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Interest rates: underpayments and overpayments. The rates for interest determined under Section 6621 of the code for the calendar quarter beginning January 1, 2018, will be 4 percent of overpayments (3 percent in the case of a corporation), 4 percent for underpayments, and 6 percent for large corporate underpayments. The rate of interest paid on the portion of a corporate overpayment exceeding $10,000 will be 1.5 percent.

This notice contains the 2017 Required Amendments List for individually designed qualified retirement plans. The list identifies certain changes in qualification requirements that became effective in 2017 that may require a retirement plan to be amended in order to remain qualified, and establishes the date by which any necessary amendment must be made.

This notice sets forth updates on the corporate bond monthly yield curve, the corresponding spot segment rates for December 2017 used under ¡ì 417(e)(3)(D), the 24-month average segment rates applicable for December 2017, and the 30-year Treasury rates. These rates reflect the application of ¡ì 430(h)(2)(C)(iv), which was added by the Moving Ahead for Progress in the 21st Century Act, Public Law 112¨C141 (MAP-21) and amended by section 2003 of the Highway and Transportation Funding Act of 2014 (HATFA).

This notice provides guidance on the application of sections 409A and 457A. Specifically, this guidance addresses the transition provisions enacted as part of section 457A that generally provide that amounts deferred and attributable to services performed before January 1, 2009, that would otherwise have been subject to inclusion in income under section 457A, are includible in gross income in the later of the last taxable year beginning before 2018 or the date of vesting. As amounts have become includible in income during 2017, stakeholders have raised questions concerning the ability to make distributions to pay the income taxes due on these amounts and still maintain compliance with section 409A. This notice provides that service recipients may accelerate distributions to pay income taxes on amounts includible in 2017 without violating section 409A. This notice supplements the guidance provided in Notice 2009¨C8, 2009¨C4 IRB 347 (January 26, 2009), and is not intended to supersede or modify any of the guidance provided in Notice 2009¨C8.

Section 6621 of the Internal Revenue Code establishes the interest rates on overpayments and underpayments of tax. Under section 6621(a)(1), the overpayment rate is the sum of the federal short-term rate plus 3 percentage points (2 percentage points in the case of a corporation), except the rate for the portion of a corporate overpayment of tax exceeding $10,000 for a taxable period is the sum of the federal short-term rate plus 0.5 of a percentage point. Under section 6621(a)(2), the underpayment rate is the sum of the federal short-term rate plus 3 percentage points.

Section 6621(c) provides that for purposes of interest payable under section 6601 on any large corporate underpayment, the underpayment rate under section 6621(a)(2) is determined by substituting ¡°5 percentage points¡± for ¡°3 percentage points.¡± See section 6621(c) and section 301.6621¨C3 of the Regulations on Procedure and Administration for the definition of a large corporate underpayment and for the rules for determining the applicable date. Section 6621(c) and section 301.6621¨C3 are generally effective for periods after December 31, 1990.

Section 6621(b)(1) provides that the Secretary will determine the federal short-term rate for the first month in each calendar quarter. Section 6621(b)(2)(A) provides that the federal short-term rate determined under section 6621(b)(1) for any month applies during the first calendar quarter beginning after that month. Section 6621(b)(3) provides that the federal short-term rate for any month is the federal short-term rate determined during that month by the Secretary in accordance with section 1274(d), rounded to the nearest full percent (or, if a multiple of 1/2 of 1 percent, the rate is increased to the next highest full percent).

Notice 88¨C59, 1988¨C1 C.B. 546, announced that in determining the quarterly interest rates to be used for overpayments and underpayments of tax under section 6621, the Internal Revenue Service will use the federal short-term rate based on daily compounding because that rate is most consistent with section 6621 which, pursuant to section 6622, is subject to daily compounding.

The federal short-term rate determined in accordance with section 1274(d) during October 2017 is the rate published in Revenue Ruling 2017¨C21, 2017¨C45 IRB 482, to take effect beginning November 1, 2017. The federal short-term rate, rounded to the nearest full percent, based on daily compounding determined during the month of October 2017 is 1 percent. Accordingly, an overpayment rate of 4 percent (3 percent in the case of a corporation) and an underpayment rate of 4 percent are established for the calendar quarter beginning January 1, 2018. The overpayment rate for the portion of a corporate overpayment exceeding $10,000 for the calendar quarter beginning January 1, 2018 is 1.5 percent. The underpayment rate for large corporate underpayments for the calendar quarter beginning January 1, 2018, is 6 percent. These rates apply to amounts bearing interest during that calendar quarter.

Sections 6654(a)(1) and 6655(a)(1) provide that the underpayment rate established under section 6621 applies in determining the addition to tax under sections 6654 and 6655 for failure to pay estimated tax for any taxable year. Thus, the 4 percent rate also applies to estimated tax underpayments for the first calendar quarter beginning January 1, 2018. Pursuant to section 6621(b)(2)(B), in determining the addition to tax under section 6654 for any taxable year for an individual, the federal short-term rate that applies during the third month following the taxable year also applies during the first 15 days of the 4th month following the taxable year. In addition, pursuant to section 6603(d)(4), the rate of interest on section 6603 deposits is 1 percent for the first calendar quarter in 2018.

Interest factors for daily compound interest for annual rates of 1.5 percent, 3 percent, 4 percent and 6 percent are published in Tables 8, 11, 13 and 17 of Rev. Proc. 95¨C17, 1995¨C1 C.B. 562, 565, 567 and 571.

Annual interest rates to be compounded daily pursuant to section 6622 that apply for prior periods are set forth in the tables accompanying this revenue ruling.

The principal author of this revenue ruling is Richard Duenas of the Office of the Associate Chief Counsel (Procedure and Administration). For further information regarding this revenue ruling, contact Mr. Duenas at (202) 317-6877 (not a toll-free number).

This notice contains the Required Amendments List for 2017 (2017 RA List). Section 5 of Rev. Proc. 2016¨C37, 2016¨C29 I.R.B. 136, provides that, in the case of an individually designed plan, the remedial amendment period for a disqualifying provision arising as a result of a change in qualification requirements generally is extended to the end of the second calendar year that begins after the issuance of the Required Amendments List (RA List) in which the change in qualification requirements appears. Pursuant to section 5.05(3) of Rev. Proc. 2016¨C37, this notice provides that December 31, 2019, is generally the last day of the remedial amendment period with respect to a disqualifying provision arising as a result of a change in qualification requirements that appears on this 2017 RA List. As a result, under sections 8.01 and 5.05(3) of Rev. Proc. 2016¨C37, December 31, 2019, is also generally the plan amendment deadline for a disqualifying provision arising as a result of a change in qualification requirements that appears on the 2017 RA List. However, a later date may apply to a governmental plan (as defined in ¡ì 414(d)) pursuant to sections 8.01 and 5.06(3) of Rev. Proc. 2016¨C37.

Section 401(b) of the Internal Revenue Code (Code) provides a remedial amendment period during which a plan may be amended retroactively to comply with the qualification requirements under ¡ì 401(a). Section 1.401(b)¨C1 describes the disqualifying provisions that may be amended retroactively and the remedial amendment period during which retroactive amendments may be adopted. Those regulations also grant the Commissioner the discretion to designate certain plan provisions as disqualifying provisions and to extend the remedial amendment period.

Rev. Proc. 2016¨C37 eliminates, as of January 1, 2017, the five-year remedial amendment cycle system for individually designed plans that was set forth in Rev. Proc. 2007¨C44, 2007¨C2 C.B. 54.

Sections 5.05(3) and 5.06(3) of Rev. Proc. 2016¨C37 extend the remedial amendment period for individually designed plans to correct disqualifying provisions that arise as a result of a change in qualification requirements. Under section 5.05(3), the remedial amendment period for a plan that is not a governmental plan (as defined in ¡ì 414(d)) is extended to the end of the second calendar year that begins after the issuance of the RA List on which the change in qualification requirements appears. Section 5.06(3) provides a special rule for governmental plans that could further extend the remedial amendment period in some cases.

Section 8.01 of Rev. Proc. 2016¨C37 provides that the plan amendment deadline with respect to a disqualifying provision described in section 5 of Rev. Proc. 2016¨C37 is the date on which the remedial amendment period ends with respect to that disqualifying provision.

Section 9 of Rev. Proc. 2016¨C37 provides that the Department of the Treasury (the Treasury Department) and the Internal Revenue Service (IRS) intend to publish annually an RA List. In general, a change in qualification requirements will not appear on an RA List until guidance with respect to that change (including, in certain cases, model amendments) has been provided in regulations or in other guidance published in the Internal Revenue Bulletin. However, in the discretion of the Treasury Department and the IRS, a change in qualification requirements may be included on an RA List in other circumstances, such as in cases in which a statutory change is enacted and the Treasury Department and the IRS anticipate that no guidance will be issued.

In general, an RA List includes statutory and administrative changes in qualification requirements that are first effective during the plan year in which the list is published.^[1] However, an RA List does not include guidance issued or legislation enacted after the list has been prepared and also does not include:

The RA List is divided into two parts. Part A covers changes in qualification requirements that generally would require an amendment to most plans or to most plans of the type affected by the change.

Part B includes changes in qualification requirements that the Treasury Department and the IRS anticipate will not require amendments to most plans, but might require an amendment because of an unusual plan provision in a particular plan. If a change affects a particular qualification requirement that most plans incorporate by reference, Part B would include the change because a particular plan might not incorporate the qualification requirement by reference and, thus, might contain language inconsistent with the change. For example, as provided in the 2016 RA List, if a defined benefit plan incorporates the limitation of ¡ì 436(d)(2) by reference to the statute or regulations (or through the use of the sample amendment in Notice 2011¨C96, 2011¨C52 I.R.B. 915), no amendment to the plan would be required to comply with the changes made by section 2003 of the Highway Transportation and Funding Act of 2014. P.L. 113¨C159. However, a plan that sets forth the substantive requirements of ¡ì 436(d)(2) and that does not incorporate the limitation of ¡ì 436(d)(2) by reference to the statute or regulations, or through the use of the sample amendment in Notice 2011¨C96, may need to be amended.

Annual, monthly, or other periodic changes to (1) the various dollar limits that are adjusted for cost of living increases as provided in ¡ì 415(d) or other Code provisions, (2) the spot segment rates used to determine the applicable interest rate under ¡ì 417(e)(3), and (3) the applicable mortality table under ¡ì 417(e)(3), are treated as included on the RA List for the year in which such changes are effective even though they are not directly referenced on that RA List. The Treasury Department and the IRS anticipate that few plans have language that will need to be amended on account of these changes.

The fact that a change in a qualification requirement is included on the RA List does not mean that a plan must be amended as a result of that change. Each plan sponsor must determine whether a particular change in a qualification requirement requires an amendment to its plan.

The principal author of this notice is Angelique Carrington of the Office of Associate Chief Counsel (Tax Exempt and Government Entities). For further information regarding this notice, contact Ms. Carrington at (202) 317-4148 (not a toll-free number).

This notice provides guidance on the application of Internal Revenue Code (Code) section 409A with respect to amounts that are includible in income pursuant to section 801(d)(2) of the Tax Extenders and Alternative Minimum Tax Relief Act of 2008, Div. C of Pub. L. No. 110¨C343 (TEAMTRA). Section 801(a) of TEAMTRA added section 457A to the Code. Section 457A generally applies to deferred amounts that are attributable to services performed after December 31, 2008. However, if section 457A does not apply to a deferred amount solely because the amount is attributable to services performed before 2009, section 801(d)(2) of TEAMTRA provides that the amount is includible in gross income in the later of the last taxable year beginning before 2018 or the taxable year of vesting. This guidance provides that a nonqualified deferred compensation plan that is subject to the provisions of Code section 409A will not fail to meet the requirements of section 409A solely because payments of deferred amounts under the plan are accelerated to pay income taxes on the amounts includible in income pursuant to section 801(d)(2) of TEAMTRA. This notice is intended to supplement, not supersede or modify, the guidance provided in Notice 2009¨C8, 2009¨C4 IRB 347 (Jan. 26, 2009).

Pursuant to the authority provided in section 409A(a)(3), the Department of the Treasury (Treasury Department) and the Internal Revenue Service (IRS) intend to issue regulations applicable as of December 08, 2017 providing the relief set forth in this paragraph; taxpayers may rely on the relief described in this paragraph until the regulations are finalized. The regulations will permit the acceleration of payments under a nonqualified deferred compensation plan to pay Federal, state, local, and foreign income taxes due on pre-2009 section 457A deferrals that are includible in gross income. Specifically, the Treasury Department and the IRS intend to issue regulations providing that a change in the time and form of payment under a nonqualified deferred compensation plan to pay Federal, state, local, and foreign income taxes on pre-2009 section 457A deferrals will not be treated as an impermissible acceleration under section 409A(a)(3) and ¡ì 1.409A¨C3(j)(1). These regulations will also provide that, to the extent a deferred amount attributable to services performed before January 1, 2009, was earned and vested before December 31, 2004, and is not otherwise subject to the requirements of section 409A due to the effective date rules under ¡ì 1.409A¨C6, a change in the time and form of payment of the deferred amount to pay Federal, state, local, and foreign income taxes on pre-2009 section 457A deferrals will not be treated as a material modification of such arrangement under ¡ì 1.409A¨C6(a)(4). The relief provided in these regulations will apply only to the extent that that the amount of any distribution to pay Federal, state, local, and foreign income taxes on pre-2009 section 457A deferrals is not more than an amount equal to the Federal, state, local, and foreign income tax withholding that would have been remitted by an employer if there had been a payment of wages equal to the income includible by the service provider under section 801(d)(2) of TEAMTRA.

The principal author of this notice is William McNally of the Office of Associate Chief Counsel (Tax Exempt and Government Entities). However, other personnel from the Treasury Department and the IRS participated in its development. For further information regarding this notice, contact Mr. McNally at (202) 317-5600 (not a toll-free number).

This notice provides guidance on the corporate bond monthly yield curve, the corresponding spot segment rates used under ¡ì 417(e)(3), and the 24-month average segment rates under ¡ì 430(h)(2) of the Internal Revenue Code. In addition, this notice provides guidance as to the interest rate on 30-year Treasury securities under ¡ì 417(e)(3)(A)(ii)(II) as in effect for plan years beginning before 2008 and the 30-year Treasury weighted average rate under ¡ì 431(c)(6)(E)(ii)(I).

Generally, except for certain plans under section 104 of the Pension Protection Act of 2006 and CSEC plans under ¡ì 414(y), ¡ì 430 of the Code specifies the minimum funding requirements that apply to single-employer plans pursuant to ¡ì 412. Section 430(h)(2) specifies the interest rates that must be used to determine a plan¡¯s target normal cost and funding target. Under this provision, present value is generally determined using three 24-month average interest rates (¡°segment rates¡±), each of which applies to cash flows during specified periods. To the extent provided under ¡ì 430(h)(2)(C)(iv), these segment rates are adjusted by the applicable percentage of the 25-year average segment rates for the period ending September 30 of the year preceding the calendar year in which the plan year begins.^[3] However, an election may be made under ¡ì 430(h)(2)(D)(ii) to use the monthly yield curve in place of the segment rates.

Notice 2007¨C81, 2007¨C44 I.R.B. 899, provides guidelines for determining the monthly corporate bond yield curve, and the 24-month average corporate bond segment rates used to compute the target normal cost and the funding target. Consistent with the methodology specified in Notice 2007¨C81, the monthly corporate bond yield curve derived from November 2017 data is in Table 2017¨C11 at the end of this notice. The spot first, second, and third segment rates for the month of November 2017 are, respectively, 2.20, 3.57, and 4.24.

The 24-month average segment rates determined under ¡ì 430(h)(2)(C)(i) through (iii) must be adjusted pursuant to ¡ì 430(h)(2)(C)(iv) to be within the applicable minimum and maximum percentages of the corresponding 25-year average segment rates. For plan years beginning before 2021, the applicable minimum percentage is 90% and the applicable maximum percentage is 110%. The 25-year average segment rates for plan years beginning in 2016, 2017, and 2018 were published in Notice 2015¨C61, 2015¨C39 I.R.B. 408, Notice 2016¨C54, 2016¨C40 I.R.B. 429, and Notice 2017¨C50, 2017¨C41 I.R.B. 280, respectively.

The three 24-month average corporate bond segment rates applicable for December 2017 without adjustment for the 25-year average segment rate limits are as follows:

Based on ¡ì 430(h)(2)(C)(iv), the 24-month averages applicable for December 2017, adjusted to be within the applicable minimum and maximum percentages of the corresponding 25-year average segment rates, are as follows:

Generally for plan years beginning after 2007, ¡ì 431 specifies the minimum funding requirements that apply to multiemployer plans pursuant to ¡ì 412. Section 431(c)(6)(B) specifies a minimum amount for the full-funding limitation described in ¡ì 431(c)(6)(A), based on the plan¡¯s current liability. Section 431(c)(6)(E)(ii)(I) provides that the interest rate used to calculate current liability for this purpose must be no more than 5 percent above and no more than 10 percent below the weighted average of the rates of interest on 30-year Treasury securities during the four-year period ending on the last day before the beginning of the plan year. Notice 88¨C73, 1988¨C2 C.B. 383, provides guidelines for determining the weighted average interest rate. The rate of interest on 30-year Treasury securities for November 2017 is 2.80 percent. The Service determined this rate as the average of the daily determinations of yield on the 30-year Treasury bond maturing in August 2047 determined each day through November 8, 2017 and the yield on the 30-year Treasury bond maturing in November 2047 determined each day for the balance of the month. For plan years beginning in December 2017, the weighted average of the rates of interest on 30-year Treasury securities and the permissible range of rates used to calculate current liability are as follows:

In general, the applicable interest rates under ¡ì 417(e)(3)(D) are segment rates computed without regard to a 24-month average. Notice 2007¨C81 provides guidelines for determining the minimum present value segment rates. Pursuant to that notice, the minimum present value segment rates determined for November 2017 are as follows:

2017 are as follows:

The principal author of this notice is Tom Morgan of the Office of the Associate Chief Counsel (Tax Exempt and Government Entities). However, other personnel from the IRS participated in the development of this guidance. For further information regarding this notice, contact Mr. Morgan at 202-317-6700 or Tony Montanaro at 202-317-8698 (not toll-free calls).