How Does the NPS Calculator Work?
The National Pension System (NPS) is a voluntary long-term retirement vehicle regulated by PFRDA. It invests contributions across Equity (E), Corporate Debt (C), and Government Bonds (G). Upon reaching age 60, up to 60% of the corpus can be withdrawn tax-free as a lump sum, while a minimum of 40% must be converted into a life annuity for regular monthly pension.
Formula & Mathematical Methodology
NPS wealth accumulation utilizes compounding annuity formulas over working career years:
Corpus = P × [((1 + r)n - 1) / r] × (1 + r)
Where P is monthly contribution, r is the monthly expected return, and n is total contribution months until age 60.
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Step-by-Step Practical Calculation Example
Investing ₹10,000/month starting at age 28 until retirement at 60 (32 years) at 10% expected return:
- Total Contribution: ₹38,40,000
- Total Retirement Corpus: ₹2,84,40,795
- 60% Tax-Free Lump Sum: ₹1,70,64,477
- Estimated Monthly Pension (at 6% annuity): ₹56,881 / month