diff --git a/db/migrations/20260701113522_add_box_monetary_value_weight.php b/db/migrations/20260701113522_add_box_monetary_value_weight.php
new file mode 100644
index 00000000..54880723
--- /dev/null
+++ b/db/migrations/20260701113522_add_box_monetary_value_weight.php
@@ -0,0 +1,69 @@
+<?php
+
+use Phinx\Migration\AbstractMigration;
+
+class AddBoxMonetaryValueWeight extends AbstractMigration
+{
+    public function up(): void
+    {
+        $this->table('stock')
+            ->addColumn('weight_display_unit_id', 'integer', [
+                'null' => true,
+                'default' => 1,  // kilogram
+                'signed' => false,
+                'after' => 'size_id',
+            ])
+            ->addColumn('weight', 'decimal', [
+                'null' => true,
+                'default' => null,
+                'signed' => false,
+                // Values for DECIMAL columns are stored using a binary format
+                // that packs nine decimal digits into 4 bytes
+                'precision' => 36,
+                'scale' => 18,
+                'after' => 'weight_display_unit_id',
+            ])
+            ->addColumn('monetary_value', 'decimal', [
+                'null' => true,
+                'default' => null,
+                'signed' => false,
+                'precision' => 36,
+                'scale' => 18,
+                'after' => 'weight',
+            ])
+            ->save()
+        ;
+        $this->table('stock')
+            ->addForeignKey('weight_display_unit_id', 'units', 'id', [
+                'delete' => 'RESTRICT', 'update' => 'CASCADE',
+            ])
+            ->save()
+        ;
+        $this->table('camps')
+            ->addColumn('currency', 'string', [
+                'null' => false,
+                'default' => 'EUR',
+                'limit' => 15,
+                'collation' => 'utf8_general_ci',
+                'encoding' => 'utf8',
+                'after' => 'currencyname',
+            ])
+            ->save()
+        ;
+    }
+
+    public function down(): void
+    {
+        $this->table('stock')
+            ->dropForeignKey('weight_display_unit_id')
+            ->removeColumn('weight_display_unit_id')
+            ->removeColumn('weight')
+            ->removeColumn('monetary_value')
+            ->save()
+        ;
+        $this->table('camps')
+            ->removeColumn('currency')
+            ->save()
+        ;
+    }
+}