Next step-up date is calculated by adding 6 months / 1year to the date on which you placed the step-up request. For example, if you have a current SIP of Rs.1000 and add a step-up of Rs.100 on 26-Jul-2022 with the frequency of 1 year, your SIP amount will be stepped-up on 26-Jul-2023, your new SIP amount will be Rs.1100