It is intended to provide a method capable of industrially and efficiently producing acetic acid having a good potassium permanganate test value without a large cost.A method for producing acetic acid according to the present invention is a method for producing acetic acid comprising: a carbonylation reaction step; an evaporation step; a lower boiling point component removal step; and a first overhead stream recycle step of recycling at least a portion of an aqueous phase and/or an organic phase obtained by condensing a first overhead stream obtained in the lower boiling point component removal step to a reaction vessel, wherein a crotonaldehyde concentration in a first acetic acid stream obtained in the lower boiling point component removal step is controlled to not more than 2.2 ppm by mass. The catalyst system may further contain an ionic iodide. The method for producing acetic acid may further comprise an acetaldehyde separation and removal step of distilling at least a portion of the aqueous phase and/or the organic phase obtained by condensing the first overhead stream to separate and remove acetaldehyde.