diff --git a/src/app/Console/Commands/WalletCharge.php b/src/app/Console/Commands/WalletCharge.php
--- a/src/app/Console/Commands/WalletCharge.php
+++ b/src/app/Console/Commands/WalletCharge.php
@@ -52,11 +52,6 @@
                 );
 
                 $wallet->chargeEntitlements();
-
-                if ($wallet->balance < 0) {
-                    // Disabled for now
-                    // \App\Jobs\WalletPayment::dispatch($wallet);
-                }
             }
         }
     }
diff --git a/src/app/Console/Commands/WalletUntil.php b/src/app/Console/Commands/WalletUntil.php
new file mode 100644
--- /dev/null
+++ b/src/app/Console/Commands/WalletUntil.php
@@ -0,0 +1,91 @@
+<?php
+
+namespace App\Console\Commands;
+
+use Illuminate\Console\Command;
+
+class WalletUntil extends Command
+{
+    /**
+     * The name and signature of the console command.
+     *
+     * @var string
+     */
+    protected $signature = 'wallet:until {wallet}';
+
+    /**
+     * The console command description.
+     *
+     * @var string
+     */
+    protected $description = 'Show until when the balance on a wallet lasts.';
+
+    /**
+     * Create a new command instance.
+     *
+     * @return void
+     */
+    public function __construct()
+    {
+        parent::__construct();
+    }
+
+    /**
+     * Execute the console command.
+     *
+     * @return mixed
+     */
+    public function handle()
+    {
+        $wallet = \App\Wallet::find($this->argument('wallet'));
+
+        if (!$wallet) {
+            return 1;
+        }
+
+        $balance = $wallet->balance;
+
+        $discount = $wallet->getDiscountRate();
+
+        $costs = 0;
+
+        $fromDate = \Carbon\Carbon::now()->subMonthsWithoutOverflow(6);
+        $toDate = \Carbon\Carbon::now()->subMonthsWithoutOverflow(6);
+
+        $entitlements = \App\Entitlement::where('wallet_id', $wallet->id)->orderBy('updated_at');
+
+        foreach ($entitlements as $entitlement) {
+            if ($entitlement->cost == 0) {
+                continue;
+            }
+
+            if ($entitlement->created_at > $fromDate) {
+                $fromDate = $entitlement->created_at->copy();
+            }
+
+            if ($entitlement->updated_at > $toDate) {
+                $toDate = $entitlement->updated_at->copy();
+            }
+        }
+
+        foreach ($entitlements->get() as $entitlement) {
+            if ($entitlement->cost == 0) {
+                continue;
+            }
+
+            $newToDate = $entitlement->updated_at->copy()->addMonthsWithoutOverflow(1);
+
+            $cost = $discount * $entitlement->cost;
+            $costs += $cost;
+
+            if ($balance >= $cost) {
+                $balance -= $cost;
+                if ($newToDate > $toDate) {
+                    $toDate = $newToDate;
+                }
+            }
+        }
+
+        $this->info("{$wallet->balance} lasts until {$toDate} (a month costs {$costs})");
+    }
+}
diff --git a/src/app/Entitlement.php b/src/app/Entitlement.php
--- a/src/app/Entitlement.php
+++ b/src/app/Entitlement.php
@@ -52,6 +52,26 @@
         'cost' => 'integer',
     ];
 
+    /**
+     * Return the costs per day for this entitlement.
+     *
+     * @return float
+     */
+    public function costsPerDay()
+    {
+        if ($this->cost == 0) {
+            return (float) 0;
+        }
+
+        $discount = $this->wallet->getDiscountRate();
+
+        $daysInLastMonth = \App\Utils::daysInLastMonth();
+
+        $costsPerDay = (float) ($this->cost * $discount) / $daysInLastMonth;
+
+        return $costsPerDay;
+    }
+
     /**
      * Create a transaction record for this entitlement.
      *
diff --git a/src/app/Utils.php b/src/app/Utils.php
--- a/src/app/Utils.php
+++ b/src/app/Utils.php
@@ -24,7 +24,7 @@
         $start = new Carbon('first day of last month');
         $end = new Carbon('last day of last month');
 
-        return $start->diffInDays($end);
+        return $start->diffInDays($end) + 1;
     }
 
     /**
diff --git a/src/tests/Feature/EntitlementTest.php b/src/tests/Feature/EntitlementTest.php
--- a/src/tests/Feature/EntitlementTest.php
+++ b/src/tests/Feature/EntitlementTest.php
@@ -32,6 +32,25 @@
         parent::tearDown();
     }
 
+    public function testCostsPerDay(): void
+    {
+        // 444
+        // 28 days: 15.86
+        // 31 days: 14.32
+        $user = $this->getTestUser('entitlement-test@kolabnow.com');
+        $package = Package::where('title', 'kolab')->first();
+        $mailbox = Sku::where('title', 'mailbox')->first();
+
+        $user->assignPackage($package);
+
+        $entitlement = $user->entitlements->where('sku_id', $mailbox->id)->first();
+
+        $costsPerDay = $entitlement->costsPerDay();
+
+        $this->assertTrue($costsPerDay < 15.86);
+        $this->assertTrue($costsPerDay > 14.32);
+    }
+
     /**
      * Tests for User::AddEntitlement()
      */