The Connecticut Pass-Through Entity (PE) Tax Election: A Strategic Move for New Haven S-Corps, Partnerships, and LLCs

New Haven, Connecticut, Jose’s Tax Service, September 21, 2026

Small Business Tax Tips (New Haven): Daily Morning Edition

For New Haven small business owners, the Connecticut Pass-Through Entity (PE) Tax election should be evaluated as a year-round planning decision. It may apply to S corporations, partnerships, and multi-member limited liability companies (LLCs) taxed as partnerships.

The election is optional. It is made annually. Once made for a tax year, it is irrevocable for that year.

The decision should not be postponed until the tax return is nearly complete. Owners should model the tax, cash-flow requirements, member residency, and expected Connecticut income before the relevant filing deadline.

What the Connecticut PE Tax Does!

Connecticut permits an eligible pass-through entity to pay Connecticut income tax at the entity level. Members then receive a Connecticut personal income tax credit for their allocated share of the tax paid.

This structure may be valuable because the federal state and local tax (SALT) deduction rules have historically limited the individual benefit of state and local income taxes. A properly structured entity-level deduction may produce a different federal result than an individual deduction.

However, the election is not an automatic tax savings strategy. The result depends on the entity’s income, ownership structure, member residency, federal treatment, Connecticut-source income, and payment timing.

For 2026, the key figures are:

• PE Tax rate: 6.99% of the entity’s Connecticut-source income.
• Member credit: 87.5% of the member’s share of PE Tax paid.
• Credit treatment: The credit is refundable to the extent it exceeds the member’s Connecticut income tax liability.
• Election status: Optional and annual.
• Election effect: Irrevocable for the elected year.

Which New Haven Businesses Should Review the Election!

The Connecticut Department of Revenue Services (DRS) defines a pass-through entity as a partnership or an S corporation. This includes several common structures.

Review the election if your business is:

1. An S corporation operating in New Haven or elsewhere in Connecticut.
2. A partnership conducting business in Connecticut.
3. A multi-member LLC taxed as a partnership for federal income tax purposes.
4. An entity with income derived from or connected with Connecticut sources.
5. An out-of-state entity with sufficient Connecticut activity or substantial economic presence.

Connecticut’s substantial economic presence and economic nexus rules may determine whether an entity is considered to be doing business in the state. The analysis can include the frequency, quantity, and systematic nature of the entity’s economic contacts with Connecticut.

Do not rely only on the location of the business mailing address. Review where customers are served, where services are performed, where employees operate, and how revenue is sourced.

The official Connecticut DRS Pass-Through Entity Tax Information page provides the controlling administrative guidance.

How the 87.5% Credit Works!

The credit is calculated from the member’s share of PE Tax paid. It is not a dollar-for-dollar credit equal to 100% of the entity-level tax.

Consider this simplified example:

• Connecticut-source income: $200,000
• 2026 PE Tax rate: 6.99%
• Entity-level PE Tax: $13,980
• Member’s 100% share of the entity: $13,980
• Connecticut credit at 87.5%: $12,232.50
• Difference before considering other tax factors: $1,747.50

This example is simplified. It does not account for apportionment, Connecticut modifications, other income, deductions, estimated payments, or the member’s individual filing position.

The entity type and member residency also affect the credit mechanics. A Connecticut resident, nonresident, part-year resident, trust, estate, or corporate member may not experience the same result. The credit should be allocated and reported using the applicable schedules and member information.

Model the result for each owner. Do not assume that one owner’s outcome applies to every member.

Make the Election Correctly!

The annual election is made through the Connecticut composite return process.

Follow these steps:

1. Complete the applicable federal return first: Federal Form 1065, U.S. Return of Partnership Income, or Federal Form 1120-S, U.S. Income Tax Return for an S Corporation.
2. Prepare Form CT-1065/CT-1120SI, Connecticut Composite Income Tax Return.
3. Check the box electing to file a Connecticut Pass-Through Entity Tax Return.
4. File the form by the original due date or valid extended due date.
5. Complete and file Form CT-PET, Connecticut Pass-Through Entity Tax Return.
6. Report the entity-level tax and member credit information accurately.
7. Retain the supporting workpapers, ownership percentages, Connecticut-source income calculations, and payment confirmations.

Checking the election box on a timely filed Form CT-1065/CT-1120SI constitutes written notice to the Commissioner of Revenue Services.

The election deadline for a calendar-year business is generally:

• March 15, 2027, for the 2026 tax year without an extension.
• September 15, 2027, with a valid extension.

A late election may prevent the business from using the PE Tax treatment for the year. Late filing may also lead to penalties or delay the member credit.

Track the 2026 Planning Window and Payment Schedule!

Businesses that elect the PE Tax must plan for the cash requirement. The entity may need to pay tax before owners receive their individual tax refunds or credits.

If the required annual payment is $1,000 or more, four estimated payments are required. Use Form CT-PET ES, Estimated Connecticut Pass-Through Entity Tax Payment Coupon.

For calendar-year filers, the schedule is:

As of this edition, the third calendar-year 2026 installment was due on September 15, 2026. Review the account immediately if the payment was missed or underpaid.

The final 2026 installment is due January 15, 2027. Use current income projections rather than relying exclusively on last year’s figures.

File and Pay Through the Correct Channels!

Connecticut requires electronic filing and payment for the PE Tax forms. Form CT-PET, Form CT-PET EXT, and Form CT-PET ES must be filed and paid electronically through:

• myconneCT
• The Connecticut Modernized e-File (MeF) program, if supported by the tax software provider

Form CT-PET EXT, Application for Extension of Time to File Connecticut Pass-Through Entity Tax Return, extends the filing time. It does not eliminate the obligation to pay tax when due.

If additional time is needed to pay, review Form CT-1127, Application for Extension of Time for Payment of Income Tax. The extension may help avoid a late-payment penalty if the form is properly filed, the extension is granted, and the tax is paid in full within the extension period.

Keep every electronic confirmation number. Confirm that a financial institution is sending an electronic funds transfer rather than mailing a check through an online banking bill-pay system.

Understand the Penalties Before Filing!

The PE Tax has filing, payment, interest, and electronic payment requirements.

Potential charges include:

• Interest: 1% per month or fraction of a month on unpaid tax.
• Late payment or underpayment penalty: 10% of tax not paid by the original due date.
• Late filing without tax due: A $50 penalty may apply.
• Failure-to-file penalty: If DRS files a return for the entity, the penalty may be 10% of the balance due or $50, whichever is greater.
• Electronic payment penalty: The first offense is generally 10% of the payment, capped at $2,500. The second offense is capped at $10,000. Third and subsequent offenses may be subject to a 10% penalty without the same cap.

An extension to file does not automatically extend the time to pay. File the extension correctly, calculate the payment requirement, and document the transaction.

Use a Year-Round Decision Process!

A responsible PE Tax review should be completed before the return deadline. For 2026 planning, take these actions:

1. Confirm eligibility. Verify the entity classification and Connecticut business activity.
2. Calculate Connecticut-source income. Review apportionment, modifications, and member allocations.
3. Model the entity-level tax. Apply the 6.99% rate to the applicable tax base.
4. Calculate each member’s credit. Apply the 87.5% credit and consider resident or nonresident filing mechanics.
5. Review federal consequences. Confirm the anticipated entity-level deduction and individual SALT implications.
6. Project cash flow. Schedule estimated payments and avoid unexpected tax withdrawals.
7. Review prior payments. Reconcile Forms CT-PET ES, bank confirmations, and accounting records.
8. Document the decision. Keep the model and election analysis with the business tax files.
9. Calendar the deadlines. Record January 15, March 15, and September 15 dates applicable to the entity.

Book a New Haven PE Tax Consultation!

The Connecticut PE Tax election may improve the overall tax position for some New Haven S corporations, partnerships, and multi-member LLCs. It may be less beneficial for other businesses because of ownership, residency, income sourcing, cash-flow, or compliance factors.

Jose’s Tax Service can model the 2026 election, review estimated payments, evaluate member credit mechanics, and coordinate the required forms. Book a consultation with Jose’s Tax Service for PE Tax modeling with $0 upfront payment, virtual or in-person appointments, and year-round tax planning support.

Start with the Jose’s Tax Service booking form. File accurately. Pay electronically. Calendar the next deadline before the current one passes.

For official forms and current instructions, review the Connecticut DRS Pass-Through Entity Tax Forms page.

Category: Tax Planning | Tags: small business tax, New Haven business, deductions, tax strategy