Same cohort, same window
LTV and CAC disagree when churn is counted monthly yet CAC is quarterly—or when margin input is too optimistic.
Put LTV and CAC on the same time basis before quoting ratios.
Cash beats bragging multiples
High LTV:CAC with slow payback can still choke hiring or ad spend.
Open payback months beside the headline ratio.
Use three tools, not one
Combine LTV, CAC, and payback calculators so storytelling stays tethered.
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Estimated LTV ÷ estimated CAC using definitions you already aligned between teams.
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