Commonly confused
Sign on vs Sign up
“Sign on” and “Sign up” look alike but pull in different directions. Here is what each one means, with examples — and the difference that learners most often miss.
The key difference
Sign on means authenticate into a service. Sign up means officially register for a course, service or membership.
sign on
- 1
Authenticate into a service
“Sign on with your work credentials.”
sign up
- 1
Officially register for a course, service or membership
“She signed up for yoga classes.”
Stop mixing them up
Sink In turns confusable pairs like this into quick contrast drills, so the right particle becomes automatic.