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

What the New York Form ST-809 (2019) Is For

Part-quarterly filers use New York Form ST-809 (2019) to report monthly sales and use tax activity to the New York State Department of Taxation and Finance. This form applies to businesses that exceed the state’s filing threshold and are required to report more frequently. It captures total gross sales, taxable sales, and purchases subject to use tax, helping ensure accurate sales tax reporting in NY for the first two months of each quarter. Form ST-810 is used for the third month to reconcile the quarter.

When You’d Use New York Form ST-809 (2019)

You would use this form when your business meets specific thresholds or conditions under New York sales tax regulations.

  • Monthly filing requirement: You must file this form if your taxable sales or purchases subject to use tax reach $300,000 or more in a calendar quarter across all New York locations.

  • First two months of a quarter: This form is required to report tax collected during the first and second months of each quarter, with Form ST-810 used for reconciliation in the third month.

  • No-tax-due periods: You must file the return even when no taxable sales occurred during the reporting period to avoid penalties.

  • Late or amended filing: You are required to file this form if you missed the original deadline or need to correct an error on a previously submitted return.

Key Rules or Details for 2019

The 2019 version of this form adhered to specific rules regarding filing thresholds, methods, and compliance.

  • $300,000 filing threshold: You become a monthly filer if your combined taxable sales and purchases subject to use tax reach $300,000 or more during any calendar quarter.

  • Long method and short method: You must select one method per filing period and complete only the corresponding section, based on your eligibility and preference.

  • Electronic filing requirement: You are required to submit the form using the sales tax web file, unless you qualify for a paper filing exemption.

  • Penalty and interest rules: You may be subject to a $50 minimum penalty for late filing and daily interest charges on any unpaid tax balance.

  • Monthly to quarterly status changes: You must remain below the threshold for four consecutive quarters before requesting a return to quarterly filing.

Step-by-Step (High Level)

Filing New York Form ST-809 (2019) requires organized preparation and correct completion of all sections.

  1. Gather monthly records: You must collect all relevant documentation, including gross sales figures, taxable sales, purchases subject to use tax, and any documents supporting credits you intend to claim.

  2. Select a calculation method: You must choose either the long method or the short method, depending on your eligibility and consistency of sales, and use that method for both monthly filings within the quarter.

  3. Complete business identification: You are required to enter your sales tax identification number, legal business name as listed on your Certificate of Authority, and your current mailing address, noting any recent changes.

  4. Calculate tax due: Follow the instructions for your chosen method to report gross and taxable sales, use tax, credits, and any advance payments, ensuring that sales tax is not included in the reported transaction amounts.

  5. Add penalty and interest if applicable: You must calculate any penalties or interest for late filing using the department's online tools or assistance center and include those figures in the appropriate section.

  6. Submit and pay: You must file the completed form either through the sales tax web file or by mail if exempt, and include payment with proper identification details, such as your sales tax ID and filing period.

Common Mistakes and How to Avoid Them

Avoiding common filing mistakes can help prevent penalties, delays, or future audits.

  • Failing to file when no tax is due: Always file the return by the due date, even if there were no taxable sales during the month, to avoid a $50 penalty.

  • Using both calculation methods: Use either the long method or the short method for each return; do not complete both sections on the same filing.

  • Including sales tax in reported figures: Report only the pre-tax amounts for gross sales, taxable sales, and purchases to avoid inflating your liability.

  • Claiming unsupported credits: Keep documentation for all claimed credits, including supplier invoices and proof of tax paid to other jurisdictions, to support your entries in case of audit.

  • Forgetting quarterly reconciliation: Track your monthly payments and ensure that Form ST-810 accurately reconciles your entire quarter, which is essential for correct quarterly tax filing in New York.

What Happens After You File

After you submit New York Form ST-809 (2019), the New York State Department of Taxation and Finance will process your return and apply your payment to your account. Electronic filers can confirm processing through their Business Online Services account, while paper filers may experience longer confirmation times. Your monthly filings are considered preliminary and must be reconciled through Form ST-810 for the third month of the quarter. 

Overpayments may be refunded or carried forward to future periods. Errors or inconsistencies may result in a notice, and your account may be flagged for audit if reporting patterns appear irregular.

FAQs

Can I switch between the long method and the short method in different months?

Yes, you may switch methods if you are eligible for both; however, it is recommended to use the same method consistently within the quarter for accuracy and easier tracking.

Is New York Form ST-809 (2019) required if I made no taxable sales during the month?

Yes, the form must still be filed even when there are no taxable sales to report, as failure to file may result in penalties from the New York State Department of Taxation and Finance.

What is the purpose of using Form ST-810 if I already filed Form ST-809?

Form ST-810 is required for the third month of the quarter to reconcile your full quarterly sales tax liability and summarize payments from the previous two monthly returns.

How does New York Form ST-809 (2019) fit into the quarterly tax filing procedures in New York?

This form covers the first two months of the quarter and contributes to the final calculation and reporting process for quarterly tax filing in New York using Form ST-810.

Can I file New York Form ST-809 (2019) by mail if I do not have access to a computer?

You may file by mail only if you qualify for an exemption from the sales tax web file requirement, which generally applies to those without broadband internet or computer access.

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