Navigating the 2026 TCJA Sunset: Pass-Through vs. C-Corporation Structures
The Tax Cuts and Jobs Act (TCJA) of 2017 dramatically restructured the American business tax landscape. However, while the 21% flat corporate income tax rate was made permanent, the vast majority of individual tax benefits, including the 20% Qualified Business Income (QBI) deduction under Section 199A, were enacted with a hard statutory expiration date of December 31, 2025.
What Happens on January 1, 2026?
Unless Congress intervenes, pass-through entities (S-Corporations, Partnerships, LLCs, and Sole Proprietor businesses) will face a compound federal tax increase:
- Expiration of the QBI Deduction: The 20% deduction for qualified business profits immediately sunsets. This forces 100% of your business net income to be taxed at individual rates.
- Reverted Individual Tax Brackets: Individual brackets revert to pre-2018 levels. The top marginal bracket increases from 37% to 39.6%, and other intermediate tax rates shift upward (e.g., 22% becomes 25%, 24% becomes 28%, and 32% becomes 33%).
Evaluating the C-Corporation Alternative
Because the 21% C-Corp rate is permanent, converting your business structure prior to 2026 may be a viable way to minimize tax exposure. Under a C-Corp framework, profits are subject to double-taxation (21% corporate income tax, followed by qualified dividend tax rates of up to 20% plus the 3.8% Net Investment Income Tax upon distribution).
However, for businesses that retain a high proportion of their earnings inside the business for capital reinvestment or expansion (rather than distributing everything as dividends), the C-Corp structure can provide significant savings.
Strategic Factors to Discuss with Your CPA
Beyond simple mathematical calculations, several crucial regulatory elements can influence your final decision:
- State-Level Taxes: Some states tax C-Corporations differently than pass-through owners, or offer specialized Pass-Through Entity (PTE) tax credits that change the net math.
- Qualified Small Business Stock (Section 1202): C-Corp structures may qualify for a 100% capital gains exclusion upon exit if held for more than 5 years under certain criteria.
- Fringe Benefits: C-Corporations have highly favorable policies regarding deduction of health insurance premiums and other fringe benefits compared to pass-through entities.