St. Louis, MO Payroll Tax Registration

Oct 30, 2025

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.

Ohio CAT Tax: Rates, Filing, and Due Dates (2024)

The business world moves fast, and Ohio isn’t standing still. If you’re running a business in the Buckeye State or have employees there, you’ve probably heard about the Ohio Commercial Activity Tax (CAT). It’s not exactly new, but the rules of the game are about to change significantly. Starting January 1, 2024, Ohio rolled out major revisions to the CAT, and if you’re not paying attention, you could miss out on some serious savings or even get caught off guard by unexpected tax bills.

Gabrielle Sinacola | Aug 7, 2024

Summary Annual Report Requirements and Deadline

If you’re like most business owners, your company’s annual report isn’t the most exciting part of your job. Thankfully, the Summary Annual Report (SAR) makes things easier on this front. You may already be familiar with annual reports your business submits to the Secretary of State in each state in which it is registered to do business. The SAR is a bit different from those and is required on the federal level.

Kaitlin Edwards | Jun 16, 2024

Telehealth Worker Classification: Risks, Consequences, and Tips

The telehealth boom isn’t slowing down. But with rapid growth comes a critical challenge many companies overlook—telehealth worker classification. Get it wrong, and you’re facing more than just paperwork headaches. Companies could see serious fines, legal battles, and damaged reputations that can sink even the most promising healthcare venture. This isn’t just another compliance checkbox. Worker misclassification can trigger penalties reaching tens of thousands per worker. It can spark class-action lawsuits and multi-state audits. Worst of all, it can destroy the trust you’ve built with both patients and professionals. Today, we’re breaking down everything you need to know about classification risks, consequences, and smart solutions that work.

Paul Boynton | Jul 31, 2025

Ready to get started?

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