A taxable brokerage account earns no tax shelter: every year, the IRS taxes what your investments produce, and the rate depends on what kind of income it is and how long you held the asset. Understanding how taxable brokerage accounts are taxed comes down to four pieces — the capital gains rate that turns on a one-year holding period, the split between qualified and ordinary dividends, the full ordinary-income treatment of interest, and a 3.8% surtax that stacks on top for higher earners.
Capital Gains and the One-Year Line
When you sell an investment for more than you paid, the profit is a capital gain. The tax rate on that gain depends almost entirely on how long you owned the asset.
Held one year or less, the gain is short-term and taxed at your ordinary income rate, which can reach 37% for top earners in 2026. Held more than one year, the gain is long-term and taxed at 0%, 15%, or 20% depending on your taxable income and filing status.1Internal Revenue Service. Topic No. 409, Capital Gains and Losses The holding period starts the day after you buy and includes the day you sell.
For 2026, a single filer pays 0% on long-term gains up to roughly $49,450 of taxable income, 15% in the middle range up to about $545,500, and 20% above that. Married couples filing jointly get wider brackets, with the 15% rate applying up to about $613,700. These thresholds adjust each year for inflation.
The practical effect is blunt: selling a winner one day too early can nearly double the tax on that gain. If you’re close to the one-year mark on a large unrealized gain, waiting matters.
Qualified vs. Ordinary Dividends
Dividends split into two categories with very different rates.
A dividend is qualified, and taxed at the same 0%, 15%, or 20% long-term capital gains rates, if you held the underlying stock for more than 60 days during the 121-day window surrounding the ex-dividend date and the paying corporation meets certain requirements.2Internal Revenue Service. Topic No. 404, Dividends and Other Corporate Distributions Most dividends from major U.S. corporations qualify as long as you’re not buying right before the dividend and selling right after. The holding rule exists to block that arbitrage.
Dividends that miss those requirements are ordinary (or nonqualified) and taxed at your regular income rate. Real estate investment trust distributions, money market fund dividends, and dividends on stock you held too briefly all fall into this bucket.
Dividends from foreign companies often face withholding by the source country before the money hits your account. The default U.S. withholding rate on payments to foreign persons is 30%, though tax treaties reduce it to 15% or less for many countries. If a foreign government withholds tax on your dividends, you can generally claim a foreign tax credit on your U.S. return to avoid double taxation, up to certain limits.
How Interest Is Taxed
Interest gets the worst treatment. Whether it comes from a savings account, a certificate of deposit, or a corporate bond, every dollar of interest counts as ordinary income at your full marginal rate. No preferential brackets apply. A top-bracket investor keeps 63 cents of each dollar before state taxes.
You owe the tax in the year the interest is received or accrued, even if you leave the money in the account. Your bank or brokerage reports the income on Form 1099-INT for any amount of $10 or more.3Internal Revenue Service. About Form 1099-INT, Interest Income
One important exception: interest from municipal bonds issued by state and local governments is generally excluded from federal gross income.4Office of the Law Revision Counsel. 26 USC 103 – Interest on State and Local Bonds Not every municipal bond qualifies, and some are subject to the alternative minimum tax, but for high-bracket investors the savings can be substantial. A municipal bond yielding 3.5% can deliver more after-tax income than a taxable bond yielding 5%.
The 3.8% Net Investment Income Tax
Investors above certain income levels owe an additional 3.8% surtax on investment income, formally the Net Investment Income Tax. It applies to interest, dividends, capital gains, rental income, royalties, and passive business income.5Office of the Law Revision Counsel. 26 USC 1411 – Imposition of Tax
The tax hits the lesser of your net investment income or the amount your modified adjusted gross income exceeds these thresholds:
- Single or head of household: $200,000
- Married filing jointly: $250,000
- Married filing separately: $125,000
The thresholds are fixed by statute, with no inflation adjustment, so more taxpayers cross them each year. An investor with $280,000 in modified adjusted gross income and $50,000 in net investment income, filing single, owes 3.8% on the lesser of $50,000 or $80,000 — that’s $1,900 on top of regular tax.5Office of the Law Revision Counsel. 26 USC 1411 – Imposition of Tax Stack it on top of the 20% long-term capital gains rate and the effective federal rate on long-term gains reaches 23.8% for top earners.
Using Losses to Cut the Tax
Losses aren’t wasted. They reduce your tax in a structured way.
Capital losses first offset capital gains of the same type: short-term losses reduce short-term gains, long-term losses reduce long-term gains. When losses of one type exceed gains of that type, the excess crosses over to offset the other. This netting happens on Schedule D.6Internal Revenue Service. About Schedule D (Form 1040), Capital Gains and Losses
If your total capital losses exceed your total capital gains for the year, you can deduct up to $3,000 of the net loss against ordinary income like wages and interest ($1,500 if married filing separately).7Office of the Law Revision Counsel. 26 USC 1211 – Limitation on Capital Losses
Anything beyond the $3,000 annual deduction carries forward indefinitely. There is no expiration. Realize a $40,000 net capital loss with no gains to offset, and you deduct $3,000 that year and carry $37,000 into future years, applying it against future gains or continuing to take $3,000 a year against ordinary income. Individuals cannot carry capital losses backward to prior years; that option is limited to corporations.8Office of the Law Revision Counsel. 26 USC 1212 – Capital Loss Carrybacks and Carryovers
The Wash Sale Rule
You cannot claim a loss and then immediately buy the same investment back. Under the wash sale rule, a loss is disallowed if you buy substantially identical stock or securities within 30 days before or 30 days after the sale that produced the loss.9Office of the Law Revision Counsel. 26 USC 1091 – Loss From Wash Sales of Stock or Securities That creates a 61-day window during which repurchasing the same security kills the deduction.
The disallowed loss isn’t lost forever. It gets added to the cost basis of the replacement shares, so you eventually recognize it when those shares are sold, assuming no further wash sale. To take the loss now, you need to wait past the window or buy something that isn’t substantially identical. Swapping one provider’s S&P 500 index fund for another provider’s similar fund is a common approach, though the IRS has never drawn a bright line on what counts as substantially identical for mutual funds.
Forms You’ll Receive and When to File
By early to mid-February, your brokerage and bank send the tax documents reporting what your account produced. The main forms:
- Form 1099-INT reports interest of $10 or more from bank accounts, CDs, and bonds.3Internal Revenue Service. About Form 1099-INT, Interest Income
- Form 1099-DIV reports dividends and capital gain distributions from stocks, mutual funds, and ETFs.
- Form 1099-B reports proceeds from securities you sold, including cost basis if the broker tracked it.10Internal Revenue Service. About Form 1099-B, Proceeds From Broker and Barter Exchange Transactions
Capital gains and losses go on Schedule D of Form 1040. You may also need Form 8949 if your broker didn’t report cost basis or if adjustments apply, such as a wash sale disallowance.6Internal Revenue Service. About Schedule D (Form 1040), Capital Gains and Losses Interest and dividends flow onto the main return, or onto Schedule B when the totals exceed $1,500.
The filing deadline for individual returns is April 15. You can request an automatic six-month extension, but only for the paperwork. Any tax you owe is still due April 15, and interest accrues on unpaid amounts from that date.11Internal Revenue Service. When to File
State Taxes Still Apply
Federal rates are only part of what you owe. Most states tax investment income too, at rates ranging from zero in states with no income tax to above 10% in the highest-tax states. A few states offer reduced rates for long-term capital gains or exempt certain categories, but the majority tax investment income at the same rate as wages. For a high-income resident of a high-tax state, the combined federal and state bite on short-term gains or interest can exceed 45%, which is why holding periods, asset location, and loss harvesting matter as much as they do.