Kast Card discount, coupon and unlock code: 6MHGEMGE, and what each one does
The Kast Card discount code, the Kast coupon code and the Kast Card unlock code all lead to the same place for a new user: referral code 6MHGEMGE. KAST's event coupons and card unlock codes are separate, and each kind of code goes in a different place in the app.
The Kast Card discount code is 6MHGEMGE
The Kast Card discount code is 6MHGEMGE. It takes 10% off your first paid year of membership, which is $100 off Premium at $1,000 a year and $1,000 off Private at $10,000 a year. Paid memberships are billed yearly, upfront, and the upgrade screen in the app has its own field for a discount code.
The card itself needs no discount. The Standard tier is free, virtual cards are free, and only a physical Standard card costs anything, $40 for delivery. Our Kast Virtual Card and Kast Card fees pages cover those costs.
The Kast coupon code is 6MHGEMGE
The Kast coupon code is 6MHGEMGE, the same referral code under the name coupon sites use. It works whenever you sign up.
KAST also runs its own coupons. It shares them at crypto events, through partner creators and on its promotions pages, and you redeem them at card checkout in the Discount code field. Those coupons usually expire, some are single-use, some only work in certain regions, and only one coupon applies per transaction. If one fails, KAST's advice is to check the original terms and retype it exactly, since codes can be case-sensitive.
The Kast Card unlock code is 6MHGEMGE
For new users, the Kast Card unlock code is 6MHGEMGE: it unlocks the $20 welcome bonus after your first $100 of card spend and the 10% membership discount.
KAST also uses unlock codes for cards themselves. Early access designs, such as the Pengu Card in March 2026, were claimed by opening Cards, tapping Order a card, swiping to the card and typing the code. In 2025 KAST printed unlock codes for a pre-release Bitcoin card. And a non-personalised card handed out at an event is linked under Cards → Order card → Unlock card, by entering its 16-digit number; the same screen has a Coupon code option.
What the code gets you, and when
Nothing pays out at sign-up. The $20 arrives in the Rewards tab once your account is verified and you have spent $100 with the card, and the 10% comes off when you first upgrade to Premium or Private. Your fees don't change either way: USD card spend stays free and the FX fee stays at 0.5% to 1.75%.
The full rules, and what the person who shares a code earns, are on our KAST referral code page.
Where to enter the code
The easiest route is the link: sign up through app.kast.xyz/
Nobody sells a real KAST code
Referral codes are free, and KAST never asks you to send funds to verify an account or unlock a card. A seller offering a "VIP" discount, a DM asking for your recovery phrase or 2FA code, or a site that wants card details to apply a coupon are all signs of a scam. KAST Verify at verify.kast.xyz checks whether a link or account is genuine.
Information only. This site is independent and not operated by KAST, and it earns a referral reward if you use the code. Based on KAST's referral terms, the KAST Concierge articles on discount coupons, memberships and card unlocking, and KAST's posts on X, checked Oct 2026. Rewards are set by KAST and can change. Images: KAST on X.
