Generally/ordinarily, an increase/rise in pay is approved once on completion of one year of satisfactory service rendered by an employee, including those on 'probation'. If the 'probation' is for a shorter than 1 year period the confirmation is implemented without a rise in pay. In this case the incumbent might wait until completion of one year service for a formal increase/rise/increment which is known as 'periodical increment' in India. On the other hand this formality is dictated by co's HR policy rather than practice followed by others. The general practice explained above is not totally sacrosanct. In case of very good/excellent performance resulted by an assessment appropriate rise could be granted even if the probation period is less than one year's duration. This is again a policy matter of the firm and driven by discretion rather than a rule of law. Sometimes those turning out extra-ordinary performance showing appreciable promises, considered as an asset can even be placed in higher position with due increase in pay/time scales with other incentives.
14th February 2019 From India, Bangalore