Connecticut corporate tax is 7.5%. Does not conform to federal bonus depreciation.
Key Planning Insight:
Connecticut has a mandatory PTET for pass-through entities with CT-source income — it is not optional. This is a significant planning point. The state also has a pass-through entity tax credit system.
Connecticut-Specific Tax Strategies
These strategies are especially powerful or unique in Connecticut. Click any strategy to learn more.
Connecticut was one of the first states to enact a PTET. The mandatory entity-level tax on pass-through income provides a corresponding credit to owners, effectively making state taxes fully deductible at the federal level.
Connecticut offers a 25% tax credit for investments in qualified Connecticut small businesses. The maximum credit is $250,000 per investor per year. This is one of the most generous angel investor incentives in the country — effectively reducing your cost basis on startup investments by 25%.
Section 179 allows businesses to deduct the full purchase price of qualifying equipment, vehicles, and software in the year of purchase rather than depreciating over time. The 2026 federal limit is over $1 million. Some states cap or limit Section 179 conformity — check your state rules.
A SEP-IRA allows self-employed individuals and small business owners to contribute up to 25% of net self-employment income (max ~$69,000 for 2026) as a tax-deductible retirement contribution. This is one of the simplest and most powerful ways to reduce taxable income while building retirement savings.
A Donor-Advised Fund (DAF) allows you to make a large charitable contribution in a single tax year (getting the full deduction immediately) and then distribute grants to charities over time. This is especially powerful in high-income years — you "bunch" multiple years of giving into one year to exceed the standard deduction threshold.
Choosing the right business structure is the single biggest tax decision you'll make. Here's what Connecticut LLC and S-Corp owners need to know.
Connecticut LLC Formation
Connecticut LLCs are taxed as pass-through entities by default. All profits flow to your personal return and are taxed at 6.99%. Electing S-Corp status can significantly reduce your self-employment tax burden.
LLC vs. S-Corp in Connecticut
Connecticut offers a Pass-Through Entity Tax (PTET) election — a major advantage for LLC and S-Corp owners. By paying state income tax at the entity level, you bypass the $10,000 federal SALT deduction cap and deduct the full state tax bill on your federal return.
Top LLC Write-Offs in Connecticut
Connecticut LLC owners can deduct: business expenses (IRC §162), home office (IRC §280A), vehicle mileage (IRC §179), Section 179 equipment expensing, retirement contributions (Solo 401k or SEP-IRA), health insurance premiums, and business meals. Note: Connecticut does not conform to federal bonus depreciation — an add-back on your state return may be required.
Connecticut Business Tax Note
Connecticut corporate tax is 7.5%. Does not conform to federal bonus depreciation.
These federal strategies apply to Connecticut residents and business owners. Click any strategy to see full details, savings estimates, and eligibility requirements.
Common questions about Connecticut LLC taxes, S-Corp elections, and business write-offs — answered by Uncle Kam's tax advisors.
Connecticut's top marginal income tax rate is 6.99%. Business owners and self-employed individuals pay this rate on their net business income. Strategies like the S-Corp election, pass-through entity tax (PTET) election, and maximizing deductions can significantly reduce your effective Connecticut tax rate.
The most powerful write-offs for Connecticut LLC owners include: the S-Corp election to reduce self-employment taxes, Section 179 and bonus depreciation for equipment and real estate, the home office deduction, vehicle and mileage deductions, Solo 401(k) or SEP-IRA contributions, and business meals and travel. Connecticut-specific strategies like the PTET election and state-specific credits can add further savings.
Yes. Connecticut offers a pass-through entity tax election that allows S-Corps and partnerships to pay state income tax at the entity level. This is a powerful SALT workaround that lets business owners deduct state taxes on their federal return, bypassing the $10,000 SALT cap. Uncle Kam's tax advisors can help you determine if the Connecticut PTET election is right for your business.
Connecticut does not fully conform to federal bonus depreciation rules. You may need to add back bonus depreciation on your Connecticut state return and depreciate assets over a longer schedule. However, Section 179 expensing may still be available up to Connecticut's state cap. A tax advisor can help you navigate this.
For most Connecticut business owners earning over $60,000 in net profit, electing S-Corp status can save $5,000–$20,000 per year in self-employment taxes. The right choice depends on your income level, Connecticut's franchise or minimum tax requirements, and your business structure. Uncle Kam's advisors specialize in Connecticut entity structuring — book a free call to get a personalized recommendation.
Self-employed individuals in Connecticut can reduce state taxes by: maximizing business deductions (home office, vehicle, equipment), contributing to a Solo 401(k) or SEP-IRA, electing S-Corp status to reduce self-employment tax, using the PTET election if available, and timing income and deductions strategically. A Connecticut-based tax strategy session with Uncle Kam can identify your biggest opportunities.
Real estate investors in Connecticut benefit most from cost segregation studies (accelerating depreciation on commercial and rental properties), the 1031 exchange (deferring capital gains on property sales), bonus depreciation (if Connecticut conforms), the short-term rental loophole, and real estate professional status (REPS). Connecticut's specific tax rules can significantly impact your real estate ROI — get a free strategy review from Uncle Kam.
