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Employee Benefit Plan
6 Months Ended
Jun. 30, 2021
Retirement Benefits [Abstract]  
Employee Benefit Plan Employee Benefit PlanWe have a defined contribution 401(k) retirement plan covering Zillow Group employees who have met certain eligibility requirements (the “Zillow Group 401(k) Plan”). Eligible employees may contribute pretax compensation up to a maximum amount allowable under the Internal Revenue Service limitations. Employee contributions and earnings thereon vest immediately. We currently match up to 4% of employee contributions under the Zillow Group 401(k) Plan. The total expense related to the Zillow Group 401(k) Plan was $8.0 million and $6.4 million, respectively, for the three months ended June 30, 2021 and 2020, and $15.7 million and $12.8 million, respectively, for the six months ended June 30, 2021 and 2020.