tie sb in
phrasal verb with tie verb uk/taɪ/ ustying | tied | tied
FINANCE
to make people agree to particular conditions when they borrow, invest, or buy a product, especially relating to the minimum period of time the agreement can last:
tie sb in Watch out for bonus accounts that tie you in after the bonus period.
tie sb in with sth Fixed-rate mortgages usually tie borrowers in with early repayment charges.
tie sb in for sth You need to know your mortgage rate and how long you are tied in for.