diff --git a/packages/models/src/contract/ContractItem/ContractItem.ts b/packages/models/src/contract/ContractItem/ContractItem.ts
index d4fc7729..624e80ab 100644
--- a/packages/models/src/contract/ContractItem/ContractItem.ts
+++ b/packages/models/src/contract/ContractItem/ContractItem.ts
@@ -4,6 +4,7 @@ import { DataModel, ReferenceModel } from "../../base/index.js";
 import { provideReact } from "../../react/index.js";
 import { config } from "../../config/config.js";
 import assertObjectFound from "../../base/assertObjectFound.js";
+import { ContractItemArticleDetailed } from "../ContractItemArticle/index.js";
 
 export class ContractItem extends ReferenceModel {
   public static ofId(contractId: string, id: string): ContractItem {
@@ -44,7 +45,7 @@ export class ContractItem extends ReferenceModel {
   }
 }
 
-export class ContractItemDetailed extends classes(
+export class ContractItemCommon extends classes(
   DataModel<ContractItemData>,
   ContractItem,
 ) {
@@ -52,3 +53,16 @@ export class ContractItemDetailed extends classes(
     super([data], [contractId, data.itemId]);
   }
 }
+
+export class ContractItemDetailed extends ContractItemCommon {
+  public readonly articles: ContractItemArticleDetailed[];
+
+  public constructor(contractId: string, data: ContractItemData) {
+    super(contractId, data);
+
+    this.articles = data.articles.map(
+      (articleData) =>
+        new ContractItemArticleDetailed(contractId, this.id, articleData),
+    );
+  }
+}
diff --git a/packages/models/src/contract/ContractItemArticle/ContractItemArticle.ts b/packages/models/src/contract/ContractItemArticle/ContractItemArticle.ts
new file mode 100644
index 00000000..2b2d181b
--- /dev/null
+++ b/packages/models/src/contract/ContractItemArticle/ContractItemArticle.ts
@@ -0,0 +1,78 @@
+import { DataModel, ListDataModel, ReferenceModel } from "../../base/index.js";
+import { ContractItemArticleData } from "./types.js";
+import { classes } from "polytype";
+
+export class ContractItemArticle extends ReferenceModel {
+  public static ofId(
+    id: string,
+    contractId: string,
+    contractItemId: string,
+  ): ContractItemArticle {
+    return new ContractItemArticle(id, contractId, contractItemId);
+  }
+
+  public readonly contractId: string;
+  public readonly contractItemId: string;
+
+  public constructor(id: string, contractId: string, contractItemId: string) {
+    super(id);
+    this.contractId = contractId;
+    this.contractItemId = contractItemId;
+  }
+}
+
+class ContractItemArticleCommon extends classes(
+  DataModel<ContractItemArticleData>,
+  ContractItemArticle,
+) {
+  public constructor(
+    contractId: string,
+    contractItemId: string,
+    data: ContractItemArticleData,
+  ) {
+    super([data], [data.id, contractId, contractItemId]);
+  }
+}
+
+export class ContractItemArticleDetailed extends ContractItemArticleCommon {
+  public constructor(
+    contractId: string,
+    contractItemId: string,
+    data: ContractItemArticleData,
+  ) {
+    super(contractId, contractItemId, data);
+  }
+
+  public get totalPrice(): number {
+    return this.data.amount * this.data.unitPrice.value;
+  }
+
+  public get displayName(): string {
+    return `${this.data.name} (${this.data.description})`;
+  }
+}
+
+export class ContractItemArticleListItem extends ContractItemArticleCommon {
+  public constructor(
+    contractId: string,
+    contractItemId: string,
+    data: ContractItemArticleData,
+  ) {
+    super(contractId, contractItemId, data);
+  }
+}
+
+export class ContractItemArticleList extends ListDataModel<ContractItemArticleListItem> {
+  public readonly contractId: string;
+  public readonly contractItemId: string;
+
+  public constructor(
+    contractId: string,
+    contractItemId: string,
+    items: ContractItemArticleListItem[],
+  ) {
+    super(items, items.length);
+    this.contractId = contractId;
+    this.contractItemId = contractItemId;
+  }
+}
diff --git a/packages/models/src/contract/ContractItemArticle/index.ts b/packages/models/src/contract/ContractItemArticle/index.ts
new file mode 100644
index 00000000..2c002f10
--- /dev/null
+++ b/packages/models/src/contract/ContractItemArticle/index.ts
@@ -0,0 +1,2 @@
+export * from "./ContractItemArticle.js";
+export * from "./types.js";
diff --git a/packages/models/src/contract/ContractItemArticle/types.ts b/packages/models/src/contract/ContractItemArticle/types.ts
new file mode 100644
index 00000000..1918143c
--- /dev/null
+++ b/packages/models/src/contract/ContractItemArticle/types.ts
@@ -0,0 +1,11 @@
+export type ContractItemArticleData = {
+  amount: number;
+  articleTemplateId: string;
+  description?: string;
+  id: string;
+  name: string;
+  unitPrice: {
+    currency: string;
+    value: number;
+  };
+};
diff --git a/packages/models/src/contract/index.ts b/packages/models/src/contract/index.ts
index e0c81bef..88a83c26 100644
--- a/packages/models/src/contract/index.ts
+++ b/packages/models/src/contract/index.ts
@@ -1,2 +1,3 @@
 export * from "./Contract/index.js";
 export * from "./ContractItem/index.js";
+export * from "./ContractItemArticle/index.js";