DPD this is what gleim says word for word: pg 73 if your using gleim
For IFAC
When the total fees from an audit client represent a large proportion of the total fees of the firm expressing the audit opinion ( or a partner or office), the dependence on that client and concern about losing the client creates a self-interest or intimidation threat.
a self-interest threat may be created if overdue fees remain unpaid for a long time, especially if a significant part is not paid before the issue of the audit report for the following year. Generally, the firm is expected to require payment of such fees before such audit report is issued.
Conclusion, My opinion depends on materiality
AUD 69, 92 7/15 Gleim and Ninja test bank
FAR sometime in 10/15 Gleim
BEC not taken
REG not taken