Mississippi Department of Revenue: Taxes, Fees, and Compliance

The Mississippi Department of Revenue (MDOR) administers the state's tax code, business licensing requirements, and fee collection systems under authority granted by the Mississippi Legislature. This page covers the department's structural mandate, the principal tax types it enforces, common compliance scenarios, and the boundaries distinguishing state-administered obligations from federal and local ones. Businesses, individual filers, and professional practitioners engaged in Mississippi commerce reference these frameworks to determine registration, reporting, and payment obligations.

Definition and scope

The Mississippi Department of Revenue is the executive agency responsible for administering and enforcing Mississippi's revenue laws. Its statutory authority derives from Mississippi Code Annotated § 27-3-1 and subsequent subchapters governing individual tax types. The department operates under the Mississippi Executive Branch and is accountable to the Governor's office and the Legislature for revenue collection performance.

MDOR's administrative scope covers:

1. Sales and Use Tax — Mississippi imposes a general sales tax rate of 7% (Mississippi Code Ann. § 27-65-17), among the highest flat rates in the United States. Use tax at the same rate applies to goods purchased outside Mississippi but used within the state.
2. Individual Income Tax — Administered under Mississippi Code Ann. § 27-7-1 et seq. As of the 2024 tax year, Mississippi enacted a flat rate schedule phasing toward 4% by 2026 (Mississippi House Bill 531, 2022 session).
3. Corporate Income and Franchise Tax — Corporations operating in Mississippi file under a corporate income rate of 5% on taxable income exceeding $10,000, plus a franchise tax levied on the value of capital employed in-state.
4. Withholding Tax — Employers remit employee income tax withholdings on schedules determined by payroll size; semi-monthly remittance is required for employers withholding more than $300 per month.
5. Tobacco and Alcohol Excise Taxes — Specific excise rates apply to cigarettes ($0.68 per pack), other tobacco products, and alcoholic beverages by volume and type.
6. Motor Fuels Tax — Collected at the distributor level; the motor fuel tax on gasoline is $0.18 per gallon (Mississippi Code Ann. § 27-55-11).
7. Gaming Tax — MDOR coordinates with the Mississippi Gaming Commission on privilege tax revenues from licensed casino operations.

The broader Mississippi government structure allocates revenue policy authority across multiple agencies, but MDOR holds primary jurisdiction over collection, audit, and enforcement.

Scope limitations: MDOR's authority is confined to taxes levied under Mississippi state statute. Federal income taxes, FICA contributions, and federal excise taxes are administered by the Internal Revenue Service, not MDOR. Property taxes are administered at the county level by county tax assessors and collectors — those obligations are not within MDOR's direct enforcement scope. Municipal sales tax additions (where authorized) flow through MDOR as a collection agent but are remitted to the respective municipalities.

How it works

Entities with Mississippi nexus — defined as a physical presence, employee presence, or, following the U.S. Supreme Court's 2018 ruling in South Dakota v. Wayfair, sufficient economic activity — must register with MDOR before commencing taxable activity. Registration is completed through the Mississippi Taxpayer Access Point (TAP), the department's online portal.

After registration, the compliance cycle operates as follows:

1. Filing frequency assignment — MDOR assigns sales tax filing frequency (monthly, quarterly, or annual) based on expected tax liability. Monthly filing applies to sellers with annual liability exceeding $600.
2. Return submission — Returns are submitted electronically through TAP for most business taxpayers. Paper filing remains available but is discouraged and does not extend deadlines.
3. Payment remittance — Payment accompanies the return on or before the due date. Sales tax returns are due on the 20th of the month following the reporting period.
4. Audit selection — MDOR's Audit Division selects returns for examination based on risk scoring, industry norms, and third-party data matches. The standard statute of limitations for assessment is 3 years from the return due date; fraud extends this to 6 years.
5. Collections and enforcement — Delinquent accounts accrue interest at 1% per month and a 10% failure-to-pay penalty under Mississippi Code Ann. § 27-65-39. MDOR may issue tax liens, levy bank accounts, and revoke business permits for sustained non-compliance.

Common scenarios

Scenario A — Out-of-state retailer with economic nexus: A retailer headquartered in Tennessee selling $250,000 in goods to Mississippi customers annually meets the economic nexus threshold established by Mississippi's adoption of the Wayfair standard. That retailer must register, collect 7% sales tax on applicable transactions, and remit monthly.

Scenario B — Newly formed LLC: A Mississippi-organized limited liability company begins operations in DeSoto County. It must register with the Mississippi Secretary of State (see Mississippi Secretary of State), then separately register with MDOR for sales tax, income tax withholding, and any applicable excise permits before the first day of business.

Scenario C — Contractor providing taxable services: Unlike many states, Mississippi taxes a defined category of construction services and repairs. A residential contractor performing taxable repairs must collect and remit sales tax on gross receipts from those services, distinct from the contractor's income tax obligations.

Scenario D — Agricultural exemption: Qualifying farmers may claim exemption from sales tax on farm equipment and certain inputs under Mississippi Code Ann. § 27-65-101. This exemption requires documentation maintained at the point of sale and is subject to audit verification.

Decision boundaries

The distinction between sales tax and use tax represents the most operationally consequential boundary in Mississippi tax compliance. Sales tax is collected by the seller from the buyer at point of transaction; use tax is self-reported and remitted by the buyer when a seller did not collect. These taxes are mutually exclusive — the same transaction is never subject to both.

The boundary between MDOR jurisdiction and county tax administration is equally critical. Real property valuations, ad valorem assessments, and property tax collections are functions of county government. MDOR provides oversight and equalization guidance but does not directly administer property tax bills. Disputes over property assessments are directed to county boards of supervisors or the county Board of Equalization, not to MDOR.

For income tax purposes, Mississippi conforms selectively to the Internal Revenue Code but does not adopt all federal provisions automatically. Differences in depreciation schedules, deduction limits, and treatment of certain pass-through income mean that a Mississippi return may diverge materially from the corresponding federal return even with identical underlying transactions.

Entities operating in Mississippi that are also registered in multiple states must apply Mississippi's apportionment formula — currently a single-sales-factor formula under Mississippi Code Ann. § 27-7-23 — to determine the share of multi-state income subject to Mississippi corporate income tax.

References

• Mississippi Department of Revenue — Official Site
• Mississippi Code Annotated, Title 27 (Taxation and Finance)
• Mississippi Code Ann. § 27-65 (Sales Tax)
• Mississippi Code Ann. § 27-7 (Income Tax)
• Mississippi Code Ann. § 27-55 (Motor Fuels Tax)
• Mississippi House Bill 531 (2022) — Income Tax Flat Rate Phase-In
• Mississippi Taxpayer Access Point (TAP)
• Mississippi Gaming Commission
• South Dakota v. Wayfair, 585 U.S. 162 (2018) — Economic Nexus Standard