Understanding the mechanics behind margin requirements is essential for any trader engaging in leveraged positions. At the core of risk management lies the maintenance margin ratio, a critical metric that determines whether your positions remain open or face forced liquidation. This guide breaks down how tiered maintenance margin ratios work, how they're calculated across different account modes, and what happens when your equity dips too low.
What Is a Maintenance Margin Ratio?
The maintenance margin ratio represents the minimum level of equity you must maintain to keep your leveraged positions active. When this ratio drops to 100% or below, your account triggers an automated forced liquidation process. At this point, your equity equals or falls below the required maintenance margin plus any applicable fees.
Liquidation involves one or more actions: order cancellation, partial position closure, or full liquidation—depending on your account settings and market conditions.
👉 Discover how to optimize your margin usage and avoid unexpected liquidations.
It’s important to note that you are fully responsible for monitoring your positions and ensuring sufficient margin is maintained at all times.
How Maintenance Margin Requirements Are Determined
Maintenance margin isn’t a fixed value—it dynamically adjusts based on several factors:
- Your adjusted equity (total account value including unrealized P&L)
- The account mode you're using (isolated, cross, portfolio margin)
- Your position size, which determines your placement within tiered risk levels
These variables combine to determine both your required margin and maximum allowable leverage.
Account Mode Differences
Different account structures calculate maintenance requirements uniquely:
Isolated Margin
Each position is evaluated independently. The system multiplies the position value by its specific maintenance margin rate. If that individual position falls below the threshold, only it is at risk of liquidation.
Cross Margin (Spot & Futures)
All positions across the same asset are grouped. The total margin requirement is calculated collectively, spreading risk across multiple trades. This includes combining contracts with different expiration dates for the same underlying crypto.
For example: Holding 1,000 BTC weekly futures + 500 bi-weekly + 500 quarterly + 500 bi-quarterly = 2,500 total contracts → places you in Tier 2 for BTC.
Multi-Currency Cross Margin
Similar to cross margin but includes multiple cryptocurrencies as collateral. Adjustments are made based on each asset's discount rate and liquidity profile.
Portfolio Margin Mode
Instead of fixed maintenance rates, this advanced mode uses stress-test scenarios to simulate worst-case losses. The required margin reflects potential drawdowns under extreme market volatility.
Position Tiers: Scaling Risk with Size
To manage systemic risk, especially with large traders, OKX employs a tiered maintenance system. As your position size increases, so does the required maintenance margin—and your maximum leverage decreases accordingly.
This structure helps prevent sudden market shocks caused by mass liquidations of oversized positions. It ensures smoother price action during volatile periods and protects overall market stability.
Why Tiering Matters
- Larger positions → Higher maintenance requirements
- Increased exposure → Lower maximum leverage
- Enhanced platform safety → Reduced cascading liquidation risks
OKX reserves the right to adjust tier thresholds at any time for risk management purposes. Additionally, users are prohibited from circumventing tier limits by using multiple accounts to concentrate positions in the same trading pair. Such behavior may result in immediate intervention, including forced position closure.
Liquidation Fees and Clearance Costs
When liquidation occurs, two types of fees typically apply:
1. Liquidation Taker Fee
This fee covers the execution cost of closing your position. It’s calculated using your current taker fee rate based on your trading tier.
For options, the liquidation fee includes:
- Your standard taker fee rate
- Plus 12.5% of the option premium
2. Liquidation Clearance Fee
An additional fee applied to cover slippage and losses due to adverse market movements during liquidation. These funds go directly into the insurance fund, helping protect other users from clawbacks during extreme events.
Spot & Margin Liquidation Clearance Fee Breakdown:
- Isolated Mode:
Liabilities = |Liability Amount| × (Tier Maintenance Requirement / Tiered Rate) - Cross-Margin Mode:
Liabilities = |Liability Amount| × Tier Maintenance Requirement Multi-Currency & Portfolio Mode:
- Assets/liabilities in non-USDT pairs incur progressive fees based on discount gradients.
- USDT-denominated liabilities are exempt from clearance fees.
- Asset-side liquidations prioritize high-discount-rate cryptos.
Futures Clearance Fee Calculation:
- Crypto-Margined:
Face Value × Contract Multiplier × Positions Liquidated / Mark Price × Tier Requirement - USDT-Margined:
Face Value × Contract Multiplier × Positions Liquidated × Mark Price × Tier Requirement
Options Clearance Fee (Portfolio Margin):
- Call Option:
C × Margin Factor × Number of Positions - Put Option:
Max(C, C × Option Mark Price) × Margin Factor × Number of Positions
(Where C = Configuration Item)
The Forced Liquidation Process
Once your maintenance margin ratio hits 100% or lower, OKX initiates automatic risk control measures:
- All new margin-requiring orders are canceled or rejected.
- The system takes over the highest-margin-consuming position.
- The insurance fund may be used to cover initial losses—though no guarantee is made about full loss recovery.
👉 Learn how the insurance fund protects traders during volatile markets.
Isolated & Cross-Margin Liquidation Flow
- Liability is assessed per position tier.
- The system collects assets to repay debt, applying clearance fees accordingly.
Multi-Currency & Portfolio Mode
- Non-USDT Liabilities: System prioritizes settling liabilities first, starting with most liquid assets.
- USDT Liabilities: Focus shifts to asset-side liquidation, reducing holdings progressively from highest to lowest liquidity and applying currency-specific discount rates.
Frequently Asked Questions (FAQ)
Q: What happens when my maintenance margin ratio reaches 100%?
A: Your account triggers forced liquidation. Orders requiring additional margin will be rejected, and positions may be partially or fully closed.
Q: Can I avoid liquidation after hitting 100%?
A: No—once reached, the process begins automatically. You cannot manually intervene or delay it.
Q: Are liquidation fees refundable?
A: No. Both liquidation taker and clearance fees are final and contribute to risk mitigation systems like the insurance fund.
Q: How often are position tiers updated?
A: OKX may update tiers at any time based on market conditions and risk assessments. Users should monitor announcements regularly.
Q: Does portfolio margin use the same tier system?
A: While it considers position size, portfolio margin relies more on stress-test simulations than fixed tiers for calculating required margins.
Q: Why does OKX charge a clearance fee?
A: To cover slippage and losses during fast-moving markets, ensuring fair outcomes and protecting the broader user base.
Final Notes on Risk Management
Trading leveraged products—including futures, margin, and options—carries significant risk. Prices can swing rapidly, amplifying both gains and losses. You could lose more than your initial deposit.
Always assess your financial situation before opening leveraged positions. Never invest money you can't afford to lose.
👉 Stay ahead with real-time margin analytics and smart risk alerts.
This article serves informational purposes only and does not constitute financial, legal, or tax advice. Product availability varies by region. For full details, review the OKX Terms of Service and Risk Disclosure documents.