On February 12, 2019, a few days after the release of
Thank U, Next, "Bad Idea" was the ninth most-streamed song worldwide on
Spotify and one of eight tracks by Grande inside the top 11 on the platform's global chart. "Bad Idea" eventually entered a number of countries' charts. The track debuted at number 27 on the February 23, 2019, US
Billboard Hot 100; it was one of eleven songs by Grande to chart that week in the first 40 positions. With this, the singer became the female artist with the most tracks to appear simultaneously in the top 40 in one issue, surpassing
Cardi B, who had nine songs on the chart on April 21, 2018. The following week, it fell to number 55. "Bad Idea" entered the February 23, 2019,
Canadian Hot 100 at number 22. The next week, it dropped to number 51. In Greece, "Bad Idea" debuted at number nine on the sixth edition of the 2019
Digital Singles Chart International. The following week, it peaked at number eight. It spent a total of five weeks on the chart. In Slovakia, "Bad Idea" entered at number nine on the
Singles Digitál Top 100 during the seventh week of 2019. In the next edition, it dropped to number 36. and dropped off the latter. In Ireland, "Bad Idea" entered the
Irish Singles Chart at number 13 on February 22, 2019. In the United Kingdom, the track appeared at numbers 12 and 54 on the
Audio Streaming and
Download charts, respectively, on February 15, 2019. and dropped off the Download chart. On the February 16, 2019, chart "Bad Idea" debuted at number 21 on the Australian
ARIA Singles Chart. In Lithuania, "Bad Idea" debuted at number 7 on the
Singlų Top 100. == Live performances and remix ==