How to Complete and File the NYC-3L General Corporation Tax Return

The NYC-3L General Corporation Tax return is the long-form GCT return filed with the New York City Department of Finance by S corporations that do business in the five boroughs and have operations complex enough to disqualify them from the shorter NYC-4S. You start from your federal Form 1120-S, calculate the tax under four alternative bases, and pay whichever base produces the highest amount. The return is due by the 15th day of the third month after your tax year closes.

Is NYC-3L the Right Form for Your S Corporation

Since January 1, 2015, the General Corporation Tax applies only to subchapter S corporations and qualified subchapter S subsidiaries. Every other corporation files under the separate Business Corporation Tax on Form NYC-2 or NYC-2A instead.¹ So the first question is whether your federal S election is in place; if it isn’t, NYC-3L is not your form.

Any domestic or foreign S corporation doing business in New York City, employing capital there, owning or leasing property in the city, or maintaining an office within the five boroughs is subject to the GCT.² Holding inventory in a local warehouse, keeping a city office, or generating revenue through regular activity within the city each creates a filing obligation, regardless of where the corporation was formed.

Among S corporations that owe the GCT, the simpler ones file Form NYC-4S. You must use NYC-3L instead if your S corporation meets any of these conditions:³

It carries on business both inside and outside New York City.
It holds subsidiary capital or investment capital that must be reported separately.
It claims relocation credits, increased real estate tax payment credits, the beer production credit, or other credits specified in the NYC Administrative Code.
It will be included in a combined report on Form NYC-3A.
It has income under IRC Sections 951A or 965, or would have qualified for the FDII deduction under IRC Section 250(a)(1)(A) if it had not elected S corporation status.

What to Gather Before You Open the Form

The NYC-3L begins with federal taxable income and reworks it, so your completed federal Form 1120-S is the foundation for nearly every schedule. Pull together:

Federal Form 1120-S as filed.
Your Federal Employer Identification Number and the NAICS code for your primary business activity.
Property, receipts, and payroll totals both inside and outside New York City, for the Schedule H allocation.
Cost basis and fair market value data for any stocks, bonds, and subsidiary interests the corporation holds, for Schedules C and D.
Salaries and other compensation paid to elected or appointed officers and to any stockholder owning more than 5% of issued stock, for the alternative tax base on Schedule A.

The current form and instructions are posted on the Department of Finance website; the 2025 instructions cover tax years beginning in 2025.³

The Four-Base Calculation

NYC Administrative Code § 11-604 requires you to compute the tax under four methods and pay the highest.⁴ This structure applies through tax years beginning before January 1, 2027. Even a corporation that lost money for the year still owes whichever of the four amounts is largest; there is no zero-liability outcome.

Base 1: Entire Net Income

Apply 8.85% to the portion of entire net income allocated to New York City.⁴ Entire net income starts with federal taxable income and is adjusted for city-specific additions and subtractions on Schedule B. If you operate exclusively in the city, 100% is allocated here; otherwise your Schedule H business allocation percentage controls.

Base 2: Total Business and Investment Capital

Apply 1.5 mills per dollar (0.15%) to your total business and investment capital allocated to the city. The tax computed under this base is capped at $1,000,000.⁴ This base can bite in a lean income year when capital in the city is substantial.

Base 3: Alternative Tax on Income Plus Officer Compensation

Take 30% of entire net income, add back salaries and other compensation paid to elected or appointed officers and to any stockholder owning more than 5% of issued stock, subtract $15,000, then subtract any net loss for the year. Apply 8.85% to the result after city allocation.⁴ This base is aimed at closely held corporations whose owners draw down taxable income through large salaries.

Base 4: Fixed Dollar Minimum

Every filer owes at least a fixed minimum based on New York City receipts for the year, on this sliding scale for tax years beginning in 2009 and after:⁵

$100,000 or less: $25
$100,001 to $250,000: $75
$250,001 to $500,000: $175
$500,001 to $1,000,000: $500
$1,000,001 to $5,000,000: $1,500
$5,000,001 to $25,000,000: $3,500
Over $25,000,000: $5,000

Allocating Income If You Work In and Out of the City

If the corporation operates both inside and outside New York City, Schedule H computes a business allocation percentage using three factors:⁶

Property factor: NYC real and tangible personal property (including rented property valued at eight times annual rent) divided by total property everywhere.
Receipts factor: NYC business receipts divided by total business receipts.
Payroll factor: NYC payroll divided by total payroll.

Add the three percentages and divide by three. If a factor is missing entirely (both numerator and denominator are zero), divide by the number of remaining factors instead. A factor is not missing just because its numerator is zero; if you have payroll everywhere but none in NYC, the payroll factor is zero and still counts in the denominator.⁷ Manufacturers may elect to double-weight the receipts factor and divide by four, but the election has to be made on a timely filed original return.⁶

Net Operating Losses and Credits

The city generally follows IRC Section 172 for NOL deductions, with a few local wrinkles. NOLs generated in 2018 or later cannot be carried back (with narrow exceptions), may be carried forward indefinitely, and are limited to 80% of federal taxable income in any single year. For losses sustained in tax years ending after June 30, 1989, the city limits any carryback to the first $10,000 of loss in any tax year.⁸ Compute the deduction on Form NYC-NOLD-GCT and attach it to the return.

Two city credits come up often on NYC-3L returns. The Industrial Business Zone Relocation Credit is a one-time $1,000-per-worker credit, capped at $100,000 or actual moving costs (whichever is less), for industrial and manufacturing firms moving into a designated IBZ, claimed on Form NYC-9.6.⁹ The Relocation and Employment Assistance Program credit pays $3,000 per eligible employee per year for up to 12 years when a business relocates to above 96th Street in Manhattan or to any of the other four boroughs from outside the city or below 96th Street; the business must have operated in its prior location for at least 24 continuous months, and the credit is refundable for the relocation year and the following four years. In eligible areas outside designated revitalization zones, the credit drops to $1,000 per employee and is nonrefundable. The program runs through June 30, 2028, and unused credits carry forward up to five years.¹⁰

Deadlines, Extensions, and Quarterly Estimates

The NYC-3L is due by the 15th day of the third month after your tax year ends — March 15 for calendar-year filers. Form NYC-EXT, filed on or before the due date, buys an automatic six-month extension to file. It does not extend time to pay: you must properly estimate the liability and remit any balance due with the extension form, and interest on unpaid balances runs from the original due date regardless.¹² For calendar-year corporations, installments are due April 15, June 15, September 15, and January 15 of the following year. To avoid a separate underpayment penalty, base estimates on at least 90% of the current year’s final tax or 100% of the prior year’s tax if that year covered 12 months.¹³

How to File and Pay

The Department of Finance requires electronic filing of NYC-3L returns through the Business Tax e-File program, and tax preparers and businesses filing 100 or more NYC returns must e-file.¹⁴ Approved software handles the submission.

Where paper filing is permitted, the mailing address depends on what you are sending:¹⁵

Return with payment voucher (NYC-200V): NYC Department of Finance, P.O. Box 3933, New York, NY 10008-3933.
Return without payment: NYC Department of Finance, P.O. Box 5564, Binghamton, NY 13902-5564.
Return claiming a refund: NYC Department of Finance, P.O. Box 5563, Binghamton, NY 13902-5563.

Payments can go through the NYC CityPay portal, which accepts credit cards, debit cards, and electronic checks without an account, or by electronic funds transfer from a business bank account.¹⁶ Keep the payment confirmation and a copy of the filed return; the Department of Finance may request documentation during a compliance review.

What Late Filing and Late Payment Cost

Late filing and late payment carry separate penalties that stack:¹⁷

Late filing: 5% of the net tax owed per month or partial month, up to 25% over five months. A return more than 60 days late carries a minimum penalty of $100 or the full tax due, whichever is less.
Late payment: 0.5% of the net tax owed per month or partial month, up to 25% over 50 months.

Interest on underpayments compounds daily at rates set quarterly. For January through March 2026 the rate is 11%; for April through June 2026 it drops to 10%.¹⁸ Rates change each quarter, so check the Department of Finance site for the current period if you are filing outside those windows. Interest runs from the original due date until payment, even with a valid filing extension.

1
New York City Department of Finance. General Corporation Tax
2
American Legal Publishing. New York City Administrative Code 11-603 – Imposition of Tax; Exemptions
3
New York City Department of Finance. Instructions for Form NYC-3L
4
American Legal Publishing. New York City Administrative Code 11-604 – Computation of Tax
5
NYC Department of Finance. General Corporation Tax Rates
6
NYC Department of Finance. Instructions for Form NYC-3L
7
NYC Department of Finance. Rules Relating to the General Corporation Tax
8
NYC Department of Finance. Net Operating Loss Deduction Computation General Corporation Tax
9
NYC Business. Industrial Business Zone Relocation Credit
10
NYC Department of Finance. Relocation and Employment Assistance Program (REAP)
11
12
NYC Department of Finance. Application for Automatic Extension of Time to File Business Income Tax Returns – NYC-EXT
If your estimated GCT liability for the current year exceeds $1,000, you must file Form NYC-400 and make quarterly installment payments, even in the corporation’s first year or after a year in which it paid only the minimum tax.11NYC Department of Finance. Estimated Tax by Business Corporations and Subchapter S General Corporations
13
NYC Department of Finance. Application for Automatic Extension of Time to File Business Income Tax Returns – NYC-EXT
14
New York City Department of Finance. Business Tax e-File (BTeF)
15
New York City Department of Finance. Payment Mailing Addresses
16
NYC CityPay. NYC CityPay
17
New York City Department of Finance. Business Filing Information
18
NYC Department of Finance. Interest Rates on Tax Underpayments