How to Deposit on Polymarket: Step-by-Step Guide (2026)
April 2026 · 7 min read · For new and returning users
What You Need to Deposit on Polymarket
Polymarket is a decentralized platform — there is no bank account or Paypal integration. All funds are held in USDC (USD Coin), a stablecoin pegged to the US dollar, on the Polygon blockchain.
To deposit, you need one of:
- A crypto wallet (MetaMask, Coinbase Wallet, Rainbow, etc.) with USDC on Polygon
- A Coinbase or Kraken account to buy and send USDC directly
- A credit/debit card — Polymarket has a built-in card onramp via MoonPay/Stripe
Method 1: Deposit via Credit/Debit Card (Easiest)
This is the simplest method for new users. Polymarket has a built-in fiat onramp that converts your card payment to USDC automatically.
- Go to polymarket.com and click Sign Up
- Connect with email, Google, or create a wallet (Polymarket creates one for you)
- Click Deposit in the top right corner
- Select Buy with card
- Enter the amount in USD ($10 minimum typically)
- Complete the card payment via MoonPay or Stripe (you may need to verify ID)
- USDC arrives in your Polymarket account within 1–5 minutes
Fees: Card onramp fees are typically 2–3.5% via MoonPay/Stripe. On a $100 deposit, you pay $2–3.50 in conversion fees.
Method 2: Deposit from Coinbase (Recommended for Regular Traders)
Coinbase allows you to send USDC on Polygon directly to your Polymarket wallet with minimal fees.
- Open Coinbase (app or web)
- Buy USDC with your bank account or card (USDC purchases on Coinbase are typically free)
- Click Send on your USDC balance
- Select network: Polygon (important — not Ethereum, not Arbitrum)
- In Polymarket, go to Deposit → Copy your wallet address
- Paste your Polymarket wallet address into Coinbase
- Confirm and send. Arrives in 1–3 minutes.
Method 3: Deposit via MetaMask Wallet
If you already have MetaMask set up with USDC on Polygon, you can connect it directly to Polymarket.
- Make sure MetaMask is on Polygon network (not Ethereum)
- Ensure you have USDC in your MetaMask on Polygon
- Go to polymarket.com → click Connect Wallet
- Select MetaMask and approve the connection
- Click Deposit → choose USDC amount → approve the transaction
- Gas fees on Polygon are typically $0.01–0.05 per transaction
Setting up Polygon network in MetaMask
If Polygon doesn't appear in MetaMask's network dropdown:
- Open MetaMask → Settings → Networks → Add Network
- Click "Add a network manually"
- Network name: Polygon
- RPC URL: https://polygon-rpc.com
- Chain ID: 137
- Symbol: MATIC
- Block explorer: https://polygonscan.com
- Save and switch to Polygon network
Method 4: Bridge USDC from Ethereum to Polygon
If you have USDC on Ethereum mainnet (from an old wallet or exchange withdrawal), you need to bridge it to Polygon before depositing to Polymarket.
- Go to bridge.polygon.technology (official Polygon bridge)
- Connect your wallet
- Select USDC → choose amount → bridge to Polygon
- Confirm in MetaMask (requires ETH for gas — typically $2–10)
- Wait 7–10 minutes for the bridge to complete
- Once on Polygon, deposit to Polymarket as described in Method 3
Note: Bridging costs Ethereum gas fees ($2–15 depending on network congestion). For small amounts, it is more efficient to buy USDC on Polygon directly from Coinbase or use the Polymarket card onramp.
Minimum Deposit Amount
Polymarket has no enforced minimum deposit for crypto wallet deposits. You can technically deposit $1 in USDC. However:
- Card onramps typically have a minimum of $10–20
- Transaction fees make very small deposits ($1–5) economically inefficient
- Most serious traders start with at least $50–100 to have meaningful position sizing
- The minimum bet on most Polymarket markets is $1
Deposit Fees Comparison
| Method | Deposit Fee | Speed | Complexity |
|---|---|---|---|
| Credit/debit card (MoonPay) | 2–3.5% | 1–5 min | Easy |
| Coinbase → Polygon USDC | ~0% (Coinbase free) | 1–3 min | Easy |
| MetaMask (USDC on Polygon) | ~$0.01 gas | 30 sec | Medium |
| Bridge from Ethereum | $2–15 ETH gas | 7–15 min | Hard |
| Kraken → Polygon USDC | ~0% | 2–5 min | Easy |
How to Withdraw from Polymarket
Withdrawals are the reverse of deposits:
- Go to Polymarket → click your balance → Withdraw
- Enter your external wallet address (MetaMask, Coinbase, etc.)
- Confirm the transaction (small Polygon gas fee ~$0.01)
- USDC arrives in your wallet in under 1 minute
- From there, sell USDC for fiat on Coinbase, Kraken, or Binance
Polymarket withdrawals are instant — there is no lock-up period or withdrawal queue. This is one of Polymarket's major advantages over traditional platforms.
Common Deposit Problems and Fixes
| Problem | Cause | Fix |
|---|---|---|
| Funds sent, not showing in Polymarket | Wrong network (Ethereum instead of Polygon) | Bridge your USDC from Ethereum to Polygon via bridge.polygon.technology |
| Transaction failed | Insufficient MATIC for gas | Buy a small amount of MATIC (~$0.50) on Coinbase, send to your Polygon wallet |
| Card payment declined | Bank blocking crypto purchase | Try a different card, or use Coinbase instead |
| KYC required for large deposits | MoonPay compliance threshold | Complete identity verification in MoonPay, or switch to crypto-to-crypto method |
| Wrong USDC version (ERC-20 vs Polygon) | Sent Ethereum USDC to Polygon address | Bridge via bridge.polygon.technology |
Do You Need MATIC for Gas?
Yes — when interacting with Polymarket from a MetaMask wallet, you need a tiny amount of MATIC (Polygon's native token) to pay gas fees. This is typically $0.01–0.05 per transaction.
If you are using Polymarket's built-in wallet (created during signup), they handle gas fees for you using a gas-free meta-transaction system — you do not need MATIC in that case.
If you are using MetaMask, buy $1–2 of MATIC on Coinbase and send it to your Polygon wallet address — this covers hundreds of transactions.