diff --git a/modules/doom/static/config.el b/modules/doom/static/config.el
index b6075e0..a72a381 100644
--- a/modules/doom/static/config.el
+++ b/modules/doom/static/config.el
@@ -278,6 +278,17 @@
          :desc "New" "n" #'jj-new
          )))
 
+
+;; Org-mode custom property for remaining effort (not-done-items)
+(defun my-org-columns-collect-open-effort (property)
+  "Return PROPERTY only or unfinished entries."
+  (if (member (org-get-todo-state) org-not-done-keywords)
+      (org-entry-get nil property)
+    ""))
+
+(setq org-columns-summary-types
+      '(("remaining:" org-columns--summary-sum-times my-org-columns-collect-open-effort)))
+
 (setq auto-mode-alist (cons '("\\.smt$" . smtlib-mode) auto-mode-alist))
 (autoload 'smtlib-mode "smtlib" "Major mode for SMTLIB" t)