When applying for a credit card, lenders consider your credit score first and foremost. If you’d like to qualify for a credit card with the best interest rate, it’s important to have a good credit score. In most cases you’ll want to aim for a credit score above 700 to qualify for credit cards with the best interest rates.
If your credit score isn’t so great, you may still be approved for the credit card, but the interest rate may be higher. This is the lender’s way of protecting themselves since you pose a higher risk of not paying off your credit card balance compared to someone with an impeccable credit score.
In some cases, having a high income may also give you access to credit cards with lower interest rates.