Basic Brewing TimeframeOverall Cycle Range‌Minimum: 2.5 weeks (using a rapid fermentation process)Standard: 3-4 weeks (for most commercial beers)Maximum: 8 weeks+ (for high-alcohol beers or traditional lagers)

When Is Primary Fermentation Complete?The signs of fermentation reaching a stop are quite visual. But, it does not mean that it is an effective tell of complete Primary Fermentation. You have to undertake confirmatory steps to be absolutely sure. You would not want to have a half-fermented beer, now