Connecticut

Convert Your Connecticut LLC to S-Corp

Complete 2026 walkthrough for converting a Connecticut LLC to S-Corp taxation — when it makes sense, Form 2553 filing deadlines, reasonable compensation rules, and Connecticut-specific tax implications.

Connecticut S-Corp tax treatment

See state Department of Revenue for S-Corp entity tax

Most states tax S-Corp income only at the member level. Some impose a modest entity-level tax. Check specifics for your state.

When S-Corp Election Makes Sense

Net profit consistently above $80K-$100K per active owner
Stable, predictable income (not wildly fluctuating)
Willing to add ~$2K-$4K/yr compliance cost (payroll + CPA + 1120-S)
Active owners providing services (not passive investors)
Operating in a single state (multi-state payroll adds complexity)
Revenue likely to stay above threshold for 3+ years

Conversion Process: Connecticut LLC → S-Corp

1
Verify eligibility
100 or fewer members, all US citizens/residents or permitted trusts, single class of membership interest, domestic LLC.
2
Run the savings math
Use our S-Corp savings calculator. Below $80K profit, S-Corp election usually costs more than it saves.
3
Determine effective date
Usually Jan 1 of a tax year. New formations can start from formation date if filed within 2m 15d.
4
File Form 2553 with IRS
Must be filed within 2 months and 15 days of effective date (March 15 for calendar-year Jan 1 election). All members sign. Mail or fax to IRS (certified mail recommended).
5
Set up payroll
Register as employer with IRS (Form SS-4 update if needed) + state. Choose Gusto, Rippling, or ADP. Set reasonable salary for each owner-employee.
6
Update Connecticut tax registration
File any Connecticut-specific election forms. Some states (CA, IL) require separate state-level S-Corp elections.
7
Pay reasonable compensation
Run payroll for owner-employees per reasonable compensation rules. Use industry benchmarks + regional adjustment.
8
File Form 1120-S annually
Due March 15 each year. Issue K-1s to all members. File final 1065 for the tax year before S-Corp election if multi-member.

Form 2553 Filing Deadlines

March 15

Standard deadline for calendar-year LLCs wanting Jan 1 effective date

Formation + 2m 15d

For new LLCs wanting S-Corp from formation date

Next tax year + 2m 15d

For LLCs electing S-Corp for a future tax year

Up to 3 years late

Rev. Proc. 2013-30 relief if you acted in good faith

FAQ

When should I convert my Connecticut LLC to an S-Corp?

Typically when net profit consistently exceeds $80K-$100K/yr for single-member LLCs, or $80K per active member for multi-member. S-Corp savings come from avoiding self-employment tax on distributions, but require ~$2,000-$4,000/yr in added compliance (payroll, CPA, 1120-S). Connecticut-specific: Most states tax S-Corp income only at the member level. Some impose a modest entity-level tax. Check specifics for your state.

How do I convert my Connecticut LLC to S-Corp taxation?

File IRS Form 2553 within 2 months and 15 days of the target effective date (usually March 15 for calendar-year LLCs wanting S-Corp status from Jan 1). Late relief available via Rev. Proc. 2013-30 for up to 3 years past intended effective date. The LLC remains a legal LLC — only the federal tax treatment changes.

What's "reasonable compensation" for S-Corp owner-employees in Connecticut?

The IRS requires S-Corp owner-employees to pay themselves a reasonable W-2 salary for services rendered. Rule of thumb: 30-60% of profit for service businesses. Underpaying triggers IRS reclassification, back payroll taxes, and penalties. Use our [Reasonable Compensation Calculator](/tools/reasonable-compensation) for industry benchmarks + regional adjustment.

How does Connecticut state tax treat S-Corps?

See state Department of Revenue for S-Corp entity tax. Federal S-Corp election generally flows to Connecticut tax treatment, but some states impose additional entity-level taxes. Factor this into your S-Corp savings calculation.

What are the downsides of converting my Connecticut LLC to S-Corp?

Added complexity: you must run payroll (typically Gusto, Rippling, or ADP — $40-$100/mo), file Form 1120-S annually (CPA ~$1,500-$3,000/yr), track reasonable compensation, and follow S-Corp distribution rules. Below ~$80K profit, these costs exceed the tax savings.

Can I revert back to default LLC taxation after S-Corp election?

Yes, but with consequences. Revoke the S-Corp election by filing a statement with the IRS. Once revoked, you must wait 5 years before re-electing S-Corp. The revocation is generally effective at tax year-end. Plan carefully — S-Corp revocation can trigger deemed taxable events.

Should you convert? Run the exact numbers.

Our S-Corp savings calculator shows your exact breakeven and year-one savings at your Connecticut profit level. Then use the reasonable compensation tool for audit-proof salary.

S-Corp savings calculator Reasonable comp calculator

When S-Corp Election Makes Sense

Net profit consistently above $80K-$100K per active owner
Stable, predictable income (not wildly fluctuating)
Willing to add ~$2K-$4K/yr compliance cost (payroll + CPA + 1120-S)
Active owners providing services (not passive investors)
Operating in a single state (multi-state payroll adds complexity)
Revenue likely to stay above threshold for 3+ years

Conversion Process: Connecticut LLC → S-Corp

Verify eligibility

100 or fewer members, all US citizens/residents or permitted trusts, single class of membership interest, domestic LLC.

Run the savings math

Use our S-Corp savings calculator. Below $80K profit, S-Corp election usually costs more than it saves.

Determine effective date

Usually Jan 1 of a tax year. New formations can start from formation date if filed within 2m 15d.

File Form 2553 with IRS

Must be filed within 2 months and 15 days of effective date (March 15 for calendar-year Jan 1 election). All members sign. Mail or fax to IRS (certified mail recommended).

Set up payroll

Register as employer with IRS (Form SS-4 update if needed) + state. Choose Gusto, Rippling, or ADP. Set reasonable salary for each owner-employee.

Update Connecticut tax registration

File any Connecticut-specific election forms. Some states (CA, IL) require separate state-level S-Corp elections.

Pay reasonable compensation

Run payroll for owner-employees per reasonable compensation rules. Use industry benchmarks + regional adjustment.

File Form 1120-S annually

Due March 15 each year. Issue K-1s to all members. File final 1065 for the tax year before S-Corp election if multi-member.