diff --git a/database/migrations/0001_01_01_000000_create_tenants_table.php b/database/migrations/0001_01_01_000000_create_tenants_table.php
new file mode 100644
index 0000000..2218f54
--- /dev/null
+++ b/database/migrations/0001_01_01_000000_create_tenants_table.php
@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('tenants', function (Blueprint $table) {
+            $table->id();
+            $table->uuid('uuid')->unique();
+            $table->string('name');
+            $table->enum('type', ['school', 'private', 'system'])->default('private');
+            $table->boolean('active')->default(true);
+            $table->timestamps();
+            $table->softDeletes();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('tenants');
+    }
+};
diff --git a/database/migrations/0001_01_01_000000_create_users_table.php b/database/migrations/0001_01_01_000000_create_users_table.php
index 05fb5d9..2120856 100644
--- a/database/migrations/0001_01_01_000000_create_users_table.php
+++ b/database/migrations/0001_01_01_000000_create_users_table.php
@@ -13,12 +13,18 @@ return new class extends Migration
     {
         Schema::create('users', function (Blueprint $table) {
             $table->id();
+            $table->uuid('uuid')->unique();
+            $table->unsignedBigInteger('tenant_id');
             $table->string('name');
             $table->string('email')->unique();
             $table->timestamp('email_verified_at')->nullable();
             $table->string('password');
             $table->rememberToken();
             $table->timestamps();
+            $table->softDeletes();
+
+            $table->foreign('tenant_id')->references('id')->on('tenants');
+            $table->index('tenant_id');
         });
 
         Schema::create('password_reset_tokens', function (Blueprint $table) {
diff --git a/database/migrations/2026_05_22_005034_create_roles_table.php b/database/migrations/2026_05_22_005034_create_roles_table.php
new file mode 100644
index 0000000..87bd721
--- /dev/null
+++ b/database/migrations/2026_05_22_005034_create_roles_table.php
@@ -0,0 +1,28 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('roles', function (Blueprint $table) {
+            $table->id();
+            $table->string('name')->unique();
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('roles');
+    }
+};
diff --git a/database/migrations/2026_05_22_005035_create_licenses_table.php b/database/migrations/2026_05_22_005035_create_licenses_table.php
new file mode 100644
index 0000000..b590820
--- /dev/null
+++ b/database/migrations/2026_05_22_005035_create_licenses_table.php
@@ -0,0 +1,37 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('licenses', function (Blueprint $table) {
+            $table->id();
+            $table->uuid('uuid')->unique();
+            $table->unsignedBigInteger('tenant_id');
+            $table->enum('type', ['per_student', 'school_flat'])->default('per_student');
+            $table->unsignedInteger('seats')->nullable();
+            $table->date('expires_at')->nullable();
+            $table->boolean('active')->default(true);
+            $table->timestamps();
+            $table->softDeletes();
+
+            $table->foreign('tenant_id')->references('id')->on('tenants');
+            $table->index('tenant_id');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('licenses');
+    }
+};
diff --git a/database/migrations/2026_05_22_005035_create_role_user_table.php b/database/migrations/2026_05_22_005035_create_role_user_table.php
new file mode 100644
index 0000000..69efea5
--- /dev/null
+++ b/database/migrations/2026_05_22_005035_create_role_user_table.php
@@ -0,0 +1,33 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('role_user', function (Blueprint $table) {
+            $table->id(); // AUTO_INCREMENT PK — NOT composite primary key
+            $table->unsignedBigInteger('role_id');
+            $table->unsignedBigInteger('user_id');
+            $table->timestamps();
+
+            $table->unique('user_id'); // 1 role per user enforced at DB level
+            $table->foreign('role_id')->references('id')->on('roles')->cascadeOnDelete();
+            $table->foreign('user_id')->references('id')->on('users')->cascadeOnDelete();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('role_user');
+    }
+};
diff --git a/database/migrations/2026_05_22_005036_create_license_assignments_table.php b/database/migrations/2026_05_22_005036_create_license_assignments_table.php
new file mode 100644
index 0000000..b9bbfb3
--- /dev/null
+++ b/database/migrations/2026_05_22_005036_create_license_assignments_table.php
@@ -0,0 +1,33 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('license_assignments', function (Blueprint $table) {
+            $table->id();
+            $table->unsignedBigInteger('license_id');
+            $table->unsignedBigInteger('user_id');
+            $table->timestamps();
+
+            $table->unique(['license_id', 'user_id']);
+            $table->foreign('license_id')->references('id')->on('licenses')->cascadeOnDelete();
+            $table->foreign('user_id')->references('id')->on('users')->cascadeOnDelete();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('license_assignments');
+    }
+};
diff --git a/database/migrations/2026_05_22_005036_create_parent_child_table.php b/database/migrations/2026_05_22_005036_create_parent_child_table.php
new file mode 100644
index 0000000..e3ca3fc
--- /dev/null
+++ b/database/migrations/2026_05_22_005036_create_parent_child_table.php
@@ -0,0 +1,35 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('parent_child', function (Blueprint $table) {
+            $table->id();
+            $table->uuid('uuid')->unique();
+            // NO tenant_id — cross-tenant parent-child allowed (spec Option B)
+            $table->unsignedBigInteger('parent_id');
+            $table->unsignedBigInteger('child_id');
+            $table->timestamps();
+
+            $table->unique(['parent_id', 'child_id']);
+            $table->foreign('parent_id')->references('id')->on('users')->cascadeOnDelete();
+            $table->foreign('child_id')->references('id')->on('users')->cascadeOnDelete();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('parent_child');
+    }
+};