IT benefits of SOA are:

The ability to build composite applications is provided.

Business services are offered across the platforms.

A self-healing infrastructure that reduces management costs is created.

Location independence is provided

Provides truly real-time decision-making applications.

Reliability is enhanced

It is not necessary that Services be at a particular system or network

The approach is completely loosely coupled

Hardware acquisition costs are reduced

At every level there’s Authentication and authorization support

Existing development skills are leveraged

Provides a data bridge between incompatible technologies

The search and connectivity to other services is dynamic