FD vs Debt Mutual Fund vs RBI Floating Rate Bonds — Where to Park Conservative Money
Last verified: April 2026, against current RBI Floating Rate Savings Bond rate (8.05%, May 2026 reset), debt mutual fund post-Budget-2024 taxation, and major bank FD card rates.
Bank FDs feel safe and obvious. Debt mutual funds promised better returns and tax efficiency — until April 2023 killed their LTCG advantage. RBI Floating Rate Savings Bonds are the dark horse: 8.05% sovereign, but with a 7-year lock-in and slab-rate taxation. After Budget 2024 reshaped the entire fixed-income landscape, what’s actually the right home for a conservative investor’s ₹10-50 lakh? This guide does the head-to-head.
The headline comparison
| Feature | Bank FD (5-year) | Debt Mutual Fund | RBI Floating Rate Savings Bond |
|---|---|---|---|
| Current rate | 6.5-7.5% (banks) / 7.5-8.0% (small finance banks) | ~7.0-8.0% YTM (varies by category) | 8.05% (resets every 6 months) |
| Risk | Bank credit (DICGC ₹5L cover) | Credit + duration | Sovereign (zero credit risk) |
| Lock-in | 5 years (premature withdrawal allowed at penalty) | None (open-ended) | 7 years (premature only for senior citizens) |
| Tax on interest/gain | Slab rate, TDS at 10% if interest > ₹40K (₹50K seniors)/year per bank | Slab rate (post Apr-2023 units, no LTCG concept) | Slab rate, TDS at 10% if interest > ₹10K/year |
| Liquidity | 1-3 days (premature withdrawal penalty 0.5-1%) | 1-2 working days (T+1/T+2) | Locked, illiquid |
| Minimum / maximum | ₹1,000 / no max | ₹500-5,000 / no max | ₹1,000 / ₹2 Cr per applicant |
Bank FD — the default but rarely optimal
Senior citizens get 0.5-0.75% rate bonus. ICICI, HDFC, SBI 5-year FD rates currently sit at 6.5-7.0%. Small finance banks (AU, Equitas, Suryoday, Ujjivan) offer 7.5-8.5% — but DICGC insurance only covers ₹5 L per bank per depositor. So splitting ₹40 L across 8 small finance banks gives full insurance, but the operational headache is real.
Tax: slab rate. For 30%-slab investor: 7.0% × 0.7 = 4.9% post-tax. Below SCSS, below RBI floating rate bonds, often below inflation.
Senior citizens benefit from the 80TTB ₹50,000 exemption (old regime only) — first ₹50K of interest from FDs / savings accounts is tax-free. That makes FD economics slightly better for seniors but doesn’t change the broader pattern.
FD is right for: Money you’ll need in 6-24 months (where lock-in matters), rolling emergency fund, and senior citizens combining 80TTB with bank-FD comfort.
Debt mutual funds — the asset class Budget 2023 killed
Until 31 March 2023, debt mutual funds enjoyed LTCG with indexation after 36 months — effectively delivering FD-equivalent returns at 5-7% effective tax instead of 30%. That advantage is gone. Units bought from 1 April 2023 onwards: all gains taxed at slab rate, regardless of holding period.
Pre-April-2023 units retain old rules but at the new lower 12.5% rate (no indexation) — see our capital gains tax guide.
So why would anyone use debt mutual funds today?
- Liquidity. T+1 redemption, no premature withdrawal penalty.
- Credit-spread access. A good corporate bond fund or banking & PSU fund can deliver 7.5-8.5% YTM — comparable to FDs but more diversified.
- Duration play. Long-duration gilts can outperform when interest rates fall (capital gain on bond price). The opposite is also true — long-duration gilts lost 5-8% in 2022 when rates rose.
- Liquid funds for parking. Better than savings accounts for short-term parking (3-12 months). 6.5-7% YTM, daily liquidity.
Debt MF is right for: Short-term parking (liquid/ultra-short funds for 3-12 month horizons), professional credit-spread management, and long-duration tactical bets when rates are about to fall.
RBI Floating Rate Savings Bond — the underrated winner
Government of India RBI Floating Rate Savings Bond (FRSB) — successor to the old 7.75% taxable savings bond. Resets every 6 months at 35 basis points above the prevailing NSC rate. As of May 2026, NSC pays 7.7% so FRSB pays 8.05%. Half-yearly interest payouts (cumulative not allowed; you must take the interest).
Tax: Interest is fully taxable at slab rate. TDS at 10% if interest exceeds ₹10,000/year. No 80C deduction.
Lock-in: 7 years. Senior citizens get progressively earlier exit options:
- 60-70 years: lock-in 6 years
- 70-80 years: lock-in 5 years
- 80+ years: lock-in 4 years
How it stacks up against FD: 8.05% sovereign vs 7% bank credit. For a 30%-slab investor, post-tax 5.6% vs 4.9% — FRSB ~70 bps ahead. For lower slabs, the gap widens.
The catch: 7-year lock-in is real. You can’t take loan against it. You can’t pledge it. Premature exit only for seniors. So FRSB is a buy-and-hold instrument for the long-tail safe portion of a portfolio.
FRSB is right for: Conservative investors with ₹5L+ to lock for 7 years, wanting sovereign safety + better-than-FD rate, who don’t need liquidity from this bucket.
Worked example — ₹10 L conservative bucket
40-year-old in 30% slab, building a 10-year debt-side bucket. Annual reinvestment of interest assumed.
| Allocation | Pre-tax 10-year corpus | Post-tax 10-year corpus |
|---|---|---|
| ₹10 L → Bank FD @ 7% | ~₹19.7 L | ~₹15.4 L (slab) |
| ₹10 L → Banking & PSU debt MF @ 7.5% YTM | ~₹20.6 L | ~₹16.0 L (slab) |
| ₹10 L → RBI FRSB @ 8.05% blended | ~₹21.7 L | ~₹16.6 L (slab) |
| Mixed: ₹5 L FRSB + ₹5 L liquid fund | ~₹20.5 L | ~₹16.0 L |
Differences are modest (~5% over 10 years) but cumulative. The mixed allocation gives liquidity-on-demand from the liquid fund + better long-tail return from FRSB.
What about Senior Citizen Savings Scheme (SCSS) and POMIS?
If you’re 60+, SCSS pays 8.2% — same as SSY. Maximum ₹30 L per individual. Quarterly interest payouts. 80TTB exemption applies. This is the single best instrument for retirees with ₹30 L+ to allocate. We didn’t include in the main table because it’s senior-only.
POMIS (Post Office Monthly Income Scheme): 7.4%, ₹9 L individual cap, 5-year tenure, monthly payout. Lower rate than FRSB but joint accounts and post-office accessibility appeal to seniors.
The conservative-investor allocation framework
For someone with ₹50 L conservative bucket and 10-year horizon:
- 10% liquid fund — ₹5 L, emergency-fund extension
- 30% RBI FRSB — ₹15 L, sovereign anchor
- 30% bank FDs across 2-3 banks — ₹15 L, FD ladders 1/3/5 year
- 20% medium-duration corporate bond fund — ₹10 L, professional credit-spread management
- 10% short-term equity savings fund or hybrid — ₹5 L, light equity kicker for inflation hedge
If you’re 60+, replace the liquid + corporate bond fund with SCSS (₹30 L cap) — sovereign, similar rate, and 80TTB-friendly.
Linked deep-dives
- Capital gains tax — what changed for debt MFs
- SIP guide — adding equity to a conservative portfolio
- PPF vs EPF vs VPF — sovereign rates compared
- Capital Gains Calculator
FAQs
Are RBI Floating Rate Bonds safer than bank FDs?
Yes — they’re direct Government of India obligations, no credit risk, no DICGC limit. Bank FDs carry bank credit risk; DICGC insures only ₹5 L per bank per depositor.
Can I get loan against FRSB?
No. RBI FRSBs cannot be pledged, transferred, or used as collateral. This is a key structural difference vs bank FDs (which can be pledged).
What’s the difference between debt MF and bank FD post Budget 2024?
Tax-wise, identical — both at slab rate. Differences are now: liquidity (debt MF wins), professional credit management (debt MF, marginally), simplicity (FD), and credit safety (FD with PSU bank or DICGC limit).
Is the 80TTA / 80TTB deduction useful?
80TTA: ₹10,000 deduction on savings account interest (old regime only). 80TTB: ₹50,000 for seniors on FD/savings/POMIS interest (old regime only). Marginal but worth claiming. Not applicable in new regime.
Should I lock in FD rates if RBI is cutting?
If you’re confident rates will fall in the next 6-12 months, locking a 5-year FD at current rates is a defensive move. The alternative is duration play via gilt funds — which can deliver capital gains if rates fall, but lose if rates stay flat or rise.
Can NRIs buy RBI Floating Rate Bonds?
No — RBI FRSB is for resident Indians only. NRIs have NRE/NRO FDs (with full repatriability and tax-free interest on NRE) and tax-free PSU bonds in the secondary market.
Sources & references
- RBI — Floating Rate Savings Bond notification
- Department of Posts — small savings rates
- Finance Act 2023 (debt MF taxation change)
- Major bank FD rate cards as of April 2026
Last verified: April 2026. RBI FRSB rate resets every 6 months; bank FD card rates change frequently. We re-verify quarterly.
