be into (someone) for (something)
1. To be in debt to someone for some amount. Thank you so much for loaning me that money. I must be into you for thousands by now.
2. To be expecting a payment from someone for some amount. The contractor is already into us for thousands, so we better not have another leak!
be ˈinto somebody for something
(American English, informal) owe somebody money or be owed money by somebody: By the time he’d fixed the leak, I was into him for $500.The bank was into her for $100 000.