Visit the official website of your NPS service provider and log in.
Look for the 'Contribution' or 'Investment' section in the menu and click on it.
Choose the 'Systematic Investment Plan' option and decide the frequency (monthly, quarterly, or half-yearly) and the investment amount.
Select the scheme(s) you wish to invest in. You can opt for a single scheme or multiple schemes with different asset allocations.
Review your selections and confirm the details.
Enter your bank account information, date of the first instalment, and complete the KYC (Know Your Customer) process if not done already.
Make the first instalment payment through net banking, debit card, or other available payment options.