Fixed vs floating home loan interest rates: how to choose

A floating rate moves with a benchmark, so your EMI or your tenure can change during the loan; a fixed rate, in the RBI's definition, stays the same for the whole tenure. Floating suits borrowers who can absorb rises and want to prepay freely; fixed suits those who need a payment that will not change. The real difference is in the detail: what a floating rate is linked to, how often it resets, what the lender may change, and what it costs to prepay or switch. This guide sets out the rules as they stood on 5 October 2026.

How a floating rate is built

For a bank, a floating-rate home loan has two parts: an external benchmark and a spread on top.

• The benchmark. Banks must link floating-rate retail loans, including home loans, to an external benchmark: the RBI's policy repo rate, the three-month or six-month Treasury bill yield published by Financial Benchmarks India (FBIL), or another market rate published by FBIL. A bank must use one benchmark for a loan category, and the benchmark is part of your loan contract.
• The spread. The bank adds a spread for its costs and your credit risk. The credit risk part can change only if your credit assessment changes substantially, as agreed in the loan contract. Other parts, such as operating cost, can be changed once in three years, although a bank may reduce them sooner for a loan category to keep its customers.
• The reset. The rate must be reset at least once every three months; your agreement sets the reset dates.

Housing finance companies are not bound by the banks' external-benchmark rule and set floating rates under their own interest-rate policies. Ask an HFC what its floating rate follows and how often it can change.

How a repo rate change reaches your EMI

Suppose your bank's home loan rate is the repo rate plus a fixed spread. If the RBI cuts the repo rate by 0.25 percentage point, your rate falls by 0.25 point at your next reset date; if the repo rate rises, your rate rises by the same amount. Nothing changes between reset dates.

The change then goes either to your EMI or to the number of EMIs. On a long loan, a small rate change moves the tenure a long way. In our illustrative EMI calculations, a rise of half a percentage point five years into a 20-year loan of ₹50 lakh adds about ₹1,300 to the EMI, or about a year to the tenure.

What the RBI requires when a floating rate resets

These rules apply to banks and to housing finance companies for home loans repaid in equated instalments, whatever benchmark the loan follows.

• At sanction, the lender must explain how a change in the benchmark could change your EMI, your tenure or both.
• When your EMI or tenure goes up, it must tell you straight away.
• When rates rise for a whole class of borrowers, you can choose a higher EMI, a longer tenure or a combination, and you can prepay in part or in full at any time.
• A switch to a fixed rate at reset is offered at the lender's option, under its board-approved policy, which also says how many times you may switch. Any charge for switching must be disclosed in your sanction letter.
• A longer tenure must not lead to negative amortisation: your balance must not grow because the EMI no longer covers the interest.
• Every quarter, you must get a statement showing the principal and interest paid so far, the EMI, the number of EMIs left and the annualised rate or APR.

Older loans linked to MCLR or the base rate

Loans taken before banks moved to external benchmarks may still follow the bank's own marginal cost of funds based lending rate (MCLR) or base rate. They continue until repayment or renewal, and under MCLR the rate can be reset as rarely as once a year. If your floating-rate loan is one you could prepay without charges, which includes home loans to individuals, the bank must let you move to its external benchmark without any charges other than reasonable administrative or legal costs, and the move is not treated as closing the loan. If your own lender will not offer a better rate, balance transfer, prepayment and foreclosure explains moving to another lender.

Fixed, fixed-for-now and hybrid rates

In the RBI's definition, a fixed-rate loan is one whose rate is fixed for the entire tenure. Some offers described as fixed are fixed only for an initial period and then turn floating; the RBI calls these dual or special-rate loans. A hybrid loan has part of the amount on a fixed rate and part on a floating rate, and the floating part follows the floating-rate rules.

Before you choose a fixed or dual rate, ask what happens when the fixed period ends: which benchmark the loan moves to, and at what spread.

Prepayment: where fixed and floating differ

A lender cannot charge a prepayment fee it did not disclose, or revive at prepayment a fee it had waived earlier.

Choosing: a decision table

Neither choice is right for everyone. A floating rate passes on cuts as well as rises; a fixed rate buys certainty, so check what that certainty costs in the rate and in the prepayment terms. Compare both options on the APR in each Key Facts Statement, and read our guide to how home loans work for the rest of the process.

If the home will be let out, remember that rent can stop between tenants; an EMI that rises at the same time adds to the strain, so keep a cash reserve whichever rate you choose. Our page for owners explains how Nest Partners looks after a let home.

Questions to ask the lender

• Which benchmark is the floating rate linked to, and what is my spread?
• On which dates does my rate reset?
• In what circumstances can my spread change?
• Is the fixed rate fixed for the whole tenure? If not, what happens when the fixed period ends?
• When rates rise, will you change my EMI or my tenure, and how will you tell me?
• Do you offer switches between floating and fixed rates? How many, and at what cost?
• What prepayment charge applies to the fixed-rate option?
• For an existing MCLR-linked loan, what would my rate be on the external benchmark?
• What is the APR of each option in the Key Facts Statement?

Whichever rate you choose, look at your quarterly statement after every reset: it shows whether a change went to your EMI or to your tenure, and if the other option suits you better, ask for it.

Frequently asked questions

Will my EMI change on the day the RBI changes the repo rate?

No. A repo-linked rate changes on your loan's next reset date, which must come at least once every three months, and the lender then adjusts your EMI or your tenure.

Can I switch from floating to fixed later?

Only if your lender offers it. At a reset, a switch to a fixed rate is at the lender's option under its board-approved policy, and any switching charge must be in your sanction letter.