Commonwealth Automobile Reinsurers

Company Quick Start

Welcome to the Massachusetts Automobile Insurance Plan (MAIP).

Assigned Risk Company Systems

Companies should log-on for access to MAIP information.  MAIP is available Monday - Saturday, 7:00 a.m. - 7:00 p.m.

Once logged-on ARCs can access Assigned Applications, FTP Assignment Report, Quota Share, and ARP Directory.  Additional information about the secure area can be found in the MAIP Company Information (Help System).

Security Form
Log-on to the Security Administration area to designate the specific individuals that have access, and to which applications that access has been granted.

Data Transfer

CAR provides companies with two options for the receipt of MAIP Policy Application data.  Individual assignment data can be received each time an assignment is made through a posting to web services or a batch of daily assignments can be transferred through FTP every evening.   There are two verification standards for data transfer - ACORD XML or the CAR proprietary MAIP XML.   (a company must be an ACORD member in order to use the ACORD XML option).

For more information, companies should contact Wendy Browne at   Additionally, the Daily Assignment Transfer Request form should be completed so that CAR has the necessary information to start the process.

Reference Information

Information available to familiarize yourself with MAIP.

MAIP Company Information (Help System)
Instructions for ARCs on the MAIP Company area.

MAIP Policy Application Manual
Instructions for Producers to enter a MAIP Policy Application.

Company FAQs
Answers to questions frequently asked by companies

System Recommendations

Information presented on our website is formatted using HTML, Microsoft Excel, Portable Document Format (PDF) formats. If you do not own this software, you will need the appropriate viewers or plug-ins listed below to use the MAIP website.

Microsoft Office Products (Excel)
To obtain Microsoft viewers, please visit the Microsoft website and perform a search using the words "word" or "excel" and "viewer".

Adobe (PDF) Reader
If you are having trouble viewing the MA Application, Preinsurance or other forms you may need to install Adobe (PDF) Reader. Visit the Adobe website for Downloads.

Additional information of System Requirements is available on CAR's website in the Help section.