1. The nine major Post Office schemes
India Post offers nine small savings schemes, each with its own rate, tenure, tax treatment and eligibility. They're all backed by the Government of India, so credit risk is effectively zero. Here's a quick comparison:
| Scheme | Rate (p.a.) | Tenure | Best for |
|---|---|---|---|
| Post Office TD (5 yr) | 7.5% | 5 years | Safe medium-term parking + 80C |
| NSC | 7.7% | 5 years | Guaranteed growth + 80C |
| KVP | 7.5% | 9 yr 7 mo | Money doubling with no limit |
| MIS | 7.4% | 5 years | Monthly income (up to ₹15L) |
| SCSS | 8.2% | 5 years | Retiree income (age 60+, up to ₹30L) |
| PPF | 7.1% | 15 years | Tax-free long-term wealth |
| SSY | 8.2% | 21 years | Girl child education/marriage |
| RD | 6.7% | 5 years | Disciplined monthly saving |
| Savings Account | 4.0% | None | Liquidity and emergency fund |
💡 Rates are notified quarterly by the Ministry of Finance. They move with G-Sec yields, so the figures above can change. Always check the current rate on the India Post website before booking.
2. Tax treatment: the real differentiator
What separates Post Office schemes more than rate is how they're taxed. In the 30% slab, tax treatment can make a 0.5% rate difference irrelevant.
| Scheme | 80C | Interest tax | Maturity |
|---|---|---|---|
| PPF | Yes | Tax-free | Tax-free |
| SSY | Yes | Tax-free | Tax-free |
| NSC | Yes | Taxable (reinvested = deemed) | Taxable |
| TD 5-year | Yes | Taxable | Taxable |
| SCSS | Yes | Taxable | Principal tax-free |
| MIS | No | Taxable | Principal tax-free |
| KVP | No | Taxable | Taxable |
| RD | No | Taxable | Taxable |
PPF and SSY enjoy EEE (Exempt-Exempt-Exempt) status — the contribution qualifies for 80C, the interest is tax-free, and the maturity amount is tax-free. No other Post Office scheme matches this.
⚠️ NSC interest is taxable every year even though you receive it only at maturity. It's deemed to be reinvested. This creates a "phantom income" tax problem — you pay tax on interest you haven't received. Plan your cash flow accordingly.
3. How each scheme calculates interest
Not all schemes use the same formula. Here's the mechanism for each:
- TD (Time Deposit): Quarterly compounding. Maturity = P × (1 + r/4)^(4t).
- NSC: Annual compounding. Maturity = P × (1 + r)^5.
- KVP: Annual compounding. Maturity = P × (1 + r)^(115/12).
- MIS: Simple interest paid monthly. Monthly payout = P × r/12.
- SCSS: Simple interest paid quarterly. Quarterly payout = P × r/4.
- PPF: Annual compounding. Each year's deposit compounds to maturity.
- SSY: Annual compounding. Deposits for 15 years, matures at 21.
- RD: Quarterly compounding with monthly deposits. Standard India Post formula.
4. PPF: the long-term tax-free champion
PPF is the best-known Post Office scheme. You deposit between ₹500 and ₹1.5 lakh per year for 15 years, and the entire corpus is tax-free at maturity. The 15-year lock-in is real, but partial withdrawals are allowed from year 7, and you can extend in 5-year blocks after maturity.
At 7.1% p.a., a ₹1.5 lakh annual deposit for 15 years grows to roughly ₹40.7 lakh — of which ₹22.5 lakh is your investment and ₹18.2 lakh is tax-free interest. In the 30% slab, that's equivalent to a taxable scheme earning about 8.7% — better than any bank FD.
✓ PPF is ideal for investors in the 20%–30% slab who want a completely tax-free, government-backed long-term product. It's the closest thing to a "set and forget" tax-free compounding instrument in India.
5. SSY: the highest-rate scheme, but conditional
Sukanya Samriddhi Yojana at 8.2% p.a. has the highest rate of any Post Office scheme. But it's only available for a girl child under age 10. The account matures 21 years from opening, with deposits required only for the first 15 years.
A ₹1.5 lakh annual deposit for 15 years (total ₹22.5 lakh) grows to roughly ₹67 lakh by year 21 — all tax-free. That's a return most other instruments can't touch.
Withdrawals are allowed for higher education after the girl turns 18 (up to 50% of the balance). Partial withdrawal is permitted, but the account must remain open.
6. Choosing the right scheme
A simple decision framework:
- Emergency fund: Post Office Savings Account (4.0%) or a liquid fund.
- Short-term goal (1–3 years): Post Office TD — quarterly compounding, no market risk.
- Medium-term goal (5 years, 80C): NSC or 5-year TD.
- Regular monthly income: MIS (under 60) or SCSS (60+, higher rate).
- Long-term tax-free wealth: PPF.
- Girl child's future: SSY.
- Money doubling: KVP (115 months).
- Monthly saving discipline: RD.
💡 Post Office schemes are one part of a portfolio, not the whole. For long-term goals, blending them with equity mutual funds or NPS gives higher returns. Use Post Office schemes for the safety and tax-free portions of your portfolio.
7. A worked example
Suppose you have ₹5,00,000 to invest and a 30% tax slab. Here's what each scheme would yield over its natural tenure:
- 5-year TD (7.5%): ₹7,24,974 — post-tax ₹6,57,482
- NSC (7.7%): ₹7,24,296 — post-tax ₹6,56,807
- SCSS (8.2%): ₹5,00,000 principal + ₹2,05,000 interest = ₹7,05,000 — post-tax ₹6,43,500
- MIS (7.4%): ₹5,00,000 + ₹1,85,000 = ₹6,85,000 — post-tax ₹6,29,500
But PPF would grow ₹5,00,000 to about ₹10,63,000 over 15 years tax-free — nearly double, because of the longer tenure and tax-free compounding.
8. Common mistakes to avoid
- Chasing the highest rate: SSY at 8.2% beats SCSS at 8.2% only if you have a girl child under 10. Eligibility matters as much as rate.
- Ignoring tax treatment: A 7.1% PPF beats a 7.5% TD in the 30% slab, because PPF interest is tax-free.
- Over-committing to PPF: The 15-year lock-in is real. Don't lock money you might need sooner.
- Forgetting the MIS/SCSS caps: ₹15 lakh for joint MIS, ₹30 lakh for SCSS. Plan around them.
- Not using 80C: NSC, TD-5yr, PPF, SSY and SCSS all qualify. Use them to fill your 80C limit before taxable options.
- Auto-renewing without review: Rates change quarterly. Review at maturity before renewing.
- Using Post Office schemes for retirement: Their real returns (post-tax, post-inflation) are often 1%–2%. Blend with equity for long-term goals.
9. Final thoughts
Post Office schemes are the safest government-backed savings instruments in India. They come with zero credit risk, predictable returns, and — for PPF and SSY — complete tax exemption. But their real returns are modest, so they work best as the "safe" layer of a diversified portfolio.
Use this calculator to compare schemes before you book. Match tenure to your goal, tax treatment to your slab, and eligibility to your situation. A 0.5% difference in rate rarely matters as much as getting the tax and tenure right.
