About Calc-HQ

What This Site Is

Calc-HQ is a hub for a network of free financial calculators focused on US federal tax, take-home pay, payroll timing, compensation comparison, and self-employment income. The calculators are grouped by problem type so visitors can find the right tool without having to know the tool's name in advance.

The network covers common questions that come up around payday, tax season, and job changes — questions like "What will I actually take home?", "When will my direct deposit arrive?", "How much do I owe in quarterly estimated taxes?", and "Is a contractor rate worth more than a salaried offer?"

How the Calculators Are Built

Every calculator in the network runs in the browser. No financial inputs are sent to a server. Calculations use deterministic logic sourced from US government publications:

• IRS — Federal income tax brackets, standard deductions, and withholding rates, sourced from IRS Revenue Procedures and Publication 15.
• SSA — Social Security and Medicare (FICA) wage bases and rates, sourced from annual SSA COLA announcements.
• OPM — Federal holiday schedule used for payroll timing and business day calculations, sourced from the Office of Personnel Management annual release.
• NACHA — ACH processing windows and business day rules used in banking cutoff and payroll date calculators, sourced from NACHA operating rules.

Rate values are reviewed and updated annually when the relevant authoritative sources publish new figures. For a full description of the calculation approach, see the Methodology page.

What These Calculators Are Not

These are estimation tools for informational use. They do not account for state or local income taxes unless explicitly noted, and they are not a substitute for a tax professional, CPA, or licensed payroll service. Results should be confirmed against IRS publications or with a qualified professional before being used for filing, payroll processing, or financial planning decisions.

No Accounts. No Data Stored.

The hub and all linked calculator sites are designed without accounts, logins, or data storage. You do not need to register to use any tool. Financial inputs you enter are not collected, logged, or transmitted.

Contact

For partnership and sponsorship inquiries, email [email protected].

To report a calculation error or a stale rate value, include the calculator name, the inputs used, the result received, and the authoritative source for the expected value. Confirmed errors are corrected in the next update cycle.