Form W-9. The IRS requires contractors to fill out a Form W-9, a request for a Taxpayer Identification Number and Certification, which you should keep on file for at least four years after the hiring. This form is used to request the correct name and Taxpayer Identification Number, or TIN, of the worker or their entity ...
The IRS requires a flat 30% withholding on ALL types of payments to foreign national individuals UNLESS: The individual has a U.S. tax identification number (SSN or ITIN) and qualifies for a tax reduction under the tax treaty between the U.S. and their country of tax residency.
Exemption from withholding To qualify for this exempt status, the employee must have had no tax liability for the previous year and must expect to have no tax liability for the current year. A Form W-4 claiming exemption from withholding is valid for only the calendar year in which it's furnished to the employer.
All persons ('withholding agents') making US-source fixed, determinable, annual, or periodical (FDAP) payments to foreign persons generally must report and withhold 30% of the gross US-source FDAP payments, such as dividends, interest, royalties, etc.
Payments to a foreign corporation in exchange for personal services performed in the US by either a US citizen or alien is considered to be US-sourced income and is usually subject to withholding. (Can be wages or self-employment income.)
When you combine the federal, state, and NYC taxes, the total tax burden for someone earning $200,000 in NYC will be around $61,700. This results in an after-tax income of approximately $138,300 per year.