A budget bill Gov. Lamont signed May 26, 2026 extends Connecticut's R&D tax credit to all entity types—LLCs, S-corps and partnerships—for tax years starting on or after Jan 1, 2026, previously limited to C corporations. Credits are refundable at 65% for qualified small businesses (90% for biotech), up to $1.5M per taxpayer.
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Connecticut opens its R&D tax credit to pass-through startups, not just C-corps
Why this matters for founders
CT startups organized as pass-throughs can now claim—and get cash back on—R&D credits for in-state research; coordinate with your accountant to apply for DECD credit vouchers on 2026 R&D spend.
Source: CBIZ
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