Day trading in the U.S. is governed by a layered set of rules from FINRA, the SEC, the CFTC, the IRS, and individual brokers. Most "day trading rules" articles cover only the Pattern Day Trader rule, which is just one of about a dozen rules that affect active traders. This guide covers them all, organized by which authority enforces what, and when each rule actually matters.
Quick map: FINRA owns the Pattern Day Trader rule and margin rules for stocks/options. The SEC owns settlement rules (T+2 stocks, T+1 futures). CFTC/NFA own futures margin requirements but have no PDT-equivalent. The IRS owns tax treatment (60/40 for futures vs ordinary income for stocks). Each broker layers its own internal limits on top.
FINRA Rules (Stocks/Options)
1. Pattern Day Trader (PDT) Rule — $25,000 minimum
The big one. If you make 4+ day trades within 5 consecutive business days in a margin account, FINRA flags you as a Pattern Day Trader. PDT-flagged accounts must maintain $25,000 in equity at all times. Below threshold, you're restricted to 3 day trades per rolling 5-business-day window or face account restrictions.
Doesn't apply to: cash accounts, futures, crypto.
2. Regulation T (Reg T) — 50% initial margin
For stock purchases on margin, you must put up 50% of the position value initially. The other 50% is borrowed from the broker. After purchase, maintenance margin (FINRA minimum 25% of position value) applies — equity below that triggers a margin call.
3. Day Trading Buying Power (DTBP) — 4x equity
PDT-flagged accounts get 4x intraday buying power on equity above $25K. So $25K of equity = $100K of intraday buying power. Trades opened intraday must be closed by end of day or they convert to overnight positions subject to standard 2:1 margin.
4. Margin Call Equity Maintenance
If equity drops below 25% of position value (FINRA minimum), broker issues a margin call requiring deposit or position liquidation within typically 3-5 business days.
SEC Settlement Rules
5. T+2 Settlement on Stocks
When you sell stock, the cash from the sale settles in your account 2 business days later. In a cash account, you cannot use unsettled cash for new purchases without violating the "free riding" rule. This effectively limits cash-account day trading.
6. T+1 Settlement on Options
Options settle the next business day. Faster than stock settlement.
CFTC / NFA Rules (Futures)
7. Futures Margin Requirements (No PDT)
Futures contracts have CFTC-set margin requirements per contract but no PDT-equivalent rule. ES initial margin ~$13,800 overnight, $400-$1,200 day-trading margin (broker dependent). Micro contracts (MES, MNQ) require ~$50-$200 day-trading margin per contract.
8. T+1 Futures Settlement
Futures contracts that don't physically settle (cash-settled) clear T+1. ES, NQ, and most index futures are cash-settled. Faster than stocks' T+2.
IRS Tax Rules
9. Short-term Capital Gains (Stocks)
Stock day trading profits are short-term capital gains taxed at ordinary income rates (10-37% federal). No preferential treatment.
10. 60/40 Tax Treatment (Futures Section 1256)
Futures and Section 1256 contracts receive automatic 60/40 split — 60% long-term capital gains rate, 40% short-term — regardless of holding period. For high-bracket traders, this saves 5-15% in taxes vs stock day trading.
11. Trader Tax Status (TTS) Election
Active traders meeting IRS criteria (substantial activity, regular pattern, intent to profit from short-term moves) can elect Trader Tax Status. Benefits: ordinary loss treatment (vs $3K capital loss limit), business expense deductions, mark-to-market accounting election.
12. Wash Sale Rule
Selling a security at a loss and repurchasing within 30 days disallows the loss for tax purposes. Applies to stocks and options. Futures are exempt due to mark-to-market treatment under Section 1256.
Broker-Specific Limits
On top of regulatory rules, each broker has its own:
- Position size limits per account — Robinhood limits crypto positions, some brokers cap penny stock exposure
- Approval levels for options trading (Level 1-4)
- Margin requirements often higher than FINRA minimums
- Volatile-stock margin holds on names like NVDA, TSLA during high volatility
- Halts and review periods on rapid trading patterns
Stocks vs Futures: Day Trading Rules Comparison
| Rule | Stocks | Futures |
|---|---|---|
| Min equity to day trade | $25,000 (PDT) | None |
| Day trades per week limit | 3 (under $25K) | Unlimited |
| Settlement | T+2 | T+1 |
| Initial margin | 50% (Reg T) | $50-$13,800 per contract |
| Tax treatment | Short-term capital gains | 60/40 (Section 1256) |
| Wash sale rule | Applies | Exempt |
| Hours | 9:30am-4pm ET | 23-hour markets |
The Practical Implication
For active day traders, futures markets are structurally simpler and more tax-efficient than stocks. The PDT rule is the single biggest reason traders move from stocks to futures, but the secondary benefits compound: better tax treatment, longer hours, faster settlement, no wash sale headache.
Common Day Trading Rule Misconceptions
"I just won't trade margin and PDT goes away"
Cash accounts are PDT-exempt but T+2 settlement is more restrictive than PDT for active trading.
"PDT is per-trader, so multiple brokers fix it"
Each broker tracks PDT independently. Splitting accounts works tactically but the SEC has flagged the practice and brokers can cross-reference.
"All day trading profits are short-term capital gains"
True for stocks. Futures get 60/40 automatically. Big difference for high-volume traders.
"I need to declare TTS to use mark-to-market"
TTS election and Mark-to-Market are separate. You can have one without the other. M2M is irrevocable once elected, so think carefully.
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What are the main day trading rules?
PDT ($25K min for stocks), T+2 settlement, Reg T margin, broker limits, IRS short-term capital gains. Futures bypass most of these.
What is the $25K rule?
Pattern Day Trader rule: 4+ day trades per 5 business days in margin accounts requires $25K equity minimum.
Do futures have day trading rules?
Margin requirements per contract but no PDT-equivalent. Unlimited day trades regardless of account size.
How are day trading profits taxed?
Stocks: short-term capital gains at ordinary rates. Futures: 60/40 (Section 1256) regardless of holding period.
What is T+2 settlement?
Stock sales take 2 business days to clear cash. Limits cash-account day trading.
Can I day trade with $500?
Stocks: limited via cash accounts. Futures: yes, via Micro contracts ($50-$200 margin) or prop firm funded accounts ($0 personal capital).
Bottom Line
U.S. day trading rules are a stack: FINRA + SEC + CFTC + IRS + broker. Stock day traders deal with all of them. Futures day traders skip PDT, get faster settlement, get 60/40 tax treatment, and avoid wash sale issues. For active traders without $25K, futures is the structurally cleaner choice.
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