diff --git a/migrations/add-unit-cost.sql b/migrations/add-unit-cost.sql
new file mode 100644
index 0000000..7c9da8b
--- /dev/null
+++ b/migrations/add-unit-cost.sql
@@ -0,0 +1 @@
+ALTER TABLE invoice_items ADD COLUMN unit_cost character varying(50);
diff --git a/public/js/utils/item-editor.js b/public/js/utils/item-editor.js
index 78334dd..ded144e 100644
--- a/public/js/utils/item-editor.js
+++ b/public/js/utils/item-editor.js
@@ -101,7 +101,11 @@ export function addItem(containerId, { item = null, type = 'invoice', laborRate
                     <label class="block text-xs font-medium text-gray-700 mb-1">Rate</label>
                     <input type="text" data-item="${itemId}" data-field="rate" value="${item ? item.rate : ''}" class="${cssClass} w-full px-2 py-2 border border-gray-300 rounded-md text-sm">
                 </div>
-                <div class="col-span-3">
+                <div class="col-span-1 cost-field" style="${(item && item.qbo_item_id && item.qbo_item_id != '9') ? 'display:none' : ''}">
+                    <label class="block text-xs font-medium text-gray-700 mb-1">Cost</label>
+                    <input type="text" data-item="${itemId}" data-field="unit_cost" value="${item && item.qbo_item_id == '9' ? (item.unit_cost || '') : ''}" class="${cssClass} w-full px-2 py-2 border border-gray-300 rounded-md text-sm">
+                </div>
+                <div class="col-span-2">
                     <label class="block text-xs font-medium text-gray-700 mb-1">Amount</label>
                     <input type="text" data-item="${itemId}" data-field="amount" value="${item ? item.amount : ''}" class="${amountClass} w-full px-2 py-2 border border-gray-300 rounded-md text-sm">
                 </div>
@@ -209,7 +213,6 @@ export function handleTypeChange(selectEl, prefix, itemId) {
         const rateInput = itemDiv.querySelector('[data-field="rate"]');
         if (rateInput && (!rateInput.value || rateInput.value === '0')) {
             rateInput.value = laborRate;
-            // Recalculate amount
             const qtyInput = itemDiv.querySelector('[data-field="quantity"]');
             const amountInput = itemDiv.querySelector('[data-field="amount"]');
             if (qtyInput.value) {
@@ -219,6 +222,11 @@ export function handleTypeChange(selectEl, prefix, itemId) {
         }
     }
 
+    const costField = itemDiv.querySelector('.cost-field');
+    if (costField) {
+        costField.style.display = (selectEl.value === '9') ? '' : 'none';
+    }
+
     updateItemPreview(itemDiv);
     onUpdate();
 }
@@ -236,11 +244,15 @@ export function getItems(containerId) {
             ? descEditor.quillInstance.root.innerHTML
             : '';
 
+        const qboItemId = div.querySelector('[data-field="qbo_item_id"]').value;
+        const unitCostInput = div.querySelector('[data-field="unit_cost"]');
+
         items.push({
             quantity: div.querySelector('[data-field="quantity"]').value,
-            qbo_item_id: div.querySelector('[data-field="qbo_item_id"]').value,
+            qbo_item_id: qboItemId,
             description: descriptionHTML,
             rate: div.querySelector('[data-field="rate"]').value,
+            unit_cost: (qboItemId === '9' && unitCostInput) ? unitCostInput.value : '',
             amount: div.querySelector('[data-field="amount"]').value
         });
     });
diff --git a/schema.sql b/schema.sql
index 73156ca..238bb95 100644
--- a/schema.sql
+++ b/schema.sql
@@ -88,10 +88,10 @@ CREATE TABLE public.invoice_items (
     amount character varying(50) NOT NULL,
     item_order integer NOT NULL,
     created_at timestamp without time zone DEFAULT CURRENT_TIMESTAMP,
-    qbo_item_id character varying(10) DEFAULT '9'::character varying
+    qbo_item_id character varying(10) DEFAULT '9'::character varying,
+    unit_cost character varying(50)
 );
 
-
 ALTER TABLE public.invoice_items OWNER TO quoteuser;
 
 --
diff --git a/src/routes/invoices.js b/src/routes/invoices.js
index 191c8bc..855f094 100644
--- a/src/routes/invoices.js
+++ b/src/routes/invoices.js
@@ -192,8 +192,8 @@ router.post('/', async (req, res) => {
 
         for (let i = 0; i < items.length; i++) {
             await client.query(
-                'INSERT INTO invoice_items (invoice_id, quantity, description, rate, amount, item_order, qbo_item_id) VALUES ($1, $2, $3, $4, $5, $6, $7)',
-                [invoiceId, items[i].quantity, items[i].description, items[i].rate, items[i].amount, i, items[i].qbo_item_id || '9']
+                'INSERT INTO invoice_items (invoice_id, quantity, description, rate, amount, item_order, qbo_item_id, unit_cost) VALUES ($1, $2, $3, $4, $5, $6, $7, $8)',
+                [invoiceId, items[i].quantity, items[i].description, items[i].rate, items[i].amount, i, items[i].qbo_item_id || '9', items[i].unit_cost || null]
             );
         }
 
@@ -333,8 +333,8 @@ router.put('/:id', async (req, res) => {
         await client.query('DELETE FROM invoice_items WHERE invoice_id = $1', [id]);
         for (let i = 0; i < items.length; i++) {
             await client.query(
-                'INSERT INTO invoice_items (invoice_id, quantity, description, rate, amount, item_order, qbo_item_id) VALUES ($1, $2, $3, $4, $5, $6, $7)',
-                [id, items[i].quantity, items[i].description, items[i].rate, items[i].amount, i, items[i].qbo_item_id || '9']
+                'INSERT INTO invoice_items (invoice_id, quantity, description, rate, amount, item_order, qbo_item_id, unit_cost) VALUES ($1, $2, $3, $4, $5, $6, $7, $8)',
+                [id, items[i].quantity, items[i].description, items[i].rate, items[i].amount, i, items[i].qbo_item_id || '9', items[i].unit_cost || null]
             );
         }