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Found an error in a formula, want to suggest a new calculator, or explore a partnership? We welcome feedback from founders, homebuyers, and finance professionals who use our tools.

What to include

For formula corrections, please share the calculator URL, the inputs you used, the result you expected, and a link to an official source (IRS publication, HMRC guidance, lender documentation, etc.). This helps us verify and fix issues quickly.

We aim to respond within five business days. We cannot provide personalized tax, legal, or mortgage advice by email — for those matters, consult a licensed professional in your jurisdiction.