Kast Arbitrum Card, explained: USDC and USDT on Arbitrum, ARB and the cheapest way out
The Kast Arbitrum Card is the KAST Visa card funded over Arbitrum. KAST takes USDC and USDT on Arbitrum with no KAST fee, converts ARB on arrival, and lets you send USDC back out on Arbitrum for $0.20 plus 0.1%, its cheapest withdrawal.
What is the Kast Arbitrum Card?
The Kast Arbitrum Card is the regular KAST Visa card, topped up with USDC, USDT or ARB sent over Arbitrum, the Ethereum layer 2. There is no separate card to order: you pick Arbitrum as the network when you deposit, and the money lands in the same dollar balance the card spends from.
Arbitrum has the lowest withdrawal fee of any KAST network, which suits anyone who moves USDC in and out of KAST regularly.
How to deposit USDC or USDT on Arbitrum to KAST
KAST takes both USDC and USDT on Arbitrum. The steps are the same for either:
- In the KAST app, tap Receive and choose Stablecoin.
- Pick USDC or USDT, then Arbitrum from the network list.
- Copy the address with the copy button.
- Withdraw the same coin on Arbitrum (often labelled Arbitrum One) from your exchange or wallet to that address.
KAST charges nothing and credits it 1:1 in dollars. At least $1 has to arrive after network fees. Our Kast Card sign up page covers the ID check if you don't have an account yet.
Sending USDC out on Arbitrum for $0.20 + 0.1%
KAST sends USDC out on three networks, Solana, Ethereum and Arbitrum, and Arbitrum is the cheapest of them. The fee is $0.20 plus 0.1% of the amount, with a $5 minimum withdrawal. On $1,000 that is $1.20, against $2 on Solana and $7 on Ethereum.
Open Pay, choose Stablecoin, pick USDC and Arbitrum, paste the 0x address and check the fee line before you confirm. USDT can't leave on Arbitrum; it goes out on Solana, TRON or Ethereum, covered on our Kast Solana Card and Kast TRON Card pages.
Sending ARB to KAST
ARB, Arbitrum's governance token, is on KAST's convert list. It arrived with the October 2025 update that opened deposits to more than 25 crypto assets for instant spending.
Choose Crypto in the Receive screen, pick ARB and copy the address. The app shows an indicative price, sells what arrives for stablecoins and shows the conversion fee before you confirm, usually 2% to 5%.
What Arbitrum costs with KAST
KAST puts Arbitrum with Base, Optimism and Avalanche as a moderate-fee network: transfers usually settle in under a minute and gas runs from a few cents to under a dollar. KAST adds nothing on deposits.
Card payments in US dollars are free, other currencies carry a 0.5% to 1.75% FX fee, and every other charge is on our Kast Card fees page.
Spending Arbitrum funds with the Kast Card
Once the deposit lands it is a dollar balance you can spend anywhere Visa works. Cashback is paid in US dollars: up to 8%, with 1.5% on the free Standard tier and more on the paid tiers.
Arbitrum or Ethereum? Getting the network right
Arbitrum addresses look exactly like Ethereum ones, so a wallet won't warn you if you mix them up. Pick the coin and Arbitrum in KAST first, then copy the address, and choose Arbitrum on the sending side too.
If funds go out on the wrong network, recovery isn't guaranteed. When it works it takes 1 to 2 weeks, costs a fee and returns the money to the sending wallet.
Kast Arbitrum Card referral code: 6MHGEMGE
The referral code for the Kast Arbitrum Card is 6MHGEMGE. It works whatever network you fund with: $20 after your first $100 of card spend and 10% off a paid membership. Sign up through app.kast.xyz/
Our KAST referral code page explains what triggers each reward.
Information only, not financial advice. This site is independent and not operated by KAST. Network facts from KAST Concierge (supported stablecoins, tokens and blockchains, fees) and KAST's posts on X, checked Oct 2026. Images: KAST on X.
