Percent of revenue retained excluding any expansion.
GDR isolates core retention. Low GDR is a product-market fit warning regardless of NDR.
Annual GDR > 90–95% in healthy B2B SaaS; lower suggests PMF/ICP issues.
Start $100k; Contraction $3k; Churn $5k → ((100−3−5)/100)=92%.
Traction slide: show GDR with same window as NDR; annotate cohort definition.