A tax audit under Section 44AB is required if business turnover exceeds Rs.1 crore (Rs.10 crore where cash receipts and payments are each up to 5%), or if professional receipts exceed Rs.50 lakh. It also applies in certain presumptive-tax cases. The audit report (Form 3CA/3CB and 3CD) is due by 30 September of the assessment year.
The thresholds
| Category | Audit threshold |
|---|---|
| Business (general) | Turnover > Rs.1 crore |
| Business with cash receipts & payments ≤ 5% | Turnover > Rs.10 crore |
| Profession | Gross receipts > Rs.50 lakh |
| Presumptive 44AD opted out / income below limit | Audit if total income exceeds basic exemption |
| Presumptive 44ADA below 50% | Audit if income claimed below presumptive and above exemption |
The Rs.10 crore relief requires that both aggregate cash receipts and aggregate cash payments do not exceed 5% of the respective totals.
The 5% cash test in practice
The digital-economy relief (Rs.10 crore limit) is widely available but easy to breach: even a small proportion of cash collections or cash expenses above 5% pulls the limit back to Rs.1 crore. Track the cash ratio through the year, and note that certain banking-channel receipts/payments are treated as non-cash.
Forms and due date
The audit is reported in Form 3CA (where accounts are audited under another law) or Form 3CB (otherwise), together with the Form 3CD statement of particulars. The report must be filed by 30 September of the assessment year, and the return by 31 October. See 3CA vs 3CB vs 3CD.
Consequences of non-audit
Failure to get accounts audited attracts penalty under Section 271B — 0.5% of turnover/gross receipts, up to Rs.1,50,000 — unless reasonable cause is shown. Late filing of the audit report also defers the return and can attract 234A interest.
The applicability decision tree
| Taxpayer | Threshold (FY 2026-27) | Audit? |
|---|---|---|
| Business, cash receipts AND cash payments each ≤ 5% | Turnover up to Rs.10 crore | No |
| Business, cash beyond 5% on either side | Turnover > Rs.1 crore | Yes |
| Profession | Gross receipts > Rs.50 lakh (Rs.75 lakh where cash receipts ≤ 5%) | Yes above limit |
| 44AD presumptive, declaring below 8%/6% with income above basic exemption | — | Yes (44AD(4) read with 44AB(e)) |
| 44ADA presumptive, declaring below 50% with income above basic exemption | — | Yes |
The 5% cash test is the pivot for most SMEs: digital-first businesses ride the Rs.10 crore limit, cash-heavy trades audit at Rs.1 crore. Count both sides — receipts and payments — and note that cheque receipts that are not account-payee count as cash for this test.
The presumptive trap in 44AD(4)
A trader who used 44AD for FY 2024-25 and opts out for FY 2025-26 (declaring 5% actual margin) is locked out of 44AD for five years — and for each of those years, if total income exceeds the basic exemption, books and audit become mandatory regardless of turnover. This is the most common surprise audit trigger we see: the taxpayer thinks "turnover below Rs.1 crore, no audit", but 44AB(e) says otherwise. Plan the opt-out year deliberately, not as a filing-season improvisation.
What the auditor certifies — and what to prepare
- Form 3CA (already audited under another law — companies) or 3CB (others), plus the 44-clause Form 3CD.
- The high-attention 3CD clauses: 21 (disallowable amounts — personal expenses, penalties), 22 (MSME interest under Section 23 of the MSMED Act — now linked to the 43B(h) disallowance for delayed MSME payments), 26 (43B items: statutory dues paid after year-end), 31 (269SS/269T cash loan acceptance/repayment), 34 (TDS/TCS compliance grid — every default surfaces here), and 44 (GST-wise expense break-up, reconciling books to GST returns).
- Prepare the reconciliations before the auditor asks: GST turnover vs books (clause 44 flows from it), 26AS/AIS vs revenue, TDS returns vs expense ledgers, and the MSME ageing from the vendor master.
Deadlines: audit report by 30 September 2027, return by 31 October 2027. Penalty for failure under Section 271B: 0.5% of turnover, capped at Rs.1,50,000, with reasonable-cause relief available. From 1 April 2026 the provision continues within the Income-tax Act 2025 framework (44AB's successor); thresholds are unchanged. Verify at incometax.gov.in.
Turnover computation: the inclusions that surprise
"Turnover" for 44AB is computed on ordinary commercial principles, but the edge cases decide audit applicability every year: speculative and F&O transactions count at the aggregate of absolute profits and losses (not contract values) per the ICAI Guidance Note — an active derivatives trader with Rs.80 lakh of absolute P&L swings is under the professional-turnover conversation even with modest net income; GST collected is excluded where credited separately but included where routed through turnover in the books — keep the ledger design consistent; sale of fixed assets and investment gains are excluded; duty drawback and export incentives are included for traders. For agents, only commission counts — not the principal's goods value. Get the turnover memo signed off before September: the audit-or-no-audit call gates the return form, the due date, and the 44AD election all at once.
Key takeaways
- Business: Rs.1 crore, or Rs.10 crore if cash <= 5% both sides.
- Profession: Rs.50 lakh of gross receipts.
- Report in Form 3CA/3CB + 3CD by 30 September.
- Non-audit penalty: 0.5% of turnover, up to Rs.1.5 lakh (Section 271B).