diff --git a/src/Core/Constants.cs b/src/Core/Constants.cs
index b64d46b5b1..52931582e7 100644
--- a/src/Core/Constants.cs
+++ b/src/Core/Constants.cs
@@ -106,7 +106,6 @@ public static class FeatureFlagKeys
     public const string UseTreeWalkerApiForPageDetailsCollection = "use-tree-walker-api-for-page-details-collection";
     public const string ItemShare = "item-share";
     public const string DuoRedirect = "duo-redirect";
-    public const string PM5864DollarThreshold = "PM-5864-dollar-threshold";
     public const string AC2101UpdateTrialInitiationEmail = "AC-2101-update-trial-initiation-email";
     public const string EnableConsolidatedBilling = "enable-consolidated-billing";
     public const string AC1795_UpdatedSubscriptionStatusSection = "AC-1795_updated-subscription-status-section";
diff --git a/src/Core/Services/Implementations/StripePaymentService.cs b/src/Core/Services/Implementations/StripePaymentService.cs
index 1720447b47..7eb2b402bb 100644
--- a/src/Core/Services/Implementations/StripePaymentService.cs
+++ b/src/Core/Services/Implementations/StripePaymentService.cs
@@ -792,19 +792,16 @@ public class StripePaymentService : IPaymentService
         var daysUntilDue = sub.DaysUntilDue;
         var chargeNow = collectionMethod == "charge_automatically";
         var updatedItemOptions = subscriptionUpdate.UpgradeItemsOptions(sub);
-        var isPm5864DollarThresholdEnabled = _featureService.IsEnabled(FeatureFlagKeys.PM5864DollarThreshold);
         var isAnnualPlan = sub?.Items?.Data.FirstOrDefault()?.Plan?.Interval == "year";
 
         var subUpdateOptions = new SubscriptionUpdateOptions
         {
             Items = updatedItemOptions,
-            ProrationBehavior = !isPm5864DollarThresholdEnabled || invoiceNow
-            ? Constants.AlwaysInvoice
-            : Constants.CreateProrations,
+            ProrationBehavior = invoiceNow ? Constants.AlwaysInvoice : Constants.CreateProrations,
             DaysUntilDue = daysUntilDue ?? 1,
             CollectionMethod = "send_invoice"
         };
-        if (!invoiceNow && isAnnualPlan && isPm5864DollarThresholdEnabled && sub.Status.Trim() != "trialing")
+        if (!invoiceNow && isAnnualPlan && sub.Status.Trim() != "trialing")
         {
             subUpdateOptions.PendingInvoiceItemInterval =
                 new SubscriptionPendingInvoiceItemIntervalOptions { Interval = "month" };
@@ -838,7 +835,7 @@ public class StripePaymentService : IPaymentService
             {
                 try
                 {
-                    if (!isPm5864DollarThresholdEnabled && !invoiceNow)
+                    if (invoiceNow)
                     {
                         if (chargeNow)
                         {