> ## Documentation Index
> Fetch the complete documentation index at: https://docs.incident.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Billing methods and mechanics

> How billing works for monthly and annual plans

Our [pricing](https://incident.io/pricing) is based on the number of Responder and On-call seats you use. Choose monthly or annual billing depending on your plan. Manage your billing information in [Settings → Billing](https://app.incident.io/~/settings/billing).

Both monthly and annual billing are available on Team plans. Pro and Enterprise plans are billed annually only.

## Monthly billing

Available on Team plans only.

We charge at the start of each month based on your seats in-use. On subsequent months, we adjust for any changes:

* If you added seats during the month, we charge for the overage (prorated daily)
* If you removed seats, we credit your account (prorated daily)

Your billing date stays the same each month.

## Annual billing

### Team plan

Pay upfront for 12 months based on the seats you’re using when you sign up. Any overages or downgrades throughout the year are settled on your billing date each month, prorated daily.

### Pro and Enterprise plans

Work with our sales team to estimate the seats you’ll need for the year. We invoice on your service start date.

If you need more seats during the year, you have two options:

* **Co-term contract** — add seats at a reduced rate for the remainder of your current subscription
* **Annual true-up** — we bill at the end of the year for additional seats, prorated daily

## Seat limits

**Team plan:** Add or remove Responder and On-call seats freely — no hard limits.

**Pro and Enterprise plans:** Seat limits are set by your contract. Contact our sales team to increase your limit, either via a co-term contract or at renewal.

For details on what each seat type includes, see [Seat types & viewers](/admin/seat-types).

## FAQs

<AccordionGroup>
  <Accordion title="Do you have a W-9 or W8-BEN form?">
    We’re a UK-based company so we use a W8-BEN form instead of a W-9. You can download our [W8-BEN
    form](https://incident.io/docs/files/W-8BEN-E.pdf).
  </Accordion>

  <Accordion title="How do seat types affect billing?">
    Responder and On-call seats are billed independently. A user with both seats counts against both pools. Viewers are
    free and unlimited on all plans. See [Seat types & viewers](/admin/seat-types) for the full breakdown.
  </Accordion>
</AccordionGroup>