Forever 1 debuted at number two on South Korea's Circle Album Chart in the chart issue dated August 7–13, 2022; on the monthly chart, the album debuted at number five in the chart issue dated August 2022. In Japan, the album debuted at number 18 on the Billboard Japan Hot Albums in the chart issue dated August 10, 2022. On the Oricon's chart, the album debuted at number 14 on the Albums Chart in the chart issue dated August 29, 2022; on the monthly chart, the album debuted at number 48 in the chart issue dated August 2022. The album also debuted at number four on the Digital Albums Chart in the chart issue dated August 15, 2022, and number 48 on the Combined Albums Chart in the chart issue dated August 22, 2022. It ascended to number nine on the Oricon Albums Chart, and number eight on the Combined Albums Chart in the chart issue dated September 12, 2022.
