While CPLR 306-b requires that service be effected within 120 days of the commencement of the action, it also provides that "[i]f service is not made upon a defendant within the time provided in this section, the court, upon motion, shall dismiss the action without prejudice as to that defendant, or upon good cause shown or in the interest of justice, extend the time for service." A motion to extend the time for service may be granted on good cause shown or in the interest of justice, which are separate and independent standards. To establish good cause, a plaintiff must demonstrate reasonable diligence in attempting service. If good cause for an extension is not established, a court must consider the broader interest of justice standard. In applying that standard, the court must analyze the factual setting and the parties' competing interests. It may also consider diligence, or the lack thereof, along with any other relevant factor in making its determination, including expiration of the Statute of Limitations, the meritorious nature of the cause of action, the length of delay in service, the promptness of a plaintiff's request for the extension of time, and prejudice to the defendant.
Fink v. Dollar Mart, NY Slip Op (2d Dep't September 2, 2020)
Here is the decision.