Detailed Analysis
The decision to take EMI or pay in full depends on the interest rate arbitrage between borrowing cost and investment returns.
EMI makes sense when: loan rate is low (0% EMI offers, home loan at 8-9%), you can invest the saved capital at higher returns, or you need to preserve liquidity for emergencies.
Full payment is better when: loan rate is high (credit card EMI at 15-18%, personal loan at 12%+), you don't have the discipline to invest the difference, or the purchase is a depreciating asset (car, gadgets).