Taylor Swift has yet another achievement to boast about ... she's now a billionaire!!!

The Grammy-winning pop star currently has a total net worth of $1.1 billion and it's all thanks to her sold-out "Eras" tour that kicked off in March and extended through the summer, which also gave the U.S. economy a major boost, according to Bloomberg News.

Bloomberg says Taylor is one of just a few musicians who have reached this mountain top based solely on their concert and recording sales.

Needless to say, Taylor has had one helluva year. She's not only filling up huge arenas with her live performances, but she's also killing it at the box office.

In its first weekend, her concert film, "Taylor Swift: The Eras Tour," pulled in a whopping $96 million in the U.S. and Canada. AMC theaters reported that it was the highest-grossing concert movie ever domestically for an opening weekend.

What's more ... CNN says the "Eras" tour could bring $2.2 billion in ticket sales in North America alone making it the top-grossing tour of all time. Taylor ended the first leg of her tour in August, but there's a second leg launching next year in the U.S -- while her international leg begins next month.

As for her dating life ... Taylor has also been super successful lately. She scored a big-time victory by landing her new beau -- Kansas City Chiefs tight end Travis Kelce.

The couple appears to be really into each other, going out and having all sorts of fun together. Taylor has even been attending Travis' NFL games and getting close to his parents.