The federal taxation of investment income depends on two things: what kind of income it is and how long you held the asset that produced it. Interest and ordinary dividends are taxed at the same rates as wages, running from 10% to 37% for 2026.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Long-term capital gains and qualified dividends get preferential rates of 0%, 15%, or 20%. And once your income crosses certain thresholds, an extra 3.8% surtax piles on top. The gap between ordinary and preferential treatment is wide enough that knowing which rules apply to each stream can change your tax bill by thousands of dollars.
Interest Income
Money earned from savings accounts, certificates of deposit, corporate bonds, and most other debt instruments counts as interest income. The IRS taxes it at ordinary income rates, the same brackets that apply to your paycheck.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 A single filer with $75,000 in taxable income pays the same rate on a $500 interest payment as on the last $500 of wages.
Any bank, credit union, or brokerage that pays you at least $10 in interest sends you Form 1099-INT, with a copy to the IRS.2Internal Revenue Service. About Form 1099-INT, Interest Income You owe tax in the year the interest is credited to your account, even if you never withdraw it.
One important exception: interest from bonds issued by state and local governments is generally excluded from federal income tax.3Office of the Law Revision Counsel. 26 U.S.C. 103 – Interest on State and Local Bonds This is why investors in higher brackets often buy municipal bonds despite lower stated yields. A 4% tax-free return can beat a 5% taxable one after you account for the tax. Not every muni qualifies, though. Certain private activity bonds produce taxable interest or trigger the alternative minimum tax, and taxable municipal bonds are taxed like corporate bond interest.
Dividends: Ordinary vs. Qualified
When a company pays out profits to shareholders, those payments fall into one of two buckets. The difference in tax treatment is dramatic.
Ordinary dividends are taxed at your regular income rates, up to 37%.4Internal Revenue Service. Topic No. 404, Dividends and Other Corporate Distributions Most dividends start as ordinary by default and only earn the lower qualified rate if they pass a holding-period test.
Qualified dividends are taxed at the same 0%, 15%, or 20% rates as long-term capital gains. To qualify, you need to have owned the stock more than 60 days during the 121-day window that begins 60 days before the ex-dividend date. The rule exists to stop investors from buying a stock the day before its dividend, pocketing the payout at the low rate, and selling immediately.
Your brokerage reports both types on Form 1099-DIV, with qualified dividends broken out separately in Box 1b.5Internal Revenue Service. Instructions for Form 1099-DIV – Section: Box 1b Qualified Dividends For someone in the 37% bracket, the difference between ordinary and qualified treatment on $10,000 of dividends works out to roughly $1,700.
If you own international stocks or funds, foreign governments may withhold tax on dividends before the money reaches you. The IRS lets you claim a foreign tax credit for those withholdings to prevent double taxation.6Internal Revenue Service. Publication 514, Foreign Tax Credit for Individuals Mutual fund shareholders can generally claim their share of foreign taxes when the fund passes the credit through on your 1099-DIV.
Capital Gains
A capital gain is the profit from selling an asset for more than you paid. The tax rate turns almost entirely on how long you held it.
Short-Term Gains
Sell an asset you’ve owned a year or less and the profit is a short-term capital gain, taxed at ordinary income rates.7Internal Revenue Service. Topic No. 409, Capital Gains and Losses Flipping a stock after three months means the IRS treats your profit exactly like a bonus from your employer.
Long-Term Gains
Hold longer than a year and the profit qualifies for preferential rates of 0%, 15%, or 20%. For 2026, the brackets are:1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
- 0% rate: single filers with taxable income up to $49,450, or married couples filing jointly up to $98,900.
- 15% rate: single filers above $49,450 through $545,500, or married couples filing jointly above $98,900 through $613,700.
- 20% rate: single filers above $545,500 and married couples filing jointly above $613,700.
Most households land in the 15% bracket. The 0% rate is genuinely useful for retirees or anyone in a lower-income year who wants to harvest gains tax-free.
One carve-out worth knowing: gains from selling collectibles like coins, art, antiques, and stamps face a maximum rate of 28% regardless of holding period.7Internal Revenue Service. Topic No. 409, Capital Gains and Losses If your ordinary rate is lower, you pay the ordinary rate; otherwise, the 28% cap applies.
Capital Losses and the Wash Sale Rule
Losing money on an investment has a silver lining. Capital losses offset capital gains dollar for dollar, and you can use up to $3,000 of excess losses per year ($1,500 if married filing separately) to reduce your ordinary income.8Office of the Law Revision Counsel. 26 U.S.C. 1211 – Limitation on Capital Losses Anything beyond that carries forward to future tax years indefinitely. You report gains and losses on Schedule D.
The trap that catches a lot of people is the wash sale rule. Sell a stock at a loss and buy the same stock (or something substantially identical) within 30 days before or after the sale, and the IRS disallows the loss entirely.9Office of the Law Revision Counsel. 26 U.S.C. 1091 – Loss From Wash Sales of Stock or Securities The disallowed loss gets added to the basis of the replacement shares, so you recover the benefit eventually, just not when you planned. If you want to stay invested in a similar sector after tax-loss harvesting, pick a genuinely different security or wait out the 30-day window.
The 3.8% Net Investment Income Tax
Higher earners owe an extra 3.8% surtax on investment income, formally called the Net Investment Income Tax. It applies to interest, dividends, capital gains, rental income, and several other passive streams.10Office of the Law Revision Counsel. 26 U.S.C. 1411 – Imposition of Tax It kicks in when your modified adjusted gross income crosses:11Internal Revenue Service. Net Investment Income Tax
- $200,000 for single or head of household
- $250,000 for married filing jointly
- $125,000 for married filing separately
You owe 3.8% on whichever is smaller: your net investment income or the amount by which your income exceeds the threshold. A single filer earning $230,000 with $50,000 in investment income pays the surtax on $30,000, not the full $50,000. These thresholds are fixed in the statute and have never been adjusted for inflation, so they catch more taxpayers every year. Calculate the tax on Form 8960 and file it with your return.12Internal Revenue Service. Instructions for Form 8960
Paying as You Go: Estimated Taxes
Wages come with automatic withholding. Investment income doesn’t. If you expect to owe at least $1,000 after withholding and credits, the IRS wants quarterly estimated payments.13Internal Revenue Service. 2026 Form 1040-ES Estimated Tax for Individuals
For 2026, the due dates are April 15, June 15, and September 15 of 2026, then January 15, 2027. You can skip that final payment if you file your return and pay the balance by February 1, 2027.
To avoid underpayment penalties, your withholding and estimated payments combined need to cover the smaller of 90% of your 2026 tax or 100% of your 2025 tax. If your 2025 adjusted gross income exceeded $150,000 ($75,000 if married filing separately), that 100% figure rises to 110%. The 110% safe harbor is what most investors with fluctuating income lean on, because it works no matter how much your investment income jumps year to year.
Investments Inside Retirement Accounts
The rules shift substantially when your investments sit inside a tax-advantaged retirement account.
Traditional 401(k) and IRA contributions are generally deductible, and the investments grow without any annual tax on interest, dividends, or gains. The tradeoff: every dollar you withdraw in retirement counts as ordinary income.14Internal Revenue Service. Retirement Plans FAQs Regarding IRAs Distributions (Withdrawals) Withdrawals before age 59½ typically add a 10% early withdrawal penalty on top of the regular income tax.15Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions You can’t defer forever, either. Required minimum distributions begin at age 73, and missing one triggers a 25% excise tax on the amount you should have withdrawn (dropping to 10% if you correct within two years).16Internal Revenue Service. Retirement Topics – Required Minimum Distributions (RMDs)
Roth accounts flip the model. You contribute after-tax money with no upfront deduction, and qualified withdrawals of both contributions and growth come out completely tax-free.17Internal Revenue Service. Roth IRAs To get that treatment, the account must be at least five years old and you need to be 59½ or older, or meet a narrow exception. Decades of compounding interest, dividends, and gains can be accessed without owing a dime more in tax.
Inherited Investments and the Step-Up in Basis
When you inherit an investment, your cost basis resets to the asset’s fair market value on the date of the previous owner’s death.18Office of the Law Revision Counsel. 26 U.S.C. 1014 – Basis of Property Acquired From a Decedent If your parent bought stock for $10,000 thirty years ago and it was worth $200,000 at their death, your basis is $200,000. Sell it the next week for $201,000 and you owe capital gains tax on $1,000, not $191,000. That $190,000 of unrealized gain disappears for income tax purposes.
The step-up applies to real estate, stocks, bonds, mutual funds, collectibles, and most other capital assets. It does not apply to retirement accounts, where beneficiary withdrawals still count as ordinary income. The IRS also treats inherited assets as having an automatic long-term holding period, so even a quick sale after inheriting gets the preferential rate.
If you’ve inherited investments, confirm the stepped-up basis with the estate executor before selling. Using the wrong basis can mean overpaying your tax bill by a significant amount.