Austrittsrate & Retentionsrechner

Gross MRR churn measures only revenue lost — cancellations plus downgrades — divided by starting MRR. Net MRR churn subtracts expansion MRR from that loss, so it can be zero or even negative when upsells outpace cancellations. Gross is the honest retention signal; net is the growth-adjusted signal investors quote alongside NRR.

NRR includes expansion revenue from existing customers — seats, tier upgrades, usage growth — but excludes brand-new acquisitions. When upgrades exceed churn plus contraction, the existing base alone grows revenue, producing NRR above 100%. This 'net-negative churn' compounds: a 120% NRR business grows ~20% per year with zero new customers.

Use the cadence that matches your billing and revenue review. Most SaaS companies report monthly churn for operating visibility and annualize it for board and investor materials. Always annualize using compounding (1 minus the surviving fraction raised to the number of periods), not simple multiplication, because survival is multiplicative.

They measure different things. Customer churn counts accounts; revenue churn weighs each account by its MRR. If small customers leave while large ones renew, customer churn looks bad while revenue churn looks fine — and vice versa. Tracking both prevents misreading the health of an account base where contract value varies widely.

Enterprise SaaS typically targets under 1% monthly logo churn and under 5% annual gross revenue churn. SMB SaaS commonly runs 3–5% monthly churn given smaller deal sizes and faster sales cycles. Best-in-class companies aim for NRR above 110% and gross revenue retention above 90%, the combination that signals durable expansion economics.