diff --git a/src/.env.example b/src/.env.example
--- a/src/.env.example
+++ b/src/.env.example
@@ -172,3 +172,4 @@
 
 KB_ACCOUNT_DELETE=
 KB_ACCOUNT_SUSPENDED=
+KB_PAYMENT_SYSTEM=
diff --git a/src/app/Console/Commands/Wallet/TrialEndCommand.php b/src/app/Console/Commands/Wallet/TrialEndCommand.php
new file mode 100644
--- /dev/null
+++ b/src/app/Console/Commands/Wallet/TrialEndCommand.php
@@ -0,0 +1,52 @@
+<?php
+
+namespace App\Console\Commands\Wallet;
+
+use App\Console\Command;
+
+class TrialEndCommand extends Command
+{
+    /**
+     * The name and signature of the console command.
+     *
+     * @var string
+     */
+    protected $signature = 'wallet:trial-end';
+
+    /**
+     * The console command description.
+     *
+     * @var string
+     */
+    protected $description = 'Notifiy wallet (account) owners about en end of the trial period.';
+
+    /**
+     * Execute the console command.
+     *
+     * @return mixed
+     */
+    public function handle()
+    {
+        // Get all wallets, excluding deleted accounts
+        $wallets = \App\Wallet::select('wallets.*')
+            ->join('users', 'users.id', '=', 'wallets.user_id')
+            ->leftJoin('wallet_settings', function ($join) {
+                $join->on('wallet_settings.wallet_id', '=', 'wallets.id')
+                    ->where('wallet_settings.key', 'trial_end_notice');
+            })
+            ->withEnvTenantContext('users')
+            ->whereNull('users.deleted_at')
+            ->where('users.status', '&', \App\User::STATUS_IMAP_READY)
+            ->whereDate('users.created_at', \now()->subMonthNoOverflow())
+            ->whereNull('wallet_settings.value')
+            ->cursor();
+
+        foreach ($wallets as $wallet) {
+            // Send the email asynchronously
+            \App\Jobs\TrialEndEmail::dispatch($wallet->owner);
+
+            // Store the timestamp
+            $wallet->setSetting('trial_end_notice', (string) \now());
+        }
+    }
+}
diff --git a/src/app/Console/Kernel.php b/src/app/Console/Kernel.php
--- a/src/app/Console/Kernel.php
+++ b/src/app/Console/Kernel.php
@@ -16,25 +16,20 @@
      */
     protected function schedule(Schedule $schedule)
     {
-        // This command imports countries and the current set of IPv4 and IPv6 networks allocated to countries.
+        // This imports countries and the current set of IPv4 and IPv6 networks allocated to countries.
         $schedule->command('data:import')->dailyAt('05:00');
 
         // This notifies users about coming password expiration
         $schedule->command('password:retention')->dailyAt('06:00');
 
-        // These apply wallet charges
-        $schedule->command('wallet:charge')->dailyAt('00:00');
-        $schedule->command('wallet:charge')->dailyAt('04:00');
-        $schedule->command('wallet:charge')->dailyAt('08:00');
-        $schedule->command('wallet:charge')->dailyAt('12:00');
-        $schedule->command('wallet:charge')->dailyAt('16:00');
-        $schedule->command('wallet:charge')->dailyAt('20:00');
+        // This applies wallet charges
+        $schedule->command('wallet:charge')->everyFourHours();
 
-        // this is a laravel 8-ism
-        //$schedule->command('wallet:charge')->everyFourHours();
-
-        // This command removes deleted storage files/file chunks from the filesystem
+        // This removes deleted storage files/file chunks from the filesystem
         $schedule->command('fs:expunge')->hourly();
+
+        // This notifies users about an end of the trial period
+        $schedule->command('wallet:trial-end')->dailyAt('07:00');
     }
 
     /**
diff --git a/src/app/Jobs/TrialEndEmail.php b/src/app/Jobs/TrialEndEmail.php
new file mode 100644
--- /dev/null
+++ b/src/app/Jobs/TrialEndEmail.php
@@ -0,0 +1,65 @@
+<?php
+
+namespace App\Jobs;
+
+use App\Mail\TrialEnd;
+use App\User;
+use Illuminate\Bus\Queueable;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Foundation\Bus\Dispatchable;
+use Illuminate\Queue\SerializesModels;
+use Illuminate\Queue\InteractsWithQueue;
+
+class TrialEndEmail implements ShouldQueue
+{
+    use Dispatchable;
+    use InteractsWithQueue;
+    use Queueable;
+    use SerializesModels;
+
+    /** @var int The number of times the job may be attempted. */
+    public $tries = 3;
+
+    /** @var bool Delete the job if its models no longer exist. */
+    public $deleteWhenMissingModels = true;
+
+    /** @var \App\User The account owner */
+    protected $account;
+
+    /**
+     * Create a new job instance.
+     *
+     * @param \App\User $account The account owner
+     *
+     * @return void
+     */
+    public function __construct(User $account)
+    {
+        $this->account = $account;
+    }
+
+    /**
+     * Determine the time at which the job should timeout.
+     *
+     * @return \DateTime
+     */
+    public function retryUntil()
+    {
+        // FIXME: I think it does not make sense to continue trying after 24 hour
+        return now()->addHours(24);
+    }
+
+    /**
+     * Execute the job.
+     *
+     * @return void
+     */
+    public function handle()
+    {
+        \App\Mail\Helper::sendMail(
+            new TrialEnd($this->account),
+            $this->account->tenant_id,
+            ['to' => $this->account->email]
+        );
+    }
+}
diff --git a/src/app/Mail/TrialEnd.php b/src/app/Mail/TrialEnd.php
new file mode 100644
--- /dev/null
+++ b/src/app/Mail/TrialEnd.php
@@ -0,0 +1,75 @@
+<?php
+
+namespace App\Mail;
+
+use App\Tenant;
+use App\User;
+use App\Utils;
+use Illuminate\Bus\Queueable;
+use Illuminate\Mail\Mailable;
+use Illuminate\Queue\SerializesModels;
+
+class TrialEnd extends Mailable
+{
+    use Queueable;
+    use SerializesModels;
+
+    /** @var \App\User An account owner (account) */
+    protected $account;
+
+
+    /**
+     * Create a new message instance.
+     *
+     * @param \App\User $account An account owner (account)
+     *
+     * @return void
+     */
+    public function __construct(User $account)
+    {
+        $this->account = $account;
+    }
+
+    /**
+     * Build the message.
+     *
+     * @return $this
+     */
+    public function build()
+    {
+        $appName = Tenant::getConfig($this->account->tenant_id, 'app.name');
+        $paymentUrl = Tenant::getConfig($this->account->tenant_id, 'app.kb.payment_system');
+        $supportUrl = Tenant::getConfig($this->account->tenant_id, 'app.support_url');
+
+        $subject = \trans('mail.trialend-subject', ['site' => $appName]);
+
+        $this->view('emails.html.trial_end')
+            ->text('emails.plain.trial_end')
+            ->subject($subject)
+            ->with([
+                    'site' => $appName,
+                    'subject' => $subject,
+                    'username' => $this->account->name(true),
+                    'paymentUrl' => $paymentUrl,
+                    'supportUrl' => $supportUrl,
+            ]);
+
+        return $this;
+    }
+
+    /**
+     * Render the mail template with fake data
+     *
+     * @param string $type Output format ('html' or 'text')
+     *
+     * @return string HTML or Plain Text output
+     */
+    public static function fakeRender(string $type = 'html'): string
+    {
+        $user = new User();
+
+        $mail = new self($user);
+
+        return Helper::render($mail, $type);
+    }
+}
diff --git a/src/config/app.php b/src/config/app.php
--- a/src/config/app.php
+++ b/src/config/app.php
@@ -230,6 +230,8 @@
         'account_suspended' => env('KB_ACCOUNT_SUSPENDED'),
         // An article about a way to delete an owned account
         'account_delete' => env('KB_ACCOUNT_DELETE'),
+        // An article about the payment system
+        'payment_system' => env('KB_PAYMENT_SYSTEM'),
     ],
 
     'company' => [
diff --git a/src/resources/lang/en/mail.php b/src/resources/lang/en/mail.php
--- a/src/resources/lang/en/mail.php
+++ b/src/resources/lang/en/mail.php
@@ -107,4 +107,18 @@
     'suspendeddebtor-middle' => "Settle up now to reactivate your account.",
     'suspendeddebtor-cancel' => "Don't want to be our customer anymore? "
         . "Here is how you can cancel your account:",
+
+    'trialend-subject' => ":site: Your trial phase has ended",
+    'trialend-intro' => "We hope you enjoyed the 30 days of free :site trial.",
+    'trialend-body1' => "Starting from today your subscription will be active. Your first subscription fee is due in 4 weeks."
+        . " You can read about how to pay the subscription fee in this knowledge base article:",
+    'trialend-body2' => "You can leave :site at any time, there is no contractual minimum period"
+        . " and your account will in any case be working the next 4 weeks to remove it at no cost."
+        . " You can delete your account via the red [Delete account] button in your profile."
+        . " This will end your subscription and delete all relevant data.",
+    'trialend-body3' => "THIS OPERATION IS IRREVERSIBLE!",
+    'trialend-body4' => "When data is deleted it can not be recovered."
+        . " Please make sure that you have saved all data that you need before pressing the red button.",
+    'trialend-footer' => "Please do not hesitate to contact Support with any questions or concerns.",
+
 ];
diff --git a/src/resources/views/emails/html/trial_end.blade.php b/src/resources/views/emails/html/trial_end.blade.php
new file mode 100644
--- /dev/null
+++ b/src/resources/views/emails/html/trial_end.blade.php
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html lang="{{ str_replace('_', '-', app()->getLocale()) }}">
+    <head>
+        <meta charset="utf-8">
+    </head>
+    <body>
+        <p>{{ __('mail.header', ['name' => $username]) }}</p>
+
+        <p>{{ __('mail.trialend-intro', ['site' => $site]) }}</p>
+        <p>{{ __('mail.trialend-body1', ['site' => $site]) }}</p>
+        <p><a href="{{ $paymentUrl }}">{{ $paymentUrl }}</a></p>
+        <p>{{ __('mail.trialend-body2', ['site' => $site]) }}</p>
+        <p>{{ __('mail.trialend-body3', ['site' => $site]) }}</p>
+        <p>{{ __('mail.trialend-body4', ['site' => $site]) }}</p>
+        <p>{{ __('mail.trialend-footer', ['site' => $site]) }}</p>
+        <p><a href="{{ $supportUrl }}">{{ $supportUrl }}</a></p>
+
+        <p>{{ __('mail.footer1') }}</p>
+        <p>{{ __('mail.footer2', ['site' => $site]) }}</p>
+    </body>
+</html>
diff --git a/src/resources/views/emails/plain/trial_end.blade.php b/src/resources/views/emails/plain/trial_end.blade.php
new file mode 100644
--- /dev/null
+++ b/src/resources/views/emails/plain/trial_end.blade.php
@@ -0,0 +1,21 @@
+{!! __('mail.header', ['name' => $username]) !!}
+
+{!! __('mail.trialend-intro', ['site' => $site]) !!}
+
+{!! __('mail.trialend-body1', ['site' => $site]) !!}
+
+{!! $paymentUrl !!}
+
+{!! __('mail.trialend-body2', ['site' => $site]) !!}
+
+{!! __('mail.trialend-body3', ['site' => $site]) !!}
+
+{!! __('mail.trialend-body4', ['site' => $site]) !!}
+
+{!! __('mail.trialend-footer', ['site' => $site]) !!}
+
+{!! $supportUrl !!}
+
+-- 
+{!! __('mail.footer1') !!}
+{!! __('mail.footer2', ['site' => $site]) !!}
diff --git a/src/tests/Feature/Console/Wallet/TrialEndTest.php b/src/tests/Feature/Console/Wallet/TrialEndTest.php
new file mode 100644
--- /dev/null
+++ b/src/tests/Feature/Console/Wallet/TrialEndTest.php
@@ -0,0 +1,90 @@
+<?php
+
+namespace Tests\Feature\Console\Wallet;
+
+use App\User;
+use Illuminate\Support\Facades\Queue;
+use Tests\TestCase;
+
+class TrialEndTest extends TestCase
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function setUp(): void
+    {
+        parent::setUp();
+
+        $this->deleteTestUser('wallets-controller@kolabnow.com');
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function tearDown(): void
+    {
+        $this->deleteTestUser('wallets-controller@kolabnow.com');
+
+        parent::tearDown();
+    }
+
+    /**
+     * Test command run
+     */
+    public function testHandle(): void
+    {
+        Queue::fake();
+
+        $user = $this->getTestUser('wallets-controller@kolabnow.com', [
+                'status' => User::STATUS_IMAP_READY | User::STATUS_LDAP_READY | User::STATUS_ACTIVE,
+        ]);
+        $wallet = $user->wallets()->first();
+
+        // DB::table('wallets')->update(['created_at' => \now()]);
+
+        // Expect no wallets in after-trial state
+        Queue::fake();
+        $code = \Artisan::call("wallet:trial-end");
+        Queue::assertNothingPushed();
+
+        // Test an email sent
+        $user->created_at = \now()->clone()->subMonthNoOverflow();
+        $user->save();
+
+        Queue::fake();
+        $code = \Artisan::call("wallet:trial-end");
+        Queue::assertPushed(\App\Jobs\TrialEndEmail::class, 1);
+        Queue::assertPushed(\App\Jobs\TrialEndEmail::class, function ($job) use ($user) {
+            $job_user = TestCase::getObjectProperty($job, 'account');
+            return $job_user->id === $user->id;
+        });
+
+        $dt = $wallet->getSetting('trial_end_notice');
+        $this->assertMatchesRegularExpression('/^' . date('Y-m-d') . ' [0-9]{2}:[0-9]{2}:[0-9]{2}$/', $dt);
+
+        // Test no duplicate email sent for the same wallet
+        Queue::fake();
+        $code = \Artisan::call("wallet:trial-end");
+        Queue::assertNothingPushed();
+
+        // Test not imap ready user - no email sent
+        $wallet->setSetting('trial_end_notice', null);
+        $user->status = User::STATUS_NEW | User::STATUS_LDAP_READY | User::STATUS_ACTIVE;
+        $user->save();
+
+        Queue::fake();
+        $code = \Artisan::call("wallet:trial-end");
+        Queue::assertNothingPushed();
+
+        // Test deleted user - no email sent
+        $user->status = User::STATUS_NEW | User::STATUS_LDAP_READY | User::STATUS_ACTIVE | User::STATUS_IMAP_READY;
+        $user->save();
+        $user->delete();
+
+        Queue::fake();
+        $code = \Artisan::call("wallet:trial-end");
+        Queue::assertNothingPushed();
+
+        $this->assertNull($wallet->getSetting('trial_end_notice'));
+    }
+}
diff --git a/src/tests/Feature/Jobs/TrialEndEmailTest.php b/src/tests/Feature/Jobs/TrialEndEmailTest.php
new file mode 100644
--- /dev/null
+++ b/src/tests/Feature/Jobs/TrialEndEmailTest.php
@@ -0,0 +1,62 @@
+<?php
+
+namespace Tests\Feature\Jobs;
+
+use App\Jobs\TrialEndEmail;
+use App\Mail\TrialEnd;
+use Illuminate\Support\Facades\Mail;
+use Tests\TestCase;
+
+class TrialEndEmailTest extends TestCase
+{
+    /**
+     * {@inheritDoc}
+     *
+     * @return void
+     */
+    public function setUp(): void
+    {
+        parent::setUp();
+
+        $this->deleteTestUser('PaymentEmail@UserAccount.com');
+    }
+
+    /**
+     * {@inheritDoc}
+     *
+     * @return void
+     */
+    public function tearDown(): void
+    {
+        $this->deleteTestUser('PaymentEmail@UserAccount.com');
+
+        parent::tearDown();
+    }
+
+    /**
+     * Test job handle
+     *
+     * @return void
+     */
+    public function testHandle()
+    {
+        $user = $this->getTestUser('PaymentEmail@UserAccount.com');
+        $user->setSetting('external_email', 'ext@email.tld');
+
+        Mail::fake();
+
+        // Assert that no jobs were pushed...
+        Mail::assertNothingSent();
+
+        $job = new TrialEndEmail($user);
+        $job->handle();
+
+        // Assert the email sending job was pushed once
+        Mail::assertSent(TrialEnd::class, 1);
+
+        // Assert the mail was sent to the user's email
+        Mail::assertSent(TrialEnd::class, function ($mail) {
+            return $mail->hasTo('paymentemail@useraccount.com') && !$mail->hasCc('ext@email.tld');
+        });
+    }
+}
diff --git a/src/tests/Unit/Mail/TrialEndTest.php b/src/tests/Unit/Mail/TrialEndTest.php
new file mode 100644
--- /dev/null
+++ b/src/tests/Unit/Mail/TrialEndTest.php
@@ -0,0 +1,49 @@
+<?php
+
+namespace Tests\Unit\Mail;
+
+use App\Mail\TrialEnd;
+use App\User;
+use Tests\TestCase;
+
+class TrialEndTest extends TestCase
+{
+    /**
+     * Test email content
+     */
+    public function testBuild(): void
+    {
+        $user = new User();
+
+        \config([
+                'app.support_url' => 'https://kolab.org/support',
+                'app.kb.payment_system' => 'https://kb.kolab.org/payment-system',
+        ]);
+
+        $mail = $this->renderMail(new TrialEnd($user));
+
+        $html = $mail['html'];
+        $plain = $mail['plain'];
+
+        $supportUrl = \config('app.support_url');
+        $supportLink = sprintf('<a href="%s">%s</a>', $supportUrl, $supportUrl);
+        $paymentUrl = \config('app.kb.payment_system');
+        $paymentLink = sprintf('<a href="%s">%s</a>', $paymentUrl, $paymentUrl);
+        $appName = \config('app.name');
+
+        $this->assertSame("$appName: Your trial phase has ended", $mail['subject']);
+
+        $this->assertStringStartsWith('<!DOCTYPE html>', $html);
+        $this->assertTrue(strpos($html, $user->name(true)) > 0);
+        $this->assertTrue(strpos($html, $supportLink) > 0);
+        $this->assertTrue(strpos($html, $paymentLink) > 0);
+        $this->assertTrue(strpos($html, "30 days of free $appName trial") > 0);
+        $this->assertTrue(strpos($html, "$appName Team") > 0);
+
+        $this->assertStringStartsWith('Dear ' . $user->name(true), $plain);
+        $this->assertTrue(strpos($plain, $supportUrl) > 0);
+        $this->assertTrue(strpos($plain, $paymentUrl) > 0);
+        $this->assertTrue(strpos($plain, "30 days of free $appName trial") > 0);
+        $this->assertTrue(strpos($plain, "$appName Team") > 0);
+    }
+}