diff --git a/completion/todo.completion.bash b/completion/todo.completion.bash
new file mode 100644
index 0000000..00493db
--- /dev/null
+++ b/completion/todo.completion.bash
@@ -0,0 +1,34 @@
+_todo()
+{
+    local cur prev opts
+    COMPREPLY=()
+    cur="${COMP_WORDS[COMP_CWORD]}"
+    prev="${COMP_WORDS[COMP_CWORD-1]}"
+
+    COMMANDS="add a addto addm append app archive command del  \
+              rm depri dp do help list ls listall lsa listcon  \
+              lsc listfile lf listpri lsp listproj lsproj move \
+              mv prepend prep pri p replace report"
+
+    # Add custom commands from add-ons, if installed.
+    COMMANDS="$COMMANDS $('ls' ${TODO_ACTIONS_DIR:-$HOME/.todo.actions.d}/ 2>/dev/null)"
+
+    OPTS="-@ -@@ -+ -++ -d -f -h -p -P -PP -a -n -t -v -vv -V -x"
+
+    if [ $COMP_CWORD -eq 1 ]; then
+	completions="$COMMANDS $OPTS"
+    else
+	case "${prev}" in
+	    -*) completions="$COMMANDS $OPTS";;
+	    *)  return 0;;
+	esac
+    fi
+
+    COMPREPLY=( $( compgen -W "$completions" -- $cur ))
+    return 0
+}
+
+complete -F _todo todo.sh
+# If you define an alias (e.g. "t") to todo.sh, you need to explicitly enable
+# completion for it, too:
+complete -F _todo t