Privacy Policy
Last updated November 8, 2026
The short version
The numbers you type into our calculators stay in your browser. We do not ask for your name, email, or any account, and we do not sell personal information.
Information we collect
- Calculator inputs: processed only on your device. If you use "Copy link," your inputs are placed in the web address so you can share them; they are not stored by us.
- Server logs: our hosting provider (Amazon Web Services) may record standard request data such as IP address, browser type, and pages requested, for security and reliability.
- Messages you send us: if you email us, we keep your message and email address to reply.
Advertising and cookies
We may show ads served by Google and other advertising partners. These third-party vendors, including Google, use cookies to serve ads based on your prior visits to this and other websites. Google's use of advertising cookies enables it and its partners to serve ads to you based on your visits to this site and/or other sites on the internet.
You can opt out of personalized advertising by visiting Google Ads Settings, or opt out of many third-party vendors' use of cookies at aboutads.info. Learn more abouthow Google uses information from sites that use its services.
Visitors in the European Economic Area, the UK, and Switzerland will be asked for consent before personalized ads or non-essential cookies are used.
Affiliate links
Some links may be affiliate links. If you click one and apply for a product, we may earn a commission at no cost to you. This never changes our calculator results.
Your rights
Depending on where you live (for example, California or the EU), you may have rights to access, delete, or limit the use of your personal information. Contact us at contact@paymentmath.com to make a request.
Children
This site is not directed to children under 13, and we do not knowingly collect information from them.
Changes
We will post any changes to this policy on this page and update the date above.