CT-UISR: Urban and Industrial Site Reinvestment Credit (2025)
Connecticut · Connecticut DRS · Used for tax years 2025
Form CT-UISR is used to claim Connecticut’s Urban and Industrial Site Reinvestment Tax Credit. It reports the eligible projects, the credit allowed for 2025, credits applied to 2025 taxes, and unused credits carried forward to 2026.
Who files this form
Use Form CT-UISR to claim the Urban and Industrial Site Reinvestment Tax Credit as an investor or an assignee for investments in:
- Eligible industrial site investment projects.
- Eligible urban reinvestment projects.
- An eligible project that preserves a historic facility and redevelops it for mixed uses, including at least four housing units, with an investment having a total asset value of at least $2 million.
To qualify, a written application must have been submitted to and approved by the Commissioner of the Department of Economic and Community Development (DECD).
This form must be used to claim the credit against any combination of the listed taxes: Insurance Premiums, Health Care Centers, Corporation Business, Unrelated Business Income, Air Carriers, Railroad Companies, Community Antenna Television Systems and One-Way Satellite Transmission Businesses, Utility Companies, or Surplus Lines Brokers taxes.
What you'll need
Have the following information ready:
- The eligible taxpayer’s name, Connecticut Tax Registration Number, and income-year beginning and ending dates.
- The names of the eligible projects in which investments were made.
- The amount of credit allowed for the 2025 income year and the tax or taxes against which it is being claimed.
- If claiming as an assignee, the assignor’s name and Connecticut taxpayer identification number, if available. Attach an explanation.
- If claiming carryforwards, the applicable 2020 through 2024 Forms CT-UISR, Part I, Line 4 amounts, plus the amounts of credit previously applied and applied to 2025.
Eligibility requires a written application approved by the Commissioner of DECD. Applications and registration information are available by contacting DECD.
How to file
Complete the 2025 Form CT-UISR in blue or black ink. Do not use staples.
- Enter the taxpayer and income-year information, identify the projects, and check whether the claimant is an investor or assignee.
- Select the tax or taxes against which the credit is being applied.
- On Part I, Line 4, enter only the credit allowed for the 2025 income year. Also enter that amount on Form CT-1120K, Part I-C, Column B and/or Form CT-207K, Part 1C, Column B.
- On Part I, Line 5, enter the portion of Line 4 claimed on Form SL-9.
- Complete Part II to calculate credit applied to 2025 and carryforward to 2026. Line 7 totals Lines 1 through 6, Column D. Line 8 totals Lines 2 through 6, Column E.
The supplied form does not state a mailing address or an e-file method.
Common mistakes
- Using the wrong year’s form. Each form is year specific, and the correct year’s form must be used.
- Including prior-year credits on Part I, Line 4. This line is only for credit allowed for 2025. Use Part II for prior-year credit carryforwards.
- Leaving out the assignee explanation. If claiming as an assignee, enter the assignor’s information as requested and attach an explanation.
- Using other ink colors or staples. Use blue or black ink only, and do not use staples.
- Omitting credits shared within a combined group. Members included in the 2025 Form CT-1120CU must include in Part II, Column D credits shared to and used by another group member.
Questions people ask
Who administers this credit?
DECD administers the credit. A written application must have been submitted to and approved by its Commissioner to qualify.
Can the credit be assigned to another taxpayer?
Yes. A taxpayer allowed the credit may assign all or part of it. The assignee may claim it only for a taxable year in which the assignor would have been eligible to claim it. The assignee cannot assign it again.
Can unused credit be carried forward?
Yes. Unused credit may be carried forward for the five immediately succeeding income years until the full credit has been applied.
How is the credit spread over time?
The credit is allowable over ten years, based on these percentages of approved investments:
- Investment year and the next two income years: 0%.
- Third full income year after the investment year and the next three income years: 10% per year.
- Seventh full income year after the investment year and the next two income years: 20% per year.
The form also states that the credit contains a recapture provision.