- Pennsylvania Corporation Tax Bulletin 2026-01 provides new guidance for applying Section 163(j) to Pennsylvania CNIT filings for tax years beginning on or after January 1, 2025.
- For 2025 and later Pennsylvania CNIT filings, taxpayers might need Pennsylvania-specific Section 163(j) calculations using the federal rules in effect on December 31, 2024, which could differ from the federal consolidated return.
- The guidance shifts the analysis toward separate-company calculations and could require additional workpapers, carryforward tracking, partnership information, Section 382 documentation, and return attachments.
Pennsylvania has released guidance to establish a new compliance framework for tax years beginning on or after January 1, 2025. As a result, corporate taxpayers might need Pennsylvania-specific Section 163(j) workpapers even when the federal consolidated group does not report a current-year business interest expense limitation.
Summary
- Pennsylvania Corporation Tax Bulletin (CTB) 2026-01 applies to tax years beginning on or after January 1, 2025, and provides guidance for applying Internal Revenue Code Section 163(j) for Pennsylvania corporation net income tax (CNIT) purposes under Pennsylvania’s fixed conformity date.
- For post-2024 tax years, Pennsylvania applies IRC Section 163(j) as in effect on December 31, 2024, which means the Pennsylvania calculation could differ from the federal return if federal law changes after that date.
- The new guidance omits the prior federal consolidated-group threshold approach reflected in CTB 2019-03. As a result, Pennsylvania corporate taxpayers should be prepared to compute the limitation on a separate-company basis.
Why This Matters
Many Pennsylvania corporate taxpayers historically evaluated Section 163(j) by first looking to whether the federal consolidated group reported a limitation. CTB 2026-01 signals a different post-2024 approach: Each Pennsylvania taxpayer might need to apply the limitation under separate-company concepts using the version of Section 163(j) in effect on December 31, 2024. That could create Pennsylvania-only limitations, carryforwards, and related-party interest addback tracking that are not apparent from the federal return alone.
Key Changes From Prior Guidance
| Topic | CTB 2019-03 | CTB 2026-01 | Significance |
| Fixed conformity date | Generally follows the federal Section 163(j) rules applicable to the relevant year, absent Pennsylvania decoupling legislation. | Uses Section 163(j) as in effect on December 31, 2024, before passage of the One Big Beautiful Bill Act. | The Pennsylvania calculation could diverge from the filed federal return for 2025 and later years. |
| Separate-company calculation | Generally requires a separate-company Pennsylvania limitation only when the federal consolidated group reports a current-year Section 163(j) limitation. | Omits the federal consolidated group threshold. Each Pennsylvania taxpayer must perform its own separate-company calculation, including intercompany and third-party interest. | Pennsylvania-only limitations and carryforwards could arise even when the federal consolidated group reports no current-year limitation. |
| Carryforward release policy | Generally allows the release of prior Pennsylvania carryforwards when the federal consolidated group has no current-year limitation, subject to exceptions. | Omits the prior consolidated group carryforward-release policy. | Taxpayers should reassess the availability, use, and tracking of Pennsylvania-specific interest carryforwards. |
| Partnership reporting | Does not expressly require a Pennsylvania-specific supplement to the federal Schedule K-1, although partnership-by-partnership calculation and tracking apply. | Expects Pennsylvania conformity information as a Schedule K-1 supplement and makes the corporate partner responsible for any necessary recalculation if the information is not provided. | CTB 2026-01 creates a more explicit information and compliance responsibility for corporate partners. |
| Section 382 | Mentions Section 382 as a possible exception to the consolidated group carryforward-release policy and refers to CTB 2008-03. | Adds a dedicated section requiring analysis of the additional limitation, use of the applicable Form RCT-101 indicator, and an attached statement detailing the Section 382 limitations. | CTB 2026-01 adds specific Pennsylvania reporting and documentation instructions. |
Potential Taxpayer Positions
CTB 2026-01 reflects the Pennsylvania Department of Revenue’s current administrative position regarding the application of IRC Section 163(j) for Pennsylvania CNIT purposes. Some practitioners have identified potential alternative filing positions, including arguments regarding Pennsylvania’s authority to apply Section 163(j) in determining taxable income, or its method used to calculate the limitation. Taxpayers evaluating any alternative position should analyze the relevant statutory, constitutional, and procedural considerations based on their specific facts and circumstances and consult with their tax advisors regarding associated filing, disclosure, and controversy implications.
Taxpayers seeking alternative apportionment can request relief by checking the applicable box on their returns and attaching a statement. We generally recommend supporting that request with a comprehensive package that explains why the proposed method more fairly represents the taxpayer’s Pennsylvania activity, is consistent with prior reporting positions, and aligns with the relief requested. A well-supported approach can improve the likelihood of approval and reduce audit risk.
Taken together, CTB 2026-01 shifts the Pennsylvania IRC Section 163(j) analysis from a federal-return-dependent exercise to a Pennsylvania-specific compliance calculation that could require separate modeling, documentation, and return support.
Key Takeaway: Taxpayers should not treat CTB 2026-01 as a routine update to CTB 2019-03. CTB 2026-01 establishes a distinct post-2024 regime for Pennsylvania CNIT purposes. The key practical issue is that taxpayers might need to model IRC Section 163(j) on a separate-company basis using fixed 2024 federal rules, which can produce Pennsylvania results that differ from both the federal consolidated return and prior Pennsylvania practice. Companies should identify affected entities early, update compliance workpapers, and evaluate whether return positions, disclosures, and provision calculations should be revisited.