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What your leaky bucket actually costs.
Most SaaS founders can't tell you what a single point of churn costs them. Here's the math, played forward 12 months. Drag the sliders. See the truth.
your numbers
Tell us three things.
$10,000
$1,200
6.0%
At 6.0% churn
If you dropped it to 5.0%
what 1 point of churn costs you
$7,843
extra revenue over 12 months, if you dropped monthly churn from 6.0% to 5.0%.
MRR — next 12 months
Solid: your current trajectory. Dashed: if you fixed one point.
current fixed
month 12 · current path
$15,241
cumulative lost: $9,759
month 12 · fixed path
$16,435
cumulative lost: $8,465
so what · That extra $7,843 is exactly what a weekly brief catches. Trenith reads your Stripe, finds the one cohort leaking the point, and tells you what to do about it.
Get the Monday brief — 14 days free →The math, honestly
This calculator projects compounding churn against your new-MRR additions. It assumes your new signups stay roughly constant — in reality they grow, which makes the gap worse, not better. It doesn't include expansion revenue, which would flatter a lower churn number. Net: this is the optimistic version of the truth.
A 1-point reduction in monthly churn on a $10K MRR SaaS is worth about $6,000–$12,000 to you over 12 months. On $100K MRR, it's $60K–$120K. That's the whole pitch.