diff --git a/src/power_grid_model/validation/validation.py b/src/power_grid_model/validation/validation.py
index aab61338ac..0536af0d90 100644
--- a/src/power_grid_model/validation/validation.py
+++ b/src/power_grid_model/validation/validation.py
@@ -328,6 +328,13 @@ def validate_required_values(
         "tap_max",
         "tap_size",
     ]
+
+    # Regulators
+    required["regulator"] = required["base"] + ["regulated_object", "status"]
+    required["transformer_tap_regulator"] = required["regulator"]
+    if calculation_type is None or calculation_type == CalculationType.power_flow:
+        required["transformer_tap_regulator"] += ["control_side", "u_set", "u_band"]
+
     # Appliances
     required["appliance"] = required["base"] + ["node", "status"]
     required["source"] = required["appliance"].copy()
diff --git a/tests/unit/validation/test_input_validation.py b/tests/unit/validation/test_input_validation.py
index f9adb2878a..c5b3e7bf23 100644
--- a/tests/unit/validation/test_input_validation.py
+++ b/tests/unit/validation/test_input_validation.py
@@ -156,6 +156,16 @@ def input_data() -> Dict[str, np.ndarray]:
     three_winding_transformer["pk_13_max"] = [-40, nan_type("three_winding_transformer", "pk_12_max"), 40, 50]
     three_winding_transformer["pk_23_max"] = [-120, nan_type("three_winding_transformer", "pk_12_max"), 40, 30]
 
+    transformer_tap_regulator = initialize_array("input", "transformer_tap_regulator", 4)
+    transformer_tap_regulator["id"] = [51, 52, 53, 1]
+    transformer_tap_regulator["status"] = [0, -1, 2, 5]
+    transformer_tap_regulator["regulated_object"] = [14, 15, 28, 2]
+    transformer_tap_regulator["control_side"] = [1, 2, 0, 60]
+    transformer_tap_regulator["u_set"] = [100, -100, 100, 100]
+    transformer_tap_regulator["u_band"] = [100, -4, 100, 0]
+    transformer_tap_regulator["line_drop_compensation_r"] = [0.0, -1.0, 1.0, 2.0]
+    transformer_tap_regulator["line_drop_compensation_x"] = [0.0, 4.0, 2.0, -4.0]
+
     source = initialize_array("input", "source", 3)
     source["id"] = [16, 17, 1]
     source["node"] = [10, 1, 2]
@@ -238,6 +248,7 @@ def input_data() -> Dict[str, np.ndarray]:
         "link": link,
         "transformer": transformer,
         "three_winding_transformer": three_winding_transformer,
+        "transformer_tap_regulator": transformer_tap_regulator,
         "source": source,
         "shunt": shunt,
         "sym_load": sym_load,
@@ -273,6 +284,7 @@ def test_validate_input_data_sym_calculation(input_data):
                 ("transformer", "id"),
                 ("three_winding_transformer", "id"),
                 ("fault", "id"),
+                ("transformer_tap_regulator", "id"),
             ],
             [
                 ("asym_gen", 1),
@@ -301,6 +313,7 @@ def test_validate_input_data_sym_calculation(input_data):
                 ("transformer", 1),
                 ("three_winding_transformer", 1),
                 ("fault", 1),
+                ("transformer_tap_regulator", 1),
             ],
         )
         in validation_errors
@@ -550,6 +563,31 @@ def test_validate_three_winding_transformer_ukpkminmax(input_data):
     assert NotGreaterOrEqualError("three_winding_transformer", "pk_23_max", [1], 0) in validation_errors
 
 
+def test_validate_input_data_transformer_tap_regulator(input_data):
+    validation_errors = validate_input_data(input_data, calculation_type=CalculationType.power_flow)
+    assert NotBooleanError("transformer_tap_regulator", "status", [52, 1, 53]) in validation_errors
+    assert (
+        InvalidIdError(
+            "transformer_tap_regulator", "regulated_object", [1], ["transformer", "three_winding_transformer"]
+        )
+        in validation_errors
+    )
+    assert (
+        InvalidEnumValueError("transformer_tap_regulator", "control_side", [1], [BranchSide, Branch3Side])
+        in validation_errors
+    )
+    # TODO (nbharambe) Add control side error after it is included
+    # assert InvalidControlSideError("transformer_tap_regulator", "control_side", [52], BranchSide) in validation_errors
+    assert NotGreaterOrEqualError("transformer_tap_regulator", "u_set", [52], 0.0) in validation_errors
+    assert NotGreaterThanError("transformer_tap_regulator", "u_band", [52, 1], 0.0) in validation_errors
+    assert (
+        NotGreaterOrEqualError("transformer_tap_regulator", "line_drop_compensation_r", [52], 0.0) in validation_errors
+    )
+    assert (
+        NotGreaterOrEqualError("transformer_tap_regulator", "line_drop_compensation_x", [1], 0.0) in validation_errors
+    )
+
+
 def test_fault(input_data):
     validation_errors = validate_input_data(input_data, calculation_type=CalculationType.short_circuit)
     assert InvalidEnumValueError("fault", "fault_type", [50], FaultType) in validation_errors