Path A — Lower APR and same end date
Calculate remaining total outflow on the old loan versus the new loan including every transfer fee. This is the cleanest savings comparison.
Path B — Lower EMI only because tenure is longer
Do not call the EMI drop a saving. Compare total interest and fees through the new end date, then decide whether cash-flow relief is worth the extra duration.
Path C — Large upfront transfer costs
Calculate monthly saving and divide total switching cost by that saving. If you may repay or refinance before break-even, the transfer is weak.
Path D — Attractive rate but unclear terms
Pause. Get the KFS, APR, processing and third-party charges, prepayment terms and net disbursal before giving consent.