Questions & corrections

A number doesn’t look right?

Start with the assumptions. If a result still looks wrong, a small example is the most useful way to describe it.

Email [email protected] for calculation corrections, accessibility issues, or suggestions.

What helps us check an issue

Include the calculator page, the field values you used, the result you expected, and the source behind that expectation. Rounded sample numbers are enough. For an accessibility problem, mention your browser and assistive technology if you can.

Do not send employee names, Social Security numbers, payroll records, account credentials, or other sensitive information. We do not need those details to check the math.

For questions about your payroll

Your payroll provider or relevant tax agency can confirm the rates and rules that apply to your business. Our source list and methodology explain the federal parameters used here.