Contact Us
We built PennyCalc because we wanted financial calculators that actually show their work. If you have questions, found a bug, or want to suggest a feature, we’d love to hear from you.
How to Reach Us
The best way to get in touch is by email. We read every message and typically respond within 1–2 business days.
Email: [email protected]
What We Can Help With
Bug Reports
Found a calculation that doesn’t look right? Please include the inputs you used and what you expected. Every calculator is tested, but edge cases happen — and we fix them fast.
Feature Requests
Want a new calculator or an option we don’t support yet? We prioritize features based on user feedback. Tell us what you need and how you’d use it.
Data Accuracy
Tax rates, contribution limits, and insurance averages change every year. If you spot outdated data, let us know and we’ll update it promptly.
General Questions
Have a question about how a calculator works, what assumptions we use, or how your data is handled? We’re happy to explain. (Spoiler: your data never leaves your browser.)
About PennyCalc
PennyCalc was started by a private-equity analyst who got tired of black-box financial calculators. Every tool on this site models the math the same way we model it at work — transparently, with every assumption stated and overridable.
We currently offer 16 financial calculators covering mortgages, investing, retirement, taxes, and debt — each with state-specific data where relevant. All calculations run entirely in your browser with zero data collection.
Learn more on our About page, or review our Privacy Policy and Terms of Service.
Response Times
We’re a small team, but we take every message seriously. Bug reports and data accuracy issues are prioritized. Feature requests are tracked and reviewed monthly. You’ll typically hear back within 1–2 business days.