2005 Notices: Weighted Average
Interest Rate Monthly Updates
These documents are monthly Notices published in IRS's weekly Internal Revenue Bulletin (IRB) that
provide guidance as to the corporate bond weighted average interest rates for each month in 2005
and the permissible range of interest rates specified under Section 412(b)(5)(B)(ii)(II) of the
Internal Revenue Code. In addition, they provide guidance as to the interest rates on 30-year Treasury
securities under Section 417(e)(3)(A)(ii)(II), and the weighted average interest rates and permissible
ranges of interest rates based on the 30-year Treasury securities rate.
Notices are either in HTML or in the Adobe Acrobat PDF format. Internal Revenue Bulletin Summary pages are in HTML format.
| Notices |
Bulletin |
Date of IRB |
 |
| |
| Notice 2005-96(PDF)) |
IRB #2005-52(HTML) |
December 27, 2005 |
| Weighted average interest rate update; corporate bond indices; 30-year Treasury securities. The weighted average interest rate for December 2005 and the resulting permissible range of interest rates used to calculate current liability and to determine the required contribution are set forth. |
| Notice 2005-72(HTML) |
IRB #2005-47(HTML) |
November 21, 2005 |
| Weighted average interest rate update; corporate bond indices; 30-year Treasury securities. The weighted average interest rate for November 2005 and the resulting permissible range of interest rates used to calculate current liability and to determine the required contribution are set forth. |
| Notice 2005-71(HTML) |
IRB #2005-44(HTML) |
October 31, 2005 |
| Weighted average interest rate update; corporate bond indices; 30-year Treasury securities. The weighted average interest rate for October 2005 and the resulting permissible range of interest rates used to calculate current liability and to determine the required contribution are set forth. |
| Notice 2005-67(HTML) |
IRB #2005-40(HTML) |
October 3, 2005 |
| Weighted average interest rate update; corporate bond indices; 30-year Treasury securities. The weighted average interest rate for September 2005 and the resulting permissible range of interest rates used to calculate current liability and to determine the required contribution are set forth. |
| Notice 2005-63(HTML) |
IRB #2005-35(HTML) |
August 29, 2005 |
| Weighted average interest rate update; corporate bond indices; 30-year Treasury securities. The weighted average interest rate for August 2005 and the resulting permissible range of interest rates used to calculate current liability and to determine the required contribution are set forth. |
| Notice 2005-54(HTML) |
IRB #2005-30(HTML) |
July 25, 2005 |
| Weighted average interest rate update; corporate bond indices; 30-year Treasury securities. The weighted average interest rate for July 2005 and the resulting permissible range of interest rates used to calculate current liability and to determine the required contribution are set forth. |
| Notice 2005-46(PDF, 58K) |
IRB #2005-26(HTML) |
June 27, 2005 |
| Weighted average interest rate update; corporate bond indices; 30-year Treasury securities. The weighted average interest rate for June 2005 and the resulting permissible range of interest rates used to calculate current liability and to determine the required contribution are set forth. |
| Notice 2005-39(PDF, 39K) |
IRB #2005-21(HTML) |
May 23, 2005 |
| Weighted average interest rate update; corporate bond indices; 30-year Treasury securities. The weighted average interest rate for May 2005 and the resulting permissible range of interest rates used to calculate current liability and to determine the required contribution are set forth. |
| Notice 2005-34(PDF, 47K) |
IRB #2005-17(HTML) |
April 25, 2005 |
| Weighted average interest rate update; corporate bond indices; 30-year Treasury securities. The weighted average interest rate for April 2005 and the resulting permissible range of interest rates used to calculate current liability and to determine the required contribution are set forth. |
| Notice 2005-26(PDF, 105K) |
IRB #2005-12(HTML) |
March 21, 2005 |
| Weighted average interest rate update; corporate bond indices; 30-year Treasury securities. The weighted average interest rate for March 2005 and the resulting permissible range of interest rates used to calculate current liability and to determine the required contribution are set forth. |
| Notice 2005-19(PDF, 83K) |
IRB #2005-9(HTML) |
February 28, 2005 |
| Weighted average interest rate update; corporate bond indices; 30-year Treasury securities. The weighted average interest rate for February 2005 and the resulting permissible range of interest rates used to calculate current liability and to determine the required contribution are set forth. |
| Notice 2005-9(PDF, 79K) |
IRB #2005-4(HTML) |
January 24, 2005 |
| Weighted average interest rate update; corporate bond indices; 30-year Treasury securities. The weighted average interest rate for January 2005 and the resulting permissible range of interest rates used to calculate current liability and to determine the required contribution are set forth. |
Back to 2005 Files of Interest for Tax Professionals
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