Credit Cards
Credit Card
Borrow-now, pay-later line for purchases with an interest-free window.
A credit card lets you spend up to a limit and repay within ~45–50 days interest-free. Pay in full and it is free short-term credit plus rewards; revolve the balance and interest (~3.5%/month, ~42%/year) wipes out every reward many times over.
Example
₹20,000 spent and repaid in full: zero interest plus ~₹200–400 in rewards. Same ₹20,000 revolved for a year: ~₹8,000+ in interest.