Reply The vote to keep the mill rate flat was unanimous. (Harry Zernike/Patch) GREENWICH, CT— The Greenwich Board of Estimate and Taxation set the mill rate for the next fiscal year on Monday night, and much to the delight of town residents, it will remain flat. The BET unanimously approved a Democratic motion to use savings from state healthcare premiums to keep the mill rate flat at 11.590 for fiscal year 2021-2022. The mill rate is used to calculate property and vehicle tax. Originally going into last week's Representative Town Meeting budget deliberations, the mill rate was expected to increase by .29. But the state of Connecticut revised its healthcare premiums which resulted in the Town of Greenwich saving $2 million.