How to Modify Existing Subscriptions in Sparkforge

Subscriptions can be updated in place when products, quantities, or dates change. This avoids the cancel-and-recreate dance and keeps billing dates consistent for your customers.

What you can modify

• Add products that share the same billing frequency and currency.
• Remove products so they drop off future billing cycles.
• Adjust the quantity of any product (1 to 1000).
• Change the start date if the subscription is Scheduled but not yet active.
• Update the end date on Active subscriptions.
• Preview every change and the new totals before saving.

Note: proration of charges is not yet supported. The new total applies on the next charge date.

What you need

• Access to Payments → Subscriptions.
• A subscription in Scheduled, Trialing, or Active status.
• Supported payment provider: Stripe, Square, NMI, or Authorize.

Modify a subscription

Step 1: Open the subscription

1. Go to Payments → Subscriptions.
2. Pick the subscription to modify.
3. Open the menu and click Update, or open the Subscription Details page and use Update under Actions.

Step 2: Make changes

• Click + to add a product. Available products match the subscription's billing frequency.
• Use the trash icon to remove a product.
• Adjust the Quantity field to change quantities.
• Edit Start Date for Scheduled subscriptions or End Date for Active subscriptions.

Step 3: Review and save

The preview shows updated products, quantities, dates, and totals. Confirm to apply. New settings take effect on the next billing cycle.

Trial periods on added products

• Products added to an Active subscription skip their trial. Charges apply on the next billing cycle.
• Products added to a Trialing subscription trial until the original subscription's trial date. Charges apply when the trial ends.

Setup fees and coupons

• Setup fees are charged as one-time amounts on the next billing cycle when products with fees are added or quantities of products with fees are increased.
• If the subscription is Trialing, the setup fee is charged when the trial ends.
• An ongoing coupon applies to newly added products from the next billing cycle if the coupon is applicable.

What you cannot do

• Modify subscriptions in Cancelled, Overdue, or Unpaid status. Only Scheduled, Active, and Trialing allow modification.
• Change the charge date itself. All updates apply on the existing billing schedule.

Update card details on file

To update a customer's card without modifying the subscription:

1. Go to Payments → Subscriptions.
2. Open the subscription.
3. Click the three dots on the right.
4. Pick Share Payment Update Link.
5. Send the link by chat, message, or the built-in Email option.

The customer updates their card themselves through the secure link.