make no difference
1. Of two or more options or actions, to not differ in effect. It makes no difference if you add the salt before or after you heat the soup.
2. To have no impact, either positive or negative. A lot of people don't vote because they think it makes no difference. Honestly, it will make no difference if he complains—they're not going to change their policy.
make no difference (to someone)
[for a choice] not to matter to someone. (Any is used with negative nouns or verbs.) Pick whom you like. It makes no difference to me. It doesn't make any difference to me. Nothing much makes any difference to them anymore.