diff --git a/src/app/Console/Commands/DomainSetWallet.php b/src/app/Console/Commands/DomainSetWallet.php
--- a/src/app/Console/Commands/DomainSetWallet.php
+++ b/src/app/Console/Commands/DomainSetWallet.php
@@ -60,6 +60,7 @@
                 'wallet_id' => $wallet->id,
                 'sku_id' => $sku->id,
                 'cost' => 0,
+                'fee' => 0,
                 'entitleable_id' => $domain->id,
                 'entitleable_type' => Domain::class,
             ]
diff --git a/src/app/Domain.php b/src/app/Domain.php
--- a/src/app/Domain.php
+++ b/src/app/Domain.php
@@ -89,6 +89,7 @@
                         'wallet_id' => $wallet_id,
                         'sku_id' => $sku->id,
                         'cost' => $sku->pivot->cost(),
+                        'fee' => $sku->fee,
                         'entitleable_id' => $this->id,
                         'entitleable_type' => Domain::class
                     ]
diff --git a/src/app/Entitlement.php b/src/app/Entitlement.php
--- a/src/app/Entitlement.php
+++ b/src/app/Entitlement.php
@@ -11,10 +11,18 @@
  *
  * Owned by a {@link \App\User}, billed to a {@link \App\Wallet}.
  *
- * @property \App\User $owner                   The owner of this entitlement (subject).
- * @property \App\Sku $sku                      The SKU to which this entitlement applies.
- * @property \App\Wallet $wallet                The wallet to which this entitlement is charged.
- * @property \App\Domain|\App\User $entitleable The entitled object (receiver of the entitlement).
+ * @property int                   $cost
+ * @property ?string               $description
+ * @property \App\Domain|\App\User $entitleable      The entitled object (receiver of the entitlement).
+ * @property int                   $entitleable_id
+ * @property string                $entitleable_type
+ * @property int                   $fee
+ * @property string                $id
+ * @property \App\User             $owner            The owner of this entitlement (subject).
+ * @property \App\Sku              $sku              The SKU to which this entitlement applies.
+ * @property string                $sku_id
+ * @property \App\Wallet           $wallet           The wallet to which this entitlement is charged.
+ * @property string                $wallet_id
  */
 class Entitlement extends Model
 {
@@ -45,11 +53,13 @@
         'entitleable_id',
         'entitleable_type',
         'cost',
-        'description'
+        'description',
+        'fee',
     ];
 
     protected $casts = [
         'cost' => 'integer',
+        'fee' => 'integer'
     ];
 
     /**
diff --git a/src/app/Group.php b/src/app/Group.php
--- a/src/app/Group.php
+++ b/src/app/Group.php
@@ -64,6 +64,7 @@
             'wallet_id' => $wallet->id,
             'sku_id' => $sku->id,
             'cost' => $exists >= $sku->units_free ? $sku->cost : 0,
+            'fee' => $exists >= $sku->units_free ? $sku->fee : 0,
             'entitleable_id' => $this->id,
             'entitleable_type' => Group::class
         ]);
diff --git a/src/app/Observers/EntitlementObserver.php b/src/app/Observers/EntitlementObserver.php
--- a/src/app/Observers/EntitlementObserver.php
+++ b/src/app/Observers/EntitlementObserver.php
@@ -123,6 +123,7 @@
             return;
         }
 
+        $fee = 0;
         $cost = 0;
         $now = Carbon::now();
 
@@ -132,6 +133,7 @@
         // just in case this had not been billed yet, ever
         $diffInMonths = $entitlement->updated_at->diffInMonths($now);
         $cost += (int) ($entitlement->cost * $discount * $diffInMonths);
+        $fee += (int) ($entitlement->fee * $diffInMonths);
 
         // this moves the hypothetical updated at forward to however many months past the original
         $updatedAt = $entitlement->updated_at->copy()->addMonthsWithoutOverflow($diffInMonths);
@@ -153,8 +155,18 @@
         }
 
         $pricePerDay = $entitlement->cost / $daysInMonth;
+        $feePerDay = $entitlement->fee / $daysInMonth;
 
         $cost += (int) (round($pricePerDay * $discount * $diffInDays, 0));
+        $fee += (int) (round($feePerDay * $diffInDays, 0));
+
+        $profit = $cost - $fee;
+
+        if ($profit != 0 && $owner->tenant && ($wallet = $owner->tenant->wallet()) {
+            $desc = "Charged user {$this->owner->email}";
+            $method = $profit > 0 ? 'credit' : 'debit';
+            $wallet->{$method}(abs($profit), $desc);
+        }
 
         if ($cost == 0) {
             return;
diff --git a/src/app/Observers/PackageObserver.php b/src/app/Observers/PackageObserver.php
--- a/src/app/Observers/PackageObserver.php
+++ b/src/app/Observers/PackageObserver.php
@@ -27,5 +27,7 @@
                 break;
             }
         }
+
+        $package->tenant_id = \config('app.tenant_id');
     }
 }
diff --git a/src/app/Observers/PackageSkuObserver.php b/src/app/Observers/PackageSkuObserver.php
--- a/src/app/Observers/PackageSkuObserver.php
+++ b/src/app/Observers/PackageSkuObserver.php
@@ -6,6 +6,25 @@
 
 class PackageSkuObserver
 {
+    /**
+     * Handle the "creating" event on an PackageSku relation.
+     *
+     * Ensures that the entries belong to the same tenant.
+     *
+     * @param \App\PackageSku $packageSku The package-sku relation
+     *
+     * @return void
+     */
+    public function creating(PackageSku $packageSku)
+    {
+        $package = $packageSku->package;
+        $sku = $packageSku->sku;
+
+        if ($package->tenant_id != $sku->tenant_id) {
+            throw new \Exception("Package and SKU owned by different tenants");
+        }
+    }
+
     /**
      * Handle the "created" event on an PackageSku relation
      *
diff --git a/src/app/Observers/PlanObserver.php b/src/app/Observers/PlanObserver.php
--- a/src/app/Observers/PlanObserver.php
+++ b/src/app/Observers/PlanObserver.php
@@ -27,5 +27,7 @@
                 break;
             }
         }
+
+        $plan->tenant_id = \config('app.tenant_id');
     }
 }
diff --git a/src/app/Observers/PlanPackageObserver.php b/src/app/Observers/PlanPackageObserver.php
new file mode 100644
--- /dev/null
+++ b/src/app/Observers/PlanPackageObserver.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Observers;
+
+use App\PlanPackage;
+
+class PlanPackageObserver
+{
+    /**
+     * Handle the "creating" event on an PlanPackage relation.
+     *
+     * Ensures that the entries belong to the same tenant.
+     *
+     * @param \App\PlanPackage $planPackage The plan-package relation
+     *
+     * @return void
+     */
+    public function creating(PlanPackage $planPackage)
+    {
+        $package = $planPackage->package;
+        $plan = $planPackage->plan;
+
+        if ($package->tenant_id != $plan->tenant_id) {
+            throw new \Exception("Package and Plan owned by different tenants");
+        }
+    }
+}
diff --git a/src/app/Observers/SkuObserver.php b/src/app/Observers/SkuObserver.php
--- a/src/app/Observers/SkuObserver.php
+++ b/src/app/Observers/SkuObserver.php
@@ -22,5 +22,9 @@
                 break;
             }
         }
+
+        $sku->tenant_id = \config('app.tenant_id');
+
+        // TODO: We should make sure that tenant_id + title is unique
     }
 }
diff --git a/src/app/Package.php b/src/app/Package.php
--- a/src/app/Package.php
+++ b/src/app/Package.php
@@ -21,6 +21,13 @@
  * * Free package: mailbox + quota.
  *
  * Selecting a package will therefore create a set of entitlments from SKUs.
+ *
+ * @property string  $description
+ * @property int     $discount_rate
+ * @property string  $id
+ * @property string  $name
+ * @property ?int    $tenant_id
+ * @property string  $title
  */
 class Package extends Model
 {
@@ -69,7 +76,10 @@
         return $costs;
     }
 
-    public function isDomain()
+    /**
+     * Checks whether the package contains a domain SKU.
+     */
+    public function isDomain(): bool
     {
         foreach ($this->skus as $sku) {
             if ($sku->handler_class::entitleableClass() == \App\Domain::class) {
@@ -94,4 +104,14 @@
             ['qty']
         );
     }
+
+    /**
+     * The tenant for this package.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function tenant()
+    {
+        return $this->belongsTo('App\Tenant', 'tenant_id', 'id');
+    }
 }
diff --git a/src/app/Plan.php b/src/app/Plan.php
--- a/src/app/Plan.php
+++ b/src/app/Plan.php
@@ -13,7 +13,16 @@
  * A "Family Plan" as such may exist of "2 or more Kolab packages",
  * and apply a discount for the third and further Kolab packages.
  *
+ * @property string         $description
+ * @property int            $discount_qty
+ * @property int            $discount_rate
+ * @property string         $id
+ * @property string         $name
  * @property \App\Package[] $packages
+ * @property datetime       $promo_from
+ * @property datetime       $promo_to
+ * @property ?int           $tenant_id
+ * @property string         $title
  */
 class Plan extends Model
 {
@@ -105,4 +114,14 @@
 
         return false;
     }
+
+    /**
+     * The tenant for this plan.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function tenant()
+    {
+        return $this->belongsTo('App\Tenant', 'tenant_id', 'id');
+    }
 }
diff --git a/src/app/PlanPackage.php b/src/app/PlanPackage.php
--- a/src/app/PlanPackage.php
+++ b/src/app/PlanPackage.php
@@ -15,6 +15,7 @@
  * @property int          $qty_max
  * @property int          $qty_min
  * @property \App\Package $package
+ * @property \App\Plan    $plan
  */
 class PlanPackage extends Pivot
 {
@@ -54,8 +55,23 @@
         return $costs;
     }
 
+    /**
+     * The package in this relation.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
     public function package()
     {
         return $this->belongsTo('App\Package');
     }
+
+    /**
+     * The plan in this relation.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function plan()
+    {
+        return $this->belongsTo('App\Plan');
+    }
 }
diff --git a/src/app/Providers/AppServiceProvider.php b/src/app/Providers/AppServiceProvider.php
--- a/src/app/Providers/AppServiceProvider.php
+++ b/src/app/Providers/AppServiceProvider.php
@@ -35,6 +35,7 @@
         \App\Package::observe(\App\Observers\PackageObserver::class);
         \App\PackageSku::observe(\App\Observers\PackageSkuObserver::class);
         \App\Plan::observe(\App\Observers\PlanObserver::class);
+        \App\PlanPackage::observe(\App\Observers\PlanPackageObserver::class);
         \App\SignupCode::observe(\App\Observers\SignupCodeObserver::class);
         \App\SignupInvitation::observe(\App\Observers\SignupInvitationObserver::class);
         \App\Sku::observe(\App\Observers\SkuObserver::class);
diff --git a/src/app/Providers/PaymentProvider.php b/src/app/Providers/PaymentProvider.php
--- a/src/app/Providers/PaymentProvider.php
+++ b/src/app/Providers/PaymentProvider.php
@@ -261,6 +261,8 @@
         $refund['status'] = self::STATUS_PAID;
         $refund['amount'] = -1 * $amount;
 
+        // FIXME: Refunds/chargebacks are out of the reseller comissioning for now
+
         $this->storePayment($refund, $wallet->id);
     }
 
diff --git a/src/app/Sku.php b/src/app/Sku.php
--- a/src/app/Sku.php
+++ b/src/app/Sku.php
@@ -7,6 +7,18 @@
 
 /**
  * The eloquent definition of a Stock Keeping Unit (SKU).
+ *
+ * @property bool    $active
+ * @property int     $cost
+ * @property string  $description
+ * @property int     $fee           The fee that the tenant pays to us
+ * @property string  $handler_class
+ * @property string  $id
+ * @property string  $name
+ * @property string  $period
+ * @property ?int    $tenant_id
+ * @property string  $title
+ * @property int     $units_free
  */
 class Sku extends Model
 {
@@ -23,6 +35,7 @@
         'active',
         'cost',
         'description',
+        'fee',
         'handler_class',
         'name',
         // persist for annual domain registration
@@ -59,4 +72,14 @@
             'package_skus'
         )->using('App\PackageSku')->withPivot(['cost', 'qty']);
     }
+
+    /**
+     * The tenant for this SKU.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function tenant()
+    {
+        return $this->belongsTo('App\Tenant', 'tenant_id', 'id');
+    }
 }
diff --git a/src/app/Tenant.php b/src/app/Tenant.php
--- a/src/app/Tenant.php
+++ b/src/app/Tenant.php
@@ -37,4 +37,16 @@
     {
         return $this->hasMany('App\SignupInvitation');
     }
+
+    /*
+     * Returns the wallet of the tanant (reseller's wallet).
+     *
+     * @return ?\App\Wallet A wallet object
+     */
+    public function wallet(): ?Wallet
+    {
+        \App\User::where('role', 'reseller')->where('tenant_id', $this->id)->first();
+
+        return $user ? $user->wallets->first() : null;
+    }
 }
diff --git a/src/app/User.php b/src/app/User.php
--- a/src/app/User.php
+++ b/src/app/User.php
@@ -126,6 +126,7 @@
                         'wallet_id' => $wallet_id,
                         'sku_id' => $sku->id,
                         'cost' => $sku->pivot->cost(),
+                        'fee' => $sku->fee,
                         'entitleable_id' => $user->id,
                         'entitleable_type' => User::class
                     ]
@@ -179,6 +180,7 @@
                 'wallet_id' => $wallet->id,
                 'sku_id' => $sku->id,
                 'cost' => $exists >= $sku->units_free ? $sku->cost : 0,
+                'fee' => $exists >= $sku->units_free ? $sku->fee : 0,
                 'entitleable_id' => $this->id,
                 'entitleable_type' => User::class
             ]);
diff --git a/src/app/Wallet.php b/src/app/Wallet.php
--- a/src/app/Wallet.php
+++ b/src/app/Wallet.php
@@ -76,6 +76,7 @@
             return 0;
         }
 
+        $profit = 0;
         $charges = 0;
         $discount = $this->getDiscountRate();
 
@@ -101,8 +102,10 @@
                 $diff = $entitlement->updated_at->diffInMonths(Carbon::now());
 
                 $cost = (int) ($entitlement->cost * $discount * $diff);
+                $fee = (int) ($entitlement->fee * $diff);
 
                 $charges += $cost;
+                $profit += $cost - $fee;
 
                 // if we're in dry-run, you know...
                 if (!$apply) {
@@ -127,6 +130,16 @@
 
         if ($apply) {
             $this->debit($charges, $entitlementTransactions);
+
+            // Credit/debit the reseller
+            if ($profit != 0 && $this->owner->tenant) {
+                // FIXME: Should we have a simpler way to skip this for non-reseller tenant(s)
+                if ($wallet = $this->owner->tenant->wallet()) {
+                    $desc = "Charged user {$this->owner->email}";
+                    $method = $profit > 0 ? 'credit' : 'debit';
+                    $wallet->{$method}(abs($profit), $desc);
+                }
+            }
         }
 
         DB::commit();
diff --git a/src/database/migrations/2020_10_29_100000_add_beta_skus.php b/src/database/migrations/2020_10_29_100000_add_beta_skus.php
--- a/src/database/migrations/2020_10_29_100000_add_beta_skus.php
+++ b/src/database/migrations/2020_10_29_100000_add_beta_skus.php
@@ -14,31 +14,7 @@
      */
     public function up()
     {
-        if (!\App\Sku::where('title', 'beta')->first()) {
-            \App\Sku::create([
-                'title' => 'beta',
-                'name' => 'Beta program',
-                'description' => 'Access to beta program subscriptions',
-                'cost' => 0,
-                'units_free' => 0,
-                'period' => 'monthly',
-                'handler_class' => 'App\Handlers\Beta',
-                'active' => false,
-            ]);
-        }
-
-        if (!\App\Sku::where('title', 'meet')->first()) {
-            \App\Sku::create([
-                'title' => 'meet',
-                'name' => 'Video chat',
-                'description' => 'Video conferencing tool',
-                'cost' => 0,
-                'units_free' => 0,
-                'period' => 'monthly',
-                'handler_class' => 'App\Handlers\Beta\Meet',
-                'active' => true,
-            ]);
-        }
+        // empty
     }
 
     /**
diff --git a/src/database/migrations/2020_12_28_140000_create_groups_table.php b/src/database/migrations/2020_12_28_140000_create_groups_table.php
--- a/src/database/migrations/2020_12_28_140000_create_groups_table.php
+++ b/src/database/migrations/2020_12_28_140000_create_groups_table.php
@@ -28,19 +28,6 @@
                 $table->primary('id');
             }
         );
-
-        if (!\App\Sku::where('title', 'group')->first()) {
-            \App\Sku::create([
-                'title' => 'group',
-                'name' => 'Group',
-                'description' => 'Distribution list',
-                'cost' => 0,
-                'units_free' => 0,
-                'period' => 'monthly',
-                'handler_class' => 'App\Handlers\Group',
-                'active' => true,
-            ]);
-        }
     }
 
     /**
diff --git a/src/database/migrations/2021_01_26_150000_change_sku_descriptions.php b/src/database/migrations/2021_01_26_150000_change_sku_descriptions.php
--- a/src/database/migrations/2021_01_26_150000_change_sku_descriptions.php
+++ b/src/database/migrations/2021_01_26_150000_change_sku_descriptions.php
@@ -15,14 +15,20 @@
     public function up()
     {
         $beta_sku = \App\Sku::where('title', 'beta')->first();
-        $beta_sku->name = 'Private Beta (invitation only)';
-        $beta_sku->description = 'Access to the private beta program subscriptions';
-        $beta_sku->save();
+
+        if ($beta_sku) {
+            $beta_sku->name = 'Private Beta (invitation only)';
+            $beta_sku->description = 'Access to the private beta program subscriptions';
+            $beta_sku->save();
+        }
 
         $meet_sku = \App\Sku::where('title', 'meet')->first();
-        $meet_sku->name = 'Voice & Video Conferencing (public beta)';
-        $meet_sku->handler_class = 'App\Handlers\Meet';
-        $meet_sku->save();
+
+        if ($meet_sku) {
+            $meet_sku->name = 'Voice & Video Conferencing (public beta)';
+            $meet_sku->handler_class = 'App\Handlers\Meet';
+            $meet_sku->save();
+        }
     }
 
     /**
diff --git a/src/database/migrations/2021_02_19_093832_discounts_add_tenant_id.php b/src/database/migrations/2021_02_19_093832_discounts_add_tenant_id.php
--- a/src/database/migrations/2021_02_19_093832_discounts_add_tenant_id.php
+++ b/src/database/migrations/2021_02_19_093832_discounts_add_tenant_id.php
@@ -17,7 +17,7 @@
         Schema::table(
             'discounts',
             function (Blueprint $table) {
-                $table->bigInteger('tenant_id')->unsigned()->default(\config('app.tenant_id'))->nullable();
+                $table->bigInteger('tenant_id')->unsigned()->nullable();
 
                 $table->foreign('tenant_id')->references('id')->on('tenants')->onDelete('set null');
             }
diff --git a/src/database/migrations/2021_02_19_093833_domains_add_tenant_id.php b/src/database/migrations/2021_02_19_093833_domains_add_tenant_id.php
--- a/src/database/migrations/2021_02_19_093833_domains_add_tenant_id.php
+++ b/src/database/migrations/2021_02_19_093833_domains_add_tenant_id.php
@@ -17,7 +17,7 @@
         Schema::table(
             'domains',
             function (Blueprint $table) {
-                $table->bigInteger('tenant_id')->unsigned()->default(\config('app.tenant_id'))->nullable();
+                $table->bigInteger('tenant_id')->unsigned()->nullable();
 
                 $table->foreign('tenant_id')->references('id')->on('tenants')->onDelete('set null');
             }
diff --git a/src/database/migrations/2021_04_09_100000_tenant_comissioning.php b/src/database/migrations/2021_04_09_100000_tenant_comissioning.php
new file mode 100644
--- /dev/null
+++ b/src/database/migrations/2021_04_09_100000_tenant_comissioning.php
@@ -0,0 +1,71 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+// phpcs:ignore
+class TenantComissioning extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        // Add tenant_id columns
+        foreach (['plans', 'packages', 'skus'] as $table) {
+            Schema::table(
+                $table,
+                function (Blueprint $table) {
+                    $table->bigInteger('tenant_id')->unsigned()->nullable();
+
+                    $table->foreign('tenant_id')->references('id')->on('tenants')
+                        ->onDelete('cascade')->onUpdate('cascade');
+                }
+            );
+        }
+
+        // Add fee column
+        foreach (['entitlements', 'skus'] as $table) {
+            Schema::table(
+                $table,
+                function (Blueprint $table) {
+                    $table->integer('fee')->nullable();
+                }
+            );
+        }
+
+        // FIXME: Should we also have package_skus.fee ?
+        //        We have package_skus.cost, but I think it is not used anywhere.
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        foreach (['plans', 'packages', 'skus'] as $table) {
+            Schema::table(
+                $table,
+                function (Blueprint $table) {
+                    $table->dropForeign(['tenant_id']);
+                    $table->dropColumn('tenant_id');
+                }
+            );
+        }
+
+        foreach (['entitlements', 'skus'] as $table) {
+            Schema::table(
+                $table,
+                function (Blueprint $table) {
+                    $table->dropColumn('fee');
+                }
+            );
+        }
+    }
+}