• When are taxes due & when will I receive my Tax Bill?
  • Taxes are due quarterly.
    • February 1st, May 1st, August 1st & November 1st.
  • Tax Bills are mailed annually in July.
    • The annual bill includes four payment stubs.
      • Two for the 3rd and 4th quarters of the current year
      • Two for the 1st and 2nd quarters of the subsequent year.
  • Per NJ State Statutes postmarks cannot be accepted as date of receipt of tax payment.
• How are my taxes calculated?
  • The tax calculation is developed by multiplying the assessed value of the property by the current tax year rate.
    • 2023 $2.454 per 100
• Who determines the Tax Rate & how?
  • The tax rate is determined by the Morris County Board of Taxation upon the approval of municipal, school and county annual budgets.
• Where can I submit my tax payment?
  • On-line ACH
  • By mail to: Tax Collector Office, First Floor, 6 West Main Street, Mendham, NJ 07945.
  • In person at the Tax Collector's Office at the Bowers  Building or the Phoenix House.
  • Outside drop boxes at the Bowers Building
    • Located on the right side and on the front porch of the Bowers Building.
    • Only check payments can be left in the drop boxes.
• What payment methods are acceptable?
  • On-line ACH
  • Check
    • Make payable to: Borough of Mendham.
  • Cash
    • Please drop-off inside at the Bowers Building Tax Office or Phoenix House.
  • For non-ACH payments, please submit the stub for the current quarter with your payment to avoid errors.
• How are receipts for tax payment provided?​​​​​​​
  • If you wish a hand-stamped receipt, mail the entire tax bill with a self addressed stamped envelop and payment to:
    • Tax Collector Office, First Floor, 6 West Main Street, Mendham, NJ 07945.
    • The top half of the bill will be stamped, receipted and return mailed to you.
  • Generally your cancelled check or On-Line ACH confirmation is your receipt and a hand-stamped reciept is not necessary.
• ​​​​​​​How can I get a copy of my tax bill?
  • To receive a duplicate tax bill send a note or email requesting a duplicate tax bill and authorizing the Tax Office to mail future bills and notices to you.
  • Remember to include your mailing address.
  • Emails can be sent to borotax@mendhamnj.org
• What is the Grace Period to pay taxes and not incur an interest charge?
  • There is a 10-day interest free Grace Period.
  • The Grace Period deadline is the 10th of the month in which the tax bill payment is due.
• When is a Tax Bill Payment Delinquent?
  • The day after the 10-day Grace Period deadline.
  • or the 11th of the month in which the tax bill payment is due. 
• When is interest charged?
  • When the Tax Bill Payment becomes deliquent.
    • Interest is calculated from the tax payment due date until the date of receipt of the tax bill payment.
    • The date of receipt of the tax bill payment is not the postmark date.  It is the date received by the Tax Collector's Office.
• What is the interest rate charged?
  • The rate of interest on an upaid tax bill is:
    • 8% per annnum on the first $1,500 deliquent and
    • 18% per annum on any amount delinquent in excess of $1,500.
• When is a penalty rate charged in addition to the interest rate charged?
  • A penalty of 6% in addition to interest is charged for ​​​​delinquencies in excess of Ten Thousand Dollars ($10,000.00) that are not paid prior to the end of the fiscal year.
• When are delinquencies placed on the tax sale list & published in the paper?
  • All properties with a tax or sewer delinquency from the prior year are required by state statute to be placed on the tax sale list.
  • All delinquencies from 2022 will be placed on the tax sale list that is compiled in Fall of 2023.
• How do tax delinquencies affect the tax rate for residences?
  • The total prior year delinquency is a factor in calculating the current year's tax rate therefore it's significant for taxes to be paid up-to-date prior to the end of the year.