diff --git a/DXApp.TemplateKitProject/Migrations/20260527133241_AddGuidelineId.Designer.cs b/DXApp.TemplateKitProject/Migrations/20260527133241_AddGuidelineId.Designer.cs
new file mode 100644
index 0000000..a0b3771
--- /dev/null
+++ b/DXApp.TemplateKitProject/Migrations/20260527133241_AddGuidelineId.Designer.cs
@@ -0,0 +1,85 @@
+// <auto-generated />
+using System;
+using DXApp.TemplateKitProject.Data;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace DXApp.TemplateKitProject.Migrations
+{
+    [DbContext(typeof(AppDbContext))]
+    [Migration("20260527133241_AddGuidelineId")]
+    partial class AddGuidelineId
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.8")
+                .HasAnnotation("Relational:MaxIdentifierLength", 128);
+
+            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
+
+            modelBuilder.Entity("DXApp.TemplateKitProject.Models.ZugferdInvoice", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("BuyerName")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("CurrencyCode")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("GuidelineId")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("Iban")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<DateTime>("ImportedAt")
+                        .HasColumnType("datetime2");
+
+                    b.Property<DateTime>("InvoiceDate")
+                        .HasColumnType("datetime2");
+
+                    b.Property<string>("InvoiceNumber")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("RawXml")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("ResultFilePath")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("SellerName")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("SellerTaxId")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("SourceType")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<decimal>("TaxAmount")
+                        .HasColumnType("decimal(18,2)");
+
+                    b.Property<decimal>("TotalAmount")
+                        .HasColumnType("decimal(18,2)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("ZugferdInvoices");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/DXApp.TemplateKitProject/Migrations/20260527133241_AddGuidelineId.cs b/DXApp.TemplateKitProject/Migrations/20260527133241_AddGuidelineId.cs
new file mode 100644
index 0000000..7ea21fa
--- /dev/null
+++ b/DXApp.TemplateKitProject/Migrations/20260527133241_AddGuidelineId.cs
@@ -0,0 +1,28 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace DXApp.TemplateKitProject.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddGuidelineId : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "GuidelineId",
+                table: "ZugferdInvoices",
+                type: "nvarchar(max)",
+                nullable: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "GuidelineId",
+                table: "ZugferdInvoices");
+        }
+    }
+}
diff --git a/DXApp.TemplateKitProject/Migrations/AppDbContextModelSnapshot.cs b/DXApp.TemplateKitProject/Migrations/AppDbContextModelSnapshot.cs
index e5f481e..cf75b6c 100644
--- a/DXApp.TemplateKitProject/Migrations/AppDbContextModelSnapshot.cs
+++ b/DXApp.TemplateKitProject/Migrations/AppDbContextModelSnapshot.cs
@@ -36,6 +36,9 @@ namespace DXApp.TemplateKitProject.Migrations
                     b.Property<string>("CurrencyCode")
                         .HasColumnType("nvarchar(max)");
 
+                    b.Property<string>("GuidelineId")
+                        .HasColumnType("nvarchar(max)");
+
                     b.Property<string>("Iban")
                         .HasColumnType("nvarchar(max)");
 
diff --git a/DXApp.TemplateKitProject/Models/ZugferdInvoice.cs b/DXApp.TemplateKitProject/Models/ZugferdInvoice.cs
index 0da23fb..969fac2 100644
--- a/DXApp.TemplateKitProject/Models/ZugferdInvoice.cs
+++ b/DXApp.TemplateKitProject/Models/ZugferdInvoice.cs
@@ -12,9 +12,10 @@
         public decimal TaxAmount { get; set; }
         public string CurrencyCode { get; set; } = string.Empty;
         public string Iban { get; set; } = string.Empty;
-        public string RawXml { get; set; } = string.Empty;           // Original-XML zur Sicherheit
+        public string RawXml { get; set; } = string.Empty;          // Original-XML zur Sicherheit
         public DateTime ImportedAt { get; set; }
-        public string SourceType { get; set; } = string.Empty;       // "Upload" oder "Email"
+        public string SourceType { get; set; } = string.Empty;      // "Upload" oder "Email"
         public string ResultFilePath { get; set; } = string.Empty;  // Pfad der Result-PDF
+        public string GuidelineId { get; set; } = string.Empty;     // ZUGFeRD Guideline-ID aus XMP
     }
 }
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