diff --git a/lib/ash_phoenix/form/form.ex b/lib/ash_phoenix/form/form.ex
index 8d29ece..9b8c0f8 100644
--- a/lib/ash_phoenix/form/form.ex
+++ b/lib/ash_phoenix/form/form.ex
@@ -2044,6 +2044,7 @@ defmodule AshPhoenix.Form do
                %{form | source: query},
                errors
              )
+             |> Map.put(:valid?, false)
              |> carry_over_errors()
              |> update_all_forms(fn form ->
                %{form | just_submitted?: true, submitted_once?: true}
@@ -2075,6 +2076,7 @@ defmodule AshPhoenix.Form do
                errors
              )
              |> carry_over_errors()
+             |> Map.put(:valid?, false)
              |> update_all_forms(fn form ->
                %{form | just_submitted?: true, submitted_once?: true}
              end)
@@ -2105,6 +2107,7 @@ defmodule AshPhoenix.Form do
                %{form | source: changeset},
                errors
              )
+             |> Map.put(:valid?, false)
              |> carry_over_errors()
              |> update_all_forms(fn form ->
                %{form | just_submitted?: true, submitted_once?: true}
@@ -2135,7 +2138,8 @@ defmodule AshPhoenix.Form do
          form
          |> update_all_forms(fn form -> %{form | submitted_once?: true, just_submitted?: true} end)
          |> synthesize_action_errors()
-         |> carry_over_errors()}
+         |> carry_over_errors()
+         |> Map.put(:valid?, false)}
       end
     end
   end
diff --git a/test/form_test.exs b/test/form_test.exs
index f07ee18..4c00d57 100644
--- a/test/form_test.exs
+++ b/test/form_test.exs
@@ -315,6 +315,14 @@ defmodule AshPhoenix.FormTest do
     assert form.valid? == false
   end
 
+  test "validation errors in before action hooks result in valid? false form" do
+    form = Form.for_create(Post, :create_with_before_action, domain: Domain)
+    form = AshPhoenix.Form.validate(form, %{"text" => "text"})
+    {:error, form} = Form.submit(form, params: %{"text" => "text2"})
+
+    refute form.valid?
+  end
+
   test "blank form values unset - helps support dead view forms" do
     form =
       Form.for_create(PostWithDefault, :create,
diff --git a/test/support/resources/post.ex b/test/support/resources/post.ex
index d9466c7..c0b6731 100644
--- a/test/support/resources/post.ex
+++ b/test/support/resources/post.ex
@@ -43,6 +43,10 @@ defmodule AshPhoenix.Test.Post do
       end
     end
 
+    create :create_with_before_action do
+      change before_action(fn changeset, _ -> Ash.Changeset.add_error(changeset, "nope") end)
+    end
+
     create :create do
       primary?(true)
       argument(:author, :map, allow_nil?: true)