diff --git a/src/main/python/ddadevops/domain/terraform.py b/src/main/python/ddadevops/domain/terraform.py
index 95b29bb..acd1292 100644
--- a/src/main/python/ddadevops/domain/terraform.py
+++ b/src/main/python/ddadevops/domain/terraform.py
@@ -31,6 +31,7 @@ class Terraform(Validateable):
     def validate(self) -> List[str]:
         result = []
         result += self.__validate_is_not_empty__("module")
+        result += self.__validate_is_not_empty__("stage")
         result += self.__validate_is_not_empty__("tf_build_commons_dir_name")
         return result
 
@@ -43,3 +44,9 @@ class Terraform(Validateable):
     def terraform_build_commons_path(self) -> Path:
         mylist = [self.tf_build_commons_path, self.tf_build_commons_dir_name]
         return Path("/".join(filter_none(mylist)) + "/")
+
+    def project_vars(self):
+        ret = {"stage": self.stage, "module": self.module}
+        if self.tf_additional_vars:
+            ret.update(self.tf_additional_vars)
+        return ret
diff --git a/src/test/python/domain/test_terraform.py b/src/test/python/domain/test_terraform.py
index d46457d..b042bf0 100644
--- a/src/test/python/domain/test_terraform.py
+++ b/src/test/python/domain/test_terraform.py
@@ -31,3 +31,8 @@ def test_should_calculate_terraform_build_commons_path():
     config = devops_config({})
     sut = Terraform(config)
     assert Path("build_commons_path/terraform") == sut.terraform_build_commons_path()
+
+def test_should_calculate_project_vars():
+    config = devops_config({})
+    sut = Terraform(config)
+    assert {'module': 'module', 'stage': 'test'} == sut.project_vars()