¢ CentCalc

Privacy Policy

Last updated: June 16, 2026

TL;DR

Calculator inputs and results never leave your browser. We don't know your salary, your debts, or your savings. We don't have a database of your numbers. We couldn't share them even if asked.

The detail

1. What we collect

CentCalc collects minimal information necessary to operate the Site and serve ads:

  • Anonymous analytics (optional, opt-out): aggregate page views, country, device type — used to improve the Site. No user-identifying data.
  • Feedback widget content: if you submit feedback via the 💬 widget (bottom-right), your message and (optionally) your email address are sent to our feedback service.
  • Standard server logs: our hosting provider (Vercel) and ad network (Google AdSense) automatically log IP address, user agent, and request timestamps.

2. What we DO NOT collect

All calculator inputs — including salary, debts, savings balances, mortgage amounts, tax filing status, state of residence, etc. — are processed entirely in your browser via JavaScript. They are not transmitted to our servers and we have no way to access them.

3. Cookies and similar technologies

The Site uses cookies and similar technologies for:

  • Advertising: Google AdSense uses cookies to serve ads based on prior visit history. You can opt out of personalized advertising via Google's Ads Settings.
  • Essential functionality: user preference storage (e.g., calculator last-used values via localStorage, which stays in your browser).

Third-party vendors, including Google, use cookies to serve ads based on a user's prior visits to this and other websites. Google's use of advertising cookies enables it and its partners to serve ads based on your visit to this site and/or other sites on the Internet.

You may opt out of personalized advertising by visiting Google Ads Settings. For EU/EEA/UK users, see our Cookie Consent notice (shown on first visit).

4. Third-party services

5. Your rights

If you are located in the European Economic Area, United Kingdom, or California, you have certain rights regarding your personal data:

  • GDPR (EU/UK): right to access, rectify, erase, restrict, port, and object
  • CCPA/CPRA (California): right to know, delete, correct, and opt-out of sale

We do not sell personal data. To exercise any right, contact us.

6. Data retention

  • Server logs: 30–90 days (Vercel default)
  • Feedback submissions: 24 months from submission
  • Calculator inputs: 0 days (never collected)

7. Children's privacy

The Site is not directed to children under 13. We do not knowingly collect personal information from children under 13 (COPPA). If you believe we have inadvertently collected such information, please contact us for deletion.

8. International data transfers

Your data may be processed in the United States or other countries where our service providers operate. By using the Site, you consent to these transfers in accordance with applicable data protection laws.

9. Changes to this policy

We may update this Privacy Policy from time to time. Material changes will be reflected by updating the "Last updated" date at the top.

10. Contact

Questions about privacy? Contact us.