Income Tax Withholding

To know how much income tax to withhold from employees' wages, you should have a Form W-4, Employee's Withholding Allowance Certificate, on file for each employee. Ask all new employees to give you a signed Form W-4 when they start work. Make the form effective with the first wage payment. If a new employee does not give you a completed Form W-4, withhold tax as if he or she is single, with no withholding allowances.

You may establish a system to electronically receive Form W-4 from your employees. See Regulation 31.3402(f)(5)-1 for more information.

A Form W-4 remains in effect until the employee gives you a new one. If an employee gives you a Form W-4 that replaces an existing Form W-4, begin withholding no later than the start of the first payroll period ending on or after the 30th day from the date you received the replacement Form W-4. For exceptions, see Exemption from income tax withholding, Sending certain Forms W-4 to the IRS, and Invalid Forms W-4 below.

The amount of income tax withholding must be based on marital status and withholding allowances. Your employees may not base their withholding amounts on a fixed dollar amount or percentage. However, the employee may specify a dollar amount to be withheld in addition to the amount of withholding based on filing status and withholding allowances claimed on Form W-4.

Employees may claim fewer withholding allowances than they are entitled to claim. They may wish to claim fewer allowances to ensure that they have enough withholding or to offset other sources of taxable income that are not subject to adequate withholding.

Note: A Form W-4 that makes a change for the next calendar year will not take effect in the current calendar year.

See Pub. 505, Tax Withholding and Estimated Tax, for detailed instructions for completing Form W-4. Along with Form W-4, you may wish to order Pub. 505 and Pub. 919, How Do I Adjust My Withholding?

When you receive a new Form W-4, do not adjust withholding for pay periods before the effective date of the new form. Also, do not accept any withholding or estimated tax payments from your employees in addition to withholding based on their Form W-4. If they require additional withholding, they should submit a new Form W-4 and, if necessary, pay estimated tax by filing Form 1040-ES, Estimated Tax for Individuals.

Exemption from income tax withholding. Generally, an employee may claim exemption from income tax withholding because he or she had no income tax liability last year and expects none this year. See the Form W-4 instructions for more information. However, the wages are still subject to social security and Medicare taxes.

A Form W-4 claiming exemption from withholding is valid for only one calendar year. To continue to be exempt from withholding in the next year, an employee must file a new Form W-4 by February 15 of that year. If the employee does not give you a new Form W-4, withhold tax as if the employee is single with zero withholding allowances.

Withholding on nonresident aliens. In general, if you pay wages to nonresident aliens, you must withhold income tax (unless excepted by regulations), social security, and Medicare taxes as you would for a U.S. citizen. However, income tax withholding from the wages of nonresident aliens is subject to the special rules shown in Form W-4 below. You must also give a Form W-2 to the nonresident alien and file it with the SSA. The wages are subject to FUTA tax as well. However, see Pub. 515, Withholding of Tax on Nonresident Aliens and Foreign Corporations, and Pub. 519, U.S. Tax Guide for Aliens, for exceptions to these general rules.

Form W-4. When completing Form W-4 nonresident aliens are required to:

• Not claim exemption from income tax withholding.
• Request withholding as if they are single, regardless of their actual marital status.
• Claim only one allowance (if the nonresident alien is a resident of Canada, Mexico, Japan, or Korea, he or she may claim more than one allowance).
• Request an additional income tax withholding amount, depending on the payroll period, as follows:

nonresident

Note: Nonresident alien students from India are not subject to the additional income tax withholding requirement.

Nonwage withholding. In some cases, an Internal Revenue Code section or a U.S. treaty provision will exempt payments to a nonresident alien from wages. These payments are not subject to regular income tax withholding. Form W-2 is not required in these cases. Instead, the payments are subject to withholding at a flat 30% or lower treaty rate, unless exempt from tax because of a Code or U.S. tax treaty provision.

Report these payments and any withheld tax on Form 1042-S, Foreign Person's U.S. Source Income Subject to Withholding. Form 1042-S is sent to the IRS with Form 1042, Annual Withholding Tax Return for U.S. Source Income of Foreign Persons. You may have to make deposits of the withheld income tax, using Form 8109, Federal Tax Deposit Coupon, or EFTPS (see page 20). See Pub. 515 and the Instructions for Form 1042-S for more information.

Sending certain Forms W-4 to the IRS. You must send to the IRS copies of certain Forms W-4 received during the quarter from employees still employed by you at the end of the quarter. Send copies when the employee claims (1) more than 10 withholding allowances or (2) exemption from withholding and his or her wages would normally be more than $200 per week. You are not required to send any other Forms W-4 unless the IRS notifies you in writing to do so.

Send in Forms W-4 that meet either of the above conditions each quarter with Form 941. Complete boxes 8 and 10 on any Forms W-4 you send in. You may use box 9 to identify the office responsible for processing the employee's payroll information. Also send copies of any written statements from employees in support of the claims made on Forms W-4. Send these statements even if the Forms W-4 are not in effect at the end of the quarter. You can send them to the IRS more often if you like. If you do so, include a cover letter giving your name, address, EIN, and the number of forms included. In certain cases, the IRS may notify you in writing that you must submit specified Forms W-4 more frequently, separate from your Form 941.

Note: Please make sure that the copies of Form W-4 you send to the IRS are clear and legible.

If your Forms 941 are filed on magnetic media, this Form W-4 information also should be filed with the IRS on magnetic media. (See Filing Form W-4 on magnetic media below.) If you file Form 941 electronically or by TeleFile, send your paper Forms W-4 to the IRS with a cover letter. Magnetic media filers of Form 941 also may send paper Forms W-4 to the IRS with a cover letter if they are unable to file them on magnetic media.

Note: Any Form W-4 you send to the IRS without a Form 941 should be mailed to the "Return without payment" address on the back of Form 941.

Base withholding on the Forms W-4 that you send in unless the IRS notifies you in writing to do otherwise. If the IRS notifies you about a particular employee, base withholding on the number of withholding allowances shown in the IRS notice. The employee will get a similar notice directly from the IRS. If the employee later gives you a new Form W-4, follow it only if (1) exempt status is not claimed or (2) the number of withholding allowances is equal to or fewer than the number in the IRS notice. Otherwise, disregard it and do not submit it to the IRS. Continue to follow the IRS notice.

If the employee prepares a new Form W-4 explaining any difference with the IRS notice, he or she may either submit it to the IRS or to you. If submitted to you, send the Form W-4 and explanation to the IRS office shown in the notice. Continue to withhold based on the notice until the IRS tells you to follow the new Form W-4.

Filing Form W-4 on magnetic media. Form W-4 information may be filed with the IRS on magnetic media. If you wish to file on magnetic media, you must submit Form 4419, Application for Filing Information Returns Magnetically/Electronically, to request authorization. See Pub. 1245, Specifications for Filing Form W-4, Employee's Withholding Allowance Certificate, Magnetically or Electronically. To get more information about magnetic media filing, call the IRS Martinsburg Computing Center at 304-263-8700.

Invalid Forms W-4. Any unauthorized change or addition to Form W-4 makes it invalid. This includes taking out any language by which the employee certifies that the form is correct. A Form W-4 is also invalid if, by the date an employee gives it to you, he or she indicates in any way that it is false. An employee who files a false Form W-4 may be subject to a $500 penalty.

When you get an invalid Form W-4, do not use it to figure withholding. Tell the employee it is invalid and ask for another one. If the employee does not give you a valid one, withhold taxes as if the employee were single and claiming no withholding allowances. However, if you have an earlier Form W-4 for this worker that is valid, withhold as you did before.

Amounts exempt from levy on wages, salary, and other income. If you receive a Notice of Levy on Wages, Salary, and Other Income (Forms 668-W, 668-W(c), or 668-W(c)(DO), you must withhold amounts as described in the instructions for these forms. Pub. 1494, Table for Figuring Amount Exempt From Levy on Wages, Salary, and Other Income (Forms 668-W(c) and 668-W(c)(DO)) 2001, shows the exempt amount.

Social Security and Medicare Taxes

The Federal Insurance Contributions Act (FICA) provides for a Federal system of old-age, survivors, disability, and hospital insurance. The old-age, survivors, and disability insurance part is financed by the social security tax. The hospital insurance part is financed by the Medicare tax. Each of these taxes is reported separately.

Social security and Medicare taxes are levied on both you and your employees (unless you or your employees are not subject to these taxes; see section 15). You, as an employer, must withhold and deposit the employee's part of the taxes, and you must pay a matching amount. Generally, employee wages are subject to social security and Medicare taxes regardless of the employee's age or whether he or she is receiving social security benefits. (If the employee reported tips, see section 6.)

Tax rates and the social security wage base limit. These taxes have different tax rates and only social security tax has a wage base limit. The wage base limit is the maximum wage that is subject to the tax for the year. Determine the amount of withholding for social security and Medicare taxes by multiplying each payment by the employee tax rate. There are no withholding allowances for social security and Medicare taxes.

The employee tax rate for social security is 6.2% (amount withheld). The employer tax rate for social security is also 6.2% (12.4% total). The 2000 wage base limit was $76,200. For 2001, the wage base limit is $80,400.

The employee tax rate for Medicare is 1.45% (amount withheld). The employer tax rate for Medicare tax is also 1.45% (2.9% total). There is no wage base limit for Medicare tax; all covered wages are subject to Medicare tax.

Successor employer. If you received all or most of the property used in the trade or business of another employer, or a unit of that employer's trade or business, you may include the wages the other employer paid to your employees when you figure the annual wage base limit for social security. See Regulations section 31.3121(a)(1)-1(b) for more information. Also see Rev. Proc. 96-60, 1996-2 C.B. 399, for the procedures used in filing returns in a predecessor-successor situation.

Example: Early in 2000, you bought all the assets of a plumbing business from Mr. Martin. Mr. Brown, who had been employed by Mr. Martin and received $2,000 in wages before the date of purchase, continued to work for you. The wages you paid Mr. Brown are subject to social security taxes on the first $74,200 ($76,200 less $2,000). Medicare tax is due on all wages you pay him during the calendar year.

International social security agreements. The United States has social security agreements with many countries that eliminate dual taxation and dual coverage. Compensation subject to social security and Medicare taxes may be exempt under one of these agreements. You can get more information and a list of agreement countries from SSA at www.ssa.gov/international, or see Pub. 15-A, Employer's Supplemental Tax Guide.

Part-Time Workers

For income tax withholding and social security, Medicare, and Federal unemployment (FUTA) tax purposes, there are no differences among full-time employees, part-time employees, and employees hired for short periods. It does not matter whether the worker has another job or has the maximum amount of social security tax withheld by another employer. Income tax withholding may be figured the same way as for full-time workers. Or it may be figured by the part-year employment method explained in Pub. 15-A.

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