Depositing Collateral

Last updated: Jun 3, 2026

Supported collateral

Synthetix Exchange runs on Ethereum Mainnet. USDT and WETH deposits are supported in the app today. Additional collateral types in the table below are planned.

Asset	Status	Contract address (Mainnet)
USDT	Supported today	`0xdAC17F958D2ee523a2206206994597C13D831ec7`
WETH	Supported today	`0xC02aaA39b223FE8d0a0e5c4f27ead9083c756cc2`
cbBTC	Planned	`0xcbB7C0000aB88B473b1f5aFd9ef808440eed33Bf`
sUSDe	Planned	`0x9D39A5DE30e57443BfF2A8307A4256c8797A3497`
wstETH	Planned	`0x7f39C581F595B53c5cb19bD0b3f8dA6c935E2Ca0`

USDT is valued at full face value for deposits. Non-USDT assets such as WETH have a haircut applied, meaning their effective collateral value is less than their market value.

What you need before depositing

A supported wallet connected to Ethereum Mainnet
One of the supported collateral assets in your wallet
A small amount of ETH for gas (Ethereum Mainnet gas fees apply)

How to deposit

Go to exchange.synthetix.io and connect your wallet
Select the subaccount you want to deposit into (or create one)
Click Deposit
Select the collateral asset and enter the amount
If this is your first deposit with that asset, approve the token spend (one-time)
Confirm the deposit transaction in your wallet

Once the transaction is confirmed on Ethereum Mainnet (typically 12–15 seconds), your balance updates in the app.

Getting assets on Ethereum Mainnet

If you hold assets on another network or at a centralised exchange, you need to move them to Ethereum Mainnet first.

From another chain:

Base Bridge - for assets on Base
Stargate - cross-chain USDT
Superbridge - Optimism → Mainnet

From a CEX: Most major exchanges (Binance, Coinbase, Kraken) support direct Ethereum Mainnet withdrawals. Choose "ERC-20" or "ETH Network" when withdrawing.

Minimum deposit

The deposit flow may show a minimum deposit per asset. Very small deposits may also not cover gas costs for subsequent trading transactions.

Deposit limits

Per-asset minimum deposits, maximum account deposits, and other limits are shown in the deposit flow when they apply. Protocol-level TVL limits may apply during early deployment phases; the app surfaces any active limits.