Client wants to keep this online store up, how long am I able to offer this?

Hi,

Forms have no expiration unless you set it. However, free accounts have certain limits. For example, a free account is limited to 100 submissions and 10 payment submissions per month only.

Please check this link to know the features and limits of each subscription plan: https://www.jotform.com/pricing/

To know more about your account usage, check this guide: https://www.jotform.com/help/408-understanding-your-account-usage-and-limits

Let us know if you have further questions. Thank you.