Change in technology is guaranteed. At the same time, business processes continue to evolve.
This could result in the need to upkeep your solution. To keep pace, multiple releases are planned in Tally.ERP 9 over the next few years, which also include major new Tally.ERP 9 versions like
the Series B & Series C.
A TI will typically offer you these options for Support:
Annual Maintenance Contract (AMC)
AMC provides you with reliable, quick and guaranteed support, where the costs on any unforeseen risks are shared with the Service Partner. This would typically cost in the range of 30% per year (of the entire solution and license value).
Predictable cost Product upkeep across all Tally.ERP 9 versions and releases
Regular systems and data health check up
Telephonic and e-mail support
Remote Support and trouble-shooting
Contracted rate for onsite support and training
Need Based (Per Call) Support
In this case, you will have to reach out to the TI for any support or upkeep requirements, as the need arises. The risks and rewards become entirely yours, unlike in an AMC which is a shared-risk model.
Ideal if your support requirements are low. Costs could be in the range of Rs.3600 Rs.9000 per person day
You benefit if the support and redevelopments on existing solutions to make them compatible with the latest releases, are minimal.