BMO Bank’s US customer service number is 1-888-340-2265. Phone support hours are Monday–Friday 7:00 AM–9:00 PM CT and Saturday–Sunday 8:00 AM–6:00 PM CT. BMO also offers in-app chat and a virtual assistant (BMO Bot) for 24/7 self-service.
BMO Bank Contact Options
| Channel | Contact | Hours |
|---|---|---|
| Phone | 1-888-340-2265 | Mon–Fri 7AM–9PM CT; Sat–Sun 8AM–6PM CT |
| Lost/stolen card | 1-888-340-2265 | 24/7 |
| Chat | bmo.com / BMO app | Extended hours |
| BMO Bot (virtual) | bmo.com | 24/7 |
| Secure message | Online banking | 24/7 send; 1–2 day reply |
| Branches | ~500 US locations | Typically Mon–Fri 9AM–5PM |
Phone Support Hours (CT)
| Day | Hours |
|---|---|
| Monday–Friday | 7:00 AM – 9:00 PM |
| Saturday | 8:00 AM – 6:00 PM |
| Sunday | 8:00 AM – 6:00 PM |
BMO offers Saturday and Sunday phone support — more coverage than Huntington (Saturday only) or Fifth Third (Saturday only).
Bank of the West Migration Support
Former Bank of the West customers who have questions about the 2023 BMO migration — account numbers, routing number changes, debit card replacements — can call 1-888-340-2265. BMO maintained dedicated migration support during the transition.
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