What Happens When Turnover Crosses ₹40 Lakhs? Business Codes, GST, and F&O Tax Audit Rules (AY 2026-27)

By FnOTax India Editorial Board · Updated 2026-05-29 · F&O Tax Audit

Source basis: This research draft is checked against listed official sources where available. It is educational guidance, not personalized tax advice.

If you search the web for the query “iss business code par agar Turnover 40 lacs se upar hoga?” (What happens to this business code if turnover crosses ₹40 Lakhs?), almost every existing article gives you the wrong answer.

They immediately jump to explaining the ₹1 Crore or ₹10 Crore Income Tax Audit limits for F&O trading, completely ignoring the significance of the ₹40 Lakhs threshold.

Here is the truth: ₹40 Lakhs is not an Income Tax Audit limit. It is the mandatory GST registration threshold for businesses dealing in goods. Furthermore, crossing ₹40 Lakhs places you squarely in the middle of the Presumptive Taxation scheme (Section 44AD) for Income Tax.

Taxation is a game of definitions. Define your business code wrong, and you invite notices. Define it right, and compliance becomes a simple checklist.

In this comprehensive, 2026-updated guide, we will decode exactly what happens when your turnover crosses ₹40 Lakhs, how your specific ITR Business Code dictates your GST and Income Tax compliance, and the exact rules for F&O traders.

The ₹40 Lakhs Milestone: Goods vs. Services

When you file your Income Tax Return (ITR-3 or ITR-4), you must select a “Nature of Business” code. This code tells the government exactly what you do.

The moment your turnover crosses ₹40 Lakhs, the first department that cares is not Income Tax—it is GST. However, the applicability of GST depends entirely on whether your business code represents Goods, Services, or Securities.

1. Business Codes for Goods (The ₹40 Lakhs Rule)

If your business code relates to the trading or manufacturing of physical goods (e.g., Code 09028 for Retail Sale), the GST Act mandates that you must register for GST the moment your aggregate turnover crosses ₹40 Lakhs in a financial year.

2. Business Codes for Services (The ₹20 Lakhs Rule)

If your business code relates to providing services (e.g., Code 14001 for Software Development or Consulting), the GST registration threshold is much lower. You must register for GST when your turnover crosses ₹20 Lakhs.

3. Business Code 13010: Financial Intermediation (F&O Trading)

Are you an active F&O trader? Your business code is typically 13010 (Financial Intermediation) or similar codes for trading in securities.

  • The GST Exemption: Under the CGST Act, securities and derivatives are explicitly excluded from the definition of both “goods” and “services.” Therefore, even if your F&O turnover crosses ₹40 Lakhs, ₹1 Crore, or ₹100 Crore, GST registration is not required for your trading business.

The Hybrid Trap: Many taxpayers run a retail business (Goods) and trade F&O on the side. If your retail turnover is ₹30 Lakhs and your F&O turnover is ₹15 Lakhs, your aggregate turnover is ₹45 Lakhs. You have crossed the ₹40 Lakhs mark, which may trigger mandatory GST registration for your retail business.

Income Tax Implications: Section 44AA and Section 44AD

Once you cross ₹40 Lakhs in turnover, you have crossed several critical Income Tax thresholds.

Section 44AA: Maintenance of Books of Account

Under Section 44AA of the Income Tax Act, you are legally required to maintain formal books of account (ledger, journal, cash book) if:

  • Your income from business exceeds ₹1.2 Lakhs, OR
  • Your total sales/turnover exceeds ₹10 Lakhs in any of the last 3 years.

Since your turnover is above ₹40 Lakhs, Section 44AA applies to you. You must maintain books. However, the government offers an escape route: Section 44AD.

Section 44AD: Presumptive Taxation (The ₹3 Crore Limit)

If your turnover is above ₹40 Lakhs but below the statutory limit, you can opt for Presumptive Taxation under Section 44AD. This allows you to declare a fixed percentage of your turnover as profit, freeing you from maintaining detailed books of account under Section 44AA.

  • The 2026 Rule: As amended by the Finance Act 2023 (and applicable for AY 2026-27), the turnover limit for Section 44AD is ₹3 Crore, provided your cash receipts and cash payments do not exceed 5% of total receipts/payments.
  • Profit Declaration: You must declare at least 6% of your digital turnover (or 8% of cash turnover) as net profit.
  • ITR Form: If you opt for 44AD, you can file the simpler ITR-4, provided you don’t have other disqualifying factors (like total income > ₹50 Lakhs, foreign assets, capital gains, or unlisted equity holdings).

Why F&O Traders Rarely Use Section 44AD

While an F&O trader with a ₹40 Lakhs turnover can theoretically use Section 44AD, it is almost never a good idea. If your F&O turnover is ₹40 Lakhs, declaring a 6% presumptive profit means paying tax on ₹2.4 Lakhs. But what if you actually made a loss? To claim that loss, you must opt out of 44AD, maintain books, and file ITR-3.

How to Calculate F&O Turnover (The Ground Truth)

One of the biggest pain points for traders is calculating turnover. Many traders look at their broker’s “Contract Note” and panic, thinking their turnover is in the hundreds of crores.

For Income Tax purposes, F&O turnover is calculated differently. You must follow the ICAI 8th Edition Guidance Note on Tax Audit u/s 44AB (issued 19 August 2022).

The Formula: F&O Turnover = Sum of Absolute Profits + Sum of Absolute Losses

  • Absolute means ignoring the negative sign. If you make a ₹10,000 profit on Nifty options and a ₹5,000 loss on BankNifty options, your net profit is ₹5,000, but your turnover is ₹15,000 (10,000 + 5,000).
  • Crucial 2026 Clarification: Premium received on options writing (selling) is NOT added separately to the turnover. The absolute profit/loss figure already accounts for the premium.

Tax Audit Rules for F&O (Section 44AB)

If your turnover crosses ₹40 Lakhs, do you need a tax audit? No. The audit limits are much higher, but they come with strict conditions.

1. The Basic Threshold (₹1 Crore vs. ₹10 Crore)

Under Section 44AB(a), a tax audit is mandatory if your business turnover exceeds ₹1 Crore. However, this threshold is raised to ₹10 Crore IF your cash receipts and cash payments each do not exceed 5% of the total.

Since F&O trading is 100% digital (routed through bank accounts and brokers), the ₹10 Crore threshold is effectively applicable to all F&O traders. If your F&O turnover is ₹40 Lakhs, you are well below the ₹10 Crore limit. No audit is required under this clause.

2. The Section 44AB(e) Lock-in Trap

This is where 90% of traders make a mistake. Under Section 44AD(4), if you opted for presumptive taxation (44AD) in any of the last 5 years, and this year you decide to opt out (because you made an F&O loss or your profit is less than 6%), you trigger a trap.

If you opt out, a tax audit becomes MANDATORY under Section 44AB(e), provided your total income exceeds the basic exemption limit (₹3 Lakhs under the new tax regime). Furthermore, you are barred from re-entering the 44AD scheme for the next 5 years.

3. Penalty for Missing a Tax Audit (Section 271B)

If you are required to get an audit and fail to do so, Section 271B applies.

  • The Charge: 0.5% of your turnover OR ₹1,50,000, whichever is LOWER.
  • 2026 Update: The Finance Act 2026 officially converted this from a “penalty” to a “fee” status. The amount remains unchanged, but this reclassification was done to reduce litigation and make the levy automatic.

Worked Example: Crossing the ₹40 Lakhs Mark

Let’s look at a real-world scenario for AY 2026-27.

Meet Rahul. Rahul runs a mobile accessories shop (Business Code 09028). He also trades F&O (Business Code 13010).

  • Retail Shop Sales: ₹42,000,000 (₹42 Lakhs)
  • F&O Absolute Profits: ₹3,00,000
  • F&O Absolute Losses: ₹2,00,000
  • F&O Net Profit: ₹1,00,000

Step 1: Calculate Total Turnover

  • Retail Turnover: ₹42 Lakhs
  • F&O Turnover (Absolute Profit + Loss): ₹5 Lakhs
  • Total Business Turnover: ₹47 Lakhs

Step 2: GST Implications Because Rahul’s retail business (Goods) crossed the ₹40 Lakhs threshold, he must register for GST immediately. The F&O turnover is exempt from GST, but it contributes to his aggregate PAN-level turnover.

Step 3: Income Tax Implications Rahul’s total turnover is ₹47 Lakhs. This is well below the ₹3 Crore limit for Section 44AD and the ₹10 Crore limit for Section 44AB.

  • He can opt for Section 44AD for his retail business (declaring 6% profit).
  • For F&O, since he has a net profit of ₹1 Lakh (which is 20% of his ₹5 Lakh F&O turnover—well above 6%), he does not trigger the 44AB(e) audit trap.
  • He will file ITR-3, maintaining basic books for F&O, and showing retail income under 44AD.

Loss Set-Off and Carry Forward Rules

If your F&O turnover is above ₹40 Lakhs and you end up with a net loss, you must file your ITR correctly to preserve the tax benefits of that loss.

Speculative vs. Non-Speculative (Section 43(5))

  • F&O Trading: Under Section 43(5) proviso (d), trading in derivatives on a recognized stock exchange is classified as NON-speculative business income.
  • Intraday Equity: Buying and selling shares on the same day without taking delivery is classified as Speculative business income.

These two are taxed and set off entirely differently.

Same-Year Set-Off (Section 71)

If you have an F&O loss (non-speculative), Section 71 allows you to set it off against almost any other income in the same financial year. You can adjust F&O losses against:

  • Interest income (FDs, savings)
  • Rental income (House Property)
  • Capital Gains (LTCG or STCG)
  • Other business income
  • EXCEPTION: You CANNOT set off business losses against Salary income.

Note: Intraday (speculative) losses can ONLY be set off against speculative profits.

Carry Forward (Section 72)

If you cannot fully set off your F&O loss in the current year, Section 72 allows you to carry it forward for 8 Assessment Years. In future years, it can only be set off against business income (both speculative and non-speculative).

  • Mandatory Condition: To carry forward a loss, you MUST file your ITR on or before the due date.

Compliance Checklist & Due Dates for AY 2026-27

If your business code turnover has crossed ₹40 Lakhs, follow this strict compliance checklist:

  1. Verify Your Business Code: Check if your primary code is for Goods (₹40L GST limit) or Services (₹20L GST limit).
  2. Apply for GST (If Applicable): Do not delay. Operating without GST when required attracts heavy penalties.
  3. Maintain Books (Section 44AA): Ensure you have a basic ledger, P&L, and balance sheet ready, especially if you are claiming F&O losses.
  4. Select the Right ITR Form:
    • File ITR-3 if you have F&O losses, capital gains, or do not want to opt for 44AD.
    • File ITR-4 ONLY if you are opting for 44AD presumptive taxation and have no capital gains or other disqualifying assets.
  5. Meet the Deadlines:
    • Non-Audit ITR-3 Due Date: 31 August 2026 (Extended from 31 July via Finance Act 2026). Always verify against the latest CBDT notification.
    • Tax Audit Report Due Date: 30 September 2026 (Form 3CA/3CB-3CD).
    • Audit ITR-3 Due Date: 31 October 2026.

Frequently Asked Questions (FAQs)

Does crossing ₹40 Lakhs turnover in F&O trading require GST registration? No. Securities and derivatives are excluded from the definition of goods and services under the GST Act. Therefore, F&O trading (Business Code 13010) is exempt from GST, regardless of turnover.

How is F&O turnover calculated for Income Tax? As per the ICAI 8th Edition Guidance Note (Aug 2022), F&O turnover is the sum of absolute profits and absolute losses for each trade. Premium received on options writing is not added separately.

Is a tax audit mandatory if my F&O turnover crosses ₹40 Lakhs? No. Under Section 44AB(a), the tax audit threshold for 100% digital businesses like F&O is ₹10 Crore. However, if you previously opted for Section 44AD and now declare a loss, an audit may be triggered under Section 44AB(e) if your total income exceeds the basic exemption limit.

Can I set off my F&O losses against my salary income? No. Under Section 71, F&O losses (non-speculative business loss) can be set off against any income—such as capital gains, rental income, or interest—except salary income in the same financial year.

What is the penalty for missing a mandatory tax audit? Under Section 271B (amended by Finance Act 2026 to be classified as a ‘fee’ rather than a ‘penalty’ to reduce litigation), the charge is 0.5% of your turnover or ₹1,50,000, whichever is lower.

Official sources

Source basis: The references below point to the official Indian tax sources used to inform this article. The article has not completed our full source-verification review; treat it as educational guidance only and consult a qualified Chartered Accountant before acting on it.