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Reviewed by: William McLee
Reviewed date:
January 16, 2026

What New York Form ST-809 (2023) Is For

New York Form ST-809 (2023) is the official monthly sales and use tax return for businesses in New York State that meet the threshold for part-quarterly filing. It is used to report taxable sales, calculate state and local tax due, and remit payments to the New York State Department of Taxation and Finance. This state sales tax return applies only to monthly filers and is designed to provide the government with accurate, ongoing revenue data between quarterly reconciliation periods.

When You’d Use New York Form ST-809 (2023)

You must use this form if your business meets certain criteria or falls under specific filing requirements:

  • Monthly filing requirement: You are required to file New York Form ST-809 (2023) every month if you have been classified as a part-quarter sales filing entity based on sales volume thresholds.

  • Sales volume threshold: Businesses whose taxable sales and purchases are subject to use tax, totaling $300,000 or more in any quarter, are automatically moved to monthly filing by the Department of Taxation and Finance.

  • No-tax-due months: Even if you have no taxable sales in a given month, you are still required to file a return and indicate that no tax is due to avoid penalties.

  • Replacement for quarterly filing: While this form replaces the need for monthly quarterly reporting, it does not replace the requirement to file the NY quarterly tax return (Form ST-810) for reconciliation.

Key Rules or Details for 2023

There are specific filing rules and thresholds that apply to New York Form ST-809 (2023) for the 2023 tax year:

  • Electronic filing mandate: Most filers must submit their returns through the Department’s Business Online Services system if they use a computer, prepare their own returns, or are required to e-file for other taxes.

  • Due dates and filing frequency: This form is due by the 20th day of the month following the reporting period, meaning filers must submit twelve returns each year.

  • Calculation methods: Businesses may choose between the long process, which reports actual monthly sales and taxes, or the short procedure, which calculates one-third of the tax due for the same quarter in the previous year.

  • Penalty structure: Penalties for late filing begin at $50, with an additional 10 percent of tax due in the first month and 1 percent for each subsequent month, up to a maximum of 30 percent.

  • Quarterly reconciliation requirement: Filing monthly does not eliminate the need to file Form ST-810, which reconciles monthly reports and breaks down sales by locality.

Step-by-Step (High Level)

To complete New York Form ST-809 (2023) accurately, follow these key steps in order:

  1. Gather monthly sales records: Collect all sales data for the reporting month, including taxable sales, exempt sales with proper certificates, and any purchases subject to use tax.

  2. Select a calculation method: Choose either the long process to report actual sales and taxes or the short method to estimate one-third of the prior year’s comparable quarter, if eligible.

  3. Complete filer information: Enter your business’s sales tax ID, legal name, and mailing address, and confirm the form’s reporting period and due date match the month being filed.

  4. Calculate tax due: Use the appropriate tax rates to calculate state and local sales tax, then apply any eligible credits or prepayments to determine the net amount owed.

  5. Review penalties and payment amounts: If the return is late, calculate any penalties and interest using the department's guidelines before entering the total amount due.

  6. Submit and retain confirmation: File electronically through Business Online Services unless exempt, and retain submission confirmation and supporting records for at least three years.

Common Mistakes and How to Avoid Them

Avoiding frequent errors on New York Form ST-809 (2023) can help prevent penalties, delays, and audit triggers:

  • Failing to file during zero-sales months: File a no-tax-due return even if no sales occurred to avoid the mandatory $50 penalty.

  • Including sales tax in reported sales: Report gross sales before tax; do not include collected sales tax in the amounts entered in Boxes 1 through 3.

  • Misusing the short method: Always adjust for local tax rate changes when using the short process, or risk underpaying or overpaying tax.

  • Missing the quarterly reconciliation: Filing Form ST-809 does not replace your obligation to submit Form ST-810, which reconciles and reports by locality.

  • Claiming unsupported credits: Attach proper documentation for any credits claimed and consider filing Form AU-11 if requesting a refund for overpaid tax.

What Happens After You File

Once New York Form ST-809 (2023) is filed and payment is submitted, the New York State Department of Taxation and Finance processes the return and applies payments to your monthly liability. Electronic filers receive confirmation upon submission, while paper filers are processed in the order received. If any amount is unpaid or filed late, a notice is sent showing penalties and interest owed. Businesses must still file a New York quarterly tax return (Form ST-810) to reconcile monthly filings and claim the vendor collection credit if eligible.

FAQs

When does the part-quarter sales filing begin after crossing the threshold?

Part-quarter sales filing begins the first month of the next sales tax quarter after your taxable transactions reach $300,000 in any single quarter.

Can I switch between calculation methods every month?

Yes, you can choose between the long method and the short method each month, provided you meet the short method’s eligibility requirements.

Do I need to submit a New York quarterly tax return even if I file monthly?

Yes, Form ST-810 must be filed quarterly to reconcile your monthly filings and break down sales by locality.

Is New York Form ST-809 (2023) required during months with no sales?

Yes, you must still file the form and report zero sales to avoid late filing penalties, even when no tax is due.

Does this state sales tax return include sales outside New York?

No, only sales where delivery occurs within New York State are reported on this state sales tax return.

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