The next step-up date is determined by adding the specified period, like 6 months or 1 year, to the date you set the step-up request. Here's how it works:
Example: If you have an existing SIP of ₹1000 and you set a step-up of ₹100 on 26th July 2024 with an annual frequency, your next step-up will occur on 26th July 2025. On this date, your SIP amount will increase by the step-up amount, making your new SIP ₹1100.
So, the next step-up date is simply the same date in the next year (or 6 months later) from when you set the step-up request.