Best Low Interest Credit Cards 2026

The short version: Your APR ÷ 365 = your daily rate. Daily rate × your average daily balance = daily interest charge. These charges add up each day throughout your billing cycle — not just once a month.

How Daily Interest Is Calculated — A Worked Example

Let's say you have a $2,000 balance and your card's APR is 22%.

Step 1

Find your daily periodic rate

22% ÷ 365 = 0.0603% per day

Step 2

Calculate daily interest charge

0.0603% × $2,000 = $1.21 per day

Step 3

Multiply by days in billing cycle

$1.21 × 30 days = $36.30 in interest

This is added to your balance at end of cycle

So on a $2,000 balance at 22% APR, you're paying roughly $36 in interest every month — and that $36 is added to your balance, meaning next month you're paying interest on $2,036. This is compound interest working against you.

The Minimum Payment Trap — Why It Costs Thousands

Credit card minimum payments are typically set at about 2% of your balance or $25 — whichever is greater. At 22% APR, this barely covers the interest charge.

Monthly Payment	Months to Pay Off	Total Interest Paid	Total Cost
$40/month (minimum)	98 months	$2,620	$4,620
$80/month	31 months	$475	$2,475
$100/month	23 months	$332	$2,332
$200/month	11 months	$130	$2,130

Based on a $2,000 balance at 22% APR. Minimum payment recalculated each month.

Variable vs Fixed APR — What's the Difference?

Variable APR

Tied to the US prime rate (currently 7.5%). If the Federal Reserve raises interest rates, your card APR rises within weeks. Most credit cards use variable APRs. Your rate can change without notice beyond what's in your card agreement.

Fixed APR

Rare on consumer credit cards. Some credit union cards offer fixed APRs. Your rate stays the same regardless of Fed movements — more predictable for long-term planning. Can still be changed with 45 days' written notice.

What APR Does Not Include

Your purchase APR is just one cost. These are separate and can significantly change the true cost of carrying a balance:

Annual fee: Ranges from $0 to $550+ for premium cards. A $95 annual fee adds 9.5% to the effective cost of a $1,000 balance.
Late payment fees: Typically $25–$40 per missed payment. Some cards (like Citi Simplicity) have no late fees.
Cash advance APR: Almost always higher than purchase APR — often 25–30%. And there's no grace period: interest starts immediately.
Balance transfer fees: Typically 3–5% of the transferred amount. A $5,000 transfer at 3% costs $150 upfront.
Foreign transaction fees: Usually 1–3% on purchases made in foreign currencies. Avoidable by choosing a no-FTF card.

Now find a card with a lower APR

See our full comparison of the best low interest cards for 2026.

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Common Questions

How is credit card interest calculated?

Your APR is divided by 365 to get your daily rate. That rate is multiplied by your average daily balance to give the daily interest charge. These daily charges accumulate throughout your billing cycle.

What happens if I only pay the minimum payment?

Paying only the minimum on a $2,000 balance at 22% APR takes over 8 years to pay off and costs more than $2,600 in interest. Increasing your payment even slightly to $80–$100/month cuts the payoff time by more than half.

What is a variable APR?

A variable APR is tied to the US prime rate, which moves when the Federal Reserve adjusts the federal funds rate. Most credit cards use variable APRs. When the Fed raises rates, your card APR rises too — without needing your approval, as long as 45 days' written notice is given.

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How Credit Card Interest Works — APR Explained Simply