Can a broker liquidate my account without asking?

Yes. Margin agreements give brokers the right to liquidate positions without notice to meet margin calls. During fast market moves, they may sell your positions immediately rather than waiting for you to act.

What is the initial vs. maintenance margin?

Initial margin (50% for stocks per Reg T) is required to open a margin position. Maintenance margin (typically 25–30%) is the minimum equity required to hold the position. Most brokers require more than the regulatory minimum.

How much can I borrow on margin?

Regulation T allows you to borrow up to 50% of the purchase price of eligible securities. So $50,000 in cash can control $100,000 in stocks. But borrowing the maximum leaves no buffer — any decline can trigger a margin call.

Is trading on margin a good idea?

Margin amplifies both gains and losses. A 10% gain on a 2:1 leveraged position is 20% on your equity, but a 10% loss wipes out 20%. Most retail investors lose money on margin due to forced liquidations at lows and interest costs (currently 8–12% annually at most brokers).

Margin Call Calculator — Liquidation Price for Margin Accounts | KalkWise

By the KalkWise Editorial Team Reviewed for accuracy Updated June 2026

What is the margin call calculator — liquidation price for margin accounts?

In short

A margin call occurs when your account equity falls below the maintenance margin requirement. If you have a $100,000 account with a $40,000 margin loan and a 25% maintenance requirement, a margin call triggers when the account value drops to $53,333 ($40K ÷ 0.75). That's a 46.7% drop from current value.

Calculates current equity, current equity percentage, and the account value at which a margin call is triggered, plus how far prices can fall before that point.

How to use this calculator

1Enter your current account value (total market value of holdings).
2Enter your margin loan balance (amount borrowed).
3Enter the maintenance margin rate (typically 25% for stocks, set by your broker).

The formula

equity=account value−loan balance

margin call price=loan balance1−maint. rate

Current Equity = V − L; Margin Call Price = L ÷ (1 − m); Drop = V − Margin Call Price

V: — Account value
L: — Margin loan balance
m: — Maintenance margin rate

Worked example

The scenario

$150,000 account value, $60,000 margin loan, 30% maintenance margin.

gives

The result

Current equity = $90,000 (60%). Margin call triggers at $85,714. Account can drop $64,286 (42.9%) before margin call.

Common use cases

Know your downside buffer when trading on margin.
Set stop-loss orders before the margin call level.
Compare risk at different margin loan levels.
Decide whether to reduce margin before volatile events (earnings, Fed meetings).

Limitations & assumptions

Maintenance margin rates vary by broker and security (stocks, ETFs, options have different requirements).
Concentrated positions may have higher margin requirements than diversified portfolios.
Brokers can change maintenance requirements without notice during volatile markets.
Liquidation may happen at unfavorable prices if the market moves quickly.

Frequently asked questions

Your broker notifies you (by email, app, or call) that your equity is below maintenance margin. You must deposit cash, deposit securities, or sell positions to restore your equity above the requirement — typically within 2–5 business days, though some brokers liquidate immediately.

Disclaimer: KalkWise calculators are provided for general informational and educational purposes only and do not constitute financial, investment, tax, or legal advice. Results are estimates based on the figures you enter and the assumptions described above. Actual outcomes will vary. Consult a qualified professional before making financial decisions.

Margin Account Details