Missouri Remote Employee Tax Withholding: 8 Progressive Brackets

Missouri is a low-to-moderate tax state in the Midwest with eight progressive income tax brackets reaching a top rate of 4.70% for 2025, no reciprocity agreements with neighboring states, and significant recent wage-law changes following voter approval of Proposition A in November 2024. Missouri's top rate has been reduced in recent years under a 2022 tax cut law, with further reductions scheduled if revenue triggers are met. The state also imposes small earnings taxes in Saint Louis (1.00%) and Kansas City (1.00%) that affect residents and certain non-residents working in those cities. This guide walks through the Missouri tax landscape, residency rules, withholding for residents and non-residents, the absence of reciprocity, the Saint Louis and Kansas City earnings taxes, SUI through the Missouri Department of Labor and Industrial Relations (DOLIR), out-of-state employer obligations, the credit for taxes paid to other states, Missouri-specific wage laws including Proposition A, recent developments, and common payroll mistakes.

The Missouri Tax Landscape

Missouri levies a progressive individual income tax under the Missouri Income Tax Law (Missouri Revised Statutes Chapter 143), with eight brackets for 2025: 0.00% on the lowest bracket (income up to approximately $1,272 for single filers), then 2.00%, 2.50%, 3.00%, 3.50%, 4.00%, 4.50%, and 4.70% on income above approximately $8,944. The top rate was reduced from 4.80% in 2024 to 4.70% in 2025 under a 2022 tax cut law that provides for further reductions of 0.10 percentage points each year that revenue triggers are met, with a floor of 4.50%. Missouri brackets are indexed annually for inflation, and the Missouri Department of Revenue (MO DOR) publishes the annual bracket structure in the Missouri income tax booklet. On top of the state income tax, the cities of Saint Louis and Kansas City impose a 1.00% earnings tax on residents and on non-residents who work in the city, which is collected through payroll withholding.

For payroll purposes, Missouri imposes three employer-side obligations: state income tax withholding under the progressive brackets, State Unemployment Insurance (SUI) paid by the employer on the first $9,500 of wages per employee per year, and Saint Louis or Kansas City earnings tax withholding for employees who live or work in those cities. Missouri does not have a state disability insurance program, no state paid family leave program outside the new Proposition A paid sick leave requirement, and no local income tax outside the Saint Louis and Kansas City earnings taxes. The MO DOR administers income tax withholding and the earnings taxes, and the Missouri DOLIR administers SUI. The combined top marginal state rate of 4.70% is among the lower rates in the Midwest, exceeded in lowness by neighboring states including Illinois (flat 4.95%) and Indiana (flat 3.05%), and Missouri's recent tax cut trajectory makes the state increasingly attractive for remote workers.

Missouri Residency Rules

Missouri residency is determined under two tests: domicile and statutory residency, both codified in the Missouri Income Tax Law. Domicile is the place where an individual has their true, fixed, and permanent home and to which they intend to return whenever absent. Once established, domicile persists until the individual establishes a new domicile through physical presence in a new jurisdiction combined with intent to remain there indefinitely. The MO DOR applies a multi-factor domicile test that examines family location, business activities, time spent inside and outside Missouri, real and tangible property holdings, and persistence of Missouri ties such as voter registration, driver's license, vehicle registration, and banking relationships. Missouri residents are taxed on worldwide income regardless of where it is earned.

Missouri statutory residency applies when an individual maintains a permanent place of abode in Missouri and spends 183 or more days of the tax year inside Missouri. The 183-day threshold is the standard bright-line test, and Missouri counts any part of a day as a full day except for transit days. A part-year resident who established or abandoned Missouri domicile during the tax year files Form MO-1040 and reports income as a resident for the resident period and as a non-resident for the non-resident period using Form MO-NRI. Missouri does not have a special safe-harbor rule like New York's 30-day rule or California's 549-day rule, so any individual with significant Missouri presence should track day counts carefully. The MO DOR is generally less aggressive on residency audits than higher-tax states like New York or California, but residency audits do occur and the burden of proof is on the taxpayer. Missouri's moderate tax rate also reduces the financial stakes of residency disputes compared to high-tax states, although the Saint Louis and Kansas City earnings taxes add a local layer for residents of those cities.

Missouri Withholding for Residents

Missouri residents are subject to Missouri income tax on all income regardless of source, and employers must withhold Missouri income tax from wages paid to Missouri residents. The withholding calculation uses Form MO W-4, the Missouri Employee's Withholding Allowance Certificate, which is separate from the federal Form W-4. The MO W-4 collects the employee's withholding allowances and additional withholding amounts. For 2025 the Missouri standard deduction is $14,600 for single filers and $29,200 for married filing jointly, indexed for inflation, which reduces the taxable wage base before the brackets apply. The standard deduction is the same as the federal standard deduction, which simplifies the calculation. Missouri does not have personal exemptions separate from the standard deduction, having eliminated them in 2018.

The Missouri withholding formula applies the progressive brackets to taxable wages (gross wages minus the standard deduction and additional allowances). For an employee claiming one allowance on $50,000 annual wages, withholding is approximately $1,540 per year, reflecting the 0.00%, 2.00%, 2.50%, 3.00%, 3.50%, 4.00%, and 4.50% brackets up to $50,000. Supplemental wages (bonuses, commissions, and similar payments) are subject to Missouri supplemental withholding at 4.70% with no allowance adjustment, per the MO DOR withholding guide. Employees who have non-wage income or who expect to owe more than their withholding can request additional withholding on Form MO W-4. Employees can also claim exemption from Missouri withholding on Form MO W-4 if they had no Missouri income tax liability in the prior year and expect none in the current year, which is rare for wage earners. The 0.00% lowest bracket provides some relief for low-income earners, who may have minimal Missouri withholding even on full-time wages.

Missouri Withholding for Non-Residents

Missouri non-residents are subject to Missouri income tax only on Missouri-source income. For employees, Missouri-source income means wages earned while physically performing services in Missouri. A non-resident employee who works entirely outside Missouri for a Missouri employer has no Missouri-source wages and no Missouri withholding obligation. Non-resident withholding is computed by allocating the employee's annual wages across states based on days worked in each state, then applying Missouri withholding to the Missouri-allocated portion. Missouri does not enforce a convenience rule for non-resident employees of Missouri employers who work remotely outside Missouri, so a non-resident working remotely from another state has no Missouri-source wages.

Non-resident employees file Form MO-1040 and Form MO-NRI to report Missouri-source income and compute the non-resident tax. The non-resident tax is calculated by taking the Missouri tax on total income (as if the employee were a resident) and multiplying by the ratio of Missouri-source income to total income. Non-resident employees who expect to owe less Missouri tax than the withholding amount can request a withholding certificate on Form MO-W-4 to reduce or eliminate Missouri withholding, but Missouri does not have a reciprocity exemption form because it has no reciprocity agreements. Missouri also requires withholding on certain non-wage payments to non-residents, including gambling winnings over $5,000 and certain lottery winnings, per the MO DOR non-resident withholding rules. The Saint Louis and Kansas City earnings taxes apply separately to non-residents who work in those cities, regardless of Missouri income tax withholding status.

No Missouri Reciprocity

Missouri has no income tax reciprocity agreements with any other state, per the Missouri Department of Revenue. This means residents of neighboring states who commute to Missouri for work are subject to Missouri income tax on their Missouri-source wages, and Missouri residents who work in neighboring states are subject to the work state's tax with a credit claimed on the Missouri return. Illinois (flat 4.95%) and Missouri have a long history of cross-border commuting in the Saint Louis area, but there is no reciprocity agreement, so Illinois residents who work in Missouri pay Missouri income tax and claim a credit on their Illinois return. Similarly, Kansas residents who work in Kansas City, Missouri pay Missouri income tax and the Kansas City earnings tax, with a credit on their Kansas return.

Because Missouri has no reciprocity, cross-border commuters face the burden of filing two state tax returns each year. A Missouri resident who commutes to Illinois for work, for example, must file an Illinois non-resident return reporting Illinois wages and a Missouri resident return reporting worldwide income, claiming a credit on Form MO-CR for the Illinois tax paid. The credit is calculated as the lesser of the tax paid to the other state on the out-of-state wages or the Missouri tax attributable to those same wages, and the credit cannot exceed the Missouri tax on the out-of-state income. For high-tax work states like California (13.3% top rate) or New York (10.9% top rate), the Missouri credit is capped at Missouri's top rate of 4.70% on the out-of-state wages, and the Missouri resident bears the rate differential. SUI is paid to the state where the work is performed, so an Illinois resident working in Missouri has Missouri SUI paid by the Missouri employer.

Saint Louis and Kansas City Earnings Taxes

The cities of Saint Louis and Kansas City each impose a 1.00% earnings tax on residents and on non-residents who work in the city, under Missouri Revised Statutes Section 94.600 et seq. The earnings tax is a local income tax that is collected through payroll withholding by the Missouri Department of Revenue, not by the cities directly. Saint Louis residents pay the 1.00% earnings tax on all wages regardless of where they work, and non-residents who work in Saint Louis pay the 1.00% earnings tax on Saint Louis-source wages. Kansas City applies the same structure, with residents paying 1.00% on all wages and non-residents paying 1.00% on Kansas City-source wages. The earnings tax is on top of the Missouri state income tax, producing a combined top marginal rate of 5.70% (4.70% state plus 1.00% city) for Saint Louis or Kansas City residents at the top bracket.

Earnings tax withholding is required for employees who live or work in Saint Louis or Kansas City. The employer withholds the 1.00% earnings tax based on the employee's residence and work location, and remits the withholding to the MO DOR along with the state income tax withholding. The earnings tax is reported on the employee's W-2 as state and local income tax withholding, and the employee claims a deduction or credit on the federal return for the local tax paid. Out-of-state employers with Saint Louis or Kansas City remote employees must register for earnings tax withholding in addition to state income tax withholding, and the earnings tax applies to remote employees who work from home in Saint Louis or Kansas City even if the employer is located outside Missouri. The earnings tax is voter-approved and must be reauthorized by voters every five years; both cities have consistently reauthorized the tax, most recently in 2024.

Missouri SUI (DOLIR)

Missouri State Unemployment Insurance is administered by the Missouri Department of Labor and Industrial Relations (DOLIR), Division of Employment Security, under the Missouri Employment Security Law (Missouri Revised Statutes Chapter 288). The new employer SUI rate is approximately 2.4% for most non-construction industries, plus a 0.15% fund-building adjustment, producing an effective rate of approximately 2.55% for new employers. The SUI wage base is $9,500 per employee per year for 2025, which is above the federal minimum of $7,000 and equal to the wage base in neighboring Illinois. The maximum new-employer per-employee contribution is approximately $242 (2.55% × $9,500), which is moderate compared to neighboring states. After the initial period (typically three years), the rate becomes experience-rated based on the employer's benefit charge ratio and taxable payroll, with rates ranging from 0.51% to 9.99% under the standard tax schedule, plus the 0.15% fund-building adjustment and a 0.10% contingency reserve that applies when the trust fund balance falls below statutory thresholds.

Employers register for a DOLIR unemployment tax account through the Missouri UInteract system, which is separate from the MO DOR income tax withholding registration. Quarterly wage reports are due April 30, July 31, October 31, and January 31, with both wage detail and tax payment submitted on the same form. Late or missing returns generate penalties, and DOLIR actively audits employers who fail to register or file. Missouri also requires new-hire reporting to the Missouri State Directory of New Hires within 20 calendar days of hire, which is used for child support enforcement and other state purposes. Missouri's SUI cost is moderate compared to neighboring states, with the new employer rate slightly higher than Illinois (approximately 3.55% but at $14,000 wage base) and slightly lower than Iowa (approximately 1.0% at $37,300 wage base).

Out-of-State Employer With a Missouri Remote Employee

An out-of-state employer that hires a Missouri remote employee creates Missouri payroll tax nexus and must register with both the Missouri Department of Revenue for an income tax withholding account and the Missouri DOLIR for an SUI account. If the employee lives or works in Saint Louis or Kansas City, the employer must also register for earnings tax withholding through the MO DOR. The registrations are separate and produce separate account numbers. The MO DOR withholding registration is completed online through the Missouri MyTaxCube system, and the DOLIR SUI registration is completed through UInteract. Both registrations typically take five to ten business days to process. Foreign-entity registration with the Missouri Secretary of State may also be required for corporations and LLCs transacting business in Missouri, although Missouri has relatively permissive foreign-entity rules.

Once registered, the out-of-state employer must withhold Missouri income tax under the progressive brackets from the remote employee's wages, file quarterly withholding returns through MyTaxCube, and file annual reconciliation with the MO DOR by January 31. The employer must also pay SUI on the first $9,500 of the Missouri employee's wages, file quarterly wage reports through UInteract, and report new hires to the Missouri State Directory of New Hires. If the employee lives or works in Saint Louis or Kansas City, the employer must also withhold the 1.00% earnings tax and remit it with the state income tax withholding. The employee must complete Form MO W-4 for state withholding calculations. The employer must also secure Missouri workers' compensation coverage, comply with the Missouri Wage Payment Law, and comply with Missouri equal pay laws and the Proposition A paid sick leave requirement.

Missouri Resident Working for an Out-of-State Employer

A Missouri resident who works remotely for an out-of-state employer is still subject to Missouri income tax on all wages, regardless of where the employer is located. Missouri taxes its residents on worldwide income. The out-of-state employer should register with the MO DOR and withhold Missouri income tax from the resident employee's wages, although many out-of-state employers fail to do this initially and the resident must make estimated tax payments to cover the Missouri liability. If the work state also taxes the resident (because the work state does not have reciprocity with Missouri — and no state has reciprocity with Missouri — and sources wages to the employer's state), Missouri provides a credit for taxes paid to other states on Form MO-CR.

The credit is calculated as the lesser of the tax paid to the other state on the out-of-state wages or the Missouri tax attributable to those same wages. Because Missouri applies progressive brackets with a top rate of 4.70%, the credit calculation is more complex than in flat-tax states, but the credit cannot exceed the Missouri tax on the out-of-state income. For high-tax work states like California (13.3% top rate) or New York (10.9% top rate), the Missouri credit is capped at the Missouri tax attributable to the out-of-state income (up to 4.70% at the top bracket), and the Missouri resident bears the rate differential. For low-tax work states like Illinois (flat 4.95%), the Missouri credit may fully offset the Illinois tax for high-income earners but not for low-income earners, because Missouri's bottom rate of 0.00% is lower than the Illinois flat 4.95%. Missouri does not enforce a convenience-of-the-employer rule, so a Missouri resident who works remotely from Missouri for a New York or Connecticut convenience-rule state will be taxed by Missouri on the wages and may also be taxed by the work state, with the credit mechanism applying. Saint Louis and Kansas City residents also owe the 1.00% earnings tax on all wages regardless of where the employer is located, which adds to the effective tax rate for those residents.

Missouri-Specific Wage Laws

The Missouri Wage Payment Law (Missouri Revised Statutes Chapter 290) governs the timing and method of wage payment for Missouri employees. Wages must be paid at least semimonthly on regular paydays designated in advance, and final paychecks must be delivered within 24 hours of a demand for wages (for involuntary terminations) or by the next regular payday (for voluntary separations). Accrued unused vacation must be paid out at separation if the employer's policy provides for vacation, and Missouri enforces this rule through the DOLIR. Violations of the Wage Payment Law can result in damages plus attorney's fees, and Missouri has become more employee-friendly in wage-and-hour enforcement in recent years.

The Missouri minimum wage is $12.30 per hour for 2025, per the Missouri Department of Labor and Industrial Relations, following voter approval of Proposition A in November 2024. Proposition A mandates annual increases, reaching $15.00 per hour by 2026 and indexed annually for inflation thereafter. The tipped minimum wage is $6.15 per hour for 2025, with tips making up the difference to the standard rate, and the tip credit is being phased out under Proposition A. Proposition A also requires employers to provide paid sick leave, accrued at 1 hour per 30 hours worked, with employees eligible to use the leave beginning 90 days after hire. The paid sick leave requirement applies to all employers with employees in Missouri, regardless of size, and is the most significant recent wage-law change in the state. Missouri also enforces the Missouri Service Members' Employment and Reemployment Rights Act and the Missouri Human Rights Act, which prohibits employment discrimination on the basis of protected characteristics.

Recent Missouri Tax Developments

The most significant recent Missouri tax development is the November 2024 voter approval of Proposition A, which raised the minimum wage to $12.30 per hour for 2025 (from $12.00 in 2024), mandates further increases to $15.00 per hour by 2026, indexes the rate annually for inflation thereafter, and requires employers to provide paid sick leave accrued at 1 hour per 30 hours worked. Proposition A is the most significant wage-law change in Missouri in recent years and affects all employers with Missouri employees, including out-of-state employers with remote workers in the state. Employers should update payroll systems to reflect the new minimum wage and the paid sick leave accrual, and should track the accrual and carryover for each employee.

The second major development is the ongoing reduction in the Missouri income tax top rate under the 2022 tax cut law. The top rate was reduced from 4.95% (2022) to 4.95% (2023) to 4.80% (2024) to 4.70% (2025), and further reductions of 0.10 percentage points each year are scheduled if revenue triggers are met, with a floor of 4.50%. The revenue trigger requires that state general fund revenue for the prior fiscal year exceeds the prior year's revenue by at least 3%, with the trigger evaluated annually by the MO DOR and the state legislature. Missouri also eliminated the lowest income tax bracket (the 1.50% bracket) in 2023, which had previously been eliminated and replaced with a 0.00% bracket. The Missouri SUI wage base remains at $9,500, and the new employer rate of approximately 2.4% (plus the 0.15% fund-building adjustment) is stable for 2025. The Saint Louis and Kansas City earnings taxes were reauthorized by voters in 2024 and remain at 1.00% for 2025. Out-of-state employers with Missouri remote employees should monitor the annual income tax rate reduction trajectory and update payroll systems each January to reflect the new rate.

Common Missouri Payroll Mistakes

The most common Missouri payroll mistake is failing to update payroll systems for the Proposition A minimum wage increase and paid sick leave requirement. The minimum wage increased to $12.30 per hour for 2025, and the paid sick leave requirement applies to all employers with Missouri employees regardless of size. Failure to comply produces significant back-wage and penalty exposure. The second common mistake is failing to register for both the MO DOR withholding account and the DOLIR SUI account — these are separate registrations, and missing one of them produces back-tax exposure with the corresponding agency.

The third common mistake is mishandling the Saint Louis and Kansas City earnings taxes for employees who live or work in those cities. The 1.00% earnings tax applies to residents on all wages and to non-residents on city-source wages, and failure to withhold produces back-tax exposure and employee refund problems at year-end. The fourth common mistake is failing to file quarterly withholding returns even in zero-wage quarters, which generates penalties. The fifth common mistake is mishandling supplemental wages — Missouri supplemental withholding is 4.70% with no allowance adjustment, and applying the standard formula to bonuses produces incorrect withholding.

The sixth common mistake is failing to file annual reconciliation with the MO DOR by January 31, which generates per-form penalties. The seventh common mistake is mishandling non-resident withholding for employees who split time between Missouri and neighboring states, particularly the allocation of wages based on days worked in each state. The eighth common mistake is failing to claim the credit for taxes paid to other states on Form MO-CR for Missouri residents who work in neighboring states, which can result in significant double taxation. The ninth common mistake is failing to update payroll systems each January to reflect the annual income tax rate reduction under the 2022 tax cut law, producing incorrect withholding for the year.

What to Do Next

Audit your Missouri payroll compliance using the nine common mistakes above. Verify that your MO DOR withholding account and DOLIR SUI account are both active and that quarterly withholding returns and SUI wage reports are filed on time, including zero returns for no-wage quarters. Confirm that SUI contributions stop at the $9,500 wage base per employee and that the new employer rate of approximately 2.55% (including the fund-building adjustment) is correctly applied in your payroll system. Verify that the current Missouri income tax top rate of 4.70% is applied in your payroll system and that Form MO W-4 is on file for every Missouri employee. Verify that the Saint Louis and Kansas City earnings taxes are correctly withheld for employees who live or work in those cities, including remote employees who work from home in those cities. Confirm that the $12.30 per hour minimum wage for 2025 is applied and that Proposition A paid sick leave accrual and carryover are properly tracked. If you have a Missouri resident working for an out-of-state employer, confirm that the credit for taxes paid to other states is being claimed on Form MO-CR. Monitor the annual Missouri income tax rate reduction trajectory and update payroll systems each January to reflect the new rate. Run our multi-state withholding calculator for each Missouri employee to verify the full federal, state, and city payroll picture.