diff --git a/hr_timesheet_sheet/static/src/components/timesheet_matrix/timesheet_matrix.esm.js b/hr_timesheet_sheet/static/src/components/timesheet_matrix/timesheet_matrix.esm.js
index c4f14faaf9..2d6b5bf6e5 100644
--- a/hr_timesheet_sheet/static/src/components/timesheet_matrix/timesheet_matrix.esm.js
+++ b/hr_timesheet_sheet/static/src/components/timesheet_matrix/timesheet_matrix.esm.js
@@ -22,6 +22,18 @@ patch(X2Many2DMatrixRenderer.prototype, {
         return columns;
     },
 
+    _getRows() {
+        const rows = super._getRows(...arguments);
+        if (this._knownRowValues) {
+            for (const row of rows) {
+                row.isNewlyAdded = !this._knownRowValues.has(row.value);
+                this._knownRowValues.add(row.value);
+            }
+        }
+        this._knownRowValues = new Set(rows.map((r) => r.value));
+        return rows;
+    },
+
     _getCellClass(column, rowValue) {
         const x = this.columns.findIndex((c) => c.value === column.value);
         const y = this.rows.findIndex((r) => r.value === rowValue);
@@ -33,6 +45,10 @@ patch(X2Many2DMatrixRenderer.prototype, {
         };
     },
 
+    _getRowClass(row) {
+        return {o_matrix_new_row: row.isNewlyAdded};
+    },
+
     _getColumnTotalClass(column) {
         return {o_matrix_today: column.isToday};
     },
diff --git a/hr_timesheet_sheet/static/src/components/timesheet_matrix/timesheet_matrix.scss b/hr_timesheet_sheet/static/src/components/timesheet_matrix/timesheet_matrix.scss
index 359e3b130e..d3dae58bbb 100644
--- a/hr_timesheet_sheet/static/src/components/timesheet_matrix/timesheet_matrix.scss
+++ b/hr_timesheet_sheet/static/src/components/timesheet_matrix/timesheet_matrix.scss
@@ -8,6 +8,10 @@
         background-color: rgba($info, 0.2);
     }
 
+    .o_matrix_new_row {
+        background-color: rgba($info, 0.2);
+    }
+
     .o_matrix_value_nonzero {
         font-weight: bold;
     }
diff --git a/hr_timesheet_sheet/static/src/components/timesheet_matrix/timesheet_matrix_renderer.xml b/hr_timesheet_sheet/static/src/components/timesheet_matrix/timesheet_matrix_renderer.xml
index 5a3dcad996..9f80b9415d 100644
--- a/hr_timesheet_sheet/static/src/components/timesheet_matrix/timesheet_matrix_renderer.xml
+++ b/hr_timesheet_sheet/static/src/components/timesheet_matrix/timesheet_matrix_renderer.xml
@@ -9,6 +9,10 @@
             <attribute name="t-att-class">{o_matrix_today: column.isToday}</attribute>
         </xpath>
 
+        <xpath expr="//tbody/tr" position="attributes">
+            <attribute name="t-att-class">_getRowClass(row)</attribute>
+        </xpath>
+
         <xpath expr="//tbody//td[@t-foreach]" position="attributes">
             <attribute name="t-att-class">_getCellClass(column, row.value)</attribute>
         </xpath>