How the rate changes the cost

Grace is conditional

Many cards avoid purchase interest only when the required prior balance is paid in full. Read the agreement and current statement status.

Balance categories coexist

Transfers, purchases and advances can accrue different rates while sharing one payment and credit limit.

$5,000 transfer plus $800 of new purchases

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Transfer APR: 0% promotional
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Purchase APR: 24%
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Purchase grace period may not apply
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One month on $800 is roughly $16
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Separate cards can make the cash flows easier to control

Illustrative calculation. Rounded values can differ from a lender or card issuer schedule.

This decision belongs in The Real Cost of Credit Cards. Use Credit Card Interest: Rebuild the Daily Balance Calculation to check the next assumption, then test the numbers in the Balance Transfer Calculator.

Grace-period assumptions usually do not carry over to cash withdrawals, so review cash-advance interest and fees separately.

Interpret the result in context

Allocation is not intuitive

Amounts above the minimum may be directed by legal or contract rules. Do not assume every dollar reaches the promotion you want to clear.

Residual interest can remain

Interest accruing between statement and payment can appear after an attempted payoff. Request a dated payoff amount when closing the balance.

Inputs that change the answer

A grace period can be lost when a statement balance is carried, causing new purchases to accrue interest sooner. Keep purchases separate from existing debt and verify how grace is restored.

Agreement terms to verify

  • Purchase grace-period language and payment deadline.
  • Current revolving balance by transaction category.
  • Number of paid-in-full cycles required to restore grace.
  • Identify each balance category and APR.
  • Confirm whether the purchase grace period is active.
  • Stop new purchases when the grace-period cost exceeds rewards.
  • Track promotion and statement due dates separately.
  • Check the next statement after payoff for residual interest.

Rebuild the calculation with your terms

Balance Transfer Calculator

Test whether the transfer fee buys enough interest savings before the promotion ends.

Where rate comparisons go wrong

  • Calling the entire account zero percent.
  • Valuing rewards without purchase interest.
  • Assuming the due date is the promotion end date.
  • Ignoring residual interest after payoff.

Questions this decision usually raises

Do all cards offer a grace period?

No. Terms vary by card and transaction type.

Can I restore the grace period?

Often after paying the required balance under the agreement, but timing can span billing cycles.

Do cash advances receive grace?

Commonly they accrue immediately, but the agreement controls.

Check the rules and definitions

This page explains a calculation, not a personal recommendation. Contract rules and consumer protections vary by product and jurisdiction. Check the current agreement and official guidance before acting.