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Third Quarter 2025 IRS Interest Rates on Overpayment & Underpayment of Tax

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On May 12, 2025, the IRS announced that the Third Quarter 2025 IRS interest rates on overpayment and underpayment of tax will remain the same as in the Second Quarter of 2025.

This means that the Third Quarter 2025 IRS interest rates will be as follows:

seven (7) percent for overpayments (seven (7) percent in the case of a corporation);

seven (7) percent for underpayments;

nine (9) percent for large corporate underpayments; and

four and a half (4.5) percent for the portion of corporate overpayment exceeding $10,000.

How the IRS Calculated Third Quarter 2025 IRS Interest Rates

The IRS calculates the IRS interest rates based on specific tax provisions. We begin with the Internal Revenue Code (“IRC”) §6621, which establishes the IRS interest rates on overpayments and underpayments of tax. Under §6621(a)(1), the overpayment rate is the sum of the federal short-term rate plus 3 percentage points for individuals and 2 percentage points in cases of a corporation. There is an exception to this rule: with respect to a corporate overpayment of tax exceeding $10,000 for a taxable period of time, the rate is the sum of the federal short-term rate plus one-half of a percentage point.

Additionally, under §6621(a)(2), the underpayment rate is the sum of the federal short-term rate plus 3 percentage points. Similarly to overpayments, there is an exception for a large corporate underpayment: in such cases, §6621(c) requires the underpayment rate to be the sum of the relevant federal short-term rate plus 5 percentage points. Also, the readers should see §6621(c) and §301.6621-3 of the Regulations on Procedure and Administration for the definition of a large corporate underpayment and for the rules for determining the applicable date.

Finally, pursuant to the IRC §6621(b)(1), the IRS computed the Third Quarter 2025 IRS interest rates based on federal short-term rates in April of 2025.

Importance of the Third Quarter 2025 IRS Interest Rates

The IRS interest rates are relevant for a great variety of purposes. Let’s highlight three of its most important uses. Firstly, these rates will determine the interest a taxpayer will get on any IRS refunds.

Second, the IRS and the taxpayers use these rates to calculate the interest on any additional US tax liability on amended or audited tax returns. This also applies to the amended (and, in case of SFOP, original) tax returns that the taxpayers submit pursuant to Streamlined Domestic Offshore Procedures and Streamlined Foreign Offshore Procedures.

Finally, the Third Quarter 2025 IRS interest rates will be used to calculate PFIC interest on any relevant §1291 PFIC tax. This PFIC interest will be reported on the relevant Form 8621 and ultimately Form 1040.

We at Sherayzen Law Office constantly deal with the IRS interest rates on overpayments and underpayments of tax. This is why we closely follow any changes in these IRS interest rates, including the Third Quarter 2025 IRS interest rates.

2025 IRS Standard Mileage Rates | IRS Tax Lawyer & Attorney

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On December 19, 2024, the IRS updated the optional standard mileage for the calculation of deductible costs of operating an automobile (sedans, vans, pickups and panel trucks) for business, charitable, medical or moving purposes. Let’s discuss in more detail these new 2025 IRS Standard Mileage Rates.

2025 IRS Standard Mileage Rates for Business Usage

For the tax year 2025, the business-use cost of operating a vehicle will be 70 cents per mile. This is 3 cents higher than in 2024. The standard mileage rate for business use is based on an annual study of the fixed and variable costs of operating an automobile.

As in previous years, a taxpayer may not use the business standard mileage rate for a vehicle after using any depreciation method under the Modified Accelerated Cost Recovery System (MACRS) or after claiming a Section 179 deduction for that vehicle.

2025 IRS Standard Mileage Rates for Medical and Moving Purposes

For the tax year 2025, the medical and moving cost of operating a vehicle will be 21 cents per mile. This is the same as in 2024. The rate for medical and moving purposes is based on the variable costs.

2025 IRS Standard Mileage Rates for Charitable Purposes

For the tax year 2025, the costs of operating a vehicle in the service of charitable organizations will be 14 cents per mile. This is also the same as in 2024. The statute sets charitable rate which remains unchanged.

2025 IRS Standard Mileage Rates vs. Actual Costs vs. Miscellaneous Itemized Deductions

It is important to note that under the Tax Cuts and Jobs Act, taxpayers can no longer claim a miscellaneous itemized deduction for unreimbursed employee travel expenses. With the exception of active duty members of Armed Forces, taxpayers also cannot claim a deduction for moving expenses. Notice-2019-02.

However, taxpayers are not forced to use the standard mileage rates; rather, this is optional. Sherayzen Law Office advises taxpayers that they have the option of calculating the actual costs of using a vehicle rather than using the standard mileage rates. If the actual-cost method is chosen, then all of the actual expenses associated with the business use of a vehicle can be used: lease payments, maintenance and repairs, tires, gasoline (including all taxes), oil, insurance, et cetera.

IRS Notice 2025-05

IRS Notice 2025-05, posted on IRS.gov, contains the standard mileage rates, the amount a taxpayer must use in calculating reductions to basis for depreciation taken under the business standard mileage rate, and the maximum standard automobile cost that a taxpayer may use in computing the allowance under a fixed and variable rate plan. In addition, for employer-provided vehicles, the Notice provides the maximum fair market value of automobiles first made available to employees for personal use in calendar year 2025 for which employers may use the fleet-average valuation rule in § 1.61-21(d)(5)(v) or the vehicle cents-per-mile valuation rule in § 1.61-21(e).

Fourth Quarter 2024 IRS Interest Rates on Overpayment & Underpayment of Tax

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On August 21, 2024, the IRS announced that the Fourth Quarter 2024 IRS interest rates on overpayment and underpayment of tax will remain the same as in the Third Quarter of 2024.

This means that, the Fourth Quarter 2024 IRS interest rates will be as follows:

eight (8) percent for overpayments (seven (7) percent in the case of a corporation);

eight (8) percent for underpayments;

ten (10) percent for large corporate underpayments; and

five and a half (5.5) of a percent for the portion of a corporate overpayment exceeding $10,000.

How Are the IRS interest Rates Calculated?

Internal Revenue Code (“IRC”) §6621 establishes the IRS interest rates on overpayments and underpayments of tax. Let’s deal with the overpayment rates first. Under §6621(a)(1), the overpayment rate is the sum of the federal short-term rate plus 3 percentage points for individuals and 2 percentage points in cases of a corporation. There is an exception to this rule: with respect to a corporate overpayment of tax exceeding $10,000 for a taxable period of time, the rate is the sum of the federal short-term rate plus one-half of a percentage point.

Furthermore, under §6621(a)(2), the underpayment rate is the sum of the federal short-term rate plus 3 percentage points. Again, there is an exception for a large corporate underpayment: in such cases, §6621(c) requires the underpayment rate to be the sum of the relevant federal short-term rate plus 5 percentage points. Additionally, the readers should see §6621(c) and §301.6621-3 of the Regulations on Procedure and Administration for the definition of a large corporate underpayment and for the rules for determining the applicable date.

Pursuant to the IRC §6621(b)(1), the Fourth Quarter 2024 IRS interest rates were computed based on federal short-term rates in January of 2024. 

Why Are the IRS interest Rates Important?

It is important to note that the Fourth Quarter 2024 IRS interest rates are relevant for a great variety of purposes. Let’s highlight three of its most important uses. First, these rates will determine the interest a taxpayer will get on any IRS refunds.

Second, the rates will also be used to establish the interest to be added to any additional US tax liability on amended or audited tax returns. This also applies to the tax returns that were amended pursuant to Streamlined Domestic Offshore Procedures and Streamlined Foreign Offshore Procedures.

Finally, the Fourth Quarter 2024 IRS interest rates will be used to calculate PFIC interest on any relevant §1291 PFIC tax. This PFIC interest will be reported on the relevant Form 8621 and ultimately Form 1040.

Given the importance of the IRS interest rates, we at Sherayzen Law Office constantly deal with the IRS interest rates on overpayments and underpayments of tax. This is why we closely follow any changes in these IRS interest rates, including the Fourth Quarter 2024 IRS interest rates.

2022 Fourth Quarter IRS Interest Rates (Underpayment & Overpayment)

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On August 15, 2022, the IRS announced that the 2022 Fourth Quarter IRS interest rates will again increase for both underpayment and overpayment cases. This increase closely follows the Federal Reserve’s recent increases in interest rates.

This means that, the 2022 Fourth Quarter IRS interest rates will be as follows:

Six (6) percent for overpayments (five (5) percent in the case of a corporation);
Six (6) percent for underpayments;
eight (8) percent for large corporate underpayments; and
three and one-half (3.5) percent for the portion of a corporate overpayment exceeding $10,000.

Under the Internal Revenue Code, the interest rates are determined on a quarterly basis. This means that the next change in the IRS underpayment and overpayment interest rates may occur only for the 1st Quarter of 2023.

The the 2022 Fourth Quarter IRS interest rates are important for many reasons. These are the rates that the IRS uses to determine how much interest a taxpayer needs to pay on an additional tax liability that arose as a result of an IRS audit or an amendment of his US tax return. The IRS also utilizes these rates with respect to the calculation of PFIC interest on Section 1291 tax.

As an international tax law firm, Sherayzen Law Office keeps track of the IRS underpayment interest rates on a regular basis. We often amend our client’s tax returns as part of an offshore voluntary disclosure process. For example, both Streamlined Domestic Offshore Procedures and Streamlined Foreign Offshore Procedures require that a taxpayer amends his prior US tax returns, determines the additional tax liability and calculates the interest on this liability.

Moreover, we very often have to do PFIC calculations for our clients under the default IRC Section 1291 methodology. This calculation requires the usage of the IRS underpayment interest rates in order to determine the amount of PFIC interest on the IRC Section 1291 tax.

Finally, it is important to point out that the IRS will use the 2022 Fourth Quarter IRS interest rates to determine the amount of interest that needs to be paid to a taxpayer who is due a tax refund as a result of an IRS audit or amendment of the taxpayer’s US tax return. Surprisingly, we sometimes see this scenario arise in the context of offshore voluntary disclosures.

Sherayzen Law Office continues to track any changes the IRS makes to its overpayment and underpayment interest rates.

May 2018 IRS Compliance Campaigns | International Tax Lawyer & Attorney

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On May 21, 2018, the IRS announced the creation of another six compliance campaigns. Let’s explore these May 2018 IRS Compliance Campaigns in more detail.

May 2018 IRS Compliance Campaigns: Background Information

After a long period of planning, the IRS Large Business and International division (“LB&I”) finalized its new restructuring plan in 2017. Under the new plan, LB&I decided to switch to issue-based examinations and IRS campaigns.

The idea behind the IRS compliance campaigns is to concentrate the LB&I limited resources where they are most needed – i.e. where there is the highest risk of noncompliance. The first campaigns were announced by the IRS on January 31, 2017. Then, the IRS introduced additional campaigns in November of 2017 and March of 2018. As of March 13, 2018, there were a total of twenty-nine campaigns outstanding.

Six New May 2018 IRS Compliance Campaigns

On May 21, 2018, the LB&I introduced the following new campaigns: Interest Capitalization for Self-Constructed Assets; Forms 3520/3520-A Non-Compliance and Campus Assessed Penalties; Forms 1042/1042-S Compliance; Nonresident Alien Tax Treaty Exemptions; Nonresident Alien Schedule A and Other Deductions; and NRA Tax Credits. Each of these campaigns was selected by the IRS through the analysis of the LB&I data as well as from suggestions made by IRS employees.

It is also important to point out that each of these campaigns as well as the twenty-nine previous campaigns were reviewed by the IRS in light of the 2017 Tax Reform (which was enacted on December 22, 2017).

May 2018 IRS Compliance Campaigns: Interest Capitalization for Self-Constructed Assets

The first campaign focused on the Internal Revenue Code (“IRC”) Section 263A. Under this provision if a taxpayer engaged in certain production activities with respect to “designated property”, he is required to capitalize the interest that he incurs or pays during the production period with respect to this property.

IRC Section 263A(f) defined “designated property” as: (a) any real property, or (b) tangible personal property that has: (i) a long useful life (depreciable class life of 20 years or more), or (ii) an estimated production period exceeding two years, or (iii) an estimated production period exceeding one year and an estimated cost exceeding $1,000,000.

The IRS created this campaign with the goal of ensuring taxpayer compliance by verifying that interest is properly capitalized for designated property and the computation to capitalize that interest is accurate. Construction companies are likely to be the most immediate target of this campaign. Given the fact that Section 263A is not well-known, the IRS adopted varous treatment streams for this campaign, including issue-based examinations, education soft letters, and educating taxpayers and practitioners to encourage voluntary compliance.

May 2018 IRS Compliance Campaigns: Form 3520/3520-A Non-Compliance and Campus Assessed Penalties

This campaign reflects the increasing attention of the IRS to foreign trusts. This is a highly complex area of law. In order to deal with this complexity, the IRS stated that it will adopt a multifaceted approach to improving Form 3520 and Form 3520-A compliance. The treatment streams will include (but not limited to) examinations and penalties assessed by the campus when the forms are received late or are incomplete. The IRS will also use Letter 6076 to inform the trusts about their potential Form 3520-A obligations.

May 2018 IRS Compliance Campaigns: Form 1042/1042-S Compliance

Taxpayers who make payments of certain US-source income to foreign persons must comply with the related withholding, deposit and reporting requirements. This campaign targets Withholding Agents who make such payments but do not meet all of their compliance duties. The IRS will address noncompliance and errors through a variety of treatment streams, including examination.

May 2018 IRS Compliance Campaigns: Nonresident Alien Tax Treaty Exemptions

This campaign is intended to increase compliance in nonresident alien (NRA) individual tax treaty exemption claims related to both effectively connected income and Fixed, Determinable, Annual Periodical (“FDAP”) income. Some NRA taxpayers may either misunderstand or misinterpret applicable treaty articles, provide incorrect or incomplete forms to the withholding agents or rely on incorrect information returns provided by US payors to improperly claim treaty benefits and exempt US-source income from taxation. This campaign will address noncompliance through a variety of treatment streams including outreach/education and traditional examinations.

May 2018 IRS Compliance Campaigns: Nonresident Alien Schedule A and Other Deductions

This is another campaign that targets NRAs. In this case, the IRS focuses on the Form 1040NR Schedule A itemized deductions. NRA taxpayers may either misunderstand or misinterpret the rules for allowable deductions under the previous and new IRC provisions, do not meet all the qualifications for claiming the deduction and/or do not maintain proper records to substantiate the expenses claimed. The campaign will address noncompliance through a variety of treatment streams including outreach/education and traditional examinations.

May 2018 IRS Compliance Campaigns: NRA Tax Credits

This is yet another (third) campaign that targets NRAs; this time it concerns tax credits claimed by the NRAs. The IRS here targets NRAs who erroneously claim a dependent tax credit and who either have no qualifying earned income, do not provide substantiation/proper documentation, or do not have qualifying dependents. Furthermore, the IRS also wants to target NRAs who claim education credits (which are only available to U.S. persons) by improperly filing Form 1040 tax returns. This campaign will address noncompliance through a variety of treatment streams including outreach/education and traditional examinations.

Contact Sherayzen Law Office for Professional Tax Help

If you have been contacted by the IRS as part of any of its campaigns, please contact Sherayzen Law Office for professional help. We have helped hundreds of US taxpayers around the world with their US tax compliance issues, and we can help you!

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