Contact Trefid Calculators
Use email for calculator feedback, corrections, site issues, or general enquiries.
What to include
If you are reporting a calculator issue, include the values you entered, the result you expected, and the device or browser where you saw the issue. This helps reproduce and correct the problem.
Corrections
Calculator corrections are easiest to review when the report includes the page URL and the exact inputs used. If the issue involves a rate, threshold, tariff, or published figure, include the source you expected the page to use.
Site and advertising issues
If an advert, layout problem, broken link, or accessibility issue gets in the way of using a calculator, include the page URL and a brief description of what happened. Trefid aims to keep the calculator and explanatory content easy to access on mobile and desktop.
Privacy note
Trefid does not use a contact form on this page. If you email us, your email provider and ours will process the message in the normal way.