3CX Perpetual Licences
Price includes maintenance for the first year, after which an annual maintenance renewal is required. Pricing is based on the number of simultaneous calls a company needs. Usually, 1 sim. call per 3-4 extensions is required, i.e. a company with 50 extensions would need a 16 sim. call licence.
The cost for annual maintenance is 27.5% of the perpetual license cost. View maintenance pricing here.
Note: Late maintenance renewal is not available, a 90 days grace period is given after which users can easily switch to an annual license.