ToolFree · no email · ~30s
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 number.
Inputs
Tell it three things.
$10,000
$1,200
6.0%
Current6.0%
If you fix 1pp5.0%
1 point of churn · 12 month cost
$7,843
Extra revenue over 12 months if monthly churn drops from 6.0% to 5.0%.
MRR · next 12 months
Solid: current trajectory. Dashed: 1 point fixed.
current fixed
Month 12 · current
$15,241
cumulative lost: $9,759
Month 12 · fixed
$16,435
cumulative lost: $8,465
That extra $7,843 is exactly what a weekly brief catches. One cohort leaking one point, flagged before it hides in the annualized number.
Get the Monday briefThe math, honestly
This calculator projects compounding churn against your new-MRR additions. It assumes signups stay roughly constant. In reality they grow, which makes the gap worse, not better. Expansion revenue isn't included, which would flatter the 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 roughly $6K–$12K over 12 months. On $100K MRR, it's $60K–$120K. That's the whole pitch.