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Idaho Pass-Through Entity Tax: The Affected Business Entity (ABE) Election Explained

Idaho Pass-Through Entity Tax: The Affected Business Entity (ABE) Election Explained

If your LLC is taxed as a partnership or your corporation is taxed as an S corporation, you have a choice that many Idaho owners never hear about. You can leave Idaho income tax with the owners, who pay it on their personal returns, or you can have the business pay it at the entity level. Idaho calls the second option the affected business entity (ABE) election. You will also see it searched as the Idaho pass-through entity tax, the Idaho PTE tax, or the Idaho PTE election. The label differs, but the mechanism is the same: the entity pays, and the owners receive a credit.

This guide explains how the Idaho ABE election works, who can make it, how it is elected each year, what it costs and saves in practice, and what to confirm before you file. This is informational content, not legal or tax advice. Whether the election fits your business depends on your ownership, your income, and your owners' residency. Talk with a qualified CPA before you make the election, and with an attorney if your ownership or entity structure is complex.

What the Idaho ABE election does

Under Idaho Code 63-3026B, a partnership, including an LLC taxed as a partnership, or an S corporation may elect to be an affected business entity. Once the election is made, the entity pays Idaho tax itself at the corporate income tax rate, which is 5.3% of Idaho taxable income for 2025 and later years as published by the Idaho State Tax Commission. Each owner then receives a credit for their share of that tax on their own Idaho return.

In practice, the Idaho affected business entity tax moves the Idaho bill from the owners to the business for that year. The owners still report their share of income, but they use the credit instead of paying the individual rate on that income. For some owners this is a simpler outcome. For others, the timing, the deductions they lose, or the nonresident rules change the math, which is why the decision needs numbers, not a rule of thumb.

Who can make the election

Two entity types qualify under the statute:

  • Partnerships, including an LLC that is taxed as a partnership for federal purposes.
  • S corporations.

Two entity types do not use this election. An LLC or corporation taxed as a C corporation pays the 5.3% business income tax directly, plus the $10 permanent building fund tax. An LLC that files a partnership or S corporation return also owes the $10 permanent building fund tax, so the $10 does not go away with the ABE election. If you are unsure how your LLC is classified for federal tax, confirm it with your CPA before you assume you qualify.

How you make the election each year

The election is made every year. You make it by checking the ABE box on the entity's Idaho return. Nothing is carried forward automatically, so a choice that worked last year must be made again for the current year.

An election can also be made on an amended return, but only in a narrow window. An amended-return election counts only if the amended return is filed before the original due date of the return. Idaho Code 63-3026B was amended in 2026 (ch. 81) on this point, so confirm the current statute text or ask your CPA before relying on an amended-return election.

Keep a copy of your completed election with your permanent business records. Do not mail the election separately. Your records should show the election was made on the timely filed return, because that is the record you will need if the Idaho State Tax Commission asks about it later.

Deadlines and payment rules

The entity must pay the tax by the original due date of the return. For calendar-year filers, that date is April 15. Plan the payment for that date.

If your entity is a first-time Idaho filer, it must pay 80% of the tax by the original due date to get an extension of time to file. Plan for this before April 15, not on the day you file. If you expect a large Idaho tax bill from the entity, a cash-flow check now prevents a penalty and a missed extension later.

The tradeoffs to model before you elect

The Idaho ABE election is not automatically better for everyone. Three points deserve attention before you decide:

  1. The Idaho capital gains deduction. The entity cannot claim the Idaho capital gains deduction. That deduction stays with the owners. If your business regularly produces capital gains, run the numbers with your CPA to see how the election changes what your owners can claim.
  2. Owner credits instead of owner payments. Owners receive a credit for their share of the entity-level tax. The credit reduces their Idaho bill, but it is not the same as deciding who pays the cash. Model the cash flow at the entity level and at the owner level separately.
  3. Nonresident owners. The election is most often considered because of nonresident owners. The next section explains the alternative rules that apply when you do not make the election.

What happens if you do not make the election

Without the ABE election, nonresident individual owners with at least $1,000 of Idaho distributable income must be handled through one of three routes:

  • Filing Form PTE-NROA.
  • Composite filing on behalf of the nonresident owners.
  • Withholding at the top individual rate on Form PTE-01. For 2025, Idaho's individual rate is a flat 5.3%, so the top individual rate and the flat rate are the same figure for that year.

This is where many owners get surprised. A partnership with a few out-of-state owners can have a filing obligation even if the business is small and the owners are not Idaho residents. If your owners live outside Idaho, check whether any of them has $1,000 or more of Idaho distributable income before you choose a path, because that threshold changes what the entity must do.

Federal treatment and the SALT cap

Federal Notice 2020-75 treats the Idaho ABE tax as deductible by the entity. That treatment matters because it affects how the Idaho tax interacts with the entity's federal return. It does not automatically mean the owners get the same federal benefit, because owners who itemize face the federal state and local tax (SALT) cap.

Ask a CPA how the federal SALT cap applies to your owners before you elect. The answer depends on each owner's federal situation, and this guide does not give a federal dollar limit or a federal analysis for your specific case.

Set up the entity correctly first

The ABE election only works if the entity is properly registered and current with the state. Several basics apply to any Idaho business:

  • Certificate of Organization (LLC). The filing fee is $100 online through the Idaho Secretary of State's SOSBiz portal and $120 on paper. Expedited options exist. A $40 surcharge gets evidence of filing within 8 working hours, and a $100 surcharge gets same-day service on filings submitted before 1:00 p.m. Mountain time. Standard processing is about 7 to 10 days, and current estimates appear on the SOSBiz Processed Through Date page.
  • Annual report. Every LLC and corporation must file an annual report every year, starting one year after formation. The report is due before the end of the month in which the certificate or articles became effective. The state lists the annual report fee as no fee.
  • Assumed business name (the Idaho DBA). If you operate under a name other than your registered legal name, file a Certificate of Assumed Business Name with the Idaho Secretary of State, not the county. It costs $25 online or $45 on paper, which includes a $20 manual data entry surcharge. An assumed business name stays active until canceled and is not subject to renewal.
  • Registered agent. Your entity must maintain a registered agent with a physical Idaho street address. P.O. boxes are not accepted.

Licenses: what Idaho does and does not require

Idaho does not have a state general business license. Registering your entity is a registration, not a license. Counties do not issue a general business license either.

Cities are the variable. Some cities require a general business license or permit. Others license only specific activities, such as food service or certain trades. Confirm with your city clerk, because the answer depends on the city where you operate, not on the state. The Business Wizard at business.idaho.gov generates a checklist of the agencies and permits a specific activity needs.

Contractors are handled differently. Idaho has no statewide general contractor license. Contractors register with the Idaho Contractors Board, which sits within the Idaho Division of Occupational and Professional Licenses (DOPL). If your business involves construction, confirm the registration requirement for your trade before you start work.

A practical sequence for owners

  1. Confirm the tax classification. The ABE election applies only to partnerships, including LLCs taxed as partnerships, and S corporations.
  2. Identify every owner's residency. Note which owners are nonresidents and whether any has $1,000 or more of Idaho distributable income.
  3. Estimate the entity-level tax and the owner credits. Compare the cash the entity must pay with what owners would pay on their own returns.
  4. Check the capital gains exposure. If the entity expects capital gains, confirm how the Idaho capital gains deduction would apply to each owner.
  5. Calendar the April 15 deadline. If this is your first Idaho filing, plan for the 80% payment rule.
  6. Check the ABE box on the timely filed return, and keep a copy of the completed election with your records.
  7. Ask a CPA about the federal SALT cap and how the deduction treatment under Notice 2020-75 applies to your owners.

Official Idaho resources

Bottom line

The Idaho ABE election lets a partnership or S corporation pay Idaho tax at the entity level at the 5.3% corporate rate, with owners receiving a credit for their share. It is a yearly choice, it must be made on a timely filed return, and it has real tradeoffs around capital gains and nonresident owners. Get the entity registered and current, confirm your owners' residency, and model both paths before April 15. Because this guide is informational and not legal or tax advice, have a CPA review the election and an attorney review any complex ownership structure before you file.

Keep exploring: related Idaho guides