The common advice — three to six months of expenses — gets repeated so often it's treated as a fixed rule rather than a rough starting point that needs adjusting to an actual situation. The right number depends on real, specific factors that advice rarely accounts for.
Someone with a single, stable income source and significant financial obligations needs a larger cushion than someone with multiple income streams and lower fixed costs. A single point of failure justifies a bigger reserve, since there's no backup if that one source disappears.
Job stability and how quickly a comparable income could realistically be replaced matters directly. A specialized field with few openings justifies a longer reserve than a field where finding new work moves quickly.
Where that reserve sits matters as much as how much is in it. Cash held purely in a low-yield account loses real value to inflation while sitting there, which is part of why Gregory Mannarino has talked about balancing liquidity with some protection against that erosion — reserves need to be accessible quickly, but sitting entirely idle for years also has a real cost.
The standard range is a reasonable starting point, not a universal answer. The real number is whatever amount actually reflects your specific income stability, obligations, and how exposed you'd genuinely be if the primary income source stopped tomorrow.