> For the complete documentation index, see [llms.txt](https://docs.txflow.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.txflow.com/perp/trading-rules/margin-tiers.md). # Margin Tiers Margin Tiers define how maximum leverage and maintenance margin requirements scale with position size. Larger positions require lower leverage and higher margin. ### How it works * **Smaller positions** → higher max leverage, lower maintenance margin rate * **Larger positions** → lower max leverage, higher maintenance margin rate This protects both traders and the platform from excessive concentration risk on large positions. As your position size grows, you may move into a higher tier with stricter requirements. ### Maintenance margin calculation ``` Maintenance Margin = Position Notional × MMR ``` Where: * **Position Notional** = `Position Size × Mark Price` * **MMR** = Maintenance Margin Rate (varies by tier — published per market) ### Related Pages

Pages	Description
Position and Order Limit	Limitation of position and placing orders
Order Types and Matching	Market, Limit, and advanced orders and matching mechanics
Liquidation	Detailed liquidation mechanics
Trading Fees	Trading and funding fees

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