The benchmark name alone does not decide which loan is cheaper. What matters is the effective rate formula and how quickly it resets. Record benchmark, spread, reset date, spread-change conditions and any conversion fee.
Compare the mechanics
| Question | Loan A | Loan B |
|---|---|---|
| Benchmark | Exact published reference | Exact published reference |
| Spread | Fixed / review conditions | Fixed / review conditions |
| Reset frequency | Monthly / quarterly / other | Monthly / quarterly / other |
| Pass-through lag | When change reaches your loan | When change reaches your loan |
| Payment response | EMI, tenure or both | EMI, tenure or both |
| Switching cost | Conversion or documentation | Conversion or documentation |
Stress-test both reset systems
Capture today’s effective rate. Write benchmark plus spread exactly as shown in the sanction or latest rate communication.
Map the reset calendar. Note when the benchmark is observed and when your loan actually changes.
Apply an equal upward rate shock. Recalculate EMI or tenure under both structures using the lender’s method.
Apply an equal downward shock. Check how quickly each loan transmits the reduction and whether any request is needed.
Add conversion cost. A switch is worthwhile only if expected savings exceed fees and the remaining loan life is long enough to recover them.
Decision rule: prefer the structure whose benchmark and reset behaviour you can understand and whose downside remains affordable—not simply the one with the lower rate on the comparison date.
The benchmark name matters less than the complete reset formula
A home-loan rate is not just “repo” or “MCLR”. Write the actual formula: benchmark + contractual spread, then record how often the benchmark resets for your loan, whether the spread can change, and how the lender adjusts EMI versus tenure.
The RBI’s updated floating-rate EMI reset FAQ applies to equated-instalment personal loans linked to both external and internal benchmarks, including MCLR. It requires communication of the impact of benchmark changes and describes borrower options such as EMI increase, tenure extension or a combination, fixed-rate switching where the lender offers it, and part/full prepayment.
| Feature | Repo/external benchmark loan | MCLR/internal benchmark loan |
|---|---|---|
| Benchmark movement | Tracks an external reference subject to contractual reset | Tracks lender’s internal benchmark |
| Your actual rate | Benchmark + spread | MCLR + spread |
| Reset timing | Check sanction/loan agreement | Check reset date/frequency for your account |
| Rate shock response | Compare EMI increase, tenure extension, combination, switching or prepayment options | |
Compare on the same balance and remaining term
Suppose two offers both quote 8.5% today, but one resets quickly and the other later. A snapshot does not tell you which is cheaper over five years. Model at least three cases: benchmark unchanged, benchmark +1 percentage point, benchmark −1 percentage point. For each, calculate EMI/tenure effect under the lender’s actual reset rules.
Watch the “same EMI, longer tenure” effect
When rates rise, keeping EMI unchanged can push repayment far into the future. Ask for the revised number of EMIs and total interest, not only reassurance that “your EMI stays the same”. The RBI FAQ also says quarterly statements should disclose principal and interest recovered, EMI, EMIs left and the annualised rate—use that data to monitor drift.
Do not refinance for a small headline gap without break-even math
For a transfer, calculate total switching cost and divide it by realistic monthly interest savings. Keep the same remaining end date in both scenarios. A lower EMI achieved only by restarting a long tenure is not necessarily a saving.
Decision rule: choose and monitor the loan based on benchmark + spread + reset frequency + borrower options. “Repo-linked is always better” and “MCLR is always stable” are both oversimplifications.
Track the spread separately from the benchmark
Your loan rate is usually benchmark plus spread. Borrowers often watch RBI policy headlines but ignore the contractual spread. Record both. If the benchmark falls but the spread is high, your total rate may still be uncompetitive.
Use a reset log
Keep a simple table with reset date, benchmark, spread, final rate, EMI, remaining tenure and outstanding principal. Update it whenever the lender sends a reset notice. Over several years, this creates a clear audit trail.
Know which variable the lender changes
When rates rise, some lenders extend tenure before increasing EMI. Others may offer a choice. The cost difference can be large. Ask for the amortisation schedule under each option.
For example, keeping EMI unchanged may feel comfortable but can add dozens of instalments. A modest EMI increase might prevent years of extra interest. Choose based on household cash flow, not default settings.
When switching benchmarks
Compare the new spread and conversion fee. Ask whether the spread is fixed for the remaining loan or can be revised under specific conditions. Use the same outstanding principal and end date to model savings.
The best benchmark is the one you understand and monitor. A borrower who reviews every reset can react early; a borrower who watches only EMI may discover tenure creep years later.
Compare the loan after a full interest-rate cycle, not one quarter
Repo-linked loans can transmit policy changes faster, which is helpful when rates fall and painful when they rise. MCLR-linked loans may move with a different lag. Neither behaviour is automatically superior; the borrower needs enough cash-flow resilience for the reset pattern.
If you are considering switching, obtain historical reset notices from your current loan and compare how quickly past benchmark changes reached your rate. Then ask the new lender for its reset frequency and spread. This gives you evidence rather than relying on a salesperson’s claim that one benchmark is always cheaper.
Keep an eye on the remaining loan term after every reset. If the lender extends tenure, decide whether to accept it, increase EMI or make a part-payment. Small interventions early in the loan can prevent a large amount of extra interest later.
Official references
- RBI floating-rate reset FAQ
- RBI complaint portal
- RBI Key Facts Statement rules — APR, charge and repayment disclosures for covered retail term loans.