How to Shift Income to a C-Corp at the 21% Rate

A business owner in the top bracket pays 37% federal on pass-through income, plus state, plus self-employment or net investment income tax. The combined marginal rate routinely exceeds 45%.

A C-Corporation pays a flat 21% under IRC Sec. 11(b). On every dollar. No brackets, no phase-in.

That 24-point spread is the opportunity, and the strategy is not to convert your business. It is to move a defined slice of income into a corporation taxed at 21% while the operating business stays a pass-through.

The Basic Mechanic

You form a C-Corporation that provides something the operating business genuinely needs. The operating entity pays the corporation a fee for it. That fee is deductible to the operating entity at 45%-plus and taxable to the corporation at 21%.

Shift $250,000 and the annual spread is roughly $60,000.

The critical condition, and the one that ends the analysis for many owners: the money has to stay in the corporation. Distribute it as a dividend and you add a second layer at up to 23.8% including NIIT, which brings the combined rate to roughly 39.8% federal and erases most of the advantage.

So this works for owners who are accumulating, reinvesting, or funding something inside the corporation. It does not work for owners who need every dollar personally. See the C-Corp tax strategy guide.

Structure 1: Management Company

The most common version. The C-Corp provides executive management, administrative services, HR, marketing, back-office operations, or strategic oversight to the operating entity under a written services agreement.

What makes it real: the corporation has to actually do the work. That means employees or contractors performing services, a scope of work in writing, invoices issued on a regular cycle, and records of what was delivered. The owner can be the employee performing the services, but then the corporation must run payroll and the owner's compensation must be reasonable.

Pricing has to be supportable. Common approaches are cost-plus, where the fee equals the corporation's costs plus a market markup, or a market-rate comparison against what a third-party management firm would charge for the same scope.

Structure 2: Intellectual Property Licensing

The C-Corp owns trademarks, software, proprietary processes, customer lists, or brand assets, and licenses them to the operating entity for a royalty.

This is clean when the IP is genuinely developed in or transferred to the corporation, is genuinely used by the operating business, and the royalty rate reflects market terms for comparable IP. Royalty rates in the 3% to 8% of revenue range are common depending on the industry and the significance of the IP.

Two cautions. First, transferring existing appreciated IP into a corporation has its own tax consequences and should be structured under IRC Sec. 351 where possible. Second, royalty income is passive-type income for personal holding company purposes, so a corporation whose income is predominantly royalties needs to monitor the IRC Sec. 541 tests carefully.

Structure 3: Equipment or Facility Leasing

The C-Corp owns equipment, vehicles, or real property used by the operating business and leases it at market rates.

This has a secondary benefit: the corporation depreciates the assets, and with 100% bonus depreciation permanent under the One Big Beautiful Bill Act, that depreciation can offset the lease income substantially in early years. See why your C-Corp should own real estate.

The Arm's-Length Requirement Is Not Optional

IRC Sec. 482 gives the IRS authority to reallocate income and deductions among commonly controlled businesses when the terms between them do not reflect arm's-length dealing. This is the provision that unwinds sloppy structures, and the reallocation typically comes with penalties.

Five things a defensible structure has:

1. A written agreement executed before the services begin. Scope, term, pricing, and payment terms. Backdated agreements are worse than no agreement.
2. Pricing supported by evidence. Written quotes from third-party providers, published rate surveys, or a documented cost-plus computation. Keep the support in the file.
3. Actual performance. The services must happen. Deliverables, meeting records, work product, time records.
4. Real payment flows. Invoices issued, payments made on the stated terms, from the operating entity's account to the corporation's account. Not a year-end journal entry.
5. Corporate formalities. Separate bank accounts, board minutes, annual filings, its own books. A corporation that is not respected as separate will not be respected by an examiner either.

The failure mode is always the same: a $300,000 "management fee" with no agreement, no invoices, no evidence of services, and a single December transfer. That gets reallocated.

What You Do With the Money Inside

Retained income at 21% is only useful if it does something. The productive uses:

Fund benefits. A MERP under IRC Sec. 105(b) lets the corporation reimburse the owner-employee's medical expenses tax-free, which an S-Corp cannot do for a more-than-2% shareholder. See MERP through your C-Corp.

Buy real estate. A closely held C corporation can offset passive activity losses against net active income under IRC Sec. 469(e)(2), an exception unavailable to individuals. Combined with cost segregation, this can shelter the shifted income itself. See the closely held C-Corp passive loss rule.

Fund a retirement plan. The corporation can sponsor a 401(k) or defined benefit plan for its employees, including the owner.

Acquire businesses or equipment. Buying with 79-cent dollars instead of 55-cent dollars is a meaningful advantage in an acquisition strategy.

The Accumulated Earnings Problem

If the plan is to retain earnings, address IRC Sec. 531 before it becomes an issue.

The accumulated earnings tax imposes 20% on income accumulated beyond the reasonable needs of the business where the purpose is avoiding shareholder-level tax. IRC Sec. 535(c) provides a credit of $250,000 of accumulated earnings, or $150,000 for a personal service corporation.

Above that, you defend with documented business needs under Treas. Reg. 1.537-2: working capital computed under the operating cycle approach, a specific expansion plan, an acquisition program, debt retirement, or a funded buy-sell obligation. Board minutes adopting a written plan with amounts and timelines, created contemporaneously, are the defense.

Also watch IRC Sec. 541. If 60% or more of adjusted ordinary gross income is personal holding company income, dividends, interest, royalties, certain rents, and the ownership test is met, the personal holding company tax applies at 20% on undistributed PHC income. A shifting structure built on royalties or rents can drift into this without anyone noticing.

Where This Fails

You need the money. If profit funds your lifestyle, shifting it into a corporation just delays and then double-taxes it.

The services are fictional. A structure with no substance is a reallocation waiting to happen.

You give up more QBI than you gain. Fees paid to the C-Corp reduce the pass-through's qualified business income. For an owner receiving a full 20% deduction under IRC Sec. 199A, that giveback can exceed the rate arbitrage. For a specified service business above the phaseout, there is no QBI to lose, which is why this strategy fits SSTB owners particularly well.

State treatment kills it. Some states impose entity-level taxes or minimum fees that change the math. Model your state before you file anything.

The exit is expensive. Assets inside a C-Corp are hard to extract without tax. Distributions of appreciated property trigger gain under IRC Sec. 311(b), and an asset sale produces corporate tax plus shareholder tax on the proceeds. Plan the exit at formation, not at closing. See S-Corp vs. C-Corp for high earners and structuring multiple businesses.

Who This Fits

The profile is fairly specific: pass-through income above roughly $500,000, at least $150,000 to $200,000 of annual profit you do not need personally, a genuine function that can be housed in a separate entity, and either no QBI deduction or a small one. Add real estate ambitions or significant medical costs and the case strengthens considerably.

Outside that profile, an optimized S-Corp is usually the better answer. See the S-Corp optimization guide.

Frequently Asked Questions

How much can I save by shifting income to a C-Corp?

The spread between a top pass-through marginal rate of roughly 45% and the flat 21% corporate rate under IRC Sec. 11(b) is about 24 points. Shifting $250,000 therefore saves roughly $60,000 per year, provided the income stays inside the corporation. Distributing it as a dividend adds a second layer of up to 23.8% and eliminates most of the benefit.

What kinds of fees can my operating business pay to my C-Corp?

The three common structures are a management services fee for executive, administrative, or back-office services; a royalty for intellectual property the corporation owns and the operating business uses; and lease payments for equipment, vehicles, or real property the corporation owns. In every case the arrangement must be real, priced at arm's length, and documented in advance.

What happens if the IRS thinks my management fee is too high?

IRC Sec. 482 allows the IRS to reallocate income and deductions between commonly controlled entities that are not dealing at arm's length. The deduction is reduced at the operating entity, the income stays taxable, and penalties may apply. The defense is a written agreement executed in advance, pricing supported by third-party quotes or rate surveys, evidence that services were actually performed, and real payment flows.

Does income shifting reduce my QBI deduction?

Yes. Fees paid to the C-Corp reduce the pass-through entity's qualified business income, which reduces any deduction under IRC Sec. 199A. For an owner receiving a full 20% deduction, that giveback can exceed the rate arbitrage. For a specified service business above the phaseout, where no QBI deduction is available anyway, there is nothing to lose.

How much can I accumulate in the C-Corp before the accumulated earnings tax applies?

IRC Sec. 535(c) provides a credit of $250,000 of accumulated earnings, or $150,000 for a personal service corporation. Above that, accumulation must be justified by reasonable business needs under Treas. Reg. 1.537-2, such as documented working capital requirements, a specific expansion plan, an acquisition program, or debt retirement, evidenced by board minutes adopted contemporaneously.

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