The Chicago Manual of Style is available online for an annual fee. Online subscribers have access to the full contents of the 16th and 17th editions. CMOS offers online subscriptions to individuals for $39.00/year, but PEN members are eligible for the group discount. All PEN subscriptions are based on the calendar year and expire in December.

One-Year Subscription


(expires December of this year)

Half-Year Subscription


(July of after, expires December of this year)

Once your subscription is processed, you will receive an email from CMOS Online with instructions to activate your subscription. Be sure to check your spam folder if you have not received it. If you don’t respond to that email, your account will not be activated.


Email notices will be sent in November. Payment must be received by December 15 to maintain subscription access. Payments received after December 15 may not be processed until January.