Form IT-638 Instructions: START-UP NY Tax Elimination Credit (Tax Year 2025)

Form IT-638 is the New York State tax form used to claim the START-UP NY Tax Elimination Credit. This credit is one of the core benefits offered to businesses and employees participating in the START-UP NY program, which allows qualifying companies operating in designated tax-free areas near New York colleges and universities to eliminate certain state tax liabilities. The IT638I instructions booklet walks filers through exactly how to calculate and report this credit correctly on their New York State income tax return.

The credit itself is designed to reduce a business’s New York State tax to zero, or close to it, for approved START-UP NY participants during their benefit period. Instead of simply lowering the tax bill, this credit works by eliminating the tax liability that would otherwise be owed, making it one of the more valuable incentives tied to the program. It applies to corporations, partnerships, and sole proprietors, as well as individual employees whose wages are excluded from taxable income under the START-UP NY wage exclusion rules.

Who Needs Form IT-638

This form is intended for businesses that have been formally accepted into the START-UP NY program and have received certification confirming their status as a participating business. It’s also relevant to individual shareholders, partners, or members of pass-through entities that operate within the program, since the credit flows through to personal income tax returns in many cases.

If your business signed a agreement with a sponsoring college or university and was approved to operate in a tax-free NY area, you’ll likely need to file this form alongside your regular New York State tax return. Employees working for a START-UP NY business may also need related documentation, though the wage exclusion itself is typically handled through a separate reporting mechanism tied to payroll.

When to Use This Form

Form IT-638 is filed annually as part of your New York State tax filing for any year in which your business or you, as an individual, are eligible for the credit. Eligibility is tied directly to your business’s certification period under the START-UP NY program, which generally lasts up to ten years depending on the terms of your agreement. You’ll need to reference your certification information, including your business’s identifying details and the tax-free NY area where you operate, when completing the form.

It’s worth noting that this credit is closely connected to other START-UP NY tax provisions. For example, businesses that eventually lose their eligibility or fail to meet program requirements may need to review Form IT-645 instructions on recapturing START-UP NY tax benefits, since previously claimed credits can be subject to repayment under certain circumstances. Businesses using telecommunication services within a tax-free NY area might also want to check the START-UP NY Telecommunication Services Excise Tax Credit instructions, as multiple START-UP NY credits can sometimes apply to the same business in the same tax year.

How to Get and Complete the Form

Form IT-638 and its accompanying IT638I instructions are available directly from the New York State Department of Taxation and Finance website as a PDF. This form does not have digitally fillable fields, so you’ll need to download it, print it, and complete it by hand using black ink. Once filled out, it gets attached to your New York State personal income tax return or corporate franchise tax return, depending on your business structure.

Before filling it out, gather your START-UP NY certification documents, your business’s federal employer identification number, and details about the tax-free NY area where your business operates. The instructions booklet includes line-by-line guidance for calculating the credit amount, and it’s a good idea to review these instructions in full before starting, since errors in reporting certification details are one of the most common reasons for processing delays.

If your business also qualifies for other economic recovery incentives, it may be worth reviewing the Recovery Tax Credit instructions on Form IT-651 to see whether additional credits apply to your situation for the same tax year.