Most people who take a home loan think their EMI is fixed for the entire tenure. And in a way, it is. The amount you pay every month does not change. But the interest rate underneath that EMI can change. And when it does, something else quietly shifts instead.
Either your tenure gets longer. Or the bank writes to you saying your EMI is going up.
That is the floating rate of interest at work. This article explains exactly what it is, how it is calculated, why banks use it, and what you as a borrower should watch out for.
What floating rate actually means
When you take a home loan on a floating rate, your interest rate is not locked in for the life of the loan. It can move up or down based on the benchmark and spread specified in your loan agreement.
For many newer floating rate retail loans from banks, the benchmark is an external benchmark such as the RBI policy Repo Rate. RBI's external benchmark framework also permits specified Treasury Bill yields and other eligible market benchmarks. So the first thing to check is not simply whether your loan is called floating, but exactly which benchmark your lender has used.
Your actual home loan interest rate is generally the benchmark plus the spread or margin specified by the lender. The benchmark can change, while the treatment of the spread and any permitted changes to it depend on the loan agreement and applicable RBI rules.
Illustration: Benchmark is 6.50% + Bank spread is 2.50% = 9.00% interest rate
If the benchmark rises to 7.00% and the spread remains unchanged, the illustrative rate becomes 9.50%
The benchmark is the moving part of the rate. The spread is governed by your loan terms and applicable rules. If the benchmark changes, the lending rate can change at the next applicable reset. The RBI Monetary Policy Committee follows a bi-monthly policy cycle, but that does not mean your loan rate changes after every meeting.
What actually happens to your loan when the rate changes
This is where most borrowers get confused. Your EMI stays the same. So if the rate goes up, what changes?
The answer is: the split between principal and interest inside each EMI can change, and your lender may also revise the EMI, the tenure, or both.
Every EMI you pay has two parts: a portion that goes toward paying off the actual loan amount (principal), and a portion that goes toward interest. When your rate goes up, more of each EMI goes toward interest and less toward reducing the principal. The loan takes longer to close. Your tenure quietly grows by months or even years.
Say you borrow 50 lakhs for 20 years at 8.5%. Your EMI comes to roughly 43,391 rupees.
Now the RBI raises rates and your interest becomes 9.5%. The bank keeps your EMI the same at 43,391. But the original 20-year loan now takes around 23 to 24 years to close because less of each payment is going toward the principal.
You did not feel it month to month. But you will pay 3 to 4 extra years of EMIs before the loan is done.
Lenders can handle a rate reset by changing the EMI, extending the tenure, or using a combination of both, depending on the loan terms and applicable requirements. RBI instructions for EMI based floating rate loans also require borrowers to be informed about the impact of rate changes and provide specified choices at reset. Check your lender communication and loan agreement to understand what applies to you.
How is this different from a fixed rate loan
A fixed rate home loan locks in your interest rate at the time of taking the loan. It does not matter what the RBI does after that. Your rate stays the same for the agreed period, sometimes for the full tenure, sometimes only for the first 2 to 5 years before it converts to floating.
Fixed sounds safer. And it can be. But there is a catch: banks charge a higher rate upfront on fixed loans to protect themselves from the risk of rates falling in the future. So you pay for that certainty.
| Fixed Rate | Floating Rate |
|---|---|
| Rate stays the same throughout | Rate moves with the RBI repo rate |
| Usually higher at the time of taking the loan | Usually lower to start with |
| No benefit if rates fall in the market | You benefit when RBI cuts rates |
| Provides more payment certainty during the fixed period | Payment or tenure can change when the floating rate resets |
| Easier to plan monthly budget | Tenure or EMI can change over time |
The practical difference is not simply "safe versus risky." A fixed rate gives more payment certainty for the period covered by the fixed rate, while a floating rate passes benchmark changes through to the borrower according to the loan terms. Compare the rate, reset rules, spread, switching charges and prepayment terms rather than looking only at the starting EMI.
The MCLR era vs the repo-linked era
Before October 2019, banks used a different benchmark called MCLR, which stands for Marginal Cost of Funds based Lending Rate. The problem with MCLR was that banks were slow to pass on rate cuts from the RBI to customers. The RBI would reduce the repo rate and months would pass before borrowers saw any benefit.
From October 2019 onwards, RBI required new floating rate personal and retail loans from scheduled commercial banks, including housing loans, to be linked to an eligible external benchmark. The policy repo rate is one permitted benchmark, but it is not the only one. For external benchmark linked loans, the interest rate must be reset at least once in three months.
If you took a loan before the external benchmark framework and it is still linked to MCLR or another older benchmark, check the benchmark, spread, current rate and any switch-over terms. Existing borrowers may have options to move to an external benchmark under applicable rules and lender terms, so compare the cost and resulting rate before switching.
When floating rates work in your favour
The best period for a floating rate borrower is when the RBI is in a rate-cutting cycle. This happens when inflation is under control and the economy needs a push. The RBI lowers the repo rate, banks lower their lending rates, and your home loan interest drops too.
Between 2019 and 2020, the RBI reduced the policy repo rate from 6.50% to 4.00%. Borrowers on eligible floating rate loans could see lower lending rates as benchmark changes were transmitted through the applicable reset mechanism. The exact effect on EMI and tenure depended on the lender and loan terms.
When rates go up, the opposite happens. During the 2022 to 2023 tightening cycle, the RBI raised the policy repo rate substantially. Floating rate borrowers with benchmark-linked loans could therefore see higher lending rates at subsequent resets. Depending on the lender method, the effect could appear as a higher EMI, a longer tenure, or both.
What to watch for as a floating rate borrower
The part payment connection
If you want to see the effect of a lower or higher rate on your monthly payment, you can use the EMI Calculator. For borrowers considering an existing-loan switch, the Balance Transfer Calculator can compare the current loan with a new rate after accounting for relevant transfer costs.
Part payment and floating rates go together more than most people realise.
When rates are high, a larger portion of your EMI goes toward interest and a smaller portion reduces your principal. The outstanding balance stays high for longer. This is exactly when a lump sum part payment does the most damage to the loan. You are directly cutting into the principal when it is being stubborn, and immediately reducing the interest calculated on the remaining balance.
When rates fall, your effective interest cost drops anyway. But if you also make part payments during that period, you end the loan even faster. The two effects compound.
A home loan is the largest financial commitment most people ever make. Understanding the mechanics does not take long but it can change how you manage it. And over a 20-year loan, small decisions made at the right time can save you more money than almost anything else you do financially.
Frequently Asked Questions
A floating rate home loan has an interest rate that can change during the loan based on the benchmark and spread specified in the loan agreement. For many newer bank retail loans, the benchmark is an external benchmark such as the RBI policy repo rate. A rate change can affect the EMI, the tenure, or both.
When the interest rate increases, the lender may increase the EMI, extend the tenure, or use a combination of both, subject to the loan terms and applicable regulatory requirements. Check the reset communication from your lender to see what changed.
There is no universal answer because the outcome depends on the starting rates, future rate movements, loan tenure, reset terms and any switching costs. A floating rate can fall when its benchmark falls, while a fixed rate provides greater payment certainty for the fixed period. Compare the actual terms offered to you.
The RBI Monetary Policy Committee follows a bi-monthly policy cycle, but your loan rate does not necessarily change after every meeting. For bank loans linked to an external benchmark, RBI requires the interest rate to be reset at least once in three months. The actual timing depends on the benchmark and reset clause in your loan agreement.
For EMI based floating rate personal loans covered by RBI instructions, lenders must provide an option to switch to a fixed rate at reset, subject to the lender policy and disclosed charges. The exact option, frequency and cost depend on the lender and loan agreement. Check the charges before making a switch.
No. For new floating rate retail loans covered by the external benchmark framework, banks can use specified external benchmarks including the RBI policy repo rate and certain Treasury Bill yields. Check your sanction letter or loan agreement to identify the benchmark used for your loan.