diff --git a/application/Billing/BillingController.php b/application/Billing/BillingController.php
index b73f955cd..92a330a9c 100644
--- a/application/Billing/BillingController.php
+++ b/application/Billing/BillingController.php
@@ -278,6 +278,7 @@ class BillingController extends mfBaseController {
                 if($contract->billing_period == 1 && ($start_date->format("Y") < 2024 || ($start_date->format("Y") == 2024 && $start_date->format("m") < 7))) {
                     // XXX only for 1st Billing after IVT Import
                     $this->log->debug(__METHOD__.": Ignoring Contract ".$contract->id." with start_date ".$start_date->format("Y-m-d")." because is before this month");
+                    continue;
                 }
 
                 // if contract has cancel date this month
@@ -292,7 +293,6 @@ class BillingController extends mfBaseController {
                     $end_date->modify("-1 day");
                 }
 
-
                 /*if($contract->price != 0 || $contract->price_setup != 0) {
                     $this->log->debug(__METHOD__.": Ignoring Contract ".$contract->id." because price and price_setup == 0");
                     continue;
@@ -306,12 +306,25 @@ class BillingController extends mfBaseController {
                     $first_of_period = clone $start_date;
                     $first_of_period->modify("first day of this month");
 
-                    $total_days = $end_date->diff($first_of_period)->format("%a") + 1;
+                    $last_of_period = clone $start_date;
+                    $last_of_period->modify("last day of this month");
+
+                    $total_days = $last_of_period->diff($first_of_period)->format("%a") + 1;
                     $period_days = ($end_date->diff($start_date)->format("%a")) + 1;
 
                     $pc = $period_days / $total_days * 100;
                     $price = round($contract->price / 100 * $pc, 4);
 
+                    /*if($contract->id == 936) {
+                        echo "\n";
+                        echo "first day: ".$first_of_period->format("Y-m-d")."\n";
+                        echo "total_days: $total_days\n";
+                        echo "period_days: $period_days\n";
+                        echo "pc: $pc\n";
+                        echo "price: $price\n";
+                        exit;
+                    }*/
+
                     /*if($contract->id == 8766) {
                         echo "start date: ".$start_date->format("Y-m-d H:i:s") . "<br>";
                         echo "end date: ".$end_date->format("Y-m-d H:i:s") . "<br><br>";