diff --git a/app/Http/Controllers/Settings/SubscriptionController.php b/app/Http/Controllers/Settings/SubscriptionController.php
index 1957a7c65..f3b6e3997 100644
--- a/app/Http/Controllers/Settings/SubscriptionController.php
+++ b/app/Http/Controllers/Settings/SubscriptionController.php
@@ -115,7 +115,7 @@ public function change(Request $request, Tier $tier)
         $period = $request->get('period') === 'yearly' ? PricingPeriod::Yearly : PricingPeriod::Monthly;
 
         // If the user has a cancelled sub still ending
-        if ($user->subscribed('kanka') && $user->subscription('kanka')->onGracePeriod()) {
+        if ($user->subscribed('kanka') && $user->subscription('kanka')->onGracePeriod() && !$user->hasPayPal()) {
             return view('settings.subscription.change_blocked')
                 ->with('user', $user);
         }
diff --git a/app/Services/PayPalService.php b/app/Services/PayPalService.php
index 2c4a0d6a8..ea68d2063 100644
--- a/app/Services/PayPalService.php
+++ b/app/Services/PayPalService.php
@@ -47,9 +47,9 @@ public function process(): mixed
                 $oldPrice = $tier->yearly;
             }
             // @phpstan-ignore-next-line
-            $price = (floatval($price) - ($oldPrice)) * ($this->user->subscriptions()->first()->ends_at->diffInDays(Carbon::now()) / 365);
-            $price = number_format($price, 2);
+            $price = round(($price - ($oldPrice)) * ($this->user->subscriptions()->first()->ends_at->diffInDays(Carbon::now(), true) / 365), 2);
         }
+        $price = max(0, $price);
 
         $provider = new PayPal();
         $provider->setApiCredentials(config('paypal'));