You may have many different reasons, e.g.:

• to use modern technologies your programmers have to be special trained, and that is expensive.

• optimized scalability

• lake of know how or qualified employees

• sometimes a programmer faces a barrier and need some help. We have such inhouse help available, because we employ many programmers, who can help easy each other

• we minimize the time consuming try and error period with the help of experienced programmer groups, who design the project first in details

• higher concentration on your own core competences

• better output and performance

• cost effective / cost reduction by lower total cost of ownership

• no own investments (software, hardware, new technology)

• easier clients, prolonged life cycle of actually installed clients

• mobility of the working place and data

• faster reaction to changes

• productivity gain for end user

• clear defined window of communication

• IT costs can be easy calculated

Programmers need a working place, computer, ... and a salary including salary side cost.