(as) sure as death and taxes

(as) sure as death and taxes

Certain to happen; inevitable and unavoidable. A variation of the proverbial phrase, "Nothing is certain but death and taxes." They just aren't right for each other; they're sure as death and taxes to break up eventually. The two brothers will be forever at each other's throats, as sure as death and taxes.
See also: and, death, sure, taxes
Farlex Dictionary of Idioms.
See also:
  • (as) certain as death and taxes
  • death and taxes, certain as
  • taxes
  • death and taxes
  • certain
  • under certain conditions
  • treat (someone or something) like (someone or something else)
  • treat like
  • under certain circumstances
  • be a dead cert