Business ITR Filing in India — Forms, Audit and Due Dates
A business income tax return reports profit computed from books of account rather than from a salary slip. That single difference changes almost everything: the form is longer, a balance sheet and profit-and-loss statement have to be reported, depreciation and disallowances have to be worked out, an audit may be compulsory, and advance tax is paid in instalments through the year rather than settled at the end.
Which return you file depends on how the business is owned, not on what it sells. A proprietor files in their own name, a firm or LLP files as an entity, and a company files as a company with a compulsory audit regardless of turnover. Getting the entity-to-form mapping right is the first decision, and it is the one most often got wrong.
This guide covers the form for each structure, entity tax rates, presumptive taxation and its lock-in, the audit triggers under the current framework, books and documents, the filing sequence, advance tax, common disallowances, loss carry-forward, and the penalties for getting it late or wrong.
Chennai combines automotive, IT, and professional services. Tamil Nadu GST and professional tax interfaces often run alongside MCA compliance; we support bilingual document packs when banks or landlords require them.
What is business ITR filing?
Business ITR filing is the annual return in which a business declares turnover, computes taxable profit after statutory adjustments, and reconciles that against TDS credited to it, advance tax paid, and self-assessment tax. Unlike a salaried return, the numbers come out of accounts that you are legally required to maintain, and the return reports those accounts in schedule form.
Accounting profit and taxable profit are rarely the same figure. Depreciation is recomputed on the income-tax block-of-assets method, certain expenses are disallowed for late TDS deposit or cash payment, provisions are added back, and statutory dues are allowed only on actual payment within the prescribed time. The return is where that bridge is built and disclosed.
Filing is compulsory for every company, firm, and LLP whether or not there was any income — a loss year and a dormant year both require a return.
Which return does your business structure file?
| Business structure | Return filed | Audit position |
|---|---|---|
| Proprietorship | ITR-3 in the proprietor's own name, or ITR-4 if presumptive | Tax audit only on crossing the prescribed turnover or receipts limit |
| Partnership firm | ITR-5 by the firm; partners file ITR-3 separately | Tax audit on crossing the prescribed limit |
| LLP | ITR-5 by the LLP | Tax audit on crossing the limit; statutory audit under LLP law above prescribed thresholds |
| Private or public limited company | ITR-6 | Statutory audit every year regardless of turnover |
| One Person Company | ITR-6 | Statutory audit every year |
| Section 8 company or trust claiming exemption | ITR-7 | Audit report in the prescribed form for the exemption claim |
| Co-operative society, AOP, BOI, business trust | ITR-5 | Depends on turnover and the governing law |
The detail people miss: a working partner does not file the firm's return. The firm files ITR-5; the partner files ITR-3 and reports remuneration, interest on capital, and share of profit. A company always files ITR-6 unless it is claiming the charitable exemption, in which case it files ITR-7.
Which Act and which forms apply to this year's business return?
The Income-tax Act, 2025 came into force on 1 April 2026 and governs income of the tax year 2026-27 onwards. Profit of the financial year 2025-26 is still assessed for assessment year 2026-27 under the Income-tax Act, 1961, on the ITR forms substituted for that year, and the tax audit report for that year is furnished in the old audit forms.
From the tax year 2026-27, several familiar reference points have been renumbered. The audit provision moves from the old section 44AB to section 63, the presumptive provisions consolidate into section 58, and the audit report itself is furnished in a single new form that combines the earlier report and particulars annexure. The thresholds have carried forward largely unchanged; the citations have not.
The practical instruction is simple — do not reuse last year's form numbers or section references from memory. Confirm the notified form for the year you are filing before the working papers are finalised.
What tax rate does a business pay?
| Entity | Base rate position | Notes |
|---|---|---|
| Proprietorship | Slab rates of the proprietor | Default concessional regime applies unless the prescribed opt-out form is filed on time |
| Partnership firm | Flat entity rate | Surcharge above the prescribed income level, plus cess |
| LLP | Flat entity rate, same as a firm | Alternate minimum tax can apply where specified deductions are claimed |
| Domestic company — default track | Lower rate where turnover in the prescribed base year is within the threshold, otherwise the standard rate | Minimum alternate tax applies on book profit |
| Domestic company — concessional option | Reduced rate with a flat surcharge | Most deductions forgone; the election is irreversible; minimum alternate tax does not apply |
| New manufacturing company option | Lowest rate for eligible manufacturers | Strict eligibility and timing conditions; irreversible |
Rates, surcharge bands, and turnover thresholds are set by the annual Finance Act and the base year for the company turnover test moves each year, so treat the table as structure rather than as figures. The concessional company options are exercised by filing a prescribed form on or before the return due date, and missing that form is one of the more expensive administrative slips in corporate tax.
Who can use presumptive taxation?
Presumptive taxation lets a small business declare a fixed percentage of turnover as profit, skip detailed books, and stay outside audit. It is available to resident individuals, HUFs, and partnership firms — not to LLPs and not to companies.
- Eligible businesses declare the prescribed percentage of turnover, with a lower percentage for non-cash receipts than for cash receipts
- The turnover ceiling is enhanced where cash receipts stay within the prescribed small proportion of total receipts
- Eligible professionals declare the prescribed percentage of gross receipts, with a similar enhanced ceiling for largely non-cash practices
- Goods-carriage operators have a separate per-vehicle presumptive computation
- Presumptive filers use ITR-4 and are outside the tax-audit requirement while they stay within the scheme
- Advance tax for presumptive business income is payable in a single consolidated instalment
- Once you opt in, staying out for a year triggers a multi-year lock-out from the scheme
Two traps deserve naming. Firms on the presumptive scheme have long argued about whether partner remuneration and interest remain deductible from presumptive income — the position is contested in practice, so a firm on presumptive taxation should have the computation reviewed rather than assume either answer. And declaring profit below the presumptive percentage is itself an audit trigger under the current framework, even for a business that never opted into the scheme.
When does a tax audit become compulsory?
- 1.Business turnover exceeds the prescribed limit for the year
- 2.That limit is raised substantially where both cash receipts and cash payments each stay within the prescribed small percentage of the respective totals
- 3.Professional gross receipts exceed the prescribed limit
- 4.A taxpayer eligible for a presumptive scheme declares profit lower than the deemed percentage
- 5.A taxpayer who opted into the presumptive scheme opts out within the lock-in period and has total income above the basic exemption limit
- 6.A specified presumptive business under the transport or non-resident computation declares less than the deemed profit
The fourth trigger is the one that has changed character. Under the current framework a person carrying on a business covered by the presumptive provision who declares profit below the deemed percentage is required to get accounts audited — which brings a large number of small loss-making and thin-margin businesses into audit that were previously outside it. If your declared margin is below the presumptive percentage, check the audit position before you file, not after.
The audit report is furnished electronically by the auditor and accepted by the taxpayer, and it is due one month before the return due date. A statutory audit under company or LLP law is a separate exercise from the tax audit and neither substitutes for the other.
What books of account must a business maintain?
Specified professions must maintain prescribed books once receipts cross the statutory limit; other businesses must maintain books sufficient to compute income once turnover or income crosses the prescribed thresholds. Companies and LLPs maintain books under their own governing law in any case, and a presumptive filer within the scheme is relieved of the detailed requirement.
- Cash book, ledger, and journal, reconciled to bank statements monthly
- Sales and purchase registers tying to the GST returns filed for the same period
- Fixed-asset register with dates of put-to-use for depreciation
- Stock and work-in-progress records with a year-end valuation basis
- Debtor and creditor ageing, and confirmations for material balances
- Loan and interest schedules, with lender PANs where required
- Payroll records, provident fund and ESI challans, and TDS working
- Bills and vouchers supporting every claimed expense
Books are also the practical link to indirect tax. Turnover reported in the income tax return and turnover reported in GST returns are matched, and an unexplained difference is a common source of enquiry. If your records are behind, close them first — see bookkeeping services.
What are the due dates for a business return?
| Situation | Return due date | Audit report due |
|---|---|---|
| Business or profession, no audit required | 31 August following the year | Not applicable |
| Partners of a firm not under audit | 31 August following the year | Not applicable |
| Any assessee subject to audit, including all companies | 31 October following the year | One month before the return date |
| Partners of a firm that is under audit | 31 October following the year | Not applicable |
| Cases requiring a transfer-pricing report | 30 November following the year | One month before the return date |
| Belated business return | Nine months from the end of the year | Late fee and loss of carry-forward |
The extension of the non-audit business date from 31 July to 31 August is a recent procedural change and it also covers partners of non-audit firms. Dates in this table are indicative — the Board extends them more often in audit years than in non-audit years, so confirm the operative date for your category.
What documents are required for business ITR filing?
- Finalised trial balance, profit-and-loss account, and balance sheet
- Audit report and its particulars annexure where an audit applies
- Bank statements for the full year for every account, including loan accounts
- GST returns and the annual reconciliation for the same period
- TDS and TCS returns filed by the business, and the resulting certificates
- Form 26AS and the Annual Information Statement for the entity PAN
- Advance tax and self-assessment tax challans
- Fixed-asset additions with invoices and put-to-use dates
- Loan sanction letters, interest certificates, and repayment schedules
- Partnership deed or LLP agreement, or the company's incorporation documents
- Related-party transaction details and any transfer-pricing documentation
- Prior-year return, computation, and the brought-forward loss and depreciation schedule
How do you file a business income tax return?
- 1.Close the books and reconcile turnover to the GST returns for the year
- 2.Reconcile TDS receivable to Form 26AS and chase deductors who have not filed
- 3.Prepare the depreciation schedule on the income-tax block-of-assets basis
- 4.Identify disallowances — late TDS deposit, cash payments above limits, unpaid statutory dues, provisions
- 5.Compute taxable profit and, for companies, run the minimum alternate tax comparison
- 6.Complete the audit and have the report accepted on the portal where applicable
- 7.File the concessional-regime or opt-out form first, where the entity is electing one
- 8.Fill the entity return with balance sheet, profit-and-loss, and computation schedules
- 9.Pay the balance tax with interest and enter the challan details
- 10.Submit and verify — with digital signature where that is compulsory
- 11.File the partners' or proprietor's personal returns consistently with the entity return
How does advance tax work for a business?
Where tax liability for the year is expected to exceed the prescribed threshold, tax is payable in instalments through the year rather than at the end. Missing or underpaying an instalment does not stop you filing, but it attracts interest for both shortfall and deferment, and that interest is not waived on the ground that profit was hard to forecast.
The practical discipline is a quarterly estimate rather than an annual one: run a rough profit projection before each instalment date, credit the TDS already deducted from your receipts, and pay the difference. Businesses on presumptive taxation get a simplified single-instalment schedule. Companies should also check the minimum alternate tax position while estimating, because a company with low taxable profit and high book profit can owe far more than its projection suggests.
Which business expenses commonly get disallowed?
- Payments where TDS was deductible but not deducted, or deducted and not deposited in time
- Cash payments to a single party above the prescribed daily limit
- Employee provident fund and ESI contributions deposited after the statutory due date
- Provisions and unascertained liabilities with no crystallised obligation
- Personal expenditure routed through the business, and unsupported travel or entertainment
- Capital expenditure claimed as revenue repairs
- Interest on capital or remuneration to partners beyond the statutory ceiling
- Penalties and fines for infraction of law, and any tax on income itself
- Corporate social responsibility spending, which is not a business deduction
- Expenses without a bill, voucher, or identifiable payee
The TDS-linked disallowance is the largest recurring one, and it is avoidable. A disciplined monthly deduction and deposit routine — see TDS return filing — protects the deduction as well as the compliance record.
What happens to a business loss?
A business loss can be set off against other income of the same year within the statutory rules, and the unabsorbed balance carried forward for the prescribed number of years to be set off against future business profit. Unabsorbed depreciation carries forward indefinitely. Speculation losses and capital losses are ring-fenced and can only be set off against the same class of income.
The condition that catches people is timeliness: carry-forward of a business loss generally requires the return to be filed by the original due date. Unabsorbed depreciation and house-property loss survive a late filing, but the trading loss usually does not. For a loss-making startup, filing on time is worth far more than the late fee suggests, and closely held companies have an additional shareholding-continuity test to satisfy before an old loss can be used.
What are the penalties for late or incorrect business filing?
| Default | Consequence | Practical effect |
|---|---|---|
| Return filed after the due date | Fixed late fee plus interest on unpaid tax | Business loss carry-forward generally lost |
| Audit report not furnished | Separate penalty linked to turnover, subject to the prescribed ceiling | Also makes the return liable to be treated as defective |
| Books not maintained as required | Fixed penalty | Weakens every subsequent defence on quantum |
| Under-reporting of income | Penalty at the prescribed proportion of tax on the under-reported amount | Doubles where the case is treated as misreporting |
| Advance tax shortfall or deferment | Interest at the prescribed monthly rate | Accrues even where the return is filed on time |
| TDS deducted but not deposited | Interest, penalty, and disallowance of the expense | Carries prosecution exposure in serious cases |
Amounts and ceilings are set by statute and change, so these are the heads of exposure rather than a price list. Reasonable cause is a defence for several of them, which is another reason to document delays as they happen rather than reconstruct them later.
What else falls due around the business return?
- 1.Quarterly TDS statements and the resulting certificates to deductees
- 2.Advance tax instalments through the year
- 3.Monthly and annual GST returns and the annual reconciliation
- 4.Statutory audit and, for companies, annual filings with the ROC
- 5.For LLPs, the annual return and statement of accounts
- 6.Provident fund and ESI monthly returns where registered
- 7.Professional tax returns in states that levy it
- 8.Director KYC and, where applicable, deposit and related-party reporting
The return is the visible deadline, but it depends on all of the above being clean. Most late business returns are late because a dependency slipped, not because the return itself was hard.
Why choose Arjun Filings for business ITR filing?
Arjun Filings runs business ITR filing as a checklist-first engagement: a qualified CA or CS scopes the work, tells you exactly which documents are needed, and reviews every form before it is signed and submitted. You get a named specialist, a status update at each stage, and a compliance calendar for whatever comes next.
- CA-reviewed business ITR filing
- Checklist before computation
- E-verification guidance
- Notice awareness when relevant