Meera's first crossing of ₹1 cr was three years ago. Tax audit is now routine — every year a CA stamps Form 3CD by 30 September. But she sees friends with smaller numbers panicking each September, unsure if they need it.
The 44AB rule is mechanical: two thresholds, two outcomes.
- Business: tax audit required if turnover > ₹1 cr. (₹10 cr if cash receipts/payments ≤ 5%.)
- Profession: tax audit required if gross receipts > ₹50L.
- Deadline: 30 September (audit report) → ITR by 31 October.
- Penalty: 0.5% of turnover OR ₹1.5L — whichever lower. Plus risk of disallowance.
Who needs a tax audit
Business
Turnover-based
> ₹1 cr turnover triggers audit. ₹10 cr threshold if cash inflows + outflows are ≤ 5% of total (digital-heavy businesses).
Profession
Receipts-based
> ₹50L gross receipts triggers audit. Includes CA, doctor, lawyer, consultant, IT pro, designer, etc.
Presumptive opt-out
44AD / 44ADA
If you opted out of presumptive (declared less than 8%/50% deemed profit) AND income exceeds basic exemption → audit triggered.
The audit report — Form 3CA / 3CB + 3CD
The CA conducts the audit and issues two parts:
- Form 3CA — for entities already audited under another law (companies under Companies Act). Just a tax-audit overlay.
- Form 3CB — for everyone else (proprietorships, partnerships, LLPs, professionals). Includes opinion on books.
- Form 3CD — the heart of the audit. 44 clauses covering depreciation, methods of accounting, transactions disallowed under Sec 40(a), TDS compliance, GST reconciliation, etc.
The September-October timeline
Earlier the better. By July if you know you're crossing threshold.
Books, bank statements, GST returns, TDS challans, fixed asset register, ledger summaries.
Uploaded on IT portal under your PAN. You approve via DSC.
ITR-3 (proprietor / partnership) or ITR-5 / ITR-6 (LLP / company). 3CA / 3CB / 3CD referenced.
Form 3CD — the 44 clauses
The CA fills 44 clauses. The ones you'll be asked about:
- Clause 11: method of accounting (cash vs accrual)
- Clause 12: deviation from accounting standards
- Clause 13: depreciation per IT Act vs books
- Clause 14: profits chargeable u/s 41 (recovered bad debts, etc.)
- Clause 16: capital gains / losses
- Clause 17: PSU loans
- Clause 18 / 21: cash transactions > ₹10k (Sec 40A(3))
- Clause 21(b): TDS-not-deducted-on-expenses (40(a)(ia) disallowance)
- Clause 26: contributions to pension / superannuation / gratuity
- Clause 27: ICDS compliance
- Clause 28: amounts deemed as profit u/s 43CA (property)
- Clause 30 / 30C: GTPA-type transactions
- Clause 31: cash receipts / repayments > ₹20k (269SS / T / 269ST)
- Clause 34: TDS compliance summary
- Clause 44: GST turnover reconciliation (added in 2022 amendment)
If you paid a vendor without deducting TDS (when required), the auditor reports the expense as disallowed under Sec 40(a)(ia) — 30% disallowance. That's a real tax hit beyond the audit fee. Get TDS right through the year — don't wait for the audit.
What it costs
Penalty under Sec 271B: 0.5% of turnover OR ₹1,50,000 — whichever is lower. For a ₹2 cr business that's ₹1L. Small fee compared to the late-filing chaos that usually follows.
How to make audit cheap and clean
👉 Books clean by August. Monthly close discipline through the year matters here.
👉 TDS audited continuously. Don't deduct retro in September.
👉 GST reconciliation done quarterly. Clause 44 is now a hard reconcile.
👉 Fixed asset register up to date. Depreciation under IT Act and books differ; CA needs both.
👉 Cash transactions limited. Above ₹10k single-day → Sec 40A(3) disallowance; ₹20k loan/repay → Sec 269SS/T.
Tax audit isn't the painful part — bad books are. Spend ₹2k/month on bookkeeping all year and the audit is a 2-week formality. Skip bookkeeping and the audit becomes a 6-week forensic exercise.
Quick answers
Yes — start tightening books now. If cash ≤ 5% of receipts, threshold is ₹10 cr; but most small businesses don't qualify for that. Default to ₹1 cr.
Can be. They're separate engagements but data overlaps heavily. Bundling saves cost. GSTR-9C is self-certified now (no mandatory CA for < ₹5 cr), so most SMBs only need 44AB tax audit.
Yes. File audit (with penalty deposited) and then ITR. ITR-3 / 5 / 6 won't accept without audit upload first.
Yes — ₹50L crossed = audit. Engage by July, finalise by September.
30% disallowance kicks in that year. Pay TDS in current year + interest → disallowance reverses in current year (deduction allowed when paid). Doesn't refund tax for prior year unless you revise via ITR-U.
When you might want help
Tax audit needs a CA. Where the value is highest: engaging early (July), supplying clean book data, pre-audit TDS reconciliation, and clause-by-clause review of 3CD before signing. We do this as a packaged engagement with monthly bookkeeping + GST + TDS.
Crossing the audit threshold?
End-to-end audit, ITR, GST 9C — one engagement, one fixed fee, one September deadline.