Are there any 10% cash back credit cards?

No, there aren’t any 10% cash back credit cards currently, at least none offering that much back on all purchases. From time to time, it’s possible to find a credit card offering 10% cash back in specific spending categories or when there’s a promotional offer. But this is extremely rare. However, there are several credit cards on the market that offer high cash back rates. 

Here are some good credit cards with high cash back rates:

Blue Cash Preferred offers 6% cash back at U.S. supermarkets (up to $6,000 spent per year), 6% back on select U.S. streaming subscriptions, 3% back at U.S. gas stations and on transit, and 1% back on all other purchases, earned as statement credits. With this card, you also earn $250 statement credit for spending $3,000 in the first 6 months.

Chase Freedom Unlimited offers 5% cash back on travel through Chase, 3% back at restaurants and drugstores, and 1.5% back on all other purchases (plus an additional 1.5% cash back on everything, up to $20,000 spent the first year).

Citi Custom Cash offers 5% cash back in your top eligible spend category each billing cycle (up to $500 spent, 1% back thereafter), as well as 1% back on all other purchases. Plus, this card gives you $200 for spending $1,500 in the first 6 months.

U.S. Bank Cash+ offers 5% cash back on two categories of your choice (up to $2,000 each quarter), 5% back on prepaid air, hotel and car reservations booked in the Rewards Center, 2% on your choice of one everyday category (like gas stations, grocery stores or restaurants) and 1% on all other purchases. Plus, this card gives you $200 cash back for spending $1,000 in the first 120 days.

The CB2 Credit Card offers 10% back in reward dollars at CB2, 2% on groceries and 1% back on all other purchases.

All of these credit cards give at least 5% cash back on certain expenses. Some of those categories may change quarterly or yearly, require activation and usually have a cap. However, 10% cash back credit card offers are extremely rare and they’re usually available for a limited time only. There’s never been a general-purpose credit card that rewards users with 10% cash back on all purchases.

I wish! But no, the highest I've seen is 6%.

Nah, it's usually 5 or 6% max. I think there was a promotion by Amex once, but it's gone now.