This is not investment advice. The information provided is for educational and informational purposes only and does not constitute a recommendation to buy or sell any financial product.
A margin account lets you borrow from your broker to trade more than your cash. The leverage is useful, the costs and risks are real. The key facts: you pay interest on the borrowed amount, the broker can demand additional collateral if the position drops, and the regulator limits how much you can borrow.
This article is a practical view of margin accounts — how they work, what they cost, what the risks are, and when to use them.
How a margin account works
In a cash account, you can only buy stocks with the cash in your account. In a margin account, the broker lends you up to a regulatory limit (50% of the purchase price in the US), and you can buy more stock with the same cash.
Example: a $50,000 cash account. In a margin account, you can buy up to $100,000 of stock. The $50,000 you don't have is borrowed from the broker, secured by the stock you bought.
The stock you bought is the collateral. If the stock price drops, the broker may demand additional collateral. If you can't provide it, the broker can sell the stock to recover the loan.
What it costs
The cost of a margin loan is the interest rate, typically 6-12% per year for most retail brokers in 2026. The rate depends on the broker, the loan size, and the prevailing base rate (Fed funds, ECB rate, etc.).
Some brokers tier the rate:
- $0-25,000 borrowed: 9-10%
- $25,000-100,000: 8-9%
- $100,000-1M: 7-8%
- $1M+: 6-7% (negotiable)
The interest is charged monthly on the average borrowed amount. A $50,000 margin loan at 8% for a year costs $4,000 in interest, or about $333 per month. The interest is a real drag on returns. A 2× leveraged position needs to outperform the unleveraged position by more than the interest cost for the leverage to add value. At 8% interest, the leveraged position needs to return 16% (vs 8% unleveraged) just to break even on the carry.
What can go wrong
Three main risks:
1. Margin call
If the value of your account drops below the broker's maintenance margin requirement (typically 25-30% of the position value for stocks), the broker issues a margin call. You must deposit additional cash or sell positions to bring the account back to the requirement.
The timeline is usually 1-3 business days. If you don't meet the call, the broker can close positions at the current market price. The risk: in a fast market decline, the broker may close positions at the worst possible price, locking in a loss that exceeds the original margin call amount.
2. Forced liquidation at the worst time
A margin call during a volatile market is a worst-case scenario. The position is closed when prices are moving fast, and the slippage can be significant. The fix: keep the account well above the maintenance margin requirement — at least 50% equity, not the 25-30% minimum.
3. Interest cost exceeds the leverage benefit
For a buy-and-hold position, the annual interest cost can exceed the additional return from the leverage. A $50,000 cash position returning 10% gives a $5,000 gain. A $100,000 leveraged position returning 10% minus $4,000 in interest gives a $6,000 net. The leverage added 20% to the gross return but cost 80% in interest. For most long-term positions, the math doesn't work.
When margin makes sense
Three scenarios where margin is appropriate:
- Short-term tactical trades. A trader who plans to hold a leveraged position for 2-4 weeks. The interest cost is small (a few percent of the position), and the leverage magnifies the return. The position is closed before the interest cost accumulates.
- Hedging. A trader with a long stock position who wants to add a hedge. The margin lets the trader run the hedge without selling the long position.
- Short selling. Margin accounts are required for short selling in most jurisdictions.
Margin is not appropriate for long-term buy-and-hold investing (interest cost erodes returns), for concentrating a position (leverage amplifies concentration), or for holding through volatile periods (margin call risk).
Regulatory limits
The regulatory limit on margin borrowing is set by the central regulator in each jurisdiction:
- US (FINRA). 50% of the purchase price for most stocks. 25% maintenance margin.
- EU (ESMA). Varies by instrument, typically 25-50% of the position value. ESMA has been progressively tightening retail leverage since 2018.
- UK (FCA). Similar to ESMA, with additional rules for retail.
- Australia (ASIC). Stricter rules for retail since 2021. 25-50% margin for most retail positions.
- Asia (varies). Hong Kong, Singapore, Japan each have their own frameworks.
The broker may apply higher margin requirements than the regulatory minimum, especially for volatile or low-cap stocks.
How to evaluate
When deciding whether to use margin, ask:
- What's the holding period? (Days to weeks: margin can be cost-effective. Months to years: the interest cost is too high.)
- What's the volatility of the position? (High-volatility positions have higher margin call risk.)
- What's the expected return? (If the expected return is below the interest cost, the leverage is destroying value.)
- What's the concentration? (Margin amplifies concentration. A 30% concentration with 2× leverage is a 60% effective position.)
- What's the liquidity? (Low-liquidity positions are hard to exit at the right price. Margin amplifies the exit cost.)
The decision is mechanical: if the expected return on the leveraged position exceeds the interest cost and the position sizing is within your risk tolerance, margin is appropriate. Otherwise, it's a temptation.
Common mistakes
Three patterns:
- Using the full margin limit because it's available. The regulatory limit is not a target. The right amount of margin is what the strategy calls for.
- Adding to a losing margin position. Averaging down increases the loss and the interest cost. The position should be cut, not added to.
- Ignoring the interest cost in the return calculation. A leveraged position that returns 6% with 8% interest is a net loss.
FAQ
How much can I borrow on margin?
In the US, the regulatory limit is 50% of the purchase price for most stocks. So a $50,000 cash account can buy up to $100,000 of stock, borrowing $50,000.
What's the typical margin interest rate?
In 2026, the typical rate is 6-12% per year for retail accounts, depending on the broker and the loan size.
What happens if I can't meet a margin call?
The broker will close some or all of your positions to bring the account back to the maintenance margin requirement. The broker doesn't need your permission, and the position closures are at market prices.
Is margin trading risky?
Yes, but the risk is manageable. The risk comes from the combination of leverage, concentration, and volatility. The fix is position sizing, not avoiding margin entirely.
Related resources
Where to start
If you want to use margin, set explicit position size limits and interest cost budgets before placing the trade. See our broker table for the current list of margin-friendly platforms.