PaymentMath is an independent publication of Ecomparadise, LLC, an Ohio limited liability company. Any affiliate commissions are paid to Ecomparadise, LLC, the publisher of PaymentMath.
Last updated: October 23, 2026. PaymentMath is free because it is supported by advertising and, on some pages, affiliate links. This page explains how that works.
Lenders and financial products
PaymentMath does not currently have any lender, broker or financial-product partnerships, and no calculator result is influenced by one. If that changes, partner placements will be labelled "Partner" next to the offer and listed here.
Advertising
The site may display ads from Google AdSense. Ads are clearly separated from calculator results and are never presented as recommendations.
Our rules
- We only link a product or service where it genuinely helps with the task on the page.
- Affiliate relationships never change a formula, a data point or a result.
- We do not accept payment for reviews, and we do not publish reviews of products we have not evaluated.
- Affiliate links are marked with
rel="sponsored"and a short notice next to the link.
Questions? Contact us.