diff --git a/src/formatter.lua b/src/formatter.lua
index 00cdf01..dfd68ed 100644
--- a/src/formatter.lua
+++ b/src/formatter.lua
@@ -285,7 +285,11 @@ function M.format_document(content, options)
           if_base_level = nil
         end
         in_fb_call = false  -- Reset FB call state
-        indent_level = math.max(0, indent_level - 1)
+        -- Don't decrease indent for END_IF - it stays at same level as content (per TIA Portal)
+        -- Only decrease for other enders like END_REGION, END_CASE, END_FOR, etc.
+        if kw ~= "END_IF" then
+          indent_level = math.max(0, indent_level - 1)
+        end
         if needs_semicolon(trimmed) then
           formatted_line = formatted_line .. ";"
         end