In this guide
What Is the Minimum Deposit on Polymarket?
Polymarket has no enforced minimum deposit. In theory, you can deposit $1 in USDC and place a trade. In practice, gas fees on Polygon are so low (under $0.02) that even small deposits are economical. Most new traders start with $20–$100 to keep transaction costs proportionally small.
Practical Minimum: What You Actually Need
While there is no technical minimum, consider these practical costs:
- Exchange withdrawal to Polygon: ~$0.50–2 (variable by exchange)
- Polygon gas per trade: ~$0.003–0.02
- Exchange fee on GBP → USDC: ~0.5–1.5%
With these costs in mind, depositing less than $10 means transaction overhead eats a significant percentage of your capital. A starting balance of $50–$100 is where Polymarket becomes genuinely cost-efficient for UK traders.
Minimum Trade Size
The minimum trade size on Polymarket is $1 per market outcome. However, most liquid markets have a practical minimum of $5–10 to get meaningful fills at a competitive price.
Is There a Maximum Deposit?
Polymarket imposes no maximum deposit. Institutional and professional traders regularly hold five- and six-figure positions. USDC on Polygon is your only limit — there is no casino-style "maximum stake" restriction.
Tips for First-Time UK Depositors
- Use Coinbase UK for your first GBP → USDC purchase (FCA-registered, fast Faster Payments)
- Always send USDC on the Polygon network, not Ethereum
- Start with a small test transaction before moving a larger amount