Kast Card referral, invite, coupon, promo and unlock code: 6MHGEMGE explained
The Kast Card referral code is 6MHGEMGE. People search for it under five names (referral code, invite code, coupon code, promo code and unlock code), and all five point to the same thing: the code you enter when you join KAST.
What is Kast Card?
Kast Card is a Visa card from KAST, a financial technology company that runs a money app built on stablecoins. KAST is not a bank. You hold USDT or USDC in the app, and the card spends that balance at more than 150 million merchants in 170+ countries (Indonesia among them), in stores, online and through Apple Pay or Google Pay.
A Kast Card account is free on the Standard tier, and our Kast Card fees list covers every charge after that. A referral code is optional, but it is the only way to get the welcome bonus and the membership discount described below.
Kast Card referral code: 6MHGEMGE
The Kast Card referral code is 6MHGEMGE. A referral code is a code that links your new KAST account to the person who invited you, and it is what KAST uses to pay sign-up rewards.
Signing up with 6MHGEMGE gives you a $20 USD bonus after your first $100 of card spend and 10% off your first paid membership. The code is free to use, and it works through the referral link too: open app.kast.xyz/
Kast Card invite code: 6MHGEMGE
The Kast Card invite code is 6MHGEMGE. An invite code is the same thing as a referral code: KAST gives every user one to invite friends, and "invite" is simply the word many people use when they share it.
There is no separate invite-only access to KAST. Anyone in a supported country can sign up; the invite code only decides whether you get the referral rewards.
Kast Card coupon code: 6MHGEMGE
The Kast Card coupon code is 6MHGEMGE. A coupon code here means the discount part of the referral: 10% off your first paid membership, which is $100 off Premium ($1,000 a year) or $1,000 off Private ($10,000 a year).
The discount applies to the membership, and the cards come with it: Premium includes a metal card and Private a gold-plated card. The physical Standard card is free apart from $40 shipping, so there is nothing to discount there. The same 10% applies to Solana Illuma and Solana Gold, the Solana designs of Premium and Private (see our Kast Solana Card page). Some affiliate links advertise bigger discounts on paid tiers; this code gives the standard 10%.
Coupon, discount and unlock codes each get their own section on our Kast Card discount code page.
Kast Card promo code: 6MHGEMGE
The Kast Card promo code is 6MHGEMGE. A promo code is the code that unlocks whatever offer KAST is running for new users, and with KAST that offer comes through the referral program.
Right now that means the $20 first-spend bonus and the 10% membership discount. Cashback goes up to 8%, and KAST also runs time-limited offers such as referral giveaways. They change often, so the Rewards tab in the app is the place to check what is live in your country.
Kast Card unlock code: 6MHGEMGE
The Kast Card unlock code for new users is 6MHGEMGE. An unlock code is a code that opens extra rewards on your account, and for someone joining KAST today that is the referral code. It unlocks the $20 bonus once you spend $100, and the discount on your first upgrade.
KAST has also used one-off unlock codes in the past, for example printed codes that unlocked a pre-release Bitcoin card in 2025. Those were limited giveaways, and signing up does not require one.
What 6MHGEMGE gets you on KAST
| Reward | Amount | When it unlocks |
|---|---|---|
| Free virtual cards | Unlimited, on the free Standard tier | At sign-up |
| Welcome bonus | $20 USD | After ID verification and your first $100 of card spend |
| Membership discount | 10%: $100 off Premium, $1,000 off Private | On your first paid upgrade |
| Cashback | Up to 8% (1.5% base on Standard) | From your first purchase (from your tier, not the code) |
Amounts can vary by country and campaign. Rewards can be taken back if the purchases that unlocked them are refunded.
How to use the Kast Card referral code
- Open app.kast.xyz/
referral/ on your phone; it sends you to the App Store or Google Play with the code attached.6MHGEMGE - Create your account with your email. If the referral field is empty, type 6MHGEMGE.
- Verify your identity with a passport, national ID or driving licence and a live selfie. Most checks clear in 5 to 15 minutes.
- Pay with the Kast Virtual Card in Apple Pay or Google Pay. After your first $100, the $20 bonus appears in the Rewards tab.
Add a Kast Card referral code after signing up
A referral code can be added after sign-up. In the app go to Profile → Account → Referred by → Add Code and enter 6MHGEMGE.
Add it before you start spending. The rewards are tied to spending milestones, and a code entered after you have passed them may not count.
How Kast Card referrals pay the referrer
The person who shares a code earns up to $250 per friend. It is paid in steps as the friend's card spend reaches $600, $1,600 and $6,600 within 45 days of their verification, with an extra bonus if the friend upgrades. There is no limit on how many friends you refer.
The "up to $250" figure on some code pages is the referrer's reward. A new user signing up with 6MHGEMGE gets the $20 bonus and the 10% discount.
Kast Card referral code terms
- One code per account; referral, invite, coupon, promo and unlock code all mean the same code.
- Rewards need ID verification and real card spend; signing up alone earns nothing.
- Amounts and campaigns change and can differ by country.
- Rewards can be reversed on refunded purchases.
- The code is free and does not change your cashback rate.
This guide is for information only. This site is independent and not operated by KAST. Rewards and terms change; the KAST app shows the current offer. Images: KAST on X.
