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Looking to leverage FastSpring’s subscription capabilities and want to try out the preview API for yourself? Sign up for a demo or check out our free trial.

Already a FastSpring seller and want to enable the Proration Preview API for your store? Or, do you just want to get into the technical details of the new Proration Preview API? Everything you need to know can be found in our product documentation and API documentation.


These days, subscriptions are a key part of many online businesses. As SaaS takes on more market share, the need to help current and prospective customers understand costs related to subscription changes grows. Today, we’re happy to share that we’ve developed a new Proration Preview API that allows you to serve up estimates of proposed plan changes directly within your account management portal. 

A screenshot of the FastSpring proration preview screen.

As the only merchant of record that presents both a view of the current and proposed plans simultaneously, FastSpring is uniquely suited to help as you strive to grow customer accounts and reduce account churn. By using Proration Preview API, your buyers can see exactly what account changes are going to cost, what charges might be due, and what credits they might be getting for something they’ve paid for but haven’t used yet. This information is invaluable to help your customers make informed decisions as they look to use your products.

With Proration Preview API, FastSpring helps increase customer satisfaction, reduce customer churn, and improve account growth by communicating clearly with your customers about plan changes.

Want to know more about Proration Preview API or how using a merchant of record can help your business grow by 45% in the first year? Talk to our team today or sign up for a free account and see for yourself.

Braden Steel
Braden Steel Author
Braden is the Senior Product Marketing Manager for FastSpring. When he's not bringing new products to market, he spends his time writing fantasy novels.