Co-terming (or co-termination) synchronizes the end dates of multiple subscriptions so they all renew at the same time. It simplifies procurement and negotiation for customers while creating predictable renewal events for vendors.

Example: A customer buys a CRM subscription in January and a billing platform add-on in April. The vendor co-terms the April subscription to align with the January renewal date, prorating the charge so both contracts end on the same date.