Bell Credit & billing

This guide summarizes BellD's D-042 Credit model. A Bell Credit represents NT$0.01 of platform pricing value. Credit accounting uses integers. NT$100 corresponds to 10,000 Credits.

What usage costs

AI usage depends on the provider and model rate card, with separate input and output token rates. There is no universal Credits-per-thousand-tokens price. User-facing costs are shown in Bell Credits. Workspace owners and admins can inspect provider, model and token details in billing usage details.

Standard runtime (1 vCPU / 512 MiB) is 1 Credit per 10,000 ms: 360 Credits per hour. Storage is 4 Credits per GiB-day, measured from daily peak stored bytes. Per-call byte reservations are authorization units; they are not the storage billing duration measure.

App members are billed per UTC month starting 2026-12-01. Each workspace gets 1,000 members free per month, counted as the sum of each app's members who used it that month: one person using two apps counts twice, and members who sign in through your own identity provider count too. Each member above 1,000 costs 5 Credits, settled after the fact; it never blocks a member's request. If your balance cannot cover the charge, BellD deducts what is left and absorbs the rest; nothing is taken from Credit you add later. Storage works the same way and is not charged while your workspace is out of Credit.

Each evaluation, including the preview and qualification evaluations, builds and runs your app and is charged as Standard runtime for the time it takes. On paid plans, staging and production deployments stay awake, and you are charged only for the time they spend handling requests, not for the time they are awake. Preview deployments, and all deployments on the Free plan, sleep after 10 minutes without requests.

Credit buckets

Subscription Credit resets each billing cycle and does not roll over. Purchased Credit does not expire. Promotional Credit can have an expiry. Spending uses expiring promotional Credit first, then subscription Credit, then purchased Credit.

Subscriptions and one-time top-ups coexist. D-042 defines NT$100 / 300 / 500 top-ups as 10,000 / 30,000 / 50,000 Credits. Plan prices, included monthly Credit and promotional offers are configurable; consult the current checkout and wallet for your workspace's offer.

Insufficient Credit

There is no overdraft, postpaid billing or automatic top-up in v0. Calls estimate, reserve, execute, settle, and release unused reservations. Insufficient balance prevents the reservation. Long-running work settles in slices and stops gracefully when the next reservation cannot be funded. Usage policy budgets can also deny a call.

BellD billing concerns the Developer's platform usage. It is separate from payments an application collects from its own customers. See Terms and refunds for the legal-review placeholder.