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Onyx Mastercard® card

Onyx Mastercard®

Annual fee
None
Recommended credit
Excellent
Card network
Mastercard
Intro purchase APR
0% for 6 months
Check before you apply: the rates, fees and offers on this page are as listed on the original card page (updated May 28, 2025) and may have changed. Confirm current terms on the issuer’s website. Best Credit Cards Guide may be compensated by some issuers; see our Advertiser Disclosure.

At a glance

Earn 2% cash back rewards and enjoy no hidden fees with the impressive Onyx Mastercard® from Texas Dow Employees Credit Union. The no annual fee card offers big credit limits, an even bigger rewards cap, and more.

Our review of the Onyx Mastercard®

The Onyx Mastercard® from Texas Dow Employees Credit Union (TDECU) is a top-tier credit card option that offers exceptional cash back rewards and no hidden fees, all with a $0 annual fee. With the ability to earn unlimited 2% cash back on all eligible purchases, the Onyx Mastercard® stands out among the best cash back cards on the market.

Earn Unlimited 2% Cash Back

One of the key features of the TDECU Onyx Mastercard® is the impressive 2% cash back rate on all eligible purchases. This puts it on par with some of the highest-earning cash back cards available, such as the Alliant Cashback Visa Signature. However, unlike some competitors, the Onyx Card offers double cash back on regular purchases without any confusing fine print.

How to Redeem Cash Back Rewards

Cash back rewards earned with the Onyx Card automatically apply to the account each October. The accumulation period runs from the day the cardholder receives their Onyx Card through September 30th of the same year. It’s important to note that rewards expire if the account is closed voluntarily or if the account is delinquent.

0% Intro APR

In addition to its impressive rewards program, the Onyx Card also features a 0% introductory APR period for both purchases and balance transfers. With a 0% APR for six months on purchases and 12 months on balance transfers, cardholders have the opportunity to finance large purchases or pay down existing balances without accruing interest.

An Impressive APR Every Day

The Onyx Mastercard® offers competitive interest rates starting as low as 9.5%, making it a great option for those with excellent credit. Even at the higher end of the spectrum, the APR never exceeds 18%, providing cardholders with a cost-effective financing solution.

No Hidden Fees

Unlike many credit cards, the Onyx Mastercard® from TDECU has no hidden fees of any kind. This includes no annual fees, maintenance fees, foreign transaction fees, or fees for cash advances or balance transfers. This transparency sets the Onyx Card apart from other cards in the market.

Should You Apply for the TDECU Onyx Mastercard®?

To qualify for the Onyx Mastercard®, applicants must be TDECU members with excellent credit and a high level of spending. With a minimum FICO score requirement of 720 and a reported average annual spending of $56,000 among cardholders, the Onyx Card is tailored for those who meet these criteria.

If you meet the requirements and are looking for a credit card that offers generous cash back rewards, low rates, and no hidden fees, the Onyx Mastercard® from TDECU is a standout option worth considering.

Card features

Benefits as listed on the original card page. They can change; confirm details with the issuer.

  • No annual fee
  • No foreign transaction fees
  • No fees for balance transfers or cash advances
  • Earn 2% on all eligible purchases

Who this card may suit

  • You're a current member of TDECU or qualify for membership
  • You have excellent credit
  • You want a versatile rewards card that also doubles as a balance transfer credit card
  • You do't want to pay an annual fee

Rates, fees and terms

Rates, fees and terms as listed on the original card page (updated May 28, 2025). Confirm current terms on the issuer’s site.
Annual FeeNone
Intro Purchase APR0% for 6 months
Regular Purchase APR9.50% to 17.50% variable based on creditworthiness and the Prime Rate
Intro Balance Transfer APR0% for 12 months
Balance Transfer APR9.50% to 17.50% variable based on creditworthiness and the Prime Rate
Cash Advance APR17.50% variable based on the Prime Rate
Late Payment Penalty FeeUp to $25
Return Payment Penalty FeeUp to $25

Confirm before you apply: rates, fees and offers change often. The figures above are the ones listed on the original card page, not a current quote from the issuer. APRs are typically variable, and the rate you receive depends on your creditworthiness. Recommended credit: Excellent Credit.

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Onyx Mastercard®

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Annual fee
None
Recommended credit
Excellent / Good
Intro APR
0% for 15 months from account opening date