Missouri Business Taxes: Rates, Agencies, and Filing Guide

Missouri Business Tax Overview: Key Agencies and Accounts

Operating a business in Missouri requires coordinating registrations and filings across state, federal, and local offices. Each agency issues its own identification number and manages distinct tax or reporting rules. Before you file your first return, check the table below to see which of the five government bodies apply to your operations. Local municipalities and counties also issue local business operating licenses directly, as the Secretary of State does not issue local licenses.

• sos.mo.gov: Starting a Business
• labor.mo.gov: Tax Rates

Registering Your Business and Tax Accounts in Missouri

Your registration sequence starts with creating your legal entity, getting a federal tax number, and then opening your state tax accounts. Following this order prevents delays, since the state tax application asks for your Secretary of State charter number and your Federal EIN.

According to the Missouri Secretary of State, filing Articles of Organization for a Limited Liability Company (LLC) costs $50 online compared to $105 by paper, saving you $55. General business corporations pay a minimum incorporation fee of $58, which consists of $50 for the first $30,000 of authorized shares, a $3 certificate of incorporation fee, and a $5 Technology Trust Fund fee (with an additional $5 for each extra $10,000 of authorized shares). Foreign corporations registered in another state pay $155 for a certificate of authority and submit a certificate of good standing from their home state dated within 60 days. Sole proprietorships and general partnerships do not file creation documents, though any person or entity transacting business under a name other than their true name must file a Fictitious Name Registration (DBA) with the Secretary of State.

Once your entity is formed and you have your FEIN from the IRS, register with the Missouri Department of Revenue if you sell goods or taxable services, hire employees, or owe corporate income tax. You can apply through the DOR Online Business Registration portal or by mailing paper Form 2643 (completing Sections 1 through 32 plus applicable tax sections, including the name, title, title effective date, Social Security number, date of birth, and home address for every owner, officer, partner, or member).

Retail sales tax applications take 10 business days to process, while all other business tax applications take up to 15 calendar days. Once approved, the DOR mails a welcome letter containing your Missouri Tax Identification Number (MOID), a 4-digit PIN for online filing, your account start date, and your filing frequency. If you lose your welcome letter, an owner, officer, partner, member, or authorized representative with Form 2827 (Power of Attorney) on file can request the MOID and PIN by calling 573-751-5860 or emailing businesstaxregister@dor.mo.gov. To add or close locations or update officer details later, file Form 126.

• Step 1: Reserve your business name (optional, $25 for 60 days, up to 180 days total, or $30 for LLPs) or file formation documents directly with the Missouri Secretary of State.
• Step 2: Apply for a Federal Employer Identification Number (FEIN) online via IRS Form SS-4.
• Step 3: Submit your Missouri DOR tax registration online or via Form 2643 at least 10 to 15 days before making retail sales or paying wages.
• Step 4: Register with the Division of Employment Security (DES) via UInteract once you become liable to pay wages to employees.
• Step 5: Apply for required city or county business licenses directly with your local government authority.

• dor.mo.gov: Business Tax Registration FAQs XS SM MD LG Missouri Department of Revenue Menu Toolbar Lin
• sos.mo.gov: Starting a Business

Missouri Income Taxes by Business Structure

How your business pays Missouri income tax depends on its federal tax classification. Missouri does not require every entity to pay tax at the company level.

C Corporations: For tax years 2020 and forward, the Missouri corporate income tax rate is a flat 4 percent (down from 6.25 percent for tax years 2019 and prior). Every corporation defined under Chapter 143, RSMo, must register and file Form MO-1120 if it is required to file a federal income tax return and has $100 or more in gross income from Missouri sources. Every Form MO-1120 must include your MITS/MOID number. Tax-exempt organizations filing Federal Form 990, 990EZ, 990N, or 990PF do not file a Missouri corporate return unless they report unrelated business taxable income on forms such as 990T or 990C (or specialized returns like 1120POL or 1120H), which are computed on Form MO-1120.

S Corporations and LLCs: Every S corporation that files Federal Form 1120S and has either a Missouri resident shareholder or Missouri-source income must register and file Form MO-1120S for informational purposes only. Shareholders pay the actual tax on their individual returns (using voucher Form MO-1040V or paying online). Qualified Subchapter S Subsidiaries (QSSS) are included on a single Form MO-1120S under the parent company's name. Under Section 347.187.2, RSMo, Missouri classifies LLCs consistent with federal income tax purposes: an LLC taxed as a C corporation files Form MO-1120 and pays the 4 percent rate, while a disregarded single-member LLC reports business income on the owner's personal return.

Multi-State Apportionment: If a corporation's taxable income is not 100 percent from Missouri sources and it is taxable in both Missouri and at least one other state, it must attach Form MO-MS to its return (even if Missouri taxable income is zero). For tax years beginning on or after January 1, 2020, corporations use Method Two A (Receipts Factor Apportionment), which apportions income based on the ratio of gross receipts in Missouri to total gross receipts from regular business activity everywhere (excluding hedging transactions and dispositions of cash or securities). Specialized industries use Methods Three through Seven. If you classify any income as nonapportionable, you must also attach a detailed Form MO-NAI.

• dor.mo.gov: FAQs
• dor.mo.gov: Business Tax Registration FAQs XS SM MD LG Missouri Department of Revenue Menu Toolbar Lin

Missouri Sales and Use Tax Requirements

Any person or company with a business location in Missouri that sells or leases tangible personal property or provides a taxable service (such as telephone service, room rentals, fitness clubs, or movie and theater shows) to a final consumer must obtain a Missouri Retail Sales Tax License and remit sales tax on Form 53-1.

You must have your license in hand before making any sales. Under Section 144.118, RSMo, operating without a retail sales tax license carries a penalty of $500 for the first day of operation and $100 for each day thereafter, up to a maximum penalty of $10,000, and is a misdemeanor. Effective August 28, 2018, the DOR no longer requires new businesses to post a cash or surety bond when registering for retail sales or vendor's use tax, unless the business becomes delinquent (prior cash bonds can be refunded using Form 472).

If your business is 100 percent wholesale, you do not need a retail sales tax license and instead provide suppliers with Missouri Form 149 (Sales/Use Tax Exemption Certificate), or collect Form 149 from retailers buying from you for resale. Out-of-state vendors with Missouri nexus selling to final consumers must collect Vendor's Use Tax. When an out-of-state seller does not collect tax, a Missouri business or individual buyer must file a Consumer's Use Tax return if their cumulative untaxed purchases exceed $2,000 in a calendar year.

• dor.mo.gov: Business Tax Registration FAQs XS SM MD LG Missouri Department of Revenue Menu Toolbar Lin
• sos.mo.gov: Starting a Business

Missouri Employer, Payroll, and Federal Taxes

Hiring employees in Missouri triggers state employer withholding tax with the Department of Revenue and state unemployment insurance (UI) tax with the Division of Employment Security, alongside federal IRS filings.

Employer Withholding Tax (DOR): Every employer maintaining an office or transacting business in Missouri and paying wages to a resident or nonresident must obtain a Missouri Employer Tax Identification Number. Transient employers (out-of-state contractors temporarily working in Missouri) must submit a withholding tax liability bond with their registration. Also, Missouri employers with five or more employees must submit applicable federal 1099-MISC forms to the DOR or face fines.

State Unemployment Insurance Tax (DES): Liable employers report covered employee wages quarterly on UInteract, and no part of the tax can be deducted from an employee's pay. According to the Missouri Department of Labor and Industrial Relations, the new employer rate for calendar years 2024 through 2027 is 2.376 percent for regular employers (including mining and construction) and 1.00 percent for 501(c)(3) nonprofits and governmental entities. After two full calendar years of liability, employers generally qualify for an experience rate ranging from 0.0 percent to 6.0 percent (or 0.0 percent to 9.0 percent for Shared Work Program participants). Effective January 1, 2023 (HB 2168), the DES redirects up to 0.020 percent of a rated employer's prior 12-month taxable wages from first-quarter UI contributions to the Unemployment Automation Fund at no extra cost to the employer.

Federal and Self-Employment Taxes (IRS): All businesses except partnerships file an annual federal income tax return (partnerships file informational Form 1065) and make pay-as-you-go estimated tax payments. Sole proprietors, independent contractors, and partners must pay federal self-employment (SE) tax for Social Security and Medicare on Schedule SE (Form 1040 or 1040-SR) if net earnings from self-employment are $400 or more (or $108.28 or more in exempt church wages). Employers also report federal income tax withholding and FICA taxes on Form 941 and FUTA tax on Form 940. Specific industries pay federal excise taxes on Form 720, Form 2290 (for highway trucks and buses weighing 55,000 pounds or more), or Forms 730 and 11-C (for wagering).

• labor.mo.gov: Tax Rates
• labor.mo.gov: Unemployment Insurance Tax

Worked Example: Calculating Your First-Year Payroll Unemployment Tax

By our calculation from the Missouri Department of Labor and Industrial Relations tax rate tables, a regular new Missouri employer's maximum state unemployment tax per employee drops from $237.60 in 2024 to $213.84 in 2026, and down to $201.96 in 2027, because the taxable wage base decreases by $500 each year while the 2.376 percent rate stays flat.

Here is how you calculate your combined state (SUTA) and federal (FUTA) unemployment tax bill for calendar year 2026 if you open a Missouri LLC and hire 3 employees who each earn $35,000 during the year.

• Step 1 (Missouri UI Taxable Wages): In 2026, Missouri's UI taxable wage base is $9,000 per employee. Only the first $9,000 of each worker's gross wages is taxed ($9,000 x 3 employees = $27,000 total state taxable payroll).
• Step 2 (Missouri New Employer UI Tax): Multiply the $9,000 wage cap by the 2026 regular new employer rate of 2.376 percent.
• Step 3 (Federal FUTA Tax): Under the Federal Unemployment Tax Act (Form 940), the federal wage base is the first $7,000 paid to each employee. The statutory 6.0 percent FUTA rate is reduced by a 5.4 percent credit to an effective rate of 0.6 percent for employers who pay state UI tax on time and in full, since Missouri is not a credit reduction state ($7,000 x 0.6% = $42.00 per employee, or $126.00 for all 3 employees).
• Step 4 (Total Combined Unemployment Tax): Adding $641.52 in Missouri UI tax and $126.00 in federal FUTA tax gives a total annual unemployment tax cost of $767.52 for 3 full-time employees in 2026.

• labor.mo.gov: Tax Rates
• labor.mo.gov: Unemployment Insurance Tax

Key Missouri Deadlines, Annual Reports, and Penalties

Corporate Income Tax Due Dates and Penalties: Missouri corporate returns (Form MO-1120) are due on the 19th day of the 4th month following the end of the tax year (April 15 for calendar-year filers). Missouri does not follow federal due date rules for short-period returns, which are also due on the 15th day of the 4th month after the short period ends. If your Missouri due date falls before your federal return is ready, file and pay an estimated Missouri return by the original due date and file an amended Form MO-1120 later. Weekend or holiday due dates shift to the next business day. Failure to file on time incurs additions to tax of 5 percent per month up to 25 percent of the unpaid balance, and failure to pay incurs a 5 percent penalty plus simple interest.

Unemployment and Secretary of State Dates: DES mails annual UI rate determinations between mid-November and the end of December, with a 30-day window to protest in writing or by fax. Voluntary UI payments on UInteract to lower your annual rate are due January 15. With the Secretary of State, Missouri LLCs, general partnerships, and limited partnerships do not file annual reports. General business corporations file a corporate registration report (annually, or biennially in even or odd years matching their incorporation year) due on the last day of the month four months from their renewal month (changing the renewal month costs $25, and filing online saves $25 per year over paper). LLPs and LLLPs renew their registration annually.

Aldro is the cheapest way to get your business taxes done: $399 flat, with bookkeeping at $20 a month. The flat price covers everything tax for the year (every federal and state or provincial business return: Schedule C, 1065, 1120-S, 1120 and state returns, plus T2 and T1 with T2125 in Canada), multi-state returns at the same price, and the owner's personal return when the business income needs it. Extensions and quarterly estimate reminders are included, 1099-NEC, T4/T4A and T5018 slips are included, city and local business returns and state franchise tax reports are included, and we work out quarterly estimates and CRA instalments. Each unfiled prior year is billed at the same flat price. Bookkeeping covers unlimited bank and card accounts, monthly reconciliation and statements, but not payroll processing or sales-tax filing, and if you are switching from Bench or another service, we start within a week of getting the documents.

• sos.mo.gov: Frequently Asked Questions Corporations
• labor.mo.gov: Tax Rates

Buying an Existing Business, Reinstatements, and Net Operating Losses

Buying an Existing Business (Successor Liability): If you purchase an existing Missouri business's building, inventory, equipment, or fixtures, you must withhold enough purchase money to cover unpaid taxes, interest, or penalties owed by all former owners until the seller produces a receipt from the Director of Revenue showing all taxes are paid. Relying on a seller's affidavit will not protect you from personal liability. Before closing, require the seller to provide a sales tax Certificate of No Tax Due (if the seller only collected sales tax, requested via taxclearance@dor.mo.gov) or a full Tax Clearance (requested by the previous owner on Form 943 if they owed multiple tax types).

Administrative Dissolution and Reinstatement: If a Missouri corporation fails to timely file its registration report or maintain a physical registered agent and office in Missouri (PO Boxes alone and retail mailing stores like the UPS Store or Mailboxes, Etc. are not permitted), the Secretary of State may administratively dissolve the entity. To reinstate the business, the corporation must obtain a Tax Clearance letter from the DOR using Form 943 showing no taxes are due and submit it with the SOS reinstatement application.

Net Operating Losses (NOLs) and Depreciation: Missouri does not require bonus depreciation to be added back for property purchased before July 1, 2002, or after June 30, 2003. If your corporation claims a federal NOL deduction and had net positive Missouri addition modifications in the loss year, you must compute a Net Operating Loss Modification on Form MO-5090 for each year the loss is carried back or forward. For 5-year NOL carrybacks under the federal CARES Act, Missouri disallows the loss in carryback years 5, 4, and 3 (requiring an addition modification on amended returns with no refund for those years) and allows recuperation as a subtraction modification on Form MO-1120 in tax years beginning January 1, 2021, and after.

• dor.mo.gov: FAQs
• dor.mo.gov: Business Tax Registration FAQs XS SM MD LG Missouri Department of Revenue Menu Toolbar Lin