Revert means to go back to how something was before, or, in business emails, to reply. Refer means to point someone towards something else, or to be about a particular subject. If you are pointing at a page number or sending someone to a specialist, that is refer; if you are going back to an earlier plan, that is revert.
The core difference
Revert is about returning to a prior state (or replying); refer is about directing attention or relating to something.
- revert — go back to a previous state or reply: Let's revert to the original plan if this one doesn't work.
- refer — direct attention elsewhere or relate to something: Please refer to page 12 for more details.
How to tell them apart
A useful memory hook: revert has "re-" plus the idea of turning back, so picture a dial that reverts, or turns back, to its original setting. Refer, by contrast, sends you forward, off to another page, another person, another source.
The mix-up shows up most in office emails, where "I will revert to you shortly" is used to mean "I will reply to you shortly." This use is common in business correspondence, though some readers expect revert to mean only "go back," so refer or reply can be the clearer choice when precision matters.