Missouri Paycheck Calculator

A Missouri paycheck calculator estimates net pay after federal income tax, Social Security, Medicare, Missouri withholding and any local earnings tax or payroll deductions that apply. Location matters more in Missouri than in many states because Kansas City and the City of St. Louis each impose a 1 percent earnings tax on covered wages.

Start With Gross Pay for the Correct Pay Frequency

Gross pay is the starting point for every Missouri paycheck estimate. Salary employees convert annual salary into the selected payroll frequency while hourly employees calculate regular wages from rate and hours then add overtime, bonuses, commissions or other earnings.

• Weekly payroll generally uses 52 regular pay periods per year.
• Biweekly payroll generally uses 26 regular pay periods per year.
• Semimonthly payroll generally uses 24 regular pay periods per year.
• Monthly payroll generally uses 12 regular pay periods per year.

The selected frequency affects both the gross amount per check and the withholding calculation. A biweekly paycheck should not be calculated as though it were semimonthly payroll.

Missouri Withholding Uses Form MO W-4 and the 2026 Formula

Missouri employers use a completed Form MO W-4 to determine the employee's state withholding setup. The 2026 Employer's Tax Guide provides the withholding formula, standard deduction amounts, payroll-period method plus current tax rates used to estimate the Missouri amount withheld from wages.

Missouri withholding is not simply a flat percentage of gross pay. The employer first annualizes gross taxable income, applies the standard deduction for the employee's filing status, calculates annual withholding through the current rate schedule then converts the result back to the employee's payroll period.

For the broader state tax rules behind those calculations, use the Missouri income tax guide. The paycheck calculator should focus on the employee's current gross-to-net result.

Bonuses and Separately Paid Overtime Can Use a 4.7 Percent Missouri Method

Missouri treats supplemental wages differently when they are paid separately from regular wages. The 2026 Employer's Tax Guide allows a flat 4.7 percent withholding method for separately paid supplemental wages, or the employer can combine the supplemental and regular wages then calculate the difference under the normal formula.

If overtime or a bonus is included in the normal wage payment, the regular withholding formula applies to the total payment. A paycheck calculator should therefore know whether supplemental pay is included with regular wages or paid separately.

Kansas City and St. Louis Can Add a 1 Percent Local Earnings Tax

Local earnings tax can materially change a Missouri take-home pay estimate. Kansas City, Missouri imposes a 1 percent earnings tax on residents plus nonresidents who earn covered compensation within the city. The City of St. Louis also imposes a 1 percent earnings tax on residents plus nonresidents who work in the city.

Work location and residence can therefore matter. A statewide Missouri calculator that ignores local tax may overstate take-home pay for an employee who is subject to either city earnings tax.

Federal Withholding and FICA Still Apply Before Net Pay

Federal income tax depends on the employee's Form W-4 information, taxable wages and pay frequency. Social Security and Medicare are separate federal payroll taxes that apply to covered wages.

For 2026, the employee Social Security rate is 6.2 percent on covered wages up to $184,500. Medicare is generally 1.45 percent with no wage base limit. The employer must also withhold 0.9 percent Additional Medicare Tax after Medicare wages paid to the employee exceed $200,000 during the calendar year.

Pre-Tax Deductions Can Change Federal and Missouri Taxable Wages

Pre-tax benefit deductions can change take-home pay by reducing taxable wages for one or more taxes. The exact treatment depends on the benefit, which is why a calculator should distinguish a pre-tax retirement contribution from a post-tax deduction.

A traditional 401(k) contribution typically reduces federal income tax wages but does not reduce Social Security or Medicare wages. Health plan deductions can follow a different tax treatment. Use the employer's actual payroll setup when entering these amounts.

Why YTD Wages Matter for High Earners

Year-to-date wages matter when an employee approaches annual payroll tax thresholds. Without YTD Social Security wages, a calculator can continue withholding 6.2 percent after the employee has already reached the $184,500 wage base.

YTD Medicare wages also help identify when the $200,000 employer withholding threshold for Additional Medicare Tax is crossed. For higher-paid employees, a calculator that ignores YTD wages can produce a materially different result from live payroll.

Example Missouri Gross-to-Net Workflow

A reliable Missouri estimate follows the same sequence each pay period: calculate gross wages, apply eligible pre-tax deductions, estimate federal withholding, calculate FICA, calculate Missouri withholding, add Kansas City or St. Louis earnings tax when applicable, subtract remaining deductions then arrive at net pay.

The sequence is more important than a single advertised tax percentage. Two employees earning the same gross amount can receive different net pay because filing status, locality, benefits, extra withholding and YTD wages differ.

Turn the Final Payroll Result Into an Earnings Statement

A paycheck calculator estimates the payment while a pay stub records the completed payroll period. Once the employer has verified actual earnings and deductions, the final record should match the amount paid to the employee.

The Missouri pay stub generator can organize those genuine payroll figures into a clear earnings statement after the calculation is complete.

Missouri Paycheck Calculator for Small Businesses

A small business can use the calculator to review common payroll scenarios before the pay run is finalized. It is particularly useful for comparing pay frequencies, testing a benefits change or checking whether an employee's Kansas City or St. Louis location changes the expected take-home pay.

The calculator result remains an estimate. Employers should rely on current Missouri Department of Revenue rules, city tax requirements plus federal payroll guidance when processing the actual payroll.

When the calculation has been reconciled, a check stub generator can help present the verified wage, tax and deduction information in a consistent format.

2026 Accuracy and E-E-A-T Notes

A trustworthy payroll calculator should state the tax year, identify the official rules used and explain important limitations. Missouri payroll is sensitive to filing status, local earnings taxes, pay frequency, supplemental wages and the employee's MO W-4 information.

Tax law and local rules can change. Results should be reviewed against current official guidance before payroll is finalized, especially when a worker has multiple jobs, a nonstandard compensation arrangement or work split between locations.