> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.apotheo.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Changing a Billing Date

You can adjust a client's paid-until date to extend or shorten their current billing period. If the client has an active subscription, Apotheo can automatically calculate proration.

## How to Change the Billing Date

1. Navigate to **Clients** and open the client's profile
2. Click the **Billing** tab
3. Find the **Paid Until** field and click **Edit**

![Edit paid-until date](https://storage.crisp.chat/users/helpdesk/website/-/9/1/6/8/916842d9772b4800/payments-edit-paid-until_1qtk8sn.png)

## Setting the Date

Use the date picker to select the new paid-until date. The date must be in the future.

## Proration

If the client has an active subscription, a **Prorate** toggle appears:

### Proration Disabled

The paid-until date is updated but no charge or credit is applied. The next subscription payment will occur on the normal schedule.

### Proration Enabled

When you turn on proration, you'll choose when to apply it:

- **Now** — the prorated charge or credit is applied immediately
- **Next invoice** — the prorated amount is added to or deducted from the client's next invoice

The dialog shows the calculated proration amount:

- If you're **extending** the period, the client will be charged for the additional days
- If you're **shortening** the period, the client will receive a credit for the unused days

## Example

A client is on a $100/month subscription billed on the 1st. You change their paid-until date from March 1 to March 15 with proration enabled:

- The client receives a credit for 14 unused days
- The credit is applied either now or on their next invoice, depending on your selection

## Tips

- Use this feature when clients need a billing date adjustment (e.g. aligning with their pay schedule)
- Proration ensures fairness when changing dates mid-cycle
- Check the calculated amount in the dialog before saving to avoid surprises