#c-corp
C Corp
C Corporation accounting, taxation, and financial management
IRS Business Tax Account Revalidation: Why Your S-Corp or C-Corp Access Expires Every Year
The IRS requires S-corp and C-corp Designated Officials to revalidate Business Tax Account access every June 15 through July 29 or lose online access to payments, transcripts, and notices until they reapply from scratch.
Why Your SaaS Can Owe State Tax on Sales You Never "Made" Anywhere: The Throwback and Throwout Trap
A throwback rule can push a home-state sales factor from 20% to 60% on the same revenue by adding untaxed 'nowhere' sales back to the numerator; throwout, which shrinks the denominator instead, takes it to 33%. About 20 states plus D.C. still throw back tangible sales, five repealed their rules since 2019, and P.L. 86-272 protects none of your SaaS receipts.
New Jersey Caps the NOL Deduction at $1 Million: What Corporations Need to Know for 2026–2030
New Jersey's A5322 caps corporate net operating loss deductions at $1 million per year for privilege periods ending July 31, 2026 through July 31, 2030, with public utilities exempt, a six-year carryforward extension for disallowed losses, an estimated-tax penalty safe harbor, and an 80%-to-75% limitation phase-down through 2032.
LLC vs. S-Corp vs. C-Corp: How to Choose (and Later Change) Your Business Structure
An LLC pays 15.3% self-employment tax on all profit; an S-Corp election (Form 2553) splits income into salary and distributions, typically saving $7,000+ once net profit clears $40,000–$60,000. Here's how all three structures compare — and how to switch later.
Colorado HB26-1289: Worldwide Combined Reporting Becomes the C Corp Default in 2027
Starting with tax years beginning January 1, 2027, Colorado's HB26-1289 makes worldwide combined reporting the default for unitary C corporation groups — foreign subsidiaries included. The water's-edge election that avoids it binds for ten consecutive years, and a tax-haven blacklist (Hong Kong, Ireland, the Netherlands, Singapore) pulls listed entities back in regardless. Here's who is affected and what records you need.
Cash vs. Accrual Accounting: How to Choose the Right Method (and When the IRS Forces Your Hand)
Cash accounting records revenue when money is received and expenses when paid; accrual accounting records revenue when earned and expenses when incurred. IRS Section 448 mandates the accrual method once a business's three-year average gross receipts exceed the $32 million threshold for 2026, and changing methods later requires Form 3115 plus a Section 481(a) adjustment.
The Section 1375 Sting Tax: How Former C Corps Pay 21% on Passive Income and Lose Their S Election After Three Years
Section 1375 imposes a flat 21% sting tax on S corporations that carry C-corp earnings and profits when passive investment income exceeds 25% of gross receipts, and three consecutive years over that threshold terminates the S election automatically. This guide walks through the excess net passive income formula, the three-year cliff under Section 1362(d)(3), and three planning moves to defuse exposure before year-end.
Section 302 Stock Redemption: How Closely-Held C Corporations Avoid Surprise Dividend Treatment
Section 302 of the Internal Revenue Code decides whether a closely-held C corporation's stock redemption is taxed as a capital sale or a full-amount dividend. This guide explains the three Section 302(b) tests, the Section 318 attribution traps that ensnare family-owned companies, the 10-year family-attribution waiver, and the partial-liquidation safe harbor under Section 302(b)(4).
Section 382: Why Acquirers Lose a Target's Net Operating Losses
Section 382 caps how fast an acquirer can use a target's net operating losses after an ownership change — annual limit equals the loss corporation's equity value times the long-term tax-exempt rate (about 3.58% in early 2026). Here is what triggers it and the legitimate workarounds.
Personal Holding Company Tax Under Section 541: The 20% Surtax That Quietly Ambushes Closely-Held C Corporations
Section 541 layers a 20% federal surtax on closely-held C corporations that fail both the stock ownership and 60% passive income tests. This guide walks through Schedule PH mechanics, the dividends-paid deduction, and four ways — cash, throwback, consent, and deficiency dividends — to zero out the tax before it hits.
Section 382 NOL Limitation After Ownership Change: How Venture-Backed Startups Preserve Net Operating Loss Carryforwards Through Equity Rounds
Section 382 caps a startup's pre-ownership-change net operating loss deductions at the pre-change fair market value multiplied by the long-term tax-exempt rate (about 3.56 percent in February 2026), triggered when 5 percent shareholders collectively gain more than 50 percentage points over a rolling three-year testing period.
Corporate Alternative Minimum Tax (CAMT): How the 15% Book-Income Levy on $1B+ Companies Actually Works
The Corporate Alternative Minimum Tax imposes a 15% levy on Adjusted Financial Statement Income for corporations averaging over $1 billion in AFSI. A practical guide to who qualifies, how AFSI is computed under section 56A, the FPMG $100M U.S. test, Form 4626 mechanics, and the interim simplified safe harbor.