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Attention Business Online Banking Customers: Please be advised that our Cash Management Agreement has been updated as of 5/15/2024 to a more concise and streamlined version. Upon logging into your account, you will be asked to accept the terms and conditions of this new agreement.

Browse our Security Center for tools and resources to protect your privacy and personal financial information. Find online banking security tips along with information on common scams. If you are ever in doubt, call us directly at (207) 839-4796.

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Merchant Services

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Merchant services are a great way to streamline payments and avoid cash flow disruption. Customers love our low rates, local service, and the latest technology. Discover the difference local merchant services can make for your business.

“Switching our merchant processing to GSB saved us $12,000 a year to reinvest back into growing our business—plus, we value having a local partner that’s accessible and nearby whenever we need them.” – Geraldine Ollila, Maine Laser & Aesthetics

Stars and Stripes staff smiling at each other looking over the bar.

Switch for the Rates

Stay for the Service

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Accept Multiple Payment Types

All major credit cards, debit cards (signature and/or PIN based), Electronic Benefit Transfer (EBT) payments and purchasing cards for corporate/government organizations.

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Ecommerce & Mobile Solutions

Accept payments through your website with shopping cart technology, or via your mobile device or tablet.

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Gift & Loyalty Card Programs

Gift and loyalty cards are a less expensive, more effective alternative to traditional advertising.

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Tech You Can Count On

View reports and statements online with ease. Access 24/7 technical support when you need it. QuickBooks® integration also available with some systems.


Get a complimentary statement review by completing this form, or call (207) 221-8460.

GSB Cash Management Team