Definition
Paying for a year up front in exchange for a lower monthly rate than month-to-month billing.
Annual billing explained
Most published CRM prices assume annual billing. The discount is real, but you are committed for the term even if the CRM doesn't work out, so try the product on a monthly plan or trial first when you can.
Some vendors, such as Salesforce, require annual contracts on most plans.
Where Annual billing comes up
CRMs mentioned