Learn about NPS contribution , a market-linked investment instrument for retirement income. Compare NPS Tier 1 and Tier 2 accounts, offline and online contribution methods, and tax benefits. Contributions to come from NRE and NRO A/c. For repatriation of amount, contributions should be made from NRE A/c only. Learn how to contribute to your NPS account online through the official website of NPST. Find answers to common FAQs about online contributions to Tier I and Tier II accounts. This guide will clarify the essential rules for NPS, including contribution amounts and frequency, what happens if you miss a payment, and how to simplify contributing in NPS.