diff --git a/src/services/billItemService.ts b/src/services/billItemService.ts
new file mode 100644
index 0000000..793e120
--- /dev/null
+++ b/src/services/billItemService.ts
@@ -0,0 +1,20 @@
+import { IndBillitemRecord } from "@/lib/pbtypes";
+import { IndJob } from "@/lib/types";
+import pb from "@/lib/pocketbase";
+import { updateJob } from "./jobService";
+
+export async function addBillItem(
+	job: IndJob,
+	billItem: Omit<IndBillitemRecord, 'id' | 'created' | 'updated'>,
+	type: 'billOfMaterials' | 'consumedMaterials'
+): Promise<IndBillitemRecord> {
+	// Create the bill item
+	const createdItem = await pb.collection<IndBillitemRecord>('ind_billItem').create(billItem);
+
+	const currentBillItems = job[type] || [];
+	await updateJob(job.id, {
+		[type]: [...currentBillItems, createdItem.id]
+	});
+
+	return createdItem;
+}