What is Floating Rate? Meaning, Definition & How It Works
Floating rate, also called floating interest rate or floating rate of interest, is a rate that is not locked in for the whole term of a loan or investment.
Instead, it is linked to a benchmark, a widely tracked reference number such as the Reserve Bank of India’s (RBI) repo rate (the rate at which RBI lends to commercial banks) or the National Savings Certificate (NSC) rate.
When the benchmark moves, the floating rate moves with it, usually after a set gap called the reset period.
Banks, non-banking financial companies (NBFCs), and the Government of India all use floating rates.
Since October 2019, RBI has required most retail loans, including home loans, to be linked to an external benchmark such as the repo rate, so their interest can reset when RBI’s policy rate changes.
On the investment side, instruments like RBI Floating Rate Savings Bonds link their coupon to the NSC rate.
The opposite of a floating rate is a fixed rate, which stays the same for the full term no matter what happens in the wider economy. Most Indian home loans today are floating, while most bank fixed deposits are fixed.
Did You Know?
The RBI Floating Rate Savings Bond, 2020 (Taxable) pays 8.05% per annum for the July to December 2026 half-year, a rate that is reset every six months and set at the NSC rate of 7.70% plus a fixed 0.35% spread.
How Does Floating Rate Work?
A floating rate is not decided once and left alone. It runs through a repeating cycle for as long as the loan or bond stays active.
- A lender or issuer picks a benchmark. Common Indian benchmarks include the RBI repo rate, the NSC rate, and the Treasury bill (T-bill) yield. Each one is published regularly and openly.
- A spread, also called a margin, is added on top. This is a fixed percentage that reflects the lender’s cost of funds, the borrower’s or issuer’s credit risk, and a profit margin. It usually stays the same once set.
- The benchmark plus the spread gives the floating rate. This is the rate you actually pay on a loan, or earn on a bond or deposit, during the current period.
- The rate resets on a fixed schedule. Home loans typically reset within three months of a repo rate change. RBI Floating Rate Savings Bonds reset every six months.
- Your EMI, coupon, or interest payout adjusts. On a loan, a rate increase can raise your EMI or extend your tenure. On a bond or deposit, a rate increase raises what you earn.
Because the benchmark is public, an alert borrower or investor can often see a rate reset coming before the lender sends a formal notice.
Pro Tip
Ask your lender for the exact name of the external benchmark and the reset date, in writing. Banks must disclose this under RBI’s external benchmark lending rate (EBLR) rules, but it is often buried inside the loan agreement.
Floating Rate Formula
Floating Rate Formula: Floating Rate = Benchmark Rate + Spread Where: • Benchmark Rate = the external reference rate the lender or issuer tracks, such as the RBI repo rate, the NSC rate, MCLR (marginal cost of funds-based lending rate), or a T-bill yield. • Spread = a fixed percentage, also called a margin, added by the lender or issuer over the benchmark. It reflects the borrower’s or issuer’s credit risk and the lender’s own cost of doing business. |
This formula gives you the interest rate itself. It does not calculate your EMI or your actual payout, since those depend on the principal amount, tenure, and payment frequency too.
Example with Real Numbers
Meena, a 52-year-old schoolteacher in Ahmedabad, invests ₹5,00,000 in RBI Floating Rate Savings Bonds, 2020 (Taxable) in July 2026. Given: • Investment amount: ₹5,00,000 • Coupon rate for Jul–Dec 2026: 8.05% per annum (NSC rate of 7.70% + spread of 0.35%) • Interest paid: semi-annually Calculation: Floating Rate = 7.70% + 0.35% = 8.05% Interest for the half-year = ₹5,00,000 × 8.05% × (6/12) = ₹20,125 |
This means Meena receives ₹20,125 in January 2027, the first of her semi-annual payouts. If the NSC rate changes before the next reset on January 1, 2027, her coupon for the January–June 2027 period changes too, since the bond’s rate floats with the benchmark instead of staying fixed at 8.05% for the full seven-year tenure.
Types of Floating Rate
Floating rate loans
The most common floating rate product for Indian households is the home loan. Since October 2019, RBI has required banks to link new retail loans, including home loans, personal loans, and loans to micro and small enterprises, to an external benchmark such as the repo rate.
When RBI changes the repo rate, banks must pass on the change to floating rate borrowers within three months, which can change your EMI or your loan tenure. See how a changing rate reworks a repayment schedule in our amortisation glossary page.
Floating rate bonds and notes (FRNs)
A floating rate bond, or floating rate note (FRN), is a debt instrument whose coupon resets periodically instead of staying fixed for the bond’s full life.
RBI Floating Rate Savings Bonds, 2020 (Taxable) are the best-known retail example in India, resetting every six months against the NSC rate.
Banks and corporates also issue floating rate bonds linked to benchmarks like T-bill yields, mainly to institutional investors. See how bonds are structured and valued generally in our bonds glossary page.
Floating rate deposits
Most Indian bank fixed deposits (FDs) offer a fixed rate for the full tenure. Floating rate deposits, where the rate resets periodically against a benchmark, are less common but do exist, mainly from select banks and within certain NRE/NRO term deposit products.
Before booking one, compare the total likely return against a regular fixed-rate FD from the same bank; a rate that floats can work for or against you depending on which way rates move.
Floating exchange rate
A floating exchange rate is a related but distinct idea, applied to currencies rather than loans or bonds. Under a floating exchange rate, a currency’s value against other currencies is set by market demand and supply rather than pegged by the central bank to a fixed level.
The Indian rupee has operated under a managed float since 1993, meaning its value moves with the market, but RBI intervenes occasionally to smooth out excessive volatility.
This is a different mechanism from a floating interest rate, though both share the idea of a rate that is not fixed in advance.
Key Components / What to Look For
- Benchmark: the published reference rate the floating rate is pegged to, such as the repo rate, the NSC rate, a T-bill yield, or MCLR. Always confirm exactly which one applies to your product.
- Spread or margin: the fixed percentage added over the benchmark. A lower spread means a cheaper loan or a richer bond payout, all else equal, and depends on your credit score or the issuer’s credit rating.
- Reset frequency: how often the rate updates, monthly, quarterly, or semi-annually. A shorter reset period means your payment reflects market changes faster, in both directions.
- Reset lag: the time gap between a benchmark change and when it actually shows up in your EMI or payout. RBI requires banks to reset EBLR-linked loans within three months of a repo rate change.
- Cap or floor: some floating products set a maximum or minimum rate. This is not universal, so check your loan or bond documents to see whether one applies and how far the rate can move.
Benefits of Floating Rate
- Rate cuts help you directly. When RBI cuts the repo rate, floating rate home loan borrowers usually see a lower EMI or a shorter remaining tenure within a few months, without needing to refinance.
- No prepayment penalty on floating home loans. RBI rules prohibit banks from charging foreclosure or prepayment penalties on floating rate retail loans, so you can pay off early without extra cost.
- Often cheaper than fixed at the start. Floating rates usually start lower than a comparable fixed rate, since the lender is not locking in long-term rate risk.
- Returns can rise with the market. On floating rate bonds or deposits, a rising-rate environment increases your income over time, unlike a fixed instrument locked in at the original rate.
Risks & Limitations
- Unpredictable payments. Your EMI or your investment income can change without much warning, which makes long-term budgeting harder than with a fixed rate.
- Rate hikes raise your cost. If the benchmark rises, so does your loan’s interest cost. A borrower comfortable at 8.5% may struggle if the rate resets to 9.5%.
- Falling rates hurt investments. A floating rate bond or deposit pays less if the benchmark falls, unlike a fixed-rate instrument that was locked in when rates were higher.
- Added complexity. Understanding which benchmark applies, how the spread was set, and when resets happen takes more effort than reading a single fixed number.
Important
Do not assume a floating rate loan will always stay cheaper than a fixed one. Compare the total interest over your likely holding period, not just today’s starting rate, before deciding.
Frequently Asked Questions
What does floating rate mean in simple terms?
Floating rate means an interest rate that changes during the life of a loan or investment, instead of staying the same throughout. It moves up or down along with a benchmark rate, such as the RBI repo rate, plus a fixed spread that the lender or issuer adds.
How is floating rate of interest calculated?
A floating rate of interest is calculated by adding a fixed spread to a benchmark rate. RBI Floating Rate Savings Bonds, for example, add a 0.35% spread to the NSC rate. For home loans, banks add their own spread to the repo rate or another approved external benchmark.
What is the difference between a floating rate and a fixed rate?
A fixed rate stays the same for the entire term of a loan or investment, giving you certainty about future payments or returns. A floating rate changes periodically because it tracks a benchmark. Floating rates can work in your favour if rates fall, or against you if rates rise.
What is a floating exchange rate?
A floating exchange rate is when a currency’s value against other currencies is set by market demand and supply rather than fixed by the central bank. The Indian rupee follows a managed float, where RBI occasionally intervenes to reduce sharp swings, but its day-to-day value is market-determined.
Are floating rate bonds in India a good investment?
Floating rate bonds, like RBI Floating Rate Savings Bonds, suit investors who want government-backed safety and are comfortable with a coupon that can change every six months. They tend to do relatively better when interest rates are rising, but may lag a comparable fixed-rate bond when rates are falling.
What is a floating rate deposit?
A floating rate deposit is a fixed deposit whose interest rate resets periodically against a benchmark, instead of staying fixed for the full tenure. These are less common in India than regular fixed-rate FDs, so check with your bank whether the specific product you are considering is fixed or floating before booking it.
Is my home loan floating or fixed?
Most new retail home loans taken in India after October 2019 are floating rate, linked to an external benchmark like the repo rate, because RBI made this mandatory for most banks. Check your loan agreement or ask your lender directly, since some older loans and select NBFC products may still be fixed or use an internal benchmark.
Should I choose a floating rate or a fixed rate for my next loan?
This depends on your comfort with payment uncertainty and where you expect rates to move. If you expect rates to fall or stay flat, floating can save you money. If you value predictable EMIs and are risk-averse, a fixed rate, even at a slightly higher starting cost, may suit you better. A financial adviser can help you weigh this against your full loan tenure and cash flow.