The eligibility criteria differ not only from one issuer to another but also for different type of credit cards in India offered by the same issuers. While the basic requirements like age, city of residence, regular source of income, credit score, etc. are likely to remain the same across card variants, the major differentiator is the minimum income requirement. Depending on the type of card, its benefits, and its annual fee, card providers have set the income eligibility criteria for each card they offer.