Use this page to report calculation errors, accessibility problems, privacy concerns, security issues or advertising inquiries. Never send bank credentials, identification documents or full account numbers.

What to include

• The page, browser and device where the issue occurred.
• Steps to reproduce the issue and the result you expected.
• For calculation questions, an example with all personal information removed.

Support address

Email [email protected]. Include only the minimum information needed to explain the issue.

Security reports

Report suspected exposure to the support address rather than posting it publicly. The service will never ask for a password, one-time authentication code or complete bank-account number.