The debit card in your wallet works abroad — so why buy a forex card at all? The short answer: rate lock and cross-currency fees. The long answer is a lot more interesting.
The rate-lock advantage
A forex card converts INR to USD (or EUR, GBP, etc.) at the moment you load it. The rate is locked. Your debit card, by contrast, converts every single swipe at the day's retail rate plus a 3.5% cross-currency markup charged by your Indian bank.
Where forex cards win
- Predictable spend — you know your exact INR cost day one
- Lower effective markup (0.7–1.5% vs 3.5–4%)
- ATM withdrawals in local currency without a conversion surprise
- Multi-currency wallets — load USD, EUR, GBP on the same card
Where debit cards still make sense
- Very short trips under 3 days where reload fees outweigh markup savings
- Emergencies where you need instant access to your full INR balance
- Countries where forex cards have limited acceptance (rare but happens)