RBI Floating Rate Savings Bond (FRSB) Calculator โ FY 2025-26
Calculate your semi-annual interest income from FRSB 2020 (Taxable) at the current rate of 8.05% (NSC 7.70% + 0.35%). See tax impact on your FRSB interest, TDS under Section 193, and compare FRSB vs PPF vs SCSS vs NSC for the best post-tax returns. Updated for January-June 2026 rate.
Try another scenario
How to Use This Calculator
FRSB Returns tab
Enter your investment amount (minimum ₹1,000, no upper limit) and the current FRSB interest rate (8.05% for Jan–Jun 2026). The calculator shows your semi-annual interest payout (paid on 1 January and 1 July), annual income, total interest over 7 years, and maturity value. It also displays the rate reset schedule, premature exit rules for senior citizens, and TDS applicability.
Tax Impact tab
Enter your annual FRSB interest, other income (salary, pension, FD interest, rent), and select your tax regime. The calculator computes the marginal tax on your FRSB interest, post-tax effective return, and TDS reconciliation. Key insight: FRSB has NO Section 80C deduction — the full interest is taxable under both old and new regimes.
FRSB vs PPF vs SCSS vs NSC tab
Enter an investment amount and your tax slab to compare post-tax returns across four government-backed instruments. The comparison factors in investment caps (PPF ₹1.5L/yr, SCSS ₹30L), tax treatment (PPF is tax-free, SCSS and NSC offer 80C), and different tenures. This helps you decide where to park your savings for the best after-tax returns.
Share your result
Every input is encoded in the URL. Click Share to send your exact scenario to a family member, financial advisor, or save it for later.
The Formula
FRSB interest is calculated on a simple interest basis and paid semi-annually. The interest is NOT reinvested or compounded:
Semi-Annual Interest = (Investment × Annual Rate) / 2
Where:
Investment = Lump sum amount (min ₹1,000, no upper cap)
Annual Rate = NSC rate + 0.35% = 7.70% + 0.35% = 8.05% (Jan–Jun 2026)
Annual Interest:
Annual Interest = Investment × Annual Rate / 100
Total Interest (7 years, assuming constant rate):
Total Interest = Annual Interest × 7
Maturity Value:
Maturity Value = Investment + Total Interest
Rate Reset Formula:
FRSB Rate = Prevailing NSC Rate + 0.35%
Resets on: 1 January and 1 July each year
TDS (Section 193):
TDS at 10% if annual interest > ₹10,000
TDS at 20% if PAN not provided
Unlike NSC (which compounds) or PPF (which compounds and is tax-free), FRSB pays out interest semi-annually without reinvestment. The floating rate means your actual returns over 7 years will differ from projections if NSC rates change. Historically, NSC rates have been relatively stable (7.0%–8.0% range since 2016), so FRSB rates have varied between 7.35% and 8.35%.
Example
Priya — IT professional, ₹10,00,000 in FRSB for safety
Priya is 35, works in Bengaluru, and wants to park ₹10 lakh in a sovereign-backed instrument. She cannot use SCSS (under 60) and has already maxed out her PPF at ₹1.5 lakh/year. She chooses FRSB for the remaining amount. Her salary is ₹12,00,000/year and she is in the 30% tax slab (new regime).
Step 1: Calculate semi-annual interest
Step 2: Calculate tax impact
Step 3: Seven-year summary (constant rate assumed)
Priya receives ₹40,250 every 6 months (~₹6,708/month equivalent). At the 30% slab, her post-tax effective return is 5.64%. While lower than PPF's 7.1% tax-free return, FRSB allows her to invest the full ₹10 lakh as a lump sum without the ₹1.5 lakh/year PPF cap. Over 7 years, she earns ₹5.64 lakh in gross interest, with ₹3.94 lakh remaining after tax.