CCA 1042031: Federal agencies may coordinate or separately handle excess Social Security withholding

Plain-English summary

Chief Counsel Advice addressed how two federal agencies should handle Social Security wages paid to the same employee in one calendar year. It stated that the federal government is treated as one employer, so the Social Security wage base applies once to those wages. Under IRC § 3122, the agencies may coordinate to prevent withholding above the wage base, or they may withhold without coordinating. The employee may claim a credit on Form 1040 for excess Social Security taxes, and the agencies may seek a refund or adjustment after year end if they obtain the employee's consent as described in the advice.

Ruling snapshot

• Question: How should two federal agencies handle Social Security taxes when they pay the same employee in one calendar year?
• Outcome: Advice given
• Key authorities: IRC §§ 3122 and 6413(c)(2)(A)

Full text (IRS public release)

ID: CCA_2010082315575932 Number: 201042031
Release Date: 10/22/2010
Office: -----------------------------
UILC: 3122.00-00

From: --------------------
Sent: Monday, August 23, 2010 3:58:07 PM
To: ----------------------
Cc:
Subject: RE: [ --------------------------- ]

Here is a quick and simple summary of what the letter says:

1) The federal government is considered one big employer, so two federal agencies that pay wages to an
employee in a single calendar year only need to go up the social security wage base one time.

2) Section 3122 gives federal agencies flexibility on how to deal with wage base issues. If both federal
agencies make payments to the same employee in a single calendar year, they can either: i) coordinate
with each other to make sure that no social security tax is paid on wages in excess of the wage base; or
ii) not coordinate with each other and simply withhold and pay social security taxes on wages paid to the
employee without regard to the wage base.

3) Regardless of which option the federal agencies use, the employee can take a credit on their 1040 for
any social security taxes paid on wages exceeding the wage base (see section 6413(c)(2)(A), which
provides that the two federal agencies are treated as separate employers for purposes of the credit
employees get on their 1040 for excess FICA).

4) The agencies could also seek a refund (or adjustment) of FICA paid on wages exceeding the wage
base after the close of the calendar year but if they do this, then they need to go through the process of
seeking the employee's consent to request a refund on the employee's behalf.