Polymarket Leverage Tiers: Why Your Margin Requirement Grows as Your Position Gets Bigger
You sized a position at 20x leverage, added to it — and your margin requirement per contract went up, not down. That’s leverage tiering: the headline “up to 20x” applies only to the first band of position size. Bigger positions get lower maximum effective leverage, in steps. Every leveraged trader should understand this before scaling, because it changes the math of adding to winners.
Why does my margin go up as my position grows?
Because maximum leverage is tiered by position size. Instruments define size bands; each band caps the effective leverage allowed at that size. Below the first threshold you can run the headline maximum (up to 20x on crypto, SP500, oil, gold, and silver; up to 10x on other RWA instruments). As your position crosses into larger bands, the allowed leverage steps down — so the margin the engine reserves per contract steps up. The design is standard futures-exchange risk management: notional exposure is what threatens the book, so bigger exposure carries more collateral per unit. See margin modes for how this interacts with cross vs isolated.
A worked example with round numbers
Say an instrument’s tiers are: ≤10 contracts → 20x; ≤25 → 10x; ≤50 → 5x. With 10 contracts at 20x, margin is 10 × (price/20). Add 5 contracts and your 15-contract position now falls in the 10x band: the engine requires margin at 15 × (price/10) — your per-contract margin doubled even though leverage “didn’t change.” Adding the wrong-size increment can push your whole position into a worse band, not just the new contracts.
How to plan around tiers
- Check the instrument’s tier table before sizing — fetch it from instrument info (the API guide shows where).
- Size to the band boundary, not past it. The last contract that crosses a threshold costs the most.
- Remember the worst-case check: resting orders count toward position size for margin purposes — laddered buys can land you in a worse tier before any fill, see why orders get rejected.
- Recheck funding at the new size — bigger positions pay more absolute funding; project it with the funding forecaster before adding.
The interaction with liquidation
Tiers change your liquidation distance when you scale: in a lower- leverage band your maintenance margin per contract rises, so the price move your position can absorb shrinks more than size alone implies — the liquidation mechanics walk the full buffer calculation. Practical rule: after any size increase, recompute liquidation distance from scratch; don’t assume the old number still holds.
FAQ
What is the maximum leverage on Polymarket Perps? Up to 20x on crypto, SP500, oil, gold, and silver; up to 10x on other RWA instruments — subject to position-size tiers, so the maximum applies to smaller bands and steps down as size grows.
Why did my margin requirement increase after adding to my position? Position-size tiering: crossing into a larger band lowers the maximum effective leverage for the whole position, raising required margin per contract — including on the contracts you already held.
How do I see the leverage tiers for an instrument? Instrument info in the API lists size bands and allowed leverage per band; the web app shows the effective leverage for your current size when you open the ticket — see fetching instrument data.
Do resting orders count toward leverage tiers? Yes — the worst-case margin check treats position plus resting orders as potential size, so a ladder of buys can push you into a worse tier before fills happen. Cancel stale orders to shed the phantom size.
Does tiering apply to cross margin too? Tiering is per instrument by size; cross margin changes how collateral is shared across positions, not the tier schedule itself — some instruments are isolated-only regardless. See margin modes explained.
Educational content, not financial advice. Tier schedules are examples — check live instrument data. Not affiliated with Polymarket. Last updated October 2026.
