Professional ratings
Aggregate scores
Source	Rating
Metacritic	77/100
Review scores
Source	Rating
AllMusic
Clash	7/10
Consequence of Sound	B
DIY
Exclaim!	9/10
The Observer
Pitchfork	7.1/10
Spin	7/10

IV is the fourth studio album from Canadian jazz instrumental hip hop band BadBadNotGood. It was released on July 8, 2016. It features collaborations with Future Islands frontman Sam Herring, saxophonist Colin Stetson, Haitian-Canadian musician Kaytranada, American hip hop artist Mick Jenkins, and Canadian singer-songwriter Charlotte Day Wilson.

It is also the band's first album to feature longtime touring partner and collaborator Leland Whitty as a formal member of the band.

In an interview with Howl & Echoes, the band described IV's conception and recording process:

IV received favorable reviews from contemporary music critics. At Metacritic, which assigns a normalized rating out of 100 to reviews from mainstream critics, the album received an average score of 77, based on 16 reviews, which indicates "generally favorable reviews".

Mackenzie Herd of Exclaim! praised the album, stating, "Each song possesses rhythmic and melodically intricate properties that sound somehow both rehearsed and spontaneous. So, while IV is extraordinary for delivering fresh music that elaborates on their past work, it feels particularly exceptional because of its forward momentum." Paul Simpson of AllMusic gave the album a favorable review, stating, "It's easy to see why BBNG are the type of jazz group that appeals to people who normally don't care for jazz. They're music lovers, first and foremost, and they're directly in tune with what's happening in the music world. They blend numerous influences and don't conform to any traditions. More than anything, their music is exuberant and immensely enjoyable."

Jamie Milton of DIY was more critical of the album, stating, "There’s not a great deal tying these songs together, aside from BBNG’s pursuit of the new. Collaborations aren’t here to generate headlines or set pulses racing - each serves its own noble purpose. Taken on their own, each track solidifies the group’s wild imagination, but IV is tough to stomach as the free-flowing, full-bodied juggernaut that it is."

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