How to Deposit to Kast Card: Pick the Right Chain, Save 10x on Fees [2026]
Key Takeaways
- Kast Card deposits work via on-chain crypto transfers — supports USDC, USDT, SOL, ETH, BTC
- Solana: $0 gas, 0.1% conversion fee, arrives in 5–30 seconds — best option for everyone
- Ethereum: ~$8 gas fee — avoid unless you have no other choice
- Standard flow: buy USDC on an exchange (Solana network) → send to Kast
- ACH bank transfer available for US bank accounts only
- KYC takes 10–30 minutes — passport + face verification
Supported Deposit Methods
Kast Card offers two deposit paths: on-chain crypto transfer and ACH bank transfer. Most users outside the US will use on-chain deposits. Supported assets include USDC, USDT, SOL, ETH, and BTC, but fees vary dramatically depending on which chain you pick.
| Chain | Gas Fee (approx.) | Kast Conversion Fee | Best For |
|---|---|---|---|
| Solana | $0 | 0.1% | Everyone — top pick |
| Arbitrum | $0.20 | 0.1% | Users with ARB assets |
| Base / Optimism | $0.10–0.50 | 0.1% | L2 users |
| Ethereum | ~$8 | 0.1% | Avoid if possible |
| BNB Chain | $0.10–0.50 | 0.1% | Binance users |
ACH bank transfer is limited to holders of US bank accounts. If that does not apply to you, skip it entirely.
On-Chain Deposit Tutorial
Picking the wrong chain can cost you 10x more in fees. Sending $500 USDC on Ethereum burns roughly $8 in gas. The same transfer on Solana costs virtually nothing. Chain selection is the single most important step.
Standard Flow (4 Steps)
Step 1: Buy USDC on your exchange and select the Solana network for withdrawal. OKX, Binance, and Bybit all support Solana withdrawals. The most common mistake is defaulting to ERC20, which adds $8 in gas for no reason.
Step 2: Open the Kast App. Tap Add Money → Crypto → select USDC → select Solana → copy the deposit address.
Step 3: Go back to your exchange withdrawal page. Paste the address, enter the amount, double-check that the network says Solana, and submit.
Step 4: Wait 5–30 seconds. Solana is fast. Your Kast balance updates almost instantly and the funds are ready to spend.
Deposit Amount Tip
There is no published minimum deposit, but the 0.1% conversion fee means depositing at least $50 at a time makes the most sense economically. Tiny deposits have a worse fee ratio. Consolidate your top-ups when possible.
Already Have ETH or BTC?
Send them directly to the corresponding chain address in Kast. The system auto-converts to your account balance. The cost is network gas plus 0.1% — no hidden spread. Just remember that Ethereum gas runs around $8. If the amount is small, swapping to USDC and using Solana will save you money.
Solana: near-zero gas, 5–30 second arrival. There is no reason to use Ethereum.
Deposit FAQ and Notes
What If I Send to the Wrong Address?
On-chain transfers are irreversible. There is no refund mechanism. After copying the address, verify the first 4 and last 4 characters match. Clipboard malware that swaps addresses is a real threat — never skip this check.
How Long Does KYC Take?
Passport plus face scan, 10–30 minutes for most people. You cannot withdraw funds until KYC is approved, so complete identity verification before your first deposit to avoid having funds stuck.
How Soon Can I Spend After Depositing?
Solana deposits are available almost instantly. Ethereum requires block confirmations and typically takes 5–15 minutes. If speed matters, Solana is the only sensible choice.
Can I Send From OKX or Binance?
Yes. On the exchange withdrawal page, select the Solana network and paste your Kast deposit address. OKX, Binance, Bybit, and Coinbase all support Solana withdrawals.
No Exchange Account?
If you already have a Phantom or MetaMask wallet, you can send crypto directly to Kast. If you have no crypto at all, you will need to sign up for an exchange first, buy USDC, and then follow the standard flow above.
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This article is for educational purposes only and does not constitute investment or financial advice. Cryptocurrency markets are highly volatile — assess your personal risk tolerance before depositing. On-chain transactions are irreversible; always double-check the address and network before sending. Fee information is based on current conditions and may change; refer to official announcements for the latest rates.
