Altaro VM Backup is a one-time purchase which includes 1 year of SMA (Software Maintenance Agreement), which entitles you to receiving premium Support and Upgrades.

From year 2 onwards, you will have the option to renew at a cost of 25% of the original license price, per extra year of SMA. You can choose not to renew the SMA and in that case the product will still continue working but you will not be eligible for technical support and major/minor upgrades.