1st Quarter Taxes Due Feb. 1: The Tax Office wishes to remind residents that the first quarter 2019 taxes are due on or before February 1st. Upper Saddle River offers a ten-day grace period. If real estate taxes are not paid by February 11th, State law requires that interest is then due from February 1st to the date they are paid. The Borough accepts checks or money orders only. Residents can also pay taxes on-line at https://www.usrtoday.org/tax-collector/ .