, payment confirmations, emails, branch notes, chat records, fraud reports, and letters.
Choose the Correct Support Route
- BMO corporate head office or governance question: Use the Toronto head office address or the Corporate Secretary route listed above.
- BMO Canada personal banking complaint: Call 1-877-225-5266 or contact the branch or office where you normally bank.
- BMO Canada business banking complaint: Call 1-877-262-5907 or contact your relationship manager.
- BMO Canada credit card complaint: Call 1-800-263-2263.
- BMO U.S. account, card, loan, or complaint-resolution issue: Call 1-888-340-2265.
- BMO U.S. personal credit card support: Call 1-855-825-9237.
- Investor or shareholder question: Use BMO Investor Relations or Corporate Secretary contact information.
- Careers or HR question: Use the official BMO Careers website.
- Ethics, misconduct, or whistleblower concern: Use BMO’s official Speak Up / whistleblower route, not general customer support.
What to Have Before Contacting BMO
- Your country and account type, such as Canada personal banking, U.S. banking, credit card, mortgage, business banking, or wealth management
- The last four digits of the account, card, or loan involved
- Transaction date, payment date, amount, merchant, branch, or account activity involved
- Branch location, relationship manager, department, or support route already used
- Copies of statements, letters, emails, screenshots, payment confirmations, or fraud notices
- Any complaint reference number, case number, dispute number, or support ticket
- A short timeline of what happened and the resolution you are requesting
Do not post account numbers, Social Insurance Numbers, Social Security numbers, debit card numbers, credit card numbers, passwords, PINs, one-time passcodes, tax documents, wire instructions, home addresses, or private financial information in public reviews or comment sections.
How to Escalate a BMO Complaint
Start with the BMO representative, branch, relationship manager, support team, or department that normally handles your account. Ask for a complaint reference number or written acknowledgement when the complaint involves a transaction dispute, account restriction, fraud claim, credit card problem, mortgage issue, wire transfer, branch complaint, online banking issue, or business banking concern.
For Canadian customers, BMO’s complaint process includes internal escalation through the Customer Resolution Office and then the Customer Complaint Appeal Office when earlier steps do not resolve the issue. If the complaint is still unresolved after BMO’s final response or after the required waiting period, Canadian customers may be able to contact the Ombudsman for Banking Services and Investments.
For U.S. customers, BMO Bank N.A. complaints may be escalated through BMO U.S. customer complaint resolution. Depending on the issue, customers may also consider the Consumer Financial Protection Bureau, the Office of the Comptroller of the Currency, or the FDIC complaint process.
BMO Canada Head Office, Complaint Office, and OBSI Escalation
BMO Financial Group’s Canadian head office is in Toronto at 100 King Street West, 1 First Canadian Place. For corporate governance or shareholder matters, BMO lists its Corporate Secretary Department at the same address on the 9th floor.
For Canadian banking complaints, BMO’s published complaint handling process starts with sharing the concern with a BMO representative, branch, relationship manager, or normal business contact. If the issue is not resolved, customers may escalate internally through BMO’s customer complaint process.
The Customer Complaint Appeal Office is BMO’s final internal escalation step for Canadian complaints. If BMO provides a final response and the customer remains dissatisfied, or if the complaint remains unresolved after the required time period, the customer may contact OBSI. Customers should pay attention to escalation deadlines, including the 180-day limit after BMO’s final response.
BMO U.S. Headquarters and BMO Bank N.A.
BMO Bank N.A. is BMO’s U.S. banking subsidiary. BMO Bank N.A. is headquartered at 320 S Canal St, Chicago, IL 60606. The BMO Tower in Chicago serves as BMO’s U.S. headquarters.
U.S. customers should use BMO U.S. support for checking, savings, debit card, credit card, loan, mortgage, online banking, branch, fraud, or account access issues. The U.S. general banking and complaint-resolution number is 1-888-340-2265.
Fraud, Phishing, Text Scams, and Security Issues
Bank customers are frequent targets for phishing emails, fake text alerts, spoofed calls, fake bank support numbers, and search-result ads that impersonate financial institutions. Use bmo.com, the BMO mobile app, the number on your card or statement, or an official BMO contact page before sharing account information.
BMO warns Canadian customers that it will never call to ask for a one-time passcode and will never text a link. Suspicious emails or security concerns can be reported to BMO through official fraud routes. In Canada, suspicious emails can be sent to on**********@*mo.com. In the U.S., suspicious emails can be sent to bm*************@*mo.com, or U.S. customers can call 1-888-340-2265.
Accounts, Credit Cards, Mortgages, Loans, and Business Banking
BMO customers may contact the bank about checking or chequing accounts, savings, debit cards, credit cards, mortgages, personal loans, business loans, commercial banking, wire transfers, online banking, mobile deposits, account access, branch service, or wealth management.
Because BMO operates in both Canada and the United States, customers should make sure they are using the correct country-specific support route. A Canadian BMO credit card issue may not route the same way as a BMO U.S. credit card issue. Business and commercial customers should use their relationship manager or the correct business support line when available.
Scam and Fake Support Number Warning
Customers searching for BMO head office, BMO corporate office, BMO customer service, BMO Bank N.A., BMO Canada, or BMO complaint department may see third-party numbers or ads in search results. Be cautious with any caller, email, text, or website that asks for passwords, one-time passcodes, card numbers, account numbers, online banking credentials, wire instructions, gift card payments, crypto payments, or remote access to your device.
Go directly to bmo.com or use the BMO mobile app before sharing private banking information.
Common Reasons Customers Contact BMO Corporate Office
- BMO corporate office or Canadian head office questions
- BMO U.S. headquarters or BMO Bank N.A. questions
- Checking, chequing, savings, debit card, or account access complaints
- Credit card disputes, payments, fraud, or account problems
- Mortgage, loan, HELOC, or payment concerns
- Wire transfer, ACH, bill payment, or electronic transfer issues
- Branch service, relationship manager, or appointment complaints
- Online banking, mobile app, login, or password problems
- Business banking, commercial banking, or treasury management issues
- Investor relations, shareholder, careers, ethics, or corporate governance questions
BMO Reviews and Complaints
CorporateOfficeHeadquarters.com currently shows limited visible review content for BMO. One visible review complains about difficulty reaching BMO by phone, calls dropping, and disappointing customer service.
These comments reflect individual experiences and may not represent every BMO branch, country, account type, support department, or business line. When leaving a review, include whether your issue involved BMO Canada, BMO U.S., a branch, credit card, mortgage, online banking, business banking, or another department. Do not post private financial information.
About BMO
BMO Financial Group, also known as Bank of Montreal, is one of North America’s major financial institutions. BMO provides personal banking, business banking, commercial banking, wealth management, capital markets, investment services, credit cards, mortgages, loans, and digital banking.
BMO’s Canadian head office is in Toronto, Ontario. BMO Bank N.A. is headquartered in Chicago, Illinois. The bank serves customers in Canada, the United States, and select global markets.
Competitors and Related Corporate Office Pages
BMO competes with Canadian banks, U.S. banks, regional banks, credit card issuers, wealth management firms, and commercial banking providers. Related corporate office pages include RBC Corporate Office, CIBC Corporate Office, TD Bank Corporate Office, PNC Bank Corporate Office, KeyBank Corporate Office, M&T Bank Corporate Office, and Chase Corporate Office.
Related Resources
- Official BMO Canada Contact Us page
- Official BMO U.S. Contact Us page
- BMO Complaint Handling Process
- BMO Customer Resolution Office
- BMO Customer Complaint Appeal Office
- BMO Canada Scam Alerts
- BMO U.S. Report Fraud
- Submit a CFPB complaint
- OCC HelpWithMyBank Complaint Form
Frequently Asked Questions About BMO Corporate Office
Where is BMO head office located?
BMO Financial Group’s Canadian head office is at 100 King Street West, 1 First Canadian Place, Toronto, ON M5X 1A1, Canada.
Where is BMO U.S. headquarters?
BMO Bank N.A. is headquartered at 320 S Canal St, Chicago, IL 60606.
What is BMO Canada’s customer service number?
BMO Canada personal banking support can be reached at 1-877-225-5266.
What is BMO U.S. customer service number?
BMO U.S. general banking support and customer complaint resolution can be reached at 1-888-340-2265.
Is 1-888-340-2265 BMO head office?
No. 1-888-340-2265 is a BMO U.S. support and complaint-resolution number. BMO’s Canadian head office is in Toronto, and BMO’s U.S. headquarters is in Chicago.
How do I file a complaint with BMO?
Start with the branch, office, department, or support route that normally handles your account. If the issue remains unresolved, follow BMO’s complaint handling process and ask for written responses or case numbers. Canadian customers may be able to escalate internally to BMO’s Customer Resolution Office and Customer Complaint Appeal Office, then to OBSI when eligible.
How do I report BMO fraud or phishing?
Use BMO’s official fraud and security pages. In Canada, suspicious emails can be sent to on**********@*mo.com. In the U.S., suspicious emails can be sent to bm*************@*mo.com, and U.S. customers can call 1-888-340-2265.
Is BMO the same as Bank of Montreal?
Yes. BMO Financial Group is commonly associated with Bank of Montreal. BMO Bank N.A. is BMO’s U.S. banking subsidiary.
Why Trust CorporateOfficeHeadquarters.com?
CorporateOfficeHeadquarters.com provides corporate office, headquarters, address, phone number, complaint, review, and escalation information for major companies and organizations. This page was updated using official BMO, FDIC, BMO complaint-process, regulator, and COH-visible review information where available.
Page Update Note
This BMO Corporate Office page was updated on July 4, 2026, to clarify the difference between BMO’s Canadian head office and U.S. headquarters, correct the phone-number labeling for 1-888-340-2265, add Canadian and U.S. support routes, scan for a CSN link, improve complaint escalation guidance, add fraud and phishing warnings, and summarize COH-visible review content.
Disclaimer
CorporateOfficeHeadquarters.com is not affiliated with BMO Financial Group, Bank of Montreal, BMO Bank N.A., BMO Harris, the FDIC, OBSI, the CFPB, the OCC, or any regulator. This page is for informational purposes only. BMO trademarks, names, logos, products, and services are the property of their respective owners. Contact details, complaint processes, support hours, regulatory options, bank addresses, account terms, and corporate information can change. Confirm important details directly with BMO before sharing sensitive financial information or mailing documents.
Share Your Experience
Have you contacted BMO head office, BMO U.S. headquarters, BMO Canada customer support, BMO U.S. support, a local branch, credit card support, mortgage support, business banking, investor relations, or a complaint escalation office? Share your experience in the comments below. Do not post private information such as account numbers, debit card numbers, credit card numbers, Social Insurance Numbers, Social Security numbers, passwords, PINs, one-time passcodes, wire instructions, tax documents, home addresses, or personal financial screenshots.