Ship Billing in 7 Days: From Zero to Real Invoices

Day-by-day

Day 1–2: add SDK; send three events (action, heavy cost, outcome). Day 3: define plan = platform fee + per-action; add monthly minimums. Day 4: backfill 30 days; generate "shadow invoices"; reconcile. Day 5: simulate +10% / tier change; flag <30% margin accounts. Day 6: turn on payments + dunning; show "usage this period" in-app. Day 7: ship v1.1 on feedback—without redeploys.

Why the urgency

Competitors are marketing fast paths to hybrid/usage; founders need the same agility without rewiring their stack.

UnitPay angle

• 10-line SDK; price versioning baked in; auto-billing for subscriptions + usage + outcomes in one place.

Book a 30-min "7-Day Billing" setup—we'll leave you invoicing.