The Mississippi Pass-Through Entity Election: Trap or Tax Break?

Since 2022, a Mississippi partnership or S corporation can choose to pay the state income tax itself instead of passing it to its owners. The election exists to get around the federal cap on deducting state and local taxes. It also moves the business onto a different rate schedule, and that schedule is higher than the one its owners pay. Whether that trade is worth making is a calculation, not a yes.

Informational only, not tax advice. Rates, forms, and rules on this page were verified against the Mississippi Department of Revenue in September 2026. Confirm them before acting, and run the numbers with a CPA before electing.

Why the election exists

A pass-through entity normally pays no income tax of its own. Its profit flows to the owners, who pay Mississippi income tax on their personal returns and then try to deduct that state tax on their federal return. Federal law caps how much state and local tax an individual can deduct, so for a profitable owner much of the state tax stops being deductible.

If the entity pays the state tax instead, that payment is a business expense. It reduces the profit that flows to the owners before the federal cap ever applies. Mississippi then gives each owner a credit for their share of what the entity paid, so the state is not paid twice. The result, in the years and for the owners where it works, is a lower federal bill with roughly the same state bill.

That last phrase is where Mississippi differs from what most owners expect.

The catch: the entity pays the corporate schedule

The Department of Revenue's instructions for Form 84-100 state the rate plainly: "Income Tax (Composite and Electing Pass-Through Entity): 0% on the first $5,000 of taxable income, 4% on the next $5,000 of taxable income and 5% on all taxable income in excess of $10,000." That is Mississippi's corporate schedule. The individual schedule is different, and lower.

Sources: Form 84-100 instructions, Rev. 01/26 (opens in new tab) (entity rate) and DOR individual tax rates (opens in new tab) (individual rate by year). The individual rate is on a legislated phase-down; the schedule through 2030 is here.

So on income over $10,000 the entity pays 5% where its owners would have paid 4.4% in 2025 or 4.0% in 2026, and the entity also pays 4% on a slice the owners would have had at 0%. The election raises the state tax. The question is only whether the federal deduction it unlocks is worth more than that increase, and the gap between 5% and the individual rate widens every year the phase-down continues.

An illustration, not a rule

Take an S corporation with $110,000 of Mississippi taxable income and one owner, in tax year 2026. The figures below use only the rates above; the federal side is described, not computed, because the federal answer depends on the owner's bracket, whether they itemize, and the cap in force that year.

Illustration only. Ignores the owner's personal deductions and exemptions, other income, and every federal figure. The state cost of electing here is $1,200; the federal saving is whatever deducting $5,200 as a business expense is worth to this owner compared with deducting $4,000 under the personal cap. For some owners that is clearly more than $1,200. For others, including anyone who does not itemize federally or who already sits under the cap, it is nothing, and the election is a pure loss.

Who can elect, and how

• Any partnership, S corporation, or similar pass-through entity, for calendar year 2022 and each year after. Fiduciaries cannot elect.
• Form 84-381, the Pass-Through Entity Election Form, filed with the Department of Revenue on paper or through TAP. It can be filed at any time during the tax year, or by the return due date, or by the date the return is actually filed, whichever is latest.
• Not by filing the return. Checking the box on Form 84-105 without Form 84-381 does not make the election, and a return already filed cannot be amended to add one.
• A vote is required at whatever threshold the entity's governing documents set for official actions. If the documents are silent, owners holding more than 50% of voting control, plus the governing body if there is one.
• Binding until revoked. No annual re-election. Revocation uses the same form and the same vote.

Source: DOR Electing Pass-Through Entity FAQ, March 4, 2024 (opens in new tab).

What happens after the election

• The entity files Form 84-105 with the electing box checked, attaches Form 84-381, and issues each owner a Mississippi K-1 (Form 84-132) showing their share of the tax paid.
• Estimated payments become the entity's job. Once annual income tax liability exceeds $200, the entity must pay at least 90% of it through the year in quarterly estimates. In the first year, estimates the owners already paid personally can be transferred to the entity or refunded, by written request.
• Owners claim the credit on Form 80-161 with the K-1 attached. If the credit is larger than the owner's Mississippi tax, the excess is refunded or carried forward, at the owner's choice.
• Non-resident owners with no other Mississippi income do not have to file a Mississippi non-resident return.
• Credits for taxes paid to other states stay at the owner level; they cannot be taken on the entity return.

When it tends to work, and when it tends not to

Generalizations, offered so you know what to bring to the meeting, not so you can skip it.

• More likely to help: profitable owners who itemize federally, whose state and local taxes already exceed the federal cap, and who expect that to stay true.
• More likely to hurt: owners who take the federal standard deduction, owners with modest income where the 4% slice and the 5% rate simply cost more, and multi-owner entities where the election helps some owners and costs others, because it applies to everyone or no one.
• Gets worse over time if nobody looks: the individual rate is scheduled to fall each year through 2030 while the entity rate stays at 5%. An election that paid in 2025 needs re-checking every year, and the election does not expire on its own.

This is what a CPA is for

The state side of this page is arithmetic. The federal side is a judgment about each owner's return, and the answer can flip from one owner to the next inside the same business. A Mississippi CPA who handles S corporations will run both sides for every owner, model the next few years against the rate schedule, and tell you whether to file Form 84-381 or leave it alone. Tell us what you need and we will email your options, or browse CPAs by city.

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