Today I learned how to make Org-mode tags stay at the end of a line in a document, as if they had a float: right CSS property.

The variable responsible for this behavior is org-tags-column, so that if you want to add an extra space between an Org heading and the list of tags, set it to a positive number other than zero:

(setq org-tags-column 20)

But if you want to make it float to the right, use a negative number. I’ve noticed -100 works nice for big screens.

(setq org-tags-column -100)