We are here for you, 24/7

Guaranty Bank makes it easy and convenient to contact us by phone, email or in person at one of our Colorado branch locations.


24-Hour Anytime Banking

Guaranty Bank takes great pride in combining our well-established personal banking service with banking innovations. Our free 24-hour a day, 7 day a week telephone banking service features voice recognition capabilities available in English or Spanish that will guide you through your banking options.

  • 303.293.2938 - Denver Metro
  • 877.354.2265 - Toll-Free

Customer Service

Email us at CustomerCare@GuarantyBankCO.com or call our 24-hour service numbers.

  • Toll free: 1.877.609.5500
  • Denver: 303.293.5500
  • Northern Colorado: 970.454.4220

To report a lost or stolen Guaranty Bank ATM or debit card call: 800.500.1044
To report a lost or stolen Guaranty Bank credit card call: 800.558.3424

Treasury Management

Email us at TreasuryMgmt@GuarantyBankCO.com or call us.

  • 303.675.1160 - Denver Metro
  • 970.454.4240 - Northern Colorado

Report a Lost or Stolen Guaranty Bank Card

  • ATM or Debit Card: 1.800.500.1044
  • Credit Card: 1.800.558.3424
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