Americans could spend more than ever on Cyber Monday this year. In fact, sales could be up as much as 12% from last year to $3 billion, according to Adobe’s Digital Index.

While sales on the day are forecasted to top $3 billion, online Black Friday sales may not be much less. The day after Thanksgiving could generate $2.7 billion, or up 15% from last year. Online Thanksgiving sales a day earlier could be up 18% to $1.6 billion, according to Adobe.

“Although [Cyber Monday] isn’t growing as fast, it still is the king of all shopping days online,” said Tamara Gaffney, an analyst at Adobe Digital Index, in an interview with CNBC.

In 2012, consumers spent $2 billion on Cyber Monday.

“Overall, Americans will spend upward of $83 billion online this holiday season (November to December), 11% more than they did last year,” according to the study.

“What’s interesting here is that, despite so much advertising to try to get people to start their shopping earlier in the season, we expect Cyber Monday to continue to be the biggest online shopping day of the year,” added Gaffney in a statement. “Retailers and brands are still having trouble getting consumers to start shopping earlier.”

Fortune’s Leena Rao wrote more about online holiday sale expectations last month. Deloitte forecast online e-commerce could be up around 9% for the season.