Contact Us

csONE Benefit Solutions

Two Delta Drive, Suite 301
PO Box 1320
Concord, NH 03302-1320
Main Line: 1 603 227-2000
Toll Free: 1 888 227-9745
Fax: 1 603 224-4256

Flexible Benefits

Mailing Address

PO Box 1320
Concord, New Hampshire 03302-1320
Fax: 1 603 224-0230

Flex Customer Service

Email: flexiblebenefits@csONE.com
Toll Free: 1 888 227-9745 ext. 2040

Department Hours:
Monday – Friday
8:00am – 4:30pm


COBRA Compliance Administration

Premium Payment Address

PO Box 1320
Concord, New Hampshire 03302-1320

Online Payment

COBRA Customer Service

Toll Free: 1 888 227-9745 ext. 2020
Fax: 1 603 224-4256
Email: cobra@csONE.com


Marketing & Support Services

Phone: 1 603 227-2010
Fax: 1 603 224-4256
Email: marketingadmin@csONE.com

Request a quote


I would absolutely recommend csONE as a TPA for any District or employer. Having gone through a full year of working with a TPA that was unable to do the job successfully, csONE has been a true breath of fresh air and relief to the District as well as all our employees.
Amadee D. - District Manager
I want you to let you know how much I appreciate the excellent service you provided.  On a day that you were scheduled to be out of work, you took my call to your cell phone regarding a distraught employee who realized she had been scammed and compromised her csONE debit card. You had the card cancelled within 5 minutes! Outstanding customer service once again. Many thanks!
Maura S. - Benefit Specialist
csONE is absolutely the best to work with! Great customer service. Kudos to your team.
Mardie W. - HR Manager
You provide us, and all our employee’s with such great service. Thank you so much!
Missy P. - Benefits Coordinator
I really appreciate help that csONE has provided us. I just shared at a staff meeting how helpful everyone has been, and how easy it has been to communicate with everyone! Thanks again!
Lisa C. - Manager
Our thanks to you and your crew for all the amazing work being done to get us up and running on short notice! It is very much appreciated.
Lisa C. - Manager
csONE service and competency is the best I have worked with. They are worth double the price paid to any other HRA provider. In my career, I have had to fire two other HRA providers mid-term for incompetency and csONE came to the rescue. With minimal stress they straightened out the past errors and made the process painless. I have one client who is offered free HRA services from an insurer and they insisted they stay with csONE.
Mike K. - Broker
Wow, time flies when you are having fun. Seriously, this has been a wonderful transition for us and really appreciate all you have done to to turn a difficult situation into a positive one.
Gibson S. - Manager
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