"Double taxation" is the reason people tell you not to form a C corporation. The phrase is accurate, but it usually gets used without the rule behind it, so people either overreact or ignore it. The rule sits in two separate sections of the tax code. One taxes the company. The other taxes the shareholder. They apply one after the other, on the same dollar of profit.
The two layers apply the same way to every shareholder. What changes between a U.S. person and a non-resident is how the second layer gets collected.
What the law actually asks for
The first layer is IRC §11. It puts a flat 21% tax on a C corporation's taxable income. This happens every year the company has profit, whether or not it pays out a single dollar to shareholders.
The second layer applies only when the company distributes money to its shareholders. Two sections work together here.
IRC §316(a) defines a "dividend." It is a distribution of property that a corporation makes to its shareholders out of earnings and profits, either from the current year or accumulated since 28 February 1913. If the company has that kind of profit sitting behind the payment, the payment counts as a dividend.
IRC §301(c) then tells you what to do with a distribution. It splits into three pieces:
- The part that is a dividend under §316 gets included in the shareholder's gross income. This is the second tax.
- The part that is not a dividend reduces the shareholder's basis in the stock. No tax yet.
- Anything left over, once basis hits zero, is treated as gain from selling the stock.
In practice, for a profitable company that pays a normal dividend, almost all of it lands in bucket one. The company already paid 21% on that profit under §11. The shareholder now pays tax on the same profit again, under §301(c) and §316(a).
That is the whole mechanism. Profit gets taxed once at the company, then again at the shareholder, on the portion that reaches them as a dividend.
Why "always avoid it" is the wrong lesson
The second tax only happens when money is actually paid out as a dividend. If the company keeps its profit and reinvests it instead, there is no distribution, so there is nothing for §301(c) and §316(a) to tax that year. The company still owes the 21% under §11, but the shareholder owes nothing on profit that stays inside the company.
This is why many growth-stage C corporations run for years without a shareholder ever paying the second layer. The double tax is a cost of taking money out, not a cost of owning the company.
🇺🇸 If the IRS counts you as a U.S. person
You report the dividend on your own return, in the year you receive it. Depending on how long you have held the stock and whether the dividend qualifies for the lower "qualified dividend" rates, you pay somewhere between 0% and 20% on top of the 21% the company already paid at the corporate level, plus a possible 3.8% net investment income tax.
Nobody withholds this for you in advance if you are a U.S. shareholder of a domestic company. You calculate it and pay it when you file, the same way you handle any other income that shows up on a Form 1099-DIV.
🌏 If it does not
IRC §871(a)(1) sets your rate directly: a flat 30% "of the amount received" on U.S.-source dividends paid to a nonresident alien, as long as the income is not effectively connected with a U.S. trade or business you run yourself.
The company withholds this before the money reaches you. You do not add it to a return and calculate a rate. There is no bracket, no netting against expenses, and no deduction — 30% comes off the gross dividend at the source.
A tax treaty between the United States and your country of residence can lower that 30% rate, sometimes to 15% or less. Which rate applies to you depends on the specific treaty your country has with the United States, and we have not verified individual treaty rates here — that is covered in a separate article on tax treaties.
The gap
| What happens | 🇺🇸 U.S. person | 🌏 Not a U.S. person |
|---|---|---|
| First tax layer | 21% at the company, IRC §11 | Same: 21% at the company, IRC §11 |
| Does the second layer depend on a distribution? | Yes — no dividend, no second tax | Same — no dividend, no second tax |
| How the second layer is collected | You self-report the dividend and pay when you file | The company withholds 30% before you receive the money |
| Rate on the second layer | 0-20% qualified dividend rate, plus possible 3.8% NIIT | Flat 30% under §871(a)(1), unless a treaty lowers it |
| Can you reduce the rate with expenses or deductions? | Yes, through your own return | No — withholding is on the gross amount received |
Both groups face the same two layers of tax on the same profit. What differs is the collection method for the second layer: a return you file yourself, against a flat percentage taken at the source before you ever touch the money.
Common mistakes
🇺🇸 If the IRS counts you as a U.S. person
- Assuming every distribution from a C corporation is automatically a taxable dividend. Check whether the company actually has earnings and profits under §316(a) first — a return of capital is not taxed the same way.
- Forgetting the net investment income tax on top of the dividend rate, then being surprised by the bill in April.
- Treating "double taxation" as a reason to never use a C corporation, even when the plan is to reinvest profit for years before any distribution happens.
🌏 If it does not
- Expecting to file a return and claim deductions against the dividend the way a U.S. shareholder does. The 30% under §871(a)(1) is withheld on the gross amount; there is nothing to net it against.
- Not checking whether a tax treaty with your country of residence lowers the 30% rate before assuming it applies at full rate.
- Assuming the withholding is optional or something you can defer. The company withholds it before the money reaches you, not something you settle later.
FAQ
Does a C corporation always pay tax twice on the same profit?
Only if the profit is distributed as a dividend. The company pays 21% under §11 every year it has taxable income, whether or not it distributes anything. The second tax, under §301(c) and §316(a), only applies to the portion actually paid out to shareholders as a dividend. Profit that stays in the company is taxed once.
If I am a non-resident shareholder, do I file a U.S. tax return for my dividend?
Not to report the dividend itself. The company withholds 30% under §871(a)(1) before you receive the money, so the U.S. tax on that income is already collected at the source. You may still need to file for other reasons connected to the company, but the dividend withholding itself does not require a return from you.
Can a tax treaty reduce the 30% withholding rate on dividends?
Yes, many treaties lower the rate, sometimes to 15% or less, depending on your country of residence and the treaty terms. The specific rate for your country is not covered in this article — see the separate page on tax treaties.
Does an LLC have this same double-taxation problem?
No, not by default. A single-member or multi-member LLC is disregarded or taxed as a partnership unless it elects to be taxed as a corporation, so profit passes through to the owners' own returns and is taxed once, at the owner level. The two-layer structure described here applies specifically to a C corporation.
If my C corporation never pays a dividend, do I ever pay the second tax?
Not on that profit, not while it stays undistributed. The company still owes the 21% corporate tax under §11 every year it has taxable income. The second layer under §301(c) and §316(a) only arises when a distribution actually happens.
Is the 30% withholding on gross dividends or can I subtract expenses first?
It applies to "the amount received" under §871(a)(1) — the gross dividend. There is no mechanism to subtract expenses or deductions against it the way a U.S. shareholder can factor things into their own return.
Does an S corporation have this same double-taxation issue?
No. An S corporation's income passes through to shareholders and is taxed once, at the shareholder level, similar to an LLC. But a non-resident alien cannot be an S corporation shareholder at all, so the comparison does not apply to that group.
What counts as a "dividend" instead of a tax-free return of my investment?
Under §316(a), a distribution is a dividend only if it comes out of the company's earnings and profits, either from this year or accumulated since 28 February 1913. A distribution that exceeds available earnings and profits is treated first as a reduction of your stock basis, and only after that as gain from a sale, under §301(c).