Marginflow
Free LTV : CAC Calculator
Lifetime value on gross profit — not revenue — plus your LTV:CAC ratio, how many months it takes to earn back acquisition cost, and the most you can afford to pay for a customer.
Your numbers
$
%
after COGS, shipping and fees
per customer, on average
years before they stop buying
$
total ad spend ÷ new customers
×
3 is the usual benchmark
LTV : CAC
4.90×
profit earned per $1 of acquisition
Healthy at 4.90×. Acquisition is paying for itself with room to grow.
Lifetime value
$107.78
gross profit, not revenue
CAC payback
4.9 months
time to earn the cost back
Max affordable CAC
$35.93
at your target ratio
Profit per year
$53.89
per active customer
LTV here is gross profit, not revenue: AOV × margin × orders per year × lifespan. Revenue-based LTV inflates the ratio by however large your costs are, which is exactly the number that makes an unprofitable business look fine.
Marginflow
See real cohort LTV from your actual orders.
Marginflow connects to Shopify and tracks profit, margin, ROAS and POAS per order — with cohort LTV built from real repeat behaviour instead of an assumption you typed in. Free to start.
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