India’s Floating Rate Savings Bonds, 2020 (Taxable), pay interest at the prevailing National Savings Certificate (NSC) rate plus 0.35 percentage points. The coupon resets every six months, and interest is ordinarily paid on January 1 and July 1. The rate can therefore change during the bond’s seven-year term; an old rate announcement is not a reliable guide to a later payment.
Which bond these rules apply to
This explanation concerns India’s Floating Rate Savings Bonds, 2020 (Taxable), commonly called FRSB 2020 (T). It is a specific Government of India bond, not a general description of every Indian bond with a floating rate. Its coupon formula and payment dates should not be assumed to apply to other securities.
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The Reserve Bank of India (RBI) describes FRSB 2020 (T) as an interest-bearing, non-tradeable bond repayable seven years from issue. It is held in a Bonds Ledger Account and is available through authorized receiving offices; the RBI also announced subscription through its Retail Direct portal. Those features matter when considering cash flow: this is not a traded security whose market price or sale proceeds determine its scheduled coupon.
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How the interest rate is calculated
The reference rate and spread
The annual coupon is the prevailing NSC rate plus 35 basis points. One basis point is 0.01 percentage points, so 35 basis points equals 0.35 percentage points. If the applicable NSC rate is 7.00%, for example, adding the spread gives an annual coupon of 7.35% for that reset period.
The RBI operational guidelines, updated June 27, 2022, state that the interest rate is linked to the prevailing NSC rate with a spread of 35 basis points. The coupon is reset every six months, beginning January 1, 2021. In practice, use the NSC rate applicable to the particular half-year and add 0.35 percentage points; do not treat the coupon at purchase as fixed for all seven years.
The benchmark is the NSC rate, not the bond’s previous coupon or a rate chosen by the investor. The spread remains 0.35 percentage points under the stated formula, while the NSC reference rate can change. That is why the resulting coupon may be different in one half-year from the next. A reset does not mean the bond pays the NSC rate alone: the 35-basis-point addition is part of the formula.
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For a straightforward estimate over an ordinary six-month period, multiply the principal by the annual coupon and divide by two:
Estimated half-year interest = principal × annual coupon rate ÷ 2
Use the coupon rate as a decimal in the calculation. For instance, at an annual coupon of 8.05%, the rate is 0.0805. On ₹100,000 held for an ordinary half-year at that rate, the estimate is ₹100,000 × 0.0805 ÷ 2 = ₹4,025 before any applicable tax deduction. This is an illustration of the annual rate divided across a six-month period, not a claim that a particular investor received that amount.
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The RBI’s dated example for July 1 through December 31, 2023 used an NSC rate of 7.70%. Adding 0.35 percentage points produced an annual coupon of 8.05% for that period. The resulting ₹4,025 estimate on ₹100,000 follows the illustrative arithmetic above. The 8.05% figure describes that 2023 period only; it should not be presented as the current coupon.
For a different principal, the same ordinary-period estimate scales proportionally: doubling the principal doubles the gross estimate, provided the annual coupon and period are unchanged. For example, at the same illustrative 8.05% annual coupon, ₹200,000 gives an estimated ₹8,050 for an ordinary six-month period before any tax deduction. This proportional calculation is only an aid to estimating; the applicable coupon, actual principal and interval still matter.
What changes at a reset
A reset changes the annual coupon used for the next period if the prevailing NSC rate has changed. It does not retroactively change the coupon for a completed period. To estimate an upcoming payment, identify the announced coupon for the period in question, then apply it to the principal over the applicable period. Looking only at the rate that applied when the bond was issued can produce the wrong estimate.
The rate for each half-year should be checked against the relevant official RBI announcement. No current-period rate is stated here: the documented 8.05% example is historical, and a current figure should be taken from the applicable RBI announcement rather than inferred from it. The RBI’s 2023 release gives a concrete illustration of the mechanism, not a forecast of future coupons.
When interest accrues and when it is paid
Accrual starts on subscription
Interest begins accruing from the bond’s subscription date. For the initial period, the RBI describes semiannual payment from the issue date up to June 30 or December 31, as applicable. The first interest interval may therefore be shorter than a full six months, depending on when the bond was subscribed.
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Regular payment dates
After the initial period, the recurring interest periods end on June 30 and December 31. The corresponding scheduled payment dates are July 1 and January 1. The RBI operational guidelines identify January 1 and July 1 as the effective payment dates each year.
If a scheduled payment date falls on a Sunday or another holiday, payment is made on the next working day. A payment arriving after the calendar date for this reason follows the stated holiday rule; it does not indicate that the coupon rate or the bond’s reset schedule has changed.
For a calendar check, first identify the period end, then the payment date immediately following it: a period ending June 30 is paid July 1, and one ending December 31 is paid January 1. If that scheduled date is a Sunday or holiday, use the next working day. The date shift affects when the payment is made, not the six-month reset formula.
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Broken periods and the final payment
FRSB 2020 (T) is non-cumulative: there is no option to add interest to the principal and defer all interest until maturity. Interest for a broken period, as well as interest for the final half-year, is paid along with principal. The final interest payment is thus associated with repayment rather than being reinvested automatically in the bond.
The simple principal × annual rate ÷ 2 illustration is intended for an ordinary six-month period. The RBI materials cited here establish the accrual start, payment schedule, and treatment of broken and final periods, but do not provide a worked individual-investor payout example or a special day-count convention for calculating an irregular interval. Do not apply the half-year estimate mechanically to a shorter initial or broken period as though it were a complete six months.
How to estimate a scheduled payment
- Identify the period. Determine which half-year the payment relates to. The recurring periods end June 30 and December 31; the initial interval can begin on the subscription date.
- Find the applicable coupon. Use the official rate announcement for that period. The coupon equals the applicable NSC rate plus 0.35 percentage points.
- Use the principal held. Apply the calculation to the relevant principal, not to an assumed future value that includes accumulated interest; the bond has no cumulative-interest option.
- Estimate an ordinary half-year amount. Multiply principal by the annual coupon expressed as a decimal, then divide by two. For irregular periods, use the scheme’s applicable calculation rather than assuming a full half-year.
- Account for payment timing and tax. The ordinary dates are January 1 and July 1, subject to the next-working-day rule for Sundays and holidays. The amount credited may be affected by tax deducted at source.
A practical check is to keep the period and rate together in your calculation notes. Record the period the coupon covers, the announced annual coupon for that period, and the principal used. This helps avoid carrying a prior half-year’s rate into a new estimate or mistaking the historic July–December 2023 example for a current rate. For a partial interval, note that the ordinary divide-by-two estimate does not establish the amount for that irregular period.
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Tax deduction and practical cash-flow implications
Unless the investor declares an applicable exemption in the application, tax is deducted at source when interest is paid. This means the cash received can be lower than the gross interest estimate. The calculation above is a pre-deduction estimate and does not determine an individual investor’s final tax liability.
Because interest is paid during the bond’s term rather than accumulated, investors should plan for the coupon as periodic income. The six-month reset also means the gross payment can vary from one period to another as the coupon changes. Someone budgeting from a past payment should not assume the same amount will recur.
Tax treatment depends on the investor’s circumstances and applicable rules. The RBI scheme terms cited here establish the withholding point and the application declaration qualification; they do not establish a personalized tax outcome. For an individual tax decision, consult the applicable tax rules or a qualified tax professional.
When planning cash flow, distinguish the gross coupon estimate from the amount that reaches the account after any withholding. Also distinguish the scheduled payment date from the date funds may arrive when a Sunday or holiday moves payment to the next working day. The interest itself is not automatically retained in the bond for compounding, so anyone wishing to reinvest a payment would need to make a separate decision outside the bond’s non-cumulative structure.
Common mistakes to avoid
- Using the 2023 example as today’s rate: 8.05% was the coupon for July 1–December 31, 2023 under the example’s NSC rate. It is not a timeless or current-rate statement.
- Confusing percentage points with percent growth: 35 basis points means adding 0.35 percentage points to the NSC rate, not multiplying that rate by 1.35%.
- Assuming the purchase-date rate lasts seven years: the coupon resets every six months, so each period’s applicable rate matters.
- Expecting interest to compound inside the bond: the scheme has no cumulative option; interest is paid rather than added to principal.
- Expecting a holiday-date credit on the scheduled date: when January 1 or July 1 is a Sunday or another holiday, payment moves to the next working day.
- Applying a full-half-year formula to a partial period: subscription-date accrual and broken-period treatment mean an initial or final interval may not be an ordinary six months.
- Confusing payment frequency with rate frequency: both operate on a half-year cycle here, but the rate for a payment must still be verified for its specific period; a payment date alone does not tell you the coupon.
- Treating the gross estimate as the credited amount: tax deducted at source can reduce the cash paid, unless an applicable exemption is declared in the application.
What to verify before relying on a payment estimate
- The exact instrument is FRSB 2020 (T), rather than another floating-rate bond.
- The official coupon announcement applies to the half-year being estimated.
- The principal amount and period are correct, especially for an initial or final interval.
- The expected date accounts for a Sunday or holiday, if one applies.
- The estimate is gross of any tax deducted at source unless the calculation explicitly accounts for withholding.
- The estimate does not assume that paid interest remains invested in the bond; the scheme has no cumulative-interest option.
The RBI operational guidelines updated June 27, 2022 set out the bond’s reset, accrual and payment mechanics. The RBI’s 2023 announcement illustrates the spread with an 8.05% coupon for July 1–December 31, 2023. Check a current RBI rate announcement for the period you are estimating rather than carrying that historical example forward.
Frequently Asked Questions
How is Floating Rate Savings Bond interest calculated?
For FRSB 2020 (T), the annual coupon is the prevailing NSC rate plus 0.35 percentage points (35 basis points). For an ordinary six-month period, a simple estimate is principal × annual coupon rate ÷ 2. The applicable coupon can change at each six-month reset.
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When is FRSB 2020 (T) interest paid?
After the initial interval, interest is ordinarily paid on January 1 and July 1, for periods ending December 31 and June 30 respectively. If a scheduled payment date falls on a Sunday or another holiday, payment is made on the next working day.
Is the 8.05% rate still the current rate?
Not necessarily. The RBI’s 8.05% example was for July 1–December 31, 2023, calculated from a 7.70% NSC rate plus 0.35 percentage points. Check the official RBI announcement for the half-year you are estimating.
Does interest start on the first payment date?
No. Interest accrues from the subscription date. The initial interval runs to June 30 or December 31, as applicable, so it may be shorter than a full six months. The ordinary half-year estimate should not be applied mechanically to a shorter interval.
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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchCan FRSB interest be compounded or paid only at maturity?
No cumulative option is available. Interest is paid periodically rather than added to principal; interest for a broken period or the final half-year is paid along with principal.
Is the interest payment I estimate the amount I will receive?
It is a gross estimate. Unless an applicable exemption is declared in the application, tax is deducted at source when interest is paid, so the credited amount may be lower. Individual tax outcomes depend on the investor’s circumstances.
The Bottom Line
FRSB 2020 (T) pays the prevailing NSC rate plus 0.35 percentage points, with the coupon reset every six months. Interest accrues from subscription and is ordinarily paid January 1 and July 1, subject to the next-working-day rule for holidays. Use the official coupon for the period being estimated, treat ordinary half-year arithmetic as an estimate, and remember that the bond is non-cumulative and withholding may reduce the cash received.
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