# Pricing and plans

## Compute[​](#compute "Direct link to Compute")

You pay per second while a job is `RUNNING`, at the hourly rate of the machine it landed on. Queueing, provisioning and result upload are free. Rates are shown by `c3 list` and on the [status page](https://cthree.cloud/status); they differ by provider and change over time, and the job records the rate it was billed at.

When you submit, C3 reserves enough credit to cover the full `time` limit. When the job ends, the reserve is settled against actual use. If the job never ran, because it timed out in the queue or capacity was unavailable, the whole reserve is refunded. A job that would exceed your balance is refused with `INSUFFICIENT_CREDITS`.

## Credit[​](#credit "Direct link to Credit")

New accounts start with £10 of credit.

```
c3 balance            # credit, plan and storage usage
c3 topup 25           # add £25; £10 minimum, £10,000 maximum
```

`c3 topup` and the [billing page](https://cthree.cloud/dashboard/billing) both open Stripe checkout.

## Plans[​](#plans "Direct link to Plans")

Plans set how many machines you can run at once. One running machine is one chip, GPU or CPU. Compute is billed the same on every plan.

| Plan | Price          | Seats     | Concurrent chips |
| ---- | -------------- | --------- | ---------------- |
| Free | £0             | 1         | 3                |
| Pro  | £45 per month  | 1         | 10               |
| Team | £185 per month | unlimited | 50               |

Submitting beyond your limit is refused with `CONCURRENCY_LIMIT`; the job is not queued. Team is not yet self-service. Ask C3 to enable it for your account.

```
c3 upgrade            # interactive picker
c3 upgrade pro        # opens checkout the first time
c3 upgrade free       # cancel at the end of the billing period
c3 upgrade free -y    # the same without confirmation, for scripts
```

Downgrades and cancellations take effect at the end of the current period. Running `c3 upgrade <current plan>` cancels a pending change. The [subscription page](https://cthree.cloud/dashboard/subscription) does the same.

## Storage[​](#storage "Direct link to Storage")

Datasets, uploaded workspaces and job artifacts count towards storage usage, measured on unique bytes after deduplication. `c3 balance` shows the current figure. No plan has a storage quota; storage is billed on usage.