Income Tax Changes for SMEs from April 2026: What Business Owners Must Know

If you run a small or medium business in India, the income tax rules that governed your compliance for the past 65 years have been replaced. The Income Tax Act 2025 took effect on April 1, 2026, and it changes how you file, when you file, and which forms you use.

This guide focuses specifically on what matters for SME owners and founders, cutting through the noise of changes that only affect large corporations or salaried individuals.

What Actually Changed for Your Business

1. New Section Numbers for Everything

Every section reference you and your CA have memorized is now different. Section 44AD (presumptive taxation) has a new number. Section 80C deductions, Section 194C TDS, Section 40(a)(ia) disallowances, all have new references under the new Act.

Why this matters for you: When your CA references sections in communications, tax planning discussions, or audit responses, they will use new numbers. Update your knowledge or ensure your CA explains the mapping.

2. Permanent August 31 Deadline for ITR-3 and ITR-4

Previously, the standard ITR filing deadline was July 31, with extensions granted ad hoc. Under the new rules:

• ITR-1 and ITR-2 (salaried, no business income): July 31 deadline
• ITR-3 (business income with books): August 31 deadline (permanent)
• ITR-4 (presumptive taxation, audit cases): August 31 deadline (permanent)

This is good news for business owners. You get an extra month compared to the old July 31 deadline, and it is permanent rather than dependent on annual extensions.

3. Tax Regime Lock for Business Income

The new tax regime (lower rates, fewer deductions) is now the default for everyone. If you prefer the old regime (higher rates but more deductions), you must explicitly opt in.

For business owners, this choice is locked. Once you select a regime, you cannot switch back and forth each year without meeting specific conditions. This makes the initial choice critical.

When to choose the old regime:

• You have significant deductions (80C investments, home loan interest, medical insurance)
• Your business claims depreciation on assets
• You have significant allowances that reduce taxable income

When to stay with the new regime:

• Your deductions are minimal
• You want simpler compliance
• The lower slab rates result in less tax even without deductions

Run calculations under both regimes before filing your first return under the new Act.

4. Stricter Presumptive Taxation Rules

If you use Section 44AD presumptive taxation (now under a new section number):

• Digital receipt threshold: Rs 3 crore turnover if 95%+ receipts are digital
• Cash receipt threshold: Rs 2 crore turnover
• Professional threshold: Rs 75 lakh gross receipts

If you exceed these thresholds, you must maintain full books of accounts and get them audited. The switch from ITR-4 to ITR-3 is mandatory.

5. Enhanced TDS Compliance

TDS section numbers have changed entirely. If your business deducts TDS on:

• Contractor payments (old 194C)
• Professional fees (old 194J)
• Rent payments (old 194I)
• Commission or brokerage (old 194H)

You need the new section numbers for filing TDS returns (Form 26Q) and issuing TDS certificates. Your accounting software may need an update.

Action Items for SME Owners

Before June 2026

1. Ask your CA for a section number mapping sheet. You need to know the new equivalents of the 5-10 sections most relevant to your business.

2. Decide on tax regime. Run old vs new regime calculations based on your FY 2025-26 income and deductions.

3. Verify AIS data. Log in to the e-filing portal and download your Annual Information Statement. Every financial transaction reported by banks, mutual funds, and property registrars should match your records.

4. Review advance tax payments. If you paid advance tax during FY 2025-26, verify that all challans appear in your Form 26AS.

Before August 2026

5. Collect all documents for ITR filing. For ITR-3 filers: audited financial statements, balance sheet, P&L, tax audit report. For ITR-4 filers: turnover summary, bank statements, GST return copies.

6. File ITR before August 31. The permanent deadline gives you time, but filing early avoids portal congestion.

7. E-verify within 30 days. After filing, complete e-verification through Aadhaar OTP, EVC, or net banking.

Ongoing

8. Update your accounting software. Ensure it reflects new section numbers for TDS, advance tax, and deductions.

9. Update TDS return templates. Form 26Q must reference new section numbers from FY 2026-27 onwards.

What Has Not Changed

Some things remain the same despite the new Act:

• Tax slab rates are set by the Finance Act, not the Income Tax Act. Your actual tax rate depends on the annual budget.
• GST and income tax remain separate compliance systems.
• Advance tax quarterly payment schedule remains unchanged (June 15, September 15, December 15, March 15).
• The audit requirement threshold (Rs 1 crore turnover, or Rs 10 crore with 95%+ digital) has not changed.

Common Mistakes SME Owners Should Avoid

1. Assuming nothing changed because rates are the same. The structural changes (forms, sections, deadlines, regime rules) are significant even if your tax rate did not change.

2. Not updating the tax regime choice. If you do nothing, the new regime applies by default. If the old regime is better for you, you must actively opt in.

3. Using old section numbers in TDS returns. Filing TDS returns with old section references will cause processing errors.

4. Missing the permanent August 31 deadline. Just because the deadline moved does not mean you should wait until August. File early to avoid year-end rush.

Let TaxGarden Handle Your Business Tax Compliance

Navigating new section numbers, regime choices, and restructured forms is exactly the kind of work that benefits from professional support. TaxGarden's tax compliance plans cover ITR filing, TDS returns, advance tax planning, and ongoing compliance for SMEs.

Frequently Asked Questions

Is the August 31 deadline permanent or just for this year?

Permanent. Under the new Act, ITR-3 and ITR-4 (audit cases) have a fixed August 31 deadline. This is no longer subject to annual extensions.

Can I switch between old and new tax regime each year?

For salaried individuals without business income, switching is easier. For business owners, the regime choice is locked once made and cannot be changed without meeting specific conditions under the new Act.

Do I need a new PAN or TAN?

No. Your existing PAN and TAN continue to work. The new Act does not require any new registration for existing taxpayers.

What if my CA does not know the new section numbers?

All practicing CAs are expected to update their knowledge. ICAI has published mapping guides. If your CA has not updated, consider it a red flag and seek updated guidance.

Does the new Act affect my GST compliance?

No. GST operates under the CGST Act, which is separate from the Income Tax Act. Your GST compliance, returns, and procedures remain unchanged by the new Income Tax Act.