Upon its release, "...Ready for It?" was seen by many critics as an improvement from
Reputation lead single "Look What You Made Me Do"; Favorable reviews considered the song anthemic and
catchy. Mary Wang of
Vogue described the track as both a love song and a stadium anthem, Patrick Ryan of
USA Today lauded the "sparkling, anthemic" chorus, Tom Breihan of
Stereogum was impressed by the musical elements that were new to Swift such as rapping, tropical house, and sudden dynamic changes, writing that she "rides a beat better than anyone could've reasonably expected".
Slant Magazine's Alexa Camp thought that the song was carefully constructed with catchy pop melodies and rapping cadences. Retrospective reviews have considered "...Ready for It?" an effective opener for
Reputation. According to
Billboards Joe Lynch, when the song was first released, "casual listeners were confused,
Swifties were challenged, and haters were given a bounty of fresh ammo".
Vultures Nate Jones wrote that he disliked Swift's
flow "borrowed from
Jay-Z" but regarded the chorus as undeniable.
Stereogum ranked "...Ready for It?" among the 40 best pop songs of 2017, and
Variety's Chris Willman placed it at number 38 on his 2024 ranking of Swift's 75 best songs. Less complimentary comments were from
NMEs Hannah Mylrea, who described the song as a messy combination of genres, ==Commercial performance==