Taylor Swift new Song Love Story Commercial performance

With its peaking at number one on Mainstream Top 40, "Love Story" surpassed "You're Still the One" (1998) by Shania Twain (pictured in 2004) as the highest-charting country crossover to pop radio in the U.S.

In the U.S., "Love Story" debuted at number 16 on the Billboard Hot 100 and at number 25 on the Hot Country Songs chart, both dated September 27, 2008.[55][56] The next week, it reached number five on the Hot 100.[57] The single peaked at number four on the Hot 100 chart dated January 17, 2009, and spent 49 weeks on the chart.[58] It spent two weeks atop the Hot Country Songs chart.[59] On the Mainstream Top 40 (Pop Songs) chart, which tracks U.S. pop radio, "Love Story" reached number one on the week ending February 28, 2009.[60] It became the first song to top both the country-radio and pop-radio charts and surpassed the number-three-peaking "You're Still the One" (1998) by Shania Twain as the highest-charting country crossover to pop radio.[61]

On other Billboard airplay charts, "Love Story" peaked at number one on Adult Contemporary and number three on Adult Pop Songs.[62][63] Together with "Teardrops on My Guitar" (2007), "Love Story" made Swift the first artist in the 2000s decade to have two titles each reach the top 10 of four airplay charts; Hot Country Songs, Mainstream Top 40, Adult Pop Songs, and Adult Contemporary.[64] It topped the 2009 year-end Radio Songs chart.[65] By February 2009, with three million downloads sold, it was the all-time best-selling country single.[66] In 2015, the Recording Industry Association of America (RIAA) certified "Love Story" eight-times platinum.[67] The single had sold 6.2 million copies in the U.S. by October 2022 and became Swift's highest-selling single in the nation.[68]

"Love Story" was Swift's first number-one single in Australia,[69] where it was certified ten-times platinum.[70] It peaked within the top five of singles charts in Japan (three),[71] and the wider English-speaking world: the UK (two),[72] Ireland (three),[73] New Zealand (three),[74] Canada (four),[75] and Scotland (five).[76] In mainland Europe, the single peaked at number ten on the European Hot 100 Singles chart,[77] number four in the Czech Republic,[78] number six in Hungary,[79] number seven in Norway,[80] and number ten in Sweden.[81] "Love Story" was certified triple platinum in the UK,[82] double platinum in Canada,[83] platinum in Denmark, Germany, and New Zealand,[84][85][86] and gold in Italy and Japan.[87] It sold 6.5 million digital copies worldwide and was the sixth-most-downloaded single of 2009.[88] By February 2021, estimated worldwide sales of "Love Story" stood at 18 million units.[89]