pay into

pay something into something

 and pay something in
to pay an amount of money into an account. Mary paid forty dollars into my account by mistake. She paid in a lot of money. I have an account here and I want to pay something in.
See also: pay

pay into something

to pay money into an account. I intend to pay into my vacation account until I have enough for a nice vacation. We paid a lot into our savings account this month.
See also: pay