Klarna/Afterpay Invisible Debt Tracker
Buy Now Pay Later Calculator — Hidden Total Cost
What this calculator does
Buy-now-pay-later apps split purchases into small payments. This calculator adds them up so you see the total monthly commitment and spending.
The math, with a worked example
Total monthly BNPL = sum of all entered payments. Total purchase cost = sum of all entered item costs. Three payments of $45, $60, and $80 add up to $185 in purchases and a $185 monthly commitment if they all hit this month.
Why this matters
BNPL's trick is plural: each $45 plan is easy, but 3 of them is a $185 monthly commitment with no statement adding it up for you. The sum is the product — nobody offers it because nobody profits from you seeing it.
Methodology and transparency
Monthly total = sum of every active plan's payment; purchase total = sum of the items. Simple addition, deliberately: the danger isn't any plan's terms, it's the stacking — and late or missed BNPL payments increasingly report to credit bureaus and trigger fees the model doesn't price. List every active plan, including the ones on other apps. Everything runs in your browser; no data is sent or stored.
Last reviewed: 2026-08-08
Common questions
Is BNPL debt?
Yes. It is a short-term installment obligation. Missing payments can hurt your credit and trigger fees.
Why do small payments feel invisible?
Because each one is small, but several together can consume a large chunk of your monthly budget.
How do I stop the BNPL drain?
Pause new purchases, pay off existing plans, and track the total monthly commitment in your budget.