Profits from buying and selling stocks on the same day are taxed as short-term capital gains at ordinary federal income tax rates, which run from 10% to 37% depending on your total taxable income for the year. There is no separate intraday capital gains tax rate. What changes your bill isn’t the rate schedule but how you report the activity: whether the IRS treats you as a casual investor or a trader in securities, and whether you have made a Section 475(f) mark-to-market election.
Why Same-Day Trades Get the Ordinary Income Rate
A stock you buy and sell in a single session is never held longer than a year, so any gain is short-term by definition. Short-term capital gains are taxed at the same graduated rates as wages.1Internal Revenue Service. Topic No. 409, Capital Gains and Losses Your intraday profits stack on top of everything else you earned, and that combined total sets your bracket. For 2026, a single filer pays 10% on the first $11,925 of taxable income and climbs through six more brackets to 37% on income above $626,350.2Internal Revenue Service. Federal Income Tax Rates and Brackets
The preferential 0%, 15%, and 20% long-term rates only apply to assets held more than a year. Day trading, by design, never reaches that threshold. Your gains sit in the same bucket as your paycheck.
Investor or Trader in Securities
The IRS distinguishes between casual investors and people whose trading activity rises to the level of a business. Most people who buy and sell stocks are investors by default, reporting gains and losses on Schedule D and Form 8949, with limited deductions available.
To qualify as a trader in securities, your activity must be substantial, regular, frequent, and continuous, aimed at profiting from short-term price swings rather than long-term appreciation.3Internal Revenue Service. Topic No. 429, Traders in Securities Courts have generally weighed three factors: how often you trade, how long you hold positions, and how much time you devote to trading each day.
There is no bright-line trade count published by the IRS. Practitioners typically point to averaging at least four trades per day on most market days, with an average holding period under 31 days, as a reasonable floor. Occasional trading between other work will not qualify.
Trader status lets you report business expenses on Schedule C. It does not, on its own, change how your trading gains and losses are classified. Without the additional election below, those gains and losses stay capital in character, with all the usual limits.
The Section 475(f) Mark-to-Market Election
Under Section 475(f), a trader in securities can elect mark-to-market accounting. If you make the election, your trading gains and losses become ordinary income and ordinary losses instead of capital gains and losses.3Internal Revenue Service. Topic No. 429, Traders in Securities Three practical consequences follow.
- No capital loss cap. Without the election, you can only deduct $3,000 of net capital losses against other income each year. With it, trading losses are ordinary losses that can offset your full income, subject to the excess business loss limitation.
- Wash sale rules disappear on securities held in your trading business, which is significant administrative relief when you cycle through the same tickers dozens of times a day.
- Year-end deemed sale. Every open position on the last business day of the year is treated as sold at fair market value, so unrealized gains and losses become realized for tax purposes.
How and When to Elect
The deadline is strict. You file a statement with your tax return for the year before the election takes effect, by that return’s original due date without extensions. To elect mark-to-market for 2026, the statement had to be attached to your 2025 return by April 15, 2026.4Internal Revenue Service. Rev. Proc. 99-17 New taxpayers who did not have to file the prior year get two months and 15 days after the start of the election year.3Internal Revenue Service. Topic No. 429, Traders in Securities The IRS almost never grants late-election relief.
When the Election Is a Bad Fit
The year-end deemed sale means you pay tax on paper gains. If you hold anything longer term alongside intraday activity, the forced realization can trigger tax bills you didn’t plan for. The election is also difficult to revoke once made. For traders who end most years profitable and want the loss and wash-sale benefits, the downsides are usually minor.
The Wash Sale Rule and Day Traders
Sell a stock at a loss and buy the same stock or a substantially identical one within 30 days before or after that sale, and the IRS disallows the loss.5Office 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 basis of the replacement shares, so it is deferred rather than gone, but the deferral is the problem. A day trader repeatedly hitting the same ticker can accumulate wash sales that make the year’s taxable income look far larger than the actual economic result.
The window covers 61 days: 30 before the sale, the sale date, and 30 after. It applies to stocks, bonds, ETFs, and mutual funds. As of 2026, it does not apply to cryptocurrency and other digital assets.
Traders who have made the 475(f) election are exempt from the wash sale rule on securities held in their trading business.3Internal Revenue Service. Topic No. 429, Traders in Securities Everyone else has to track wash sales across every trade. Most platforms produce a wash sale report for the account they host, but they cannot see what happens in your other accounts. Cross-account wash sales are your responsibility to identify.
How Losses Work
Loss treatment depends entirely on your status and whether you elected mark-to-market.
Without the Election
Trading losses are capital losses. They offset capital gains dollar for dollar, and any net loss above your gains is deductible against ordinary income only up to $3,000 a year ($1,500 if married filing separately).6Office of the Law Revision Counsel. 26 U.S. Code 1211 – Limitation on Capital Losses Anything above that carries forward indefinitely, but at the same $3,000 annual pace. A $50,000 losing year with no offsetting gains would take close to 17 years to fully absorb. This is the math that makes the 475(f) election so appealing to active traders.
With the Election
Trading losses are ordinary. They can offset your full ordinary income without the $3,000 cap, but they still run into the excess business loss limitation under IRC 461(l), which caps how much business loss can offset non-business income in a single year. The threshold adjusts for inflation. Anything above the cap becomes a net operating loss carried to the following year.7Internal Revenue Service. Excess Business Losses NOLs generally carry forward indefinitely but can only offset 80% of taxable income in a carryforward year.
Deductions Available to Traders
Trader status opens up Schedule C deductions. One thing it does not open up: commissions and other transaction costs. Those get folded into the basis of each trade, reducing gain or increasing loss on that specific transaction, rather than expensed.3Internal Revenue Service. Topic No. 429, Traders in Securities With most major brokers now at zero commission on stocks, this matters less than it once did.
Deductible on Schedule C are things like real-time data feeds and charting software, trading platform fees, education that maintains or improves your trading skills, the business-use portion of your internet and phone service, accountant and tax preparation fees tied to the trading business, and computer and monitor hardware used for trading. A home office qualifies if the space is used exclusively and regularly as your principal place of business. The simplified method allows $5 per square foot up to 300 square feet, capped at $1,500.8Internal Revenue Service. Topic No. 509, Business Use of Home
One more benefit worth naming: gains from selling securities as a trader are not subject to self-employment tax.3Internal Revenue Service. Topic No. 429, Traders in Securities You skip the combined 15.3% Social Security and Medicare hit that other self-employed people pay on net earnings.
Quarterly Estimated Taxes
Day trading income is not withheld. The IRS expects you to pay as you go, and settling up in April can trigger an underpayment penalty charged at the quarterly interest rate on the shortfall.9Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty Quarterly due dates are April 15 for January through March income, June 15 for April and May, September 15 for June through August, and January 15 of the following year for September through December.
You generally avoid the penalty if your total tax owed at filing is under $1,000, or if you have paid at least 90% of the current year’s tax liability or 100% of the prior year’s tax (110% if your AGI exceeded $150,000).9Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty Because trading income swings, the prior-year safe harbor is often the cleanest approach.
Records That Support Your Return
The IRS does not audit based on trading volume alone. It does flag returns that look unusual, and high-volume day traders trip several common wires. Chronic losses on Schedule C are the biggest one. The IRS applies a safe harbor presumption that a legitimate business should show a profit in at least three of five consecutive years; without that, the activity can be reclassified as a hobby and business deductions disallowed. Claiming trader status without the volume to support it is another trigger. Deducting $15,000 of trading expenses against 50 trades in the year is the kind of mismatch automated screening catches.
Keep detailed records of every trade, including date, security, quantity, price, and proceeds. The broker’s 1099-B handles most of that. Separately, keep logs supporting trader status: time spent trading each day, number of trades executed, and average holding periods. Those logs are what you need if the IRS questions the status you claimed.
One Thing That Isn’t a Tax Rule
The FINRA pattern day trader rule flags you if you execute four or more day trades within five business days, provided those trades represent more than 6% of your total trades in a margin account during that period. Once flagged, your margin account must maintain at least $25,000 in equity, and you cannot day trade if the balance drops below that.10FINRA. Day Trading This is a regulatory requirement, not a tax threshold. It controls whether you can keep trading; it does not change how your gains are taxed.