St. Louis, MO Payroll Tax Registration

Jan 8, 2026

If you are an employer in St. Louis, Missouri, it is important to be aware of the local payroll tax requirements for businesses operating in the city. These requirements may include registering your business with the city and withholding a certain percentage of your employees' wages for local taxes.

How to Register for Payroll Tax in St. Louis

St. Louis, Missouri Local Earnings Tax Withholding and Payroll Expense Tax Setup for Corporation, LLC, LLP, Professional Corporation, PLLC

Every employer with employees living or working in the City of St. Louis must withhold St. Louis City earnings tax on their gross earnings. In addition, city-resident employers must also withhold earnings taxes on all employees regardless of work location. Businesses in St. Louis must open an earnings tax account before operating in St. Louis. Unless exempted, only companies with employees working in the City of St. Louis must pay Payroll Expense tax.

  1. Complete an Application for Earnings Tax Account

    Complete a City of St. Louis Application for Earnings Tax Account form.

  2. File Your Application for Earnings Tax Account

    File your completed Application for Earnings Tax Account form with the St. Louis Earnings Tax Department by email.

Documents and Resources

St. Louis, MO Payroll Registration Agencies

Use Mosey to register for payroll accounts in St. Louis.

Register for payroll taxes with the state of Missouri

How to register your business in more Missouri cities

See all

More from the blog

Learn how to keep your business compliant in all 50 states across payroll, HR, Secretary of State, and tax.

EU AI Act: What U.S. Companies Need To Know

The Europe AI Act offers a fresh legal framework designed to promote artificial intelligence innovation while safeguarding basic rights and safety. AI systems are classified by several different levels of risk: forbidden, high-risk, restricted risk, and minimal risk, or no risk. U.S. enterprises have to comply if they provide AI-related services in the EU, include AI in goods sold by EU-based companies, or handle EU citizens’ data.

Alex Kehayias | Jul 25, 2024

Case Study: MediaRadar

How MediaRadar Navigated a Multi-State PEO Transition and Centralized Compliance with Mosey MediaRadar transitioned off a PEO and onboarded 350 employees across 40 states—saving over 80 hours and thousands in labor costs while streamlining compliance with Mosey. “If you’re moving off a PEO, Mosey is the system you wish you had from day one. It saves time, reduces stress, and gives your team the confidence that you’re not missing anything.”

Paul Boynton | May 14, 2025

Oregon Transit Payroll Taxes for Employers Compliance Guide (2024)

Most states can set their own local income taxes to help them meet their needs. Oregon utilizes this privilege in the form of transit payroll taxes, which are used to fund public transportation across the state of Oregon. There are several types of transit tax, and employers may be responsible for collecting and remitting them depending on the circumstances. Compliance with state tax rules can be complicated, but Mosey is here to make things easy. Here’s what Oregon employers need to know about the state transit tax and how Mosey can help with business compliance.

Gabrielle Sinacola | Jul 28, 2024

Ready to get started?

Schedule a free consultation to see how Mosey transforms business compliance.