Find your NPS savings at retirement, and the part you must use to buy a pension plan (annuity).
Monthly contributions compound at your assumed return, the same way a SIP does.
At least 40% of the final corpus must currently be used to purchase an annuity.
Corpus: SIP-style compounding of monthly contributions
Min annuity: 40% of corpus
Is the NPS return guaranteed like PPF?
No. NPS returns depend on the market, so the rate you choose here is just a guess, not a promise. This is different from PPF, which has a fixed rate set by the government.