Fastest method: PolyGram + Visa/Mastercard debit card → funds available in under 5 minutes. For larger amounts: Coinbase UK bank transfer (Faster Payments) → USDC → PolyGram wallet. Klarna is available as a buy-now-pay-later option via PolyGram's payment flow.
Depositing into Polymarket from the UK requires converting GBP to USDC (the platform's native currency) and sending it to a Polygon wallet. This guide covers every UK Polymarket deposit method available in 2026, including fees, speeds, and which is best for different deposit sizes.
Method 1 — PolyGram Debit Card (Fastest)
How it works: PolyGram accepts Visa and Mastercard debit cards directly. Your GBP is converted to USDC and sent to your PolyGram account automatically.
- Speed: 2–5 minutes
- Minimum: £5
- Fees: ~1.5% card processing fee (included in the exchange rate displayed)
- Best for: amounts under £200, quick top-ups
- Limits: Standard card limits apply (£500–£1,000 per transaction with most UK banks)
Method 2 — PolyGram via Klarna (Buy Now, Flexible Payment)
PolyGram offers Klarna as a payment option for UK users at checkout:
- Klarna Pay Later (30 days): Purchase USDC now, pay within 30 days — 0% interest
- Klarna Pay in 3: Split payment into 3 equal instalments over 60 days
- Availability: Klarna requires a UK billing address and soft credit check
- Fees: Klarna charges no interest on Pay Later/Pay in 3; standard exchange rate applies
- Limits: Typically £30–£1,500 per transaction (Klarna credit decision)
Note: Klarna purchases of USDC for prediction market use should be treated as any other financial obligation — only use funds you can afford if the position doesn't pay out.
Method 3 — Coinbase UK Bank Transfer (Lowest Fees)
For UK users depositing larger amounts, this is the most cost-effective route:
- Open a Coinbase UK account (FCA-registered) — takes 10 minutes with Yoti ID verification
- Link your UK bank account via Open Banking or Faster Payments
- Buy USDC with GBP — fee ~1.49% via Coinbase Advanced, ~0.5% via Coinbase Pro
- Send USDC to Polygon network (ensure you select Polygon/MATIC network, not Ethereum)
- Import the wallet address to PolyGram or use MetaMask
Total fees: ~0.5–1.5% depending on Coinbase tier. Speed: 10–30 minutes. Best for: deposits over £200.
Method 4 — Kraken UK Bank Transfer
Kraken is FCA-registered and popular with UK crypto users:
- UK Faster Payments bank transfer — free deposit, credited within 2 hours
- Buy USDC (Maker fee: 0.16%, Taker: 0.26%)
- Withdraw to Polygon network — minimal network fee (~$0.01)
- Best for: existing Kraken users, large amounts (£1,000+)
Method 5 — Revolut to PolyGram
Revolut offers crypto purchasing in the UK and is popular with prediction market traders:
- Buy USDC in Revolut — standard exchange rate + 0.5–2.5% Revolut markup
- Send to PolyGram Polygon wallet address
- Note: Revolut UK crypto is custodial — ensure you're sending from Revolut to an external wallet
UK Bank Transfer Fees Comparison
| Method | Deposit Fee | USDC Buy Fee | Speed | Minimum |
|---|---|---|---|---|
| PolyGram debit card | ~1.5% | Included | 2–5 min | £5 |
| PolyGram Klarna | 0% | Included | Instant | £30 |
| Coinbase UK (bank) | Free | 0.5–1.49% | 10–30 min | £1 |
| Kraken UK (bank) | Free | 0.16–0.26% | 2–4 hours | £10 |
| Revolut | Free | 0.5–2.5% | 5–15 min | £1 |
What UK Banks Block Crypto Purchases?
Some UK banks restrict credit/debit card purchases of crypto. Current status (June 2026):
- Allow: Monzo, Starling, Chase UK, Halifax (most purposes), Lloyds, Barclays debit
- Restrict or block: HSBC (credit cards only), Santander (variable), NatWest (some restrictions)
- Workaround: Use bank transfer instead of card if your bank restricts cards for crypto
Withdrawing Back to GBP (UK Bank)
To withdraw winnings back to your UK bank:
- Withdraw USDC from PolyGram to your USDC wallet
- Send to Coinbase UK or Kraken
- Sell USDC for GBP
- Withdraw GBP via Faster Payments — arrives same day (usually under 2 hours)
Total withdrawal time: 30 minutes to 2 hours. Fees: ~0.5% exchange + £0 bank transfer.
FAQ — Polymarket Deposit UK
- Can I deposit with PayPal on Polymarket UK?
- Not directly. PayPal UK does not support sending funds to crypto platforms. You would need to transfer from PayPal to your bank, then use a bank transfer method to buy USDC.
- Is Klarna safe for buying USDC?
- Klarna is an FCA-regulated payment provider. The transaction is as safe as any other Klarna purchase. Ensure you only use funds you can repay within the agreed period regardless of trading outcomes.
- What is the maximum I can deposit?
- PolyGram card deposits are limited by your card issuer (typically £500–£1,000 per transaction). For larger amounts, use a crypto exchange bank transfer — Coinbase and Kraken support deposits of £50,000+ with Enhanced Verification.