Billing · 2026-04-19 · 5 min read
How credit ledgers protect AI products
Why credit balance alone is not enough once users start paying for generation and expecting transparent billing.
Balance is not the source of truth
A single balance number tells you what a user has left, but it does not explain how they got there. Once real money is involved, every purchase, deduction, refund, and admin adjustment needs an immutable record.
Pending, completed, and refunded states matter
Generation calls can fail. Payment webhooks can retry. Admin support can apply compensation. A ledger with explicit states is what lets you distinguish a successful charge from a refunded attempt or a manual correction.
Why this matters before launch
If you add billing after users arrive, you end up retrofitting trust, not building it. Launching with a proper ledger means support, analytics, and financial reconciliation all start from clean data.