delinquent
adjective
FINANCE, TAX US uk/dɪˈlɪŋkwənt/ usnot paid or paid back as should have been done:
delinquent accounts/payments/taxes/loans.
Another 6% of mortgages were delinquent but not yet in foreclosure.
not paying, or paying back, money as agreed:
delinquent borrowers/customers/taxpayers
delinquent in (doing) sth The Dallas Morning News identified multiple contractors who were delinquent in paying their taxes.
42% of callers are at least three months delinquent on mortgage payments.