Dynamic Subscription Duration in Gravity Forms + Stripe (1 Year, 2 Year, CPT Plans)

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Hi everyone,

I’m working on a setup where I have a Custom Post Type (CPT) called “Plans”, and each plan has a custom field plan_duration (values like 1 year, 2 years).

I want to create a Gravity Form subscription where the billing interval is dynamically set based on the selected plan’s duration. For example:

  • Plan A → 1-year subscription

  • Plan B → 2-year subscription

Here’s what I’ve tried / considered:

  1. Created a Product Field → Subscription in Gravity Forms.

  2. Created a Stripe Feed for subscriptions.

  3. Tried to dynamically populate the subscription interval from the plan_duration field, but Gravity Forms doesn’t natively allow dynamic intervals in the subscription Product Field.

My questions:

  • Is it possible to dynamically set the subscription interval based on a CPT field in Gravity Forms?

  • Do I need to use custom hooks (gform_pre_submission_filter, gform_stripe_subscription_args) to adjust the Stripe subscription before submission?

  • Are there any best practices or examples for handling 1-year vs 2-year subscription intervals dynamically in Gravity Forms?

Any guidance, snippets, or examples would be greatly appreciated!

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