QA in the HIIV — Issue 003
Mid-cycle upgrades, prorated math, and why this one is still blocked.
Welcome to issue three. Every day, we show you what QA is putting through its paces, what could break, and why you should care. Let's get into it.
Synopsis
Mid-cycle upgrades and downgrades between paid subscription tiers, with prorated charges and credits calculated automatically and reflected on the next invoice.
What needs to be QA'ed
Proration math is exact for upgrades, downgrades, and same-day changes
Credits apply correctly and never exceed what was paid
Currency, tax, and rounding handled correctly per region
Invoice and receipt reflect the change clearly for the subscriber
Failed-payment handling mid-change doesn't leave the account in limbo
Webhook/ledger events match what the subscriber is actually charged
Why it matters:
This touches real subscribers' real credit cards, which is the highest-stakes surface we have. An over-charge is an instant chargeback and a furious creator; an under-charge is lost revenue that's hard to recover. There's no "round it off" in billing — it's 🔴 blocked until proration matches the ledger to the cent across currencies, because the only acceptable error rate on someone's money is zero.
See ya next time with more QA and why it matters!
Enjoy, Tina
This content is 100% fictional and made by AI for testing purposes