A taxable brokerage account is an investment account you open with a broker-dealer that carries no special federal tax benefits. You fund it with money you’ve already paid income tax on, and from that point every realized gain, dividend, and interest payment is taxable in the year it happens. In exchange for that annual tax exposure, you get flexibility that retirement accounts don’t offer: no contribution limits, no age restrictions on withdrawals, and no penalties for taking money out early.
That combination makes these accounts useful for goals sitting outside the retirement timeline. It also means understanding the tax rules is the difference between keeping your gains and handing more than necessary to the IRS.
What You Can Hold and How Money Moves In and Out
Once cash is in the account, you can buy individual stocks, mutual funds, exchange-traded funds, corporate bonds, municipal bonds, and other securities. There is no federal cap on annual deposits.
Withdrawals work the same way. You can sell holdings and take the cash at any age with no early withdrawal penalty, unlike retirement accounts, which generally impose a 10% penalty on distributions before age 59½.1Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions The tax bill on whatever you sell, though, follows the rules below.
How Capital Gains Are Taxed
You owe capital gains tax only when you sell an investment for more than you paid. A stock that rises in value while you continue to hold it produces an unrealized gain, and unrealized gains are not taxed. The taxable event is the sale.2Internal Revenue Service. Topic No. 409, Capital Gains and Losses
How long you held the investment decides the rate. Short-term capital gains apply to assets held one year or less and are taxed at your ordinary income rates, which run from 10% to 37% for tax year 2026.3Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Long-term capital gains apply to assets held longer than a year and are taxed at 0%, 15%, or 20% depending on your taxable income and filing status.
For 2026, single filers pay:
- 0% on taxable income up to $49,450
- 15% on taxable income from $49,451 to $545,500
- 20% on taxable income above $545,500
For married couples filing jointly, the 0% rate covers taxable income up to $98,900, the 15% rate runs from $98,901 to $613,700, and the 20% rate begins above $613,700. These thresholds adjust for inflation each year.
The holding-period difference matters. Selling a winning investment eleven months in can cost you more than double the tax of selling it thirteen months in.
How Dividends and Interest Are Taxed
Dividends split into two categories. Ordinary dividends are taxed at your regular income tax rate. Qualified dividends get the same favorable rates as long-term capital gains (0%, 15%, or 20%), but only if you meet the holding period requirement: you must have held the stock for more than 60 days during the 121-day window that begins 60 days before the ex-dividend date.4Office of the Law Revision Counsel. 26 U.S. Code 1 – Tax Imposed
Interest earned on cash balances, corporate bonds, and certificates of deposit is taxed as ordinary income in the year you receive it. Municipal bond interest is generally exempt from federal income tax, which is why munis often show up in taxable accounts belonging to investors in higher brackets.5Office of the Law Revision Counsel. 26 U.S. Code 103 – Interest on State and Local Bonds Some muni bonds are also exempt from state income tax if you live in the issuing state, though the treatment varies by jurisdiction.
The 3.8% Net Investment Income Tax
Higher earners owe an additional 3.8% on net investment income, a category that includes capital gains, dividends, interest, and rental income. The surtax applies to the lesser of your net investment income or the amount by which your modified adjusted gross income exceeds the threshold for your filing status:6Office of the Law Revision Counsel. 26 U.S. Code 1411 – Imposition of Tax
- $200,000 for single or head of household filers
- $250,000 for married couples filing jointly
- $125,000 for married filing separately
These thresholds are not indexed for inflation and have not moved since the tax took effect in 2013. Stacked on top of the 20% long-term capital gains rate, a high-earning investor can face an effective federal rate of 23.8% on investment gains.
Using Losses to Lower Your Tax Bill
Selling an investment at a loss can work for you at tax time. Realized losses first offset any capital gains you booked during the same year. If your losses exceed your gains, you can deduct up to $3,000 of the net loss against your ordinary income, or $1,500 if you’re married filing separately.2Internal Revenue Service. Topic No. 409, Capital Gains and Losses Anything beyond that carries forward to future tax years indefinitely under the same rules.7Internal Revenue Service. 2025 Instructions for Schedule D (Form 1040)
The wash sale rule limits this technique. If you buy the same or a substantially identical security within 30 days before or after the loss sale, the IRS disallows the loss in the current year.8Office of the Law Revision Counsel. 26 U.S. Code 1091 – Loss From Wash Sales of Stock or Securities The disallowed amount gets added to the cost basis of the replacement shares, so the benefit is deferred rather than lost permanently. Say you sell a fund at a $2,000 loss and buy a substantially identical fund inside the 30-day window; the $2,000 is not deductible now, but the replacement shares’ basis rises by $2,000. If you want to stay invested in the same asset class without triggering a wash sale, you can buy a different fund that isn’t substantially identical.
Cost Basis Methods Change What You Owe
When you sell shares you bought at different times and prices, the cost basis method decides which shares are treated as sold. That choice directly affects your taxable gain or deductible loss. The IRS allows several methods:9Internal Revenue Service. Publication 550, Investment Income and Expenses
- First-in, first-out treats the oldest shares as sold first. It’s the default if you don’t pick another method, and in a rising market it tends to produce the largest gains because your cheapest shares go first.
- Specific identification lets you pick which shares to sell at the time of the transaction. You can choose high-basis shares to shrink a gain or low-basis shares to maximize a deductible loss.
- Average cost is available only for mutual fund shares and certain dividend reinvestment plan shares. You divide the total cost of all identical shares by the share count to get a per-share basis.10Internal Revenue Service. Publication 551, Basis of Assets
Most brokerage firms let you set your default method on their website. Once you elect average cost for a particular mutual fund, you generally can’t switch back to another method for shares already covered under that election.
Tax Forms You’ll Receive
Each year, your brokerage firm sends you and the IRS forms covering your taxable activity:
- Form 1099-INT reports interest income of $10 or more.11Internal Revenue Service. About Form 1099-INT, Interest Income
- Form 1099-DIV reports dividend distributions of $10 or more, broken out between ordinary and qualified dividends.12Internal Revenue Service. Instructions for Form 1099-DIV
- Form 1099-B reports the proceeds and cost basis of every security you sold.
You use those numbers to complete Schedule D and Form 8949 on your return, where your net capital gain or loss gets calculated. Even if you left every dollar inside the account, each realized gain, dividend, and interest payment is taxable in the year it occurs. Mismatches between what the brokerage reported and what you file can bring an IRS notice, so read each 1099 before you file.
If you also hold financial accounts outside the United States with a combined value above $10,000 at any point during the year, you’ll owe a Report of Foreign Bank and Financial Accounts (FBAR) filing with FinCEN.13Financial Crimes Enforcement Network. Report Foreign Bank and Financial Accounts The requirement applies whether or not those foreign accounts produced any income.
Step-Up in Basis at Death
The tax treatment shifts dramatically when the account holder dies. Every asset in the account has its cost basis reset to fair market value on the date of death.14Office of the Law Revision Counsel. 26 USC 1014 – Basis of Property Acquired From a Decedent This step-up effectively erases every unrealized gain built up during the original owner’s lifetime.
Say you bought stock for $20,000 and it’s worth $100,000 when you die. Your heirs inherit it with a basis of $100,000. If they sell right away for $100,000, they owe nothing in capital gains tax. Without the step-up, that sale would produce $80,000 of taxable gain. This is one reason financial planners often suggest holding highly appreciated assets rather than selling them late in life, since the tax on those gains can disappear entirely at death.