Tax Collector

Tax Collector: Heather Kish
540 St. Hwy 11C., Winthrop, NY
Phone: 315-389-5171 x1
June 16, 2025 New Phone number
315-262-8061 ext 101
Fax: 315-222-7329

Hours:
Labor Day – Memorial Day - Monday – Thursday 8:00 AM – 4:00 PM Closed daily from noon to 1 for lunch.
Memorial Day – Labor Day – Monday – Thursday 9:00 AM – 4:00 PM Closed daily from noon to 1 for lunch.

After hours - by appointment only!  Contact the collector during business hours.

Duties: Collect all Town and County Taxes from January 1-June 2, 2025 including bank deposits and bonding with St. Lawrence County. All taxes after June 2, 2025 go to St. Lawrence County Treasurer’s Office for collection.  You can pay at the Treasurer's office as soon as June 3rd.

1st Installment for 2026 is due Monday, February 2, 2026.   I cannot accept any installment payments after that date.  Thank you!

Tax collection period is 1/1/26-6/1/26

​When making tax payments - random amounts are not accepted.  Please make your check/money order for the amount listed on your tax bill.  i.e. - amount of tax bill $1235.45 - Do NOT send $1250.00 - your payment will be returned.

Paid without pentalties -February 2, 2026
1st Installment -February 2, 2026 
2nd Installment - March 31, 2026
3rd Installment - June 1, 2026
After June1, 2026 - I no longer can accept payments.  You may contact the Treasurer's office June 2, 2026 for your amount due.

******School taxes are not paid in this office.  You must look at your bill to see where to pay  them.  

BY NYS TAX LAW:
Installment payment option—first payment must be made by February 2, 2026.
All installment payments must be received in my office or postmarked by the day they are DUE without penalty.
Please make sure your checks are written correctly with the amount written out as it should be.

​If you are unsure of the amount you owe - please call the tax collector during business hours. 

Tax information can be found online at www.taxlookup.net.

The Tax Collector only collects tax payments - she does not do exemptions or anything to do with the property.  Contact the Assessor, Pat Lynch for other matters besides tax payments.

2026 Tax Bills

2026_stockholm_tax_roll.pdf

2026 Stockholm Town Bank Bills

What are chargebacks?

​The big USPS postmark rule change in late 2025, effective Dec 24, 2025, means mail is postmarked when first sorted at regional hubs, not when dropped off, impacting NYS deadlines for taxes, ballots, and bills; you must now mail critical items days early or get a hand-stamped postmark in-person at a post office counter for proof, as blue box drops might show a later date due to processing delays. 
What Changed?

• Old Rule: Postmark generally reflected the date you handed it to the USPS (mailbox or counter).
• New Rule (Dec 24, 2025): The postmark date is when mail first hits an automated sorting machine at a processing center, which can be hours or days later. 

Who's Affected in NYS?

• Tax Filers: Dropping off returns on April 15th could result in an April 16th or later postmark, risking IRS penalties.
• Voters: Mail-in ballots dropped on Election Day might be postmarked later, invalidating the vote.
• Renters & Bill Payers: Rent or bill payments due on the last day of the month could be marked late, incurring fees. 

How to Protect Yourself (Solutions):

• Mail Early: Send time-sensitive items several days before the actual deadline.
• Get a Manual Postmark: Go inside the Post Office on the deadline day and ask for a free, hand-applied local postmark.
• Use Certified/Registered Mail: These services provide receipts and proof of mailing.
• Certificate of Mailing: Get one at the counter for proof of submission (doesn't offer tracking). 

Why the Change?

• Part of the USPS "Delivering For America" plan to modernize and consolidate operations, reducing transportation trips to processing centers