Pay Down calculates the true cost of every credit card purchase after interest — and gives you free calculators to plan your way out of debt.
Pay Down breaks down interest purchase by purchase, so you can see exactly where your money is going — and plan a way out.
See the true cost of every credit card purchase after interest. Free payoff, balance transfer, and minimum payment calculators. Available on iOS and Android.
See what a credit card purchase really costs after interest — no signup, no download. Start with the True Cost Calculator.
Featured Story
"Most people know carrying a balance is expensive. Almost no one knows what each purchase actually costs them. Six months of per-purchase tracking taught me more about my spending than a decade of statements."
I Tracked the True Cost of Every Purchase for 6 Months — Here's What Changed
Read the story →Paying the statement balance in full by the due date preserves the grace period and avoids interest on new purchases. This article explains what each balance means, when paying more makes sense, and what happens when money is tight.
August 20, 2026
Carrying a credit card balance suspends your grace period, but paying the full statement balance — and a small trailing-interest charge the next cycle — restores it. Recovery typically takes one to two full statement cycles.
August 20, 2026
Paying the full statement balance doesn't always end a credit card's interest charges. Trailing interest — also called residual interest — accrues daily between the statement closing date and the day a payment posts, then appears on the next bill.
August 20, 2026