India: Practical Tax‑planning Checklist Under the Income‑tax Act, 2025, What Businesses Must Do in 2026

The Income‑tax Act, 2025, India’s first ground‑up rewrite of direct‑tax legislation since 1961, took effect on 1 April 2026, accompanied by the new Income‑tax Rules, 2026. For every CFO, Head of Tax and General Counsel operating in or through India, the transition demands far more than a reading exercise: payroll codes need reconfiguring, vendor contracts require updated withholding clauses, MAT computations must be re‑modelled, and reporting calendars have shifted. This article delivers a practitioner‑focused, step‑by‑step compliance checklist for income tax act tax planning India, prioritised by urgency, mapped to entity type, and structured so that in‑house teams can begin execution immediately.

Every statutory reference below traces to the official Act text published on the Income Tax Department portal and the ITD’s FAQs on Interplay and Transition.

Executive Summary: What Changed and Why It Matters for Income Tax Act Tax Planning India

The Income‑tax Act, 2025 consolidates and simplifies the 1961 statute, but simplification does not mean inaction. Below are the seven headline changes that affect corporate tax planning India‑wide, effective 1 April 2026:

• Tax Year replaces Assessment Year. Income earned in a financial year is now assessed in the same “Tax Year,” collapsing the two‑year framework that governed filing, advance‑tax instalments and refund timelines since 1961.
• TDS/TCS section re‑numbering and table consolidation. Every withholding section from the old Act has been mapped to new section numbers under the 2025 Act; payroll software, ERP tax modules and vendor PAN validation workflows must be updated before the first payment cycle of April 2026.
• MAT treated as final tax at 15 per cent (effective rate approximately 14 per cent after surcharge adjustments for eligible categories). Companies previously carried forward MAT credit; the new treatment eliminates future credit utilisation for the relevant category of taxpayers and requires immediate provisioning changes.
• Capital gains computation overhaul. The Act rationalises holding‑period classifications and modifies indexation treatment, impacting M&A deal structuring, share buy‑backs and real‑estate transactions closed on or after 1 April 2026.
• Revised ITR forms and AIS/Form 26AS fields. The Income‑tax Rules, 2026 introduce amended return forms with new disclosure schedules, tighter reconciliation requirements and expanded annual information statement (AIS) data feeds.
• Faceless assessment and appeal path refinements. Procedural timelines for objections and appeals have been reset under the new Act; documentation preservation protocols must be updated.
• Cross‑border sourcing, PE and transfer‑pricing adjustments. The Act clarifies sourcing rules, refines the permanent establishment definition in certain contexts and aligns transfer‑pricing documentation with OECD BEPS Action 13 standards more explicitly.

Immediate top 5 actions: (1) Update all TDS/TCS codes in payroll and vendor‑payment systems; (2) Issue vendor notifications with new withholding references; (3) Reconcile Form 26AS/AIS for FY 2025‑26 before filing under new timelines; (4) Re‑model MAT/final‑tax impact on FY 2026‑27 provisions; (5) Appoint an internal transition owner accountable for the 90‑day playbook below.

Key Definitions and Conceptual Shifts Businesses Must Understand

Tax Year vs Assessment Year, Mapped Examples

Under the Income‑tax Act, 1961, a company earning income between 1 April 2025 and 31 March 2026 filed its return for “Assessment Year 2026‑27.” The Income‑tax Act, 2025 abolishes this staggered terminology. Income earned from 1 April 2026 onward is assessed in the same Tax Year 2026‑27. The practical consequence is that advance‑tax instalment dates, TDS deposit deadlines and return‑filing due dates now reference a single year label, reducing the scope for confusion in system‑generated challans and demand notices. However, transitional provisions preserve the old AY references for proceedings already initiated before 1 April 2026, as clarified by the ITD’s FAQs on Interplay and Transition.

Example 1, Domestic company: A private limited company’s Q1 advance‑tax instalment (due 15 June 2026) is now tagged to Tax Year 2026‑27 rather than AY 2027‑28. ERP challan templates must reflect this change or risk mismatched credits on Form 26AS.

Example 2, Foreign parent with Indian subsidiary: A UK parent remitting royalties to its Indian subsidiary must apply the withholding rate referenced under the 2025 Act section (not the old Section 195 of the 1961 Act) for payments made on or after 1 April 2026, while also verifying the applicable DTAA rate.

Residence, Source and Permanent Establishment

The 2025 Act retains the 60‑day / 182‑day residence tests but consolidates scattered provisions into a single chapter, reducing interpretive disputes. Source‑of‑income rules now explicitly address digital advertising revenue and cloud‑service fees, an area previously governed solely by CBDT circulars. Multinational groups with Indian operations should map each revenue stream against the updated sourcing chapter to confirm whether withholding obligations have expanded or narrowed under the new text.

Immediate Action Plan, Day 0 to Day 90 (Prioritised Compliance Checklist for Businesses)

The transition window is narrow. Below is a phased playbook that tax teams can adopt from 1 April 2026 onward. Each action is tagged with a suggested owner and a hard deadline to ensure nothing falls through the cracks.

Day 0–7: Emergency Configuration

1. Update TDS/TCS section codes in payroll software, ERP tax modules and bank challan templates to reflect Act 2025 section numbers. The ITD’s mapping table (published in the FAQs on Interplay and Transition) provides the old‑to‑new cross‑reference. Owner: IT / Tax team. Deadline: before first salary run.
2. Issue vendor notifications. Send a standardised email to all active vendors and contractors informing them of the new withholding‑section references and requesting updated PAN/TAN details where applicable. (A sample template is provided below in the TDS section.)
3. Freeze lower/nil withholding certificates. Existing certificates issued under Section 197 of the 1961 Act expire on 31 March 2026. Fresh applications under the corresponding 2025 Act provision must be filed immediately for vendors expecting reduced withholding in April.

Day 8–30: Reconciliation and Training

1. Reconcile Form 26AS and AIS for FY 2025‑26 (old regime) to ensure all credits are captured before the first return under the new Act is prepared.
2. Conduct internal training workshops for finance, legal and procurement teams covering the Tax Year terminology switch, updated ITR schedules and revised withholding obligations.
3. Review contracts with withholding clauses. Any agreement referencing old Act sections (e.g., “tax deducted under Section 194C”) should be amended or annotated to reference the equivalent 2025 Act section.
4. Appoint a transition owner, a single accountable person (typically the Head of Tax or CFO) who owns the 90‑day checklist and reports progress weekly to the board or audit committee.

Day 31–90: Strategic Modelling and Filing Readiness

1. Model MAT / final‑tax impact on FY 2026‑27 projected earnings. Quantify the cashflow effect of losing MAT credit carry‑forwards and adjust quarterly advance‑tax instalments accordingly.
2. Update transfer‑pricing documentation. Ensure the master file, local file and Country‑by‑Country Report templates reference Act 2025 provisions and align with the updated Rules, 2026 thresholds.
3. Test ITR filing in sandbox. Once the ITD releases updated utility software, run a test filing using sample data to confirm field mapping, schedule completeness and digital‑signature workflows.
4. Document preservation protocol. Circulate a litigation‑readiness memo to all business units specifying the data‑retention periods under the Rules, 2026 and the documentation that must be preserved for faceless assessments.

TDS/TCS Changes 2026: Payroll, Vendors, Certificates and Reconciliations

The TDS changes 2026 represent the single largest operational burden of the transition. Every withholding section from the 1961 Act has been re‑numbered under the Income‑tax Act, 2025, and several categories have been merged or split. Failure to update challan codes by the first payment cycle of April 2026 will result in mismatched credits on Form 26AS, triggering demand notices and interest under the new Act’s penalty provisions.

Updated Section Numbers and Table Mappings

The ITD’s FAQs on Interplay and Transition provide a comprehensive old‑to‑new mapping table. Below are the most commonly encountered withholding categories for businesses:

Payroll and Vendor Payment Examples

Salaries: An employee earning ₹18 lakh per annum under the new tax regime will have TDS computed under the 2025 Act slab rates (which broadly mirror the rates announced in the Union Budget 2026‑27). The payroll system must reference Tax Year 2026‑27 on every pay‑slip and Form 16, not AY 2027‑28.

Vendor payments: A company paying ₹50 lakh annually to a facilities‑management contractor must apply the new Act section (replacing old Section 194C) on each invoice processed from 1 April 2026. If the vendor holds a lower‑withholding certificate issued under the 1961 Act, that certificate is no longer valid; a fresh certificate under the 2025 Act must be obtained.

Certificates, Compliance and Audit Trails

Lower and nil withholding certificates must now be applied for under the 2025 Act’s corresponding provision. Businesses should maintain a register of all certificates received, their validity periods and the payments against which they have been applied. During faceless assessments, the Assessing Officer may request this register electronically; pre‑populating a digital audit trail will reduce response times and penalty exposure.

Vendor notification template (suggested wording): “Dear [Vendor], with effect from 1 April 2026, all TDS deductions on payments to your firm will reference section numbers under the Income‑tax Act, 2025 (replacing references to the Income‑tax Act, 1961). Please furnish your updated PAN, confirm your TDS rate expectation and, if applicable, provide a fresh lower/nil withholding certificate under the 2025 Act. For queries, contact [Tax Team email].”

Corporate Tax Planning India: MAT as Final Tax at 14 Per Cent, Modelling and Choices

One of the most consequential changes for corporate tax planning India‑wide is the treatment of Minimum Alternate Tax (MAT) as a final tax. Under the 1961 Act, companies paying MAT could carry forward the credit for set‑off against regular tax liability in subsequent years (up to 15 years). The Income‑tax Act, 2025 eliminates this carry‑forward mechanism for the relevant category of taxpayers, treating the MAT paid (at an effective rate of approximately 14 per cent after applicable surcharge adjustments) as the final tax for the year.

Example Calculation

Consider a domestic company with book profits of ₹100 crore and a regular tax liability (under the 22 per cent concessional regime) of ₹12 crore. Under the 1961 Act, the company would have paid MAT of approximately ₹15 crore and carried forward ₹3 crore as MAT credit. Under the 2025 Act, the ₹15 crore is final, no credit is generated. If the company’s regular tax liability rises in Year 2, the ₹3 crore that would have been set off is permanently lost. CFOs must re‑model multi‑year cashflow projections accordingly.

Planning Options and Election Windows

Industry observers expect three practical responses to emerge. First, companies already on the concessional 22 per cent regime may reassess whether opting out (if permitted under the Act’s transitional provisions) yields a better after‑tax outcome. Second, loss‑making companies that relied on MAT credit accumulation to smooth future tax outflows will need to build the permanent cash‑cost into their budgets immediately. Third, groups undertaking restructurings, mergers, demergers or slump sales, should model whether completing the transaction before or after the MAT credit cut‑off date affects total group tax cost. For M&A‑related tax implications, the interaction with the IBC Amendment Act, 2026 and CCI merger‑control reforms should be considered concurrently.

Cross‑Border Tax Planning India: Transfer Pricing and DTAA Considerations

For multinational enterprises, cross‑border tax planning India is shaped by three sets of changes under the 2025 Act: updated sourcing rules, refined PE definitions and tighter transfer‑pricing documentation standards.

Permanent Establishment and Sourcing

The Act clarifies that certain digital‑service arrangements, including cloud computing, SaaS subscriptions and remote technical support, may trigger a taxable presence in India even where no physical office exists, depending on the revenue thresholds and user‑base metrics prescribed in the Rules, 2026. Companies operating cross‑border joint ventures in India should audit existing inter‑company service agreements to determine whether new sourcing rules create an Indian tax liability where none existed before.

Withholding on Outbound Payments

Payments to non‑residents (royalties, fees for technical services, interest) must now be deducted under the 2025 Act’s consolidated withholding chapter. The applicable rate is the lower of the domestic rate prescribed under the Act or the rate specified in the relevant DTAA, but the procedural requirements for claiming treaty benefits (Tax Residency Certificate, Form 10F equivalent under Rules, 2026) have been tightened. Late or incorrect filings attract higher penalty rates than under the 1961 Act.

TP Documentation Updates and Master File

The Rules, 2026 mandate that transfer‑pricing documentation, master file, local file and CbCR, explicitly reference Act 2025 section numbers and align with the OECD’s updated 2024 guidance on financial transactions. Groups should update documentation templates by Day 75 of the transition playbook.

Red flags checklist for cross‑border contracts:

• Does the contract reference old Act section numbers for withholding? If yes, amend immediately.
• Has the vendor or service provider furnished a valid Tax Residency Certificate for Tax Year 2026‑27?
• Does the inter‑company pricing benchmark study cover the period beginning 1 April 2026?
• Are digital‑service fees routed through a structure that may now trigger a deemed PE under the 2025 Act?

Capital Gains Rules 2026: Transactional Checklist for Sales, M&A and Reorganisations

The 2025 Act rationalises capital gains computation by streamlining holding‑period classifications and modifying cost‑indexation treatment. Transactions closed on or after 1 April 2026 are governed entirely by the new rules.

Holding Periods and Indexation

The Act consolidates the previous multi‑tier holding‑period framework (12 months for listed equity, 24 months for unlisted shares, 36 months for immovable property under certain conditions) into a simplified two‑tier structure. Indexation benefits, which previously applied to long‑term capital gains on most asset classes, have been modified, early indications suggest the benefit is curtailed or replaced by a concessional flat rate for certain categories. Tax teams should verify the applicable rule for each asset class against the Rules, 2026 before processing any disposal.

Reporting, ITR Form Changes, Recordkeeping and Audit Readiness

The Income‑tax Rules, 2026 overhaul ITR forms to align with the Act’s simplified chapter structure. Material changes include new disclosure schedules for crypto‑asset income, expanded related‑party transaction reporting fields and a mandatory reconciliation schedule linking AIS data with reported income.

IT and Data Checklist for Finance/ERP Teams

• ITR utility software: Download and test the updated ITR filing utility as soon as the ITD releases it; do not assume backward compatibility with the 2024‑25 version.
• AIS / Form 26AS reconciliation: Run a full reconciliation of AIS data against books of account for FY 2025‑26 (old regime) and establish a quarterly reconciliation cadence for Tax Year 2026‑27.
• Data retention: The Rules, 2026 prescribe minimum retention periods for digital records, invoices and supporting documentation. Confirm that your document‑management system and backup protocols meet these requirements.
• Faceless assessment readiness: Ensure all financial records, transfer‑pricing reports and board resolutions can be transmitted electronically in the formats specified by the ITD (PDF/A, XML or JSON as applicable).
• Digital signature certificates: Verify that DSCs for authorised signatories are valid and linked to the updated ITD portal for Tax Year 2026‑27 filings.

Dispute Mitigation and Litigation Risk Notes for In‑House Counsel

The shift to the 2025 Act resets certain procedural clocks. In‑house counsel should pay particular attention to the revised timelines for responding to faceless assessment notices, filing objections before the Dispute Resolution Panel (DRP) and appealing to the Commissioner of Income Tax (Appeals).

Preservation checklist: Retain, in electronic format, all advance‑tax challans, TDS certificates (Form 16/16A), transfer‑pricing benchmarking studies, board resolutions approving inter‑company transactions, and correspondence with the ITD for a minimum of eight years from the end of the relevant Tax Year, or as otherwise prescribed under the Rules, 2026.

Cheat‑Sheet: Entity‑by‑Entity Reporting and Income Tax Act Tax Planning India Obligations

Conclusion: Your 30/60/90‑Day Roadmap for Income Tax Act Tax Planning India

The Income‑tax Act, 2025 is not a future event, it is operational. Every day of delay in updating systems, notifying vendors and re‑modelling tax provisions increases the risk of mismatched credits, penalty interest and avoidable litigation. The compliance checklist for businesses set out in this guide provides a structured, prioritised path from Day 0 through Day 90.

By Day 30: TDS/TCS codes updated, vendor notifications issued, Form 26AS reconciled, internal training completed. By Day 60: MAT/final‑tax impact modelled, advance‑tax instalments recalculated, contracts amended. By Day 90: TP documentation updated, test ITR filed, dispute‑readiness protocol in place.

The checklist is designed to be downloaded, assigned and tracked. For entity‑specific guidance, particularly for cross‑border structures, M&A transactions straddling the transition date, or complex MAT credit positions, professional advisory support is strongly recommended. The transition from the 1961 Act to the 2025 Act is the most significant reform in Indian direct‑tax history in over six decades; proactive income tax act tax planning India‑wide will separate compliant, audit‑ready organisations from those exposed to unnecessary cost and risk.

Sources

1. Income‑tax Act, 2025 (official PDF), Income Tax Department
2. Income‑tax Rules, 2026 (official), Income Tax Department
3. FAQs on Interplay and Transition, Income Tax Department
4. ClearTax, Income Tax Rules 2026 guides
5. RSM India, Income‑tax Act, 2025 transition workshop
6. India Briefing, compliance guide for companies
7. Fox Mandal, firm commentary on Act 2025
8. ClearTax, Draft Income Tax Rules explanatory article
9. IndiaCode, statutory archive