> ## Documentation Index
> Fetch the complete documentation index at: https://docs.rhinestone.dev/llms.txt
> Use this file to discover all available pages before exploring further.
# Billing
> Pay for sponsorship with a saved card, and cap your monthly spend
Sponsorship is pay-as-you-go: your users' fees are sponsored as they happen, and Rhinestone invoices your organization once a month for what it used, charged automatically to a card you save in the dashboard.
Billing is organization-wide — every project in your organization shares one card, one invoice, and one usage limit. Everything lives in the [Dashboard](https://dashboard.rhinestone.dev) under **Settings → Sponsorship**.
## Saving a card
Owners and admins press **Save card**, enter their card details in the hosted Stripe form, and submit. Submitting authorizes Rhinestone to charge that card automatically once a month for that month's sponsorship usage — there is no separate consent step.
The card shows as **Ready** once the setup is confirmed. If the confirmation is still settling, the panel says the card was submitted and setup is processing, with a **Check again** action.
Other roles see the card state read-only.
## Invoices and payment history
Your organization gets one invoice per calendar month. Press **Manage** to open the billing portal in a new tab, where you can download past invoices and update the card on file.
Every organization admin is emailed when an invoice is ready, and when a payment needs attention — a failed charge, or a bank asking to authenticate the payment.
## Accrued usage this period
The **Accrued sponsorship usage** panel shows gross usage for the current billing period, labeled with the period's dates, broken down into **Sponsored gas**, **Bridge fees**, **Swap fees**, **Protocol fees** and **Other sponsored costs**.
Gross usage is informational, not an estimate of the final invoice amount: prepaid balance and credits are applied when the invoice closes.
## Monthly usage limit
The **Monthly usage limit** panel is an optional organization-wide hard cap on sponsored spend for the **UTC calendar month** — a different window from the billing period above. It shows month-to-date spend, the limit, and remaining headroom; both read `Unlimited` when no limit is set.
Owners and admins press **Edit** to set, change, or unset the limit.
The cap is hard, not advisory. Setting a limit at or below current month-to-date spend makes subsequent sponsored work refuse immediately — your users then pay their own fees, so their intents keep working.
### Limit alerts
When a limit is set, Rhinestone emails your organization admins at 90%, 95%, and 99% of it, once per threshold per calendar month. No limit means no alerts.
## Prepaid balance and credits
If your organization still holds a prepaid balance or credits, they appear as **Available balance** and **Credit balance** and are consumed before anything becomes billable. An invoice only charges what they didn't cover.
## Testnets
Testnet sponsorship is free and unmetered: it doesn't accrue usage and doesn't count against the monthly limit. You don't need a card to try sponsorship on testnets.
## Per-project limits vs the monthly cap
The **Sponsorship limits** panel on the same page is unrelated: it caps per-intent spend for the selected project, on mainnet only. The monthly usage limit caps total sponsored spend across the whole organization for the calendar month.
See [Gas & fee sponsorship](/smart-wallet/gas-sponsorship/overview) for what sponsorship covers and how to enable it in code.