Truecaller Verified Business Caller ID Subscription is calculated from the day a user activates the plan on a pro-rata basis.
Example 1: If a user subscribes to the 1-10 number tier plan, which costs $50 per number listing. The costing will be $250[$50 X 5 numbers] for 5 numbers if the plan gets activated on the first of the month.
Example 2: In case the plan is activated on the 29th of November, the pricing will be $16.6 [$250/30 days= $8.3 X 2 days -> $16.6]