When does a C corporation make sense? The 21% rate, double taxation, section 1202 stock and foreign owners

A C corporation is a company taxed under Subchapter C: it files Form 1120 and pays corporate income tax, and its shareholders pay tax again on dividends. A corporation formed under state law (Inc. or Corp.) is a C corporation by default. An LLC isn't; it becomes one by filing Form 8832 to be classified as an association taxable as a corporation.

• Forming a corporation: A corporation formed in North Carolina, Delaware or elsewhere is taxed as a C corporation automatically. You only file Form 2553 if you want S status (see yclcpa.com/scorp).
• An LLC electing C treatment: File Form 8832 and choose classification as an association. The effective date can be up to 75 days before filing and no more than 12 months after. The LLC stays an LLC under state law.
• The 60-month rule: Once an entity changes its classification on Form 8832, it generally can't change by election again for 60 months unless the IRS allows it by private letter ruling (for example, when more than 50% of the ownership has changed hands). A newly formed LLC's initial election effective on the date of formation doesn't count.
• Electing S status later: An LLC taxed as a corporation that later files Form 2553 isn't making another Form 8832 change, so the 60-month rule doesn't block it. Converting from C to S has its own costs, such as built-in gains tax, so review it first.
• A late Form 8832: Relief is generally available under Rev. Proc. 2009-41 within 3 years and 75 days of the intended effective date, with reasonable cause.
• Tax consequences of the change: An operating LLC that elects corporate treatment is treated as contributing its assets to a new corporation, which is generally tax-free, though liabilities above asset basis and similar cases need a closer look.

A C corporation pays 21% federal tax on its profit. When after-tax profit is paid out to individual shareholders, they pay qualified dividend tax: in 2026, 0% up to $49,450 of taxable income for a single filer, 15% up to $545,500 and 20% above, plus 3.8% net investment income tax above $200,000 ($250,000 joint). With dividends taxed at 15% to 23.8%, paying everything out costs about 33% to 40% in total, and less if some dividends fall in the 0% bracket. Profit kept in the company is taxed at only 21% for now.

Example (hypothetical numbers, to show the method): A company earns $200,000 of profit. The owner is single with no other income, using 2026 federal brackets and the $16,100 standard deduction. Only federal income tax plus Social Security and Medicare are counted, not state tax. The business isn't a specified service trade or business, so the 20% QBI deduction applies.

Description: Each row is a way of operating, with corporate-level tax, personal-level tax, the total and the share of profit.

Approach	Company level	Personal level	Total	Share of profit
Single-member LLC (sole proprietor)	—	SE tax $28,234 + income tax $25,196	$53,431	26.7%
S corporation, owner paid $90,000 salary	—	Payroll tax $13,770 + income tax $30,132	$43,902	22.0%
C corporation, all after-tax profit paid as dividends	Corporate tax $42,000	Dividend tax $13,868	$55,868	27.9%
C corporation, profit kept for reinvestment	Corporate tax $42,000	None for now	$42,000	21.0%

How the numbers work:

1. Corporate tax: $200,000 × 21% = $42,000, leaving $158,000.
2. Paying it all out: The $158,000 is qualified dividends. After the $16,100 standard deduction, taxable income is $141,900. The first $49,450 is taxed at 0% and the remaining $92,450 at 15%, so the dividend tax is $13,868. Income is under $200,000, so there's no 3.8% tax.
3. Sole proprietor and S corporation: See Figure 3 at yclcpa.com/scorp for that math.

What the example shows:

• If everything is paid out, a C corporation doesn't beat a sole proprietorship, and the gap widens at higher profits and personal rates.
• When profit is reinvested, the C corporation has the lowest current tax. Dividends later are still taxed, and keeping too much can trigger the accumulated earnings tax (below).
• An owner who works in a C corporation generally takes a reasonable salary too. The salary is deductible to the company but subject to payroll tax, so the real result falls between the rows above and depends on your facts.
• North Carolina: The company pays 2% corporate tax, and shareholders pay NC individual tax on dividends (3.99% in 2026).

Section 1202 lets individuals exclude most or all of the capital gain when they sell qualified small business stock (QSBS). For stock issued after July 4, 2025, the One, Big, Beautiful Bill (signed July 4, 2025) allows a 50% exclusion after 3 years, 75% after 4 years and 100% after 5 years; raises the per-company cap from $10,000,000 to $15,000,000 (or 10 times basis); and raises the gross-asset limit from $50,000,000 to $75,000,000.

• C corporations only: The stock must be issued by a domestic C corporation. S corporation shares and LLC interests don't qualify. Stock received when an LLC converts to a C corporation can qualify, with the holding period starting then.
• Original issuance: You must get the stock from the company itself (for cash, property or services), not buy it from another shareholder.
• Gross assets: Before and immediately after the issuance, the company's gross assets (cash plus the tax basis of other assets) can't exceed $75,000,000 ($50,000,000 for stock issued on or before July 4, 2025), indexed for inflation after 2026.
• Active business: At least 80% of assets must be used in a qualified active business. Excluded fields include health, law, engineering, architecture, accounting, actuarial science, performing arts, consulting, athletics, financial and brokerage services; banking, insurance and investing; farming; mining and oil and gas; and hotels and restaurants.
• Who can use it: Individuals, trusts and other noncorporate holders.
• The part that isn't excluded: With a 3- or 4-year partial exclusion, the taxable portion is taxed at a maximum 28% rate.
• Older stock: Stock issued on or before July 4, 2025 stays under the old rules: more than 5 years' holding, 100% exclusion for stock acquired after September 27, 2010, and a $10,000,000 cap.
• North Carolina: NC starts from federal adjusted gross income, and its Internal Revenue Code reference date is now July 5, 2025, so it generally follows the federal exclusion. Confirm the NC rules for the year before you sell.

Description: The left column is stock issued on or before July 4, 2025, the right column is stock issued after, compared item by item.

Item	Issued on or before 2025-07-04	Issued after 2025-07-04
Held 3 years	No exclusion	50% excluded
Held 4 years	No exclusion	75% excluded
Held 5+ years	100% (acquired after 2010-09-27)	100%
Per-company cap	$10,000,000 or 10 times basis	$15,000,000 or 10 times basis (indexed from 2027)
Gross-asset limit	$50,000,000	$75,000,000 (indexed after 2026)

Both are penalty taxes on keeping money inside a C corporation instead of paying dividends, and both are 20%. The accumulated earnings tax hits retained profit beyond the reasonable needs of the business; the personal holding company tax hits closely held companies whose income is mostly passive. An operating business with real growth plans rarely runs into them, but a company that just holds cash and collects interest or rent should watch out.

• Accumulated earnings tax: If a company keeps profit beyond the reasonable needs of the business so shareholders avoid dividend tax, the excess is taxed at 20%. Most companies can accumulate $250,000 without justification; professional service companies in health, law, engineering, accounting, consulting and similar fields get $150,000. Above that, keep written plans for expansion, equipment or working capital.
• Personal holding company tax: A company is a personal holding company if five or fewer individuals own more than 50% of the stock at any time in the second half of the year, and at least 60% of its adjusted ordinary gross income is dividends, interest, royalties, certain rents and personal service contracts performed by major shareholders. Undistributed income of that kind is taxed at 20%, reported on Schedule PH.
• Staying clear: Keep a real business purpose, and records, for money left in the company. If the company is mainly an investment vehicle, consider another structure or regular dividends.

An S corporation can't have foreign shareholders, and a partnership (a multi-member LLC) withholds 37% on a foreign partner's share of business income while the partner files a U.S. return every year. A C corporation files its own return, and foreign shareholders are generally taxed only through withholding on dividends (30%, generally reduced to 10% under the U.S.–China treaty), without filing a U.S. personal return just for owning the stock. A company that's 25% or more foreign-owned files Form 5472 every year.

• S corporation: Nonresident aliens can't be shareholders, so it's ruled out.
• Partnership or multi-member LLC: With U.S. business income, a foreign partner's share is subject to section 1446 withholding (37% for individuals, 21% for corporations), and the partner files Form 1040-NR and possibly state returns (see yclcpa.com/k1).
• A foreign-owned single-member LLC: Disregarded by default, it files a pro forma Form 1120 with Form 5472 every year, and each missed Form 5472 carries a $25,000 penalty (see yclcpa.com/5472).
• C corporation: The company files Form 1120 and pays 21%. Dividends to foreign shareholders are withheld on and reported on Form 1042-S. If foreign owners hold 25% or more, the company also attaches Form 5472 to report transactions with foreign related parties.
• Founders paid by their own company: If you're on H-1B or similar and work for your own C corporation, you're paid W-2 wages through payroll (see yclcpa.com/h1b).

A calendar-year C corporation's Form 1120 is due April 15 (the 15th day of the 4th month), and Form 7004 extends the filing deadline 6 months to October 15, but not the payment. If the year's tax will be $500 or more, the corporation pays estimates in four installments on the 15th day of the 4th, 6th, 9th and 12th months: April 15, June 15, September 15 and December 15 for a calendar year.

• The 2026 return: Due April 15, 2027, or October 15, 2027 with an extension. Companies with a June 30 fiscal year follow a different rule, so check separately.
• Late filing penalty: 5% a month up to 25%. For returns due in 2027 that are more than 60 days late, the minimum is the lesser of $535 or the tax due.
• How much to pay: Generally 100% of this year's tax or 100% of last year's (if last year was a full 12 months and showed tax). A "large corporation" with $1,000,000 of taxable income in any of the three prior years can use last year's tax only for the first installment.
• How to pay: Electronically, for example through EFTPS. Underpayment penalties are figured on Form 2220.
• North Carolina: The CD-405 is also due on the 15th day of the 4th month, with an automatic extension if you check the federal extension box. Corporations expecting $500 or more of NC tax make estimates on Form CD-429.

A North Carolina C corporation pays corporate income tax and franchise tax, both on Form CD-405. The corporate income tax rate is 2% for 2026, and state law schedules 1% from 2028 and 0% after 2029. Franchise tax is based on net worth, with a $200 minimum.

• The phase-down: 2.25% in 2025 and 2% in 2026. The statute lists 1% for years beginning in 2028 and 0% after 2029 but doesn't list 2027 separately; it's generally read as staying at 2%, subject to what NCDOR publishes. Some legislators have proposed restoring a higher rate, and as of October 2026 that hasn't passed.
• Franchise tax: The base is net worth (total assets without reduction for accumulated depreciation, minus liabilities). The first $1,000,000 is taxed at $1.50 per $1,000, capped at $500; the amount above $1,000,000 is taxed at $1.50 per $1,000; the minimum is $200. An LLC taxed as a corporation pays it too.
• Shareholders' NC tax: Dividends are taxed at the NC individual rate: 3.99% in 2026 and 3.49% for 2027–2029 (S.L. 2026-41).
• Business in other states: Register as a foreign corporation there and follow that state's rules (see yclcpa.com/llc).

A C corporation tends to fit when profit will stay in the business to grow, when you plan to raise venture money or sell stock later under section 1202, when you have foreign owners, or when you need more than one class of stock. It tends not to fit when you take all the profit out every year, expect early losses you'd like to use against personal income, hold rental real estate, or run a small service business.

Description: Four common setups compared on who pays tax, self-employment tax, ownership limits, losses, fundraising, foreign owners and who each fits.

Item	Sole proprietor / single-member LLC	Multi-member LLC (partnership)	S corporation	C corporation
Who pays income tax	You (Schedule C)	Partners (K-1)	Shareholders (K-1)	The company at 21%, then shareholders on dividends
SE tax / payroll tax	15.3% on all profit	General partners' business income	Only on reasonable salary	Only on wages
Ownership limits	One owner	None	100, U.S. residents, one class of stock	None
Losses	Offset other personal income (with limits)	Offset, and debt can count toward basis	Offset, but bank loans don't create basis	Stay in the company for future profits
Fundraising, preferred stock	Not suitable	Possible, but investors usually avoid it	Not allowed	Best fit; section 1202 available
Foreign owners	Form 5472 + pro forma 1120 every year	37% withholding on foreign partners	Not allowed	Allowed; Form 5472 at 25% or more
Fits	Early stage, modest profit	Partners in business, real estate	Steady profit, all owners U.S. residents	Reinvestment, fundraising, foreign owners

• Taking all the profit out: Double taxation makes a C corporation costlier than an S corporation or LLC (see Figure 1).
• Early losses: A C corporation's losses stay inside the company and only offset its future profits, not your wages or other personal income.
• Rental real estate: Property in a C corporation means corporate tax first on a sale or distribution; an LLC is usually more flexible (see yclcpa.com/rental).
• Small service businesses: Consulting, design, healthcare and similar businesses can't use section 1202 and face the accumulated earnings tax limits, so a C corporation offers less.

Start with how the profit will be used, who the owners are, and whether you plan to raise money or sell. The common situations are below.

• Situation A: You plan to raise venture money or sell in a few years. Usually form a C corporation from the start (many investors expect Delaware) and keep issuance and asset records with section 1202 in mind.
• Situation B: You're already an LLC and most profit will be reinvested. Model the tax as a C corporation before filing Form 8832, keeping the 60-month rule and later conversion costs in mind.
• Situation C: The owners live in China and want to do business in the U.S. A C corporation is common; at 25% or more foreign ownership, file Form 5472, and dividends are withheld on, generally at 10% under the U.S.–China treaty. A single-member LLC with one foreign owner files a pro forma 1120 and Form 5472.
• Situation D: You're on H-1B or similar and work for your own company. A C corporation or an LLC taxed as one can pay you W-2 wages; in the first year or two after F-1 you're likely still a nonresident, which rules out an S corporation.
• Situation E: Your C corporation is sitting on a lot of cash. Check whether there's a documented business use; if the income is mostly interest, dividends or rent, check for personal holding company status and pay dividends or restructure as needed.