The Briefing

**CAC Payback at the Micro Scale** Eleven months to recover customer acquisition costs sits at the median for micro-businesses, but the statistic masks a survival question: whether a 20-person company can endure nearly a year of negative unit economics while simultaneously funding operations. Larger enterprises distribute CAC across diversified revenue streams and credit lines. Micro-businesses rarely have that cushion. The difference between month 11 and month 8 isn't academic—it's existential. Today's briefing examines efficiency at the edges. The CAC payback benchmark reveals how capital-constrained operators think about growth velocity versus runway. The rising author dissects financial frameworks for precisely this cohort: founders who treat every dollar as if it might be their last, because it often is. Meanwhile, the a16z fellowship represents the opposite end of the capital spectrum—abundant resources deployed to merge design and engineering talent in AI tooling. The through-line is optimization under constraint, whether imposed by scarcity or by the demands of emerging technology stacks. **Watch the compression.** Median CAC payback periods have shortened 30% across SaaS cohorts since 2021. Micro-businesses that remain above 12 months will either find capital or find new work. The distribution's tail tells the darker story.