PMPRO Proration Addon
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About PMPRO Proration Addon
A plan change is when members scrutinize the invoice
A member who wants to move from a monthly plan to an annual one, or from a high tier to a cheaper one, always asks the same question: how much will I be charged now? Paid Memberships Pro does not calculate prorations by default, so each site ends up handling these cases by hand.
PMPRO Proration Addon gives each case a clear answer at checkout itself.
What PMPRO Proration Addon calculates when a level changes, and where it stops
The add-on calls an upgrade any change where the prorated amount is greater than zero, and a downgrade any change where it is zero or less. Depending on the case, it does this:
- Same billing period (monthly to monthly, for example): it charges based on the days left in the period and the prices of the old and new levels. The recurring payment date stays the same and the subscription changes to charge the new amount.
- Different period (monthly to annual): it charges the initial payment of the new level minus a credit calculated from the days remaining and the subtotal of the last order. The recurring date resets: one payment period of the new level from the day of checkout.
- Delayed downgrade: nothing is charged at that moment. The member keeps access until the end of the period already paid, then moves to the lower level and payments for that level begin.
- One or several active levels: it works on sites where a member can hold a single level or more than one.
It is worth knowing the limits beforehand. It has no settings screen. It only prorates within level groups that allow one level per group (the classic tiered setup) and only when the change removes another level; in groups that let members pick several levels at once, it does not prorate. And it does not pay out balances: if the calculation comes out negative, the member pays nothing but the leftover credit is lost (in the examples below it would have been $2.50 or $312.50).
Six plan changes and the amount charged
| Change | Point in the cycle | Charge |
| From $5/month to $10/month | Day 15 (halfway through the cycle) | $2.50, immediate upgrade |
| From $250/year to $500/year | Month 3 (a quarter of the cycle) | $187.50, immediate upgrade |
| From $10/month to $5/month | Day 15 | $0, downgrade at the end of the month |
| From $500/year to $250/year | Month 3 | $0, downgrade at the end of the year |
| From $10/month to $200/year | Day 1 | $190, immediate upgrade |
| From $10/month to $200/year | Day 15 | $195, immediate upgrade |
In the last two cases the renewal date resets to one year from checkout.
Frequently asked questions about PMPRO Proration Addon
Does it refund money when a member downgrades?
No. The add-on does not prorate below zero. Instead of a refund or a credit, it delays the downgrade until the period the member already paid for ends.
Does it work for moving from monthly to annual?
Yes. The initial payment of the new level is charged minus the credit for the unused time, and the next renewal comes one year after checkout.
Can I change the calculation rules?
It implements the most common rules and allows customization with code, including the definition of what counts as a downgrade. If your pricing model is very particular, you will need someone who can program.
Does it work without Paid Memberships Pro?
No. It is an add-on for that plugin and needs it installed and active.
The rules are adjusted with code, not with a panel
Every membership site has its own idea of what a fair proration is, and the add-on accepts that: it applies a general rule and leaves action and filter hooks for anyone who wants to modify it. Those hooks allow, for example, redefining what counts as a downgrade. If you don't code, stick with the default rules and check that they fit your prices.
For changes between levels with the same period, there can be differences of one or two days in the payment date because months have different lengths.
Once activated it prorates right away, so test each type of change first
You need Paid Memberships Pro installed and active. Since there are no settings, as soon as you activate the add-on checkout starts showing prorated amounts. Before opening it to your members, simulate three changes in a test environment: an upgrade within the same period, a jump from monthly to annual and a downgrade. Also check that your level groups allow one level per group, because otherwise proration will not apply.
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Version history
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1.0.5 Current 1 Oct 2026
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1.0.4 1 Jun 2026
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1.0.1 6 Feb 2025
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Frequently asked questions
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GPL (General Public License) is the license under which WordPress and most premium plugins/themes are distributed. It grants you the right to use, modify and redistribute the software in as many projects as you want, with no domain restrictions.
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Yes. With membership you get automatic updates via our GPLClub Updater plugin (installed on your WP, detects new versions and applies them). With individual purchase, you get one year of manual updates from your account.
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Depends on the plan. Monthly: 3 domains. Semi-annual: 7. Annual and Lifetime: 15. Individual purchase: 1 domain.
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GPLClub offers its own support for installation, configuration and compatibility. For direct support from the original author (feature requests, product-specific bugs), a license purchased from the author is required.
