A spare dollar can clear card debt or earn interest in savings — not both. See which one leaves you ahead, with the trade-off named on both sides.
Rates and APRs are yours to enter — use your real numbers. This is an estimate that compares one year of interest on each side; it isn't financial advice, and it doesn't account for your emergency fund or minimum payments.
This is one of the most common money questions, and most calculators only tell you half of it. Paying down a credit card has a guaranteed return: every dollar you clear stops being charged the card's APR. Put $1,000 against a 22% card and you avoid about $220 of interest a year. That's the first side.
The second side is what that same dollar could have earned if you'd kept it in savings instead. At a 4% high-yield rate, $1,000 earns about $40 a year. So the honest comparison isn't "how much does paying the card save" on its own — it's that saving minus the interest you give up by not saving. The net is what actually matters, and this calculator shows both numbers so you can see it.
Almost always. Credit card APRs of 18–25% dwarf even the best savings rates, so a dollar against the card is worth far more than a dollar in savings. Whenever your card's APR is higher than your savings rate, paying the card is the mathematically better move — and the gap is usually large.
It does happen. If you're in a 0% promotional period, or carrying a low-rate balance below your savings APY, the cash earns more sitting in savings than the card costs you. In that case the calculator's verdict flips and tells you to keep the cash — because paying early would cost you the difference. Just watch the promo end date; the moment the rate resets, the math flips back.
Your emergency fund. It can be tempting to throw every spare dollar at a card, but draining your cushion to do it means the next surprise expense goes right back onto the card — often at a higher rate than you just paid off. Keep a buffer first, then attack the card with what's genuinely spare. If you're not sure how big that buffer should be, the emergency fund calculator works it out.
If your card's APR is higher than your savings rate — which is almost always the case — paying the card wins, because the interest you avoid is larger than the interest you'd earn. Enter your numbers above and the calculator shows the net and gives a verdict.
Yes, when your savings rate is higher than the card's APR — typically during a 0% promotional period. Then the cash earns more than the card costs, so keeping it invested beats paying early. The verdict flips to say so.
No. Keep a cash buffer for surprises first, then put what's genuinely spare toward the card. Emptying your cushion tends to send the next unexpected bill straight back onto the card. Size the buffer with the emergency fund calculator.
No. It compares one year of interest on the amount you'd apply, to keep the trade-off clear. Keep making at least your minimum payment on any balance you don't clear.
You can only pay off up to what you owe, so the calculator caps the amount applied at the balance. Anything left over stays as cash you can save or invest.
Connect your accounts and Thryvest weighs your real card APRs against your real savings rates — then shows the exact move, in dollars.
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