Yes, a business can invest in stocks. A corporation, LLC, or partnership is a separate legal person under state law, with the same general power an individual has to buy, hold, and sell securities in its own name. The practical work sits in four places: confirming your governing documents allow it, passing a resolution that names who can trade, opening a brokerage account under the entity, and understanding how the profits will be taxed. That last piece depends heavily on whether you run a C-corporation or a pass-through.
The Legal Authority Is Already There
State business corporation statutes give every corporation the same general powers as an individual to do what is necessary or convenient to carry out its business, including the explicit power to invest and reinvest funds, own shares in other companies, and make contracts. LLCs and partnerships get similarly broad authority under their own state statutes. Unless your governing documents say otherwise, your entity already has the legal power to buy stocks.
The limits, if any, come from your internal documents: the articles of incorporation for a corporation, the operating agreement for an LLC. If those documents restrict or prohibit securities investing, the entity cannot invest until the members or shareholders amend them. If the documents are silent, the broad state-law powers control.
Authorize the Activity Internally Before You Trade
Before placing any trades, your board of directors (or managing members, in an LLC) should pass a formal corporate resolution. The resolution names the specific individuals authorized to open accounts, execute trades, and move funds on the entity’s behalf. Brokerages will ask for a copy during account opening as proof that the person submitting orders can actually bind the company. Without one, you risk application rejection and internal disputes over who approved a given trade.
A written investment policy is worth adopting alongside the resolution. It sets out the entity’s goals, risk tolerance, permitted asset classes, and concentration limits. Officers and directors owe fiduciary duties when managing company assets, meaning they must act with reasonable care and in the entity’s best interest. A written policy creates a clear framework for those decisions and shows that investment activity was deliberate rather than speculative.
Documents You Need to Open a Business Brokerage Account
Every brokerage requires the entity’s Employer Identification Number, the nine-digit tax identifier the IRS issues in place of a Social Security number for business tax reporting.1Internal Revenue Service. Get an Employer Identification Number If the business does not have one, you can apply online at irs.gov and receive it immediately.
You will also need certified copies of your state formation documents: articles of incorporation for a corporation, articles of organization for an LLC. Some brokerages additionally require a certificate of good standing from the state where the entity is registered, confirming the business is current on its filings. Fees for that certificate vary by state, typically $5 to $25.
Federal anti-money-laundering rules require the brokerage to identify every individual who owns 25 percent or more of the entity’s equity, as well as at least one person with significant control over the company.2Financial Crimes Enforcement Network. Information on Complying with the Customer Due Diligence (CDD) Final Rule Each of those people must provide a full legal name, date of birth, home address, and Social Security number.
The entity itself completes IRS Form W-9 to give the brokerage its taxpayer identification number and certify its tax status. Skip this step and the brokerage must withhold 24 percent of any reportable payments, including dividends and sale proceeds, as backup withholding.3Internal Revenue Service. Form W-9 (Rev. March 2024)
Most brokerages then hand you an “Entity Account Application” that asks the business to declare its entity type, industry, and purpose for the account. Answer accurately. Broker-dealers are required by federal regulation to maintain a written anti-money-laundering program and a customer identification program that verifies the details you provide.4eCFR. 31 CFR Part 1023 – Rules for Brokers or Dealers in Securities
After the brokerage verifies the business and its beneficial owners against government databases and federal watchlists (usually several business days), you link a business bank account through the ACH network, fund the account, and the person named in the resolution can start placing trades.
How Business Stock Investments Are Taxed
The tax path splits by entity structure.
C-Corporations
A C-corporation pays tax on all income, including dividends and capital gains from stocks, at the flat federal corporate rate of 21 percent.5Office of the Law Revision Counsel. 26 U.S. Code 11 – Tax Imposed Tax is owed at the entity level before any money reaches shareholders. If the corporation then distributes the after-tax profits as dividends, shareholders pay tax again on those dividends on their personal returns. That is the double taxation people talk about with C-corps.
Pass-Through Entities
S-corporations, partnerships, and most multi-member LLCs do not pay federal income tax at the entity level. Each owner reports their share of the investment income on their personal return. S-corporation shareholders include their pro rata share of the company’s income, losses, deductions, and credits on their individual returns.6Office of the Law Revision Counsel. 26 U.S. Code 1366 – Pass-Thru of Items to Shareholders Partnerships and multi-member LLCs taxed as partnerships are not themselves subject to income tax; the partners are taxed on their distributive share.7Office of the Law Revision Counsel. 26 U.S. Code 701 – Partners, Not Partnership, Subject to Tax A single-member LLC reports everything on the owner’s personal return.
Net Investment Income Tax
Individual owners of pass-throughs face an additional 3.8 percent Net Investment Income Tax on investment gains that flow through to them once their modified adjusted gross income crosses $250,000 for married filing jointly, $200,000 for single filers, or $125,000 for married filing separately.8Internal Revenue Service. Topic No. 559, Net Investment Income Tax It applies on top of regular income tax and covers dividends, capital gains, and other investment income coming through the entity. C-corporations do not owe the NIIT at the entity level, but their shareholders may owe it on dividend distributions they receive.
The Dividends Received Deduction (C-Corps Only)
C-corporations get a tax break individuals and pass-throughs do not. When a C-corporation receives dividends from stock it owns in another domestic corporation, it can deduct a large portion of those dividends from taxable income rather than paying tax on the full amount.9Office of the Law Revision Counsel. 26 U.S. Code 243 – Dividends Received by Corporations The percentage scales with ownership:
- Less than 20 percent ownership: 50 percent of dividends deductible.
- 20 percent or more ownership: 65 percent deductible.
- 80 percent or more ownership (affiliated group): 100 percent deductible.
To qualify, the corporation must hold the stock for more than 45 days during the 91-day window that begins 45 days before the ex-dividend date.10Office of the Law Revision Counsel. 26 U.S.C. 246 – Rules Applying to Deductions for Dividends Received Buying a stock right before the dividend and selling right after will not produce a deductible dividend. For preferred stock dividends covering a period longer than 366 days, the required holding period rises to more than 90 days.
Losses and the Wash Sale Rule
Not every trade turns a profit, and the loss rules also differ by entity.
A C-corporation can only use a capital loss to offset capital gains, not ordinary business income. If capital losses exceed capital gains for the year, the corporation can carry the excess back to offset capital gains in the three prior years, or forward for up to five years.11Office of the Law Revision Counsel. 26 U.S.C. 1212 – Capital Loss Carrybacks and Carryovers Anything unused after five years expires worthless.
When capital losses flow through to individual owners of an S-corp, LLC, or partnership, the rules change. Individuals cannot carry losses back at all; they carry forward indefinitely. In any given year, an individual can deduct only $3,000 of net capital losses against ordinary income ($1,500 for married filing separately), with the rest rolling forward.12Office of the Law Revision Counsel. 26 U.S. Code 1212 – Capital Loss Carrybacks and Carryovers
The wash sale rule applies to everyone. If you buy substantially identical stock within 30 days before or after the sale that generated the loss, the loss is disallowed.13Office of the Law Revision Counsel. 26 U.S. Code 1091 – Loss From Wash Sales of Stock or Securities The rule covers corporations, LLCs, partnerships, and individuals. The only exception is for securities dealers who sustain the loss in the ordinary course of their dealing business. When the rule applies, the disallowed loss is added to the cost basis of the replacement shares, so the loss is deferred rather than permanently lost.
Watch for the Personal Holding Company Tax
Closely held C-corporations that pile cash into a stock portfolio can fall into the personal holding company tax. The IRS imposes an additional 20 percent tax on undistributed personal holding company income when a corporation meets two tests in the same year.14Office of the Law Revision Counsel. 26 U.S. Code 541 – Imposition of Personal Holding Company Tax
- Income test: at least 60 percent of the corporation’s adjusted ordinary gross income comes from investment sources such as dividends, interest, rents, and royalties.15Internal Revenue Service. Instructions for Schedule PH (Form 1120)
- Ownership test: more than 50 percent of outstanding stock is owned, directly or indirectly, by five or fewer individuals at any time during the last half of the tax year.16Office of the Law Revision Counsel. 26 U.S. Code 542 – Definition of Personal Holding Company
A small C-corp that shifts most of its cash into stocks can hit both tests without meaning to. The 20 percent tax sits on top of the regular 21 percent corporate rate, so the combined federal rate on undistributed investment income can reach 41 percent. The usual fix is to distribute enough of the investment earnings as dividends to shareholders that little or no undistributed personal holding company income remains. S-corporations, partnerships, and LLCs taxed as partnerships are not subject to these rules.
Year-End Reporting and Penalties
Each year the brokerage will issue Form 1099-DIV for any dividends the entity received and Form 1099-B for the proceeds from each sale of securities.17Internal Revenue Service. About Form 1099-DIV, Dividends and Distributions18Internal Revenue Service. About Form 1099-B, Proceeds From Broker and Barter Exchange Transactions The 1099-B lists gross proceeds and cost basis for each transaction, which the entity uses to calculate net gain or loss for the year.
If the entity or its owners understate the tax owed on investment income, the IRS can impose a 20 percent accuracy-related penalty on the underpayment.19Office of the Law Revision Counsel. 26 U.S.C. 6662 – Imposition of Accuracy-Related Penalty on Underpayments That penalty rises to 40 percent for gross valuation misstatements or undisclosed transactions lacking economic substance. Keep detailed records of every purchase date, sale date, cost basis, and dividend payment; those records are what protects the business when the IRS asks.