Important Reminder Regarding Connecticut Property Tax Exemptions

Quadrennial Reports are due on November 1, 2021, which is next Monday. These filings – also called the Form M-3 Exemption Applications – are necessary to obtain or maintain real and personal property tax exemption in any town(s) in which your nonprofit owns property. These Forms are filed every four years, and this is the year.

If your organization owns property in more than one town, the organization should file Form M-3 with each town’s assessor. (Consider where you store any property.) If you have more than one entity that owns real or personal property, each entity should file Form M-3.

You should have received your Form M-3 in the mail from your local town assessor(s), but if you did not, check your town assessor’s website, call the assessor, or use the generic Form M-3 from the Connecticut Association of Assessing Officers (CAAO), linked here; instructions to the CAAO form linked here. Note – some towns use their own version of the M-3 rather than the generic CAAO version. Often, the town assessor’s Form M-3 requests less information than the CAAO’s Form M-3, which tries to cover all possible bases. So check with your assessor(s) to confirm what version of the form you should use.   

Please note, November 1st is a hard and fast deadline, so make sure to get something in to the town by November 1st! Failure to file the Form M-3 on time could result in the loss of your organization’s property exemption.

We are very grateful to Adam Cohen, CPA, for his contributions to this Legal Alert.


If you have questions, we suggest you contact the relevant town assessor. Or you can contact Priya Morganstern, Esq., Connecticut Program Director, at (860) 541-4950 or or Robin Schwartz, Esq., Senior Staff Attorney, at (860) 541-4952 or

This document is provided as a general informational service to volunteers, clients, and friends of Pro Bono Partnership. It should not be construed as, and does not constitute, legal advice on any specific matter, nor does distribution of this document create an attorney-client relationship.​​​​​