MasterFormat Registration

Access to the online version of is provided as a service to CSI and CSC members. Purchasers of MasterFormat who are not CSI or CSC members receive access for two years as part of their purchase.

If you already have an account at then no registration is required. Please proceed to the login page and use your credentials for access.

You may create an account by visiting the account page of CSI's national website. Once registered, you may:

If you have any questions, please contact CSI at or 800-689-2900.