How a Florida paycheck works
Florida does not tax personal income, and the ban is constitutional rather than a matter of policy: Article VII of the state constitution forbids the legislature from levying an income tax on natural persons. No Florida city or county levies one either. What leaves a Florida payslip is therefore entirely federal: income tax withheld under Form W-4, Social Security and Medicare. The state pays its bills mainly through sales tax and, locally, property tax, and neither touches payroll.
Federal income tax withholding
The employer annualises the wage, subtracts the standard deduction for the filing status marked in Step 1 of Form W-4, runs the remainder through the progressive schedule for that status, and subtracts any dependent credit claimed in Step 3. This calculator reproduces that annual computation for a W-4 with Steps 2 and 4 left blank: one job, no spouse income, no other income and no extra withholding. Single filers and married-filing-separately share a schedule; married filing jointly and head of household each have their own.
The dependent credit is claimed in full while income stays under the statutory limit for the status. Past that limit it shrinks by a fixed amount for each thousand dollars of excess, and the calculator applies the reduction gradually so the estimate does not jump at the threshold.
Social Security and Medicare
Social Security is withheld at a flat rate on wages up to an annual wage base that is re-indexed every year; earnings above the base are exempt, which is why the effective rate of a large salary levels off. Medicare has no wage base. Once calendar-year wages pass a fixed threshold the employer must also withhold the Additional Medicare tax on the excess, regardless of filing status, and the employer does not match that piece.
What the employer pays on top
The employer section shows the matching Social Security and Medicare contributions plus federal unemployment tax at its usual net rate after the credit for state unemployment tax. Florida's own unemployment levy, called reemployment tax, is charged to the employer alone on a small wage base at a rate that depends on the company's claims history, so it is not shown. Workers' compensation is insurance, not a payroll deduction.
What this calculator assumes
The figure models a salaried employee paid evenly across the year on a standard Form W-4 with no pre-tax deductions. It leaves out:
- Pre-tax contributions such as a 401(k), health premiums, HSA or a flexible spending account, which lower the wages subject to income tax and often to FICA.
- Extra withholding requested on the W-4, and the Step 2 and Step 4 adjustments for a second job, a working spouse or other income.
- Bonuses and other supplemental wages, which employers may withhold at a flat supplemental rate instead.
- Employer-side state unemployment insurance, which is priced per employer, and any federal unemployment credit reduction.
- Employees outside the normal Social Security system, such as some public-sector staff and certain visa holders.
Withholding versus your final tax bill
Withholding is a prepayment, not the tax itself. The annual return replaces the standard assumptions with your real situation: itemised deductions when they beat the standard one, investment or freelance income, and credits the payroll system knows nothing about. Employees with one job usually see a refund; two jobs, a working spouse or significant investment income often produce a balance due. Use this page for monthly budgeting and a full return estimate for the year.