Every individual proprietor, HUF, and partnership firm whose total income exceeds the basic exemption limit must file a business income tax return every year. Under the new tax regime (default from FY 2025-26), the basic exemption is ₹4 lakh for individuals. Partnership firms and LLPs must file ITR-5 regardless of profit or loss — there is no minimum income threshold for firms. Even if your business made a loss, filing your ITR on time is important — it allows you to carry forward the business loss to offset against future profits for up to 8 assessment years.

The due date for business income tax filing depends on whether a tax audit is required. For proprietors and firms not requiring a tax audit, the due date is 31 August of the assessment year — for FY 2025-26, this is 31 August 2026. For businesses requiring a tax audit under Section 44AB, the ITR due date is 31 October 2026, and the Tax Audit Report in Form 3CA/3CB along with Form 3CD must be filed by 30 September 2026. Missing these deadlines attracts a late fee under Section 234F of ₹5,000 for income above ₹5 lakh and ₹1,000 for income below ₹5 lakh, plus interest at 1% per month on unpaid tax under Section 234A.

The correct ITR form depends on your business structure and how you report income. ITR-4 (Sugam) is for proprietors and individuals who opt for presumptive taxation under Section 44AD — declaring 8% or 6% of turnover as profit without maintaining full books of accounts, provided turnover does not exceed ₹2 crore (₹3 crore if 95%+ receipts are digital). ITR-3 is for proprietors and HUFs who maintain full books of accounts, have turnover above the presumptive limit, or choose to declare actual profits. Partnership firms use ITR-5. Filing the wrong ITR form results in a defective return notice under Section 139(9). Tax Robo’s CAs select the correct form based on your complete income profile before filing.

ITR filing for business owners under presumptive taxation (Section 44AD) is the simplest route for small businesses with turnover up to ₹2 crore (₹3 crore for 95%+ digital). Under this scheme, you declare 8% of turnover as profit (6% if turnover is received digitally), pay tax on that amount, and file ITR-4 — without maintaining detailed books of accounts or getting a tax audit done. This significantly reduces the compliance burden for small proprietors, shopkeepers, and traders. However, if you opt out of Section 44AD in any year, you cannot re-enter the scheme for the next 5 assessment years and must maintain full books during that period.

Presumptive taxation Section 44AD is an optional scheme for small business owners that allows you to declare a fixed percentage of turnover as profit without maintaining detailed books of accounts. The scheme is available to resident individual proprietors, HUFs, and partnership firms (not LLPs) with business turnover up to ₹2 crore in a financial year — extended to ₹3 crore if at least 95% of receipts are through digital or banking channels. Under this scheme, profit is assumed to be 8% of turnover (6% for digital receipts), and you pay income tax on this presumed profit. You cannot use Section 44AD if you are a professional (doctors, lawyers, architects use Section 44ADA instead), or if your business is covered under Sections 44AE, 44BB, or 44BBB.

Tax audit under Section 44AB is mandatory for a business when turnover exceeds ₹1 crore in a financial year. However, if at least 95% of your gross receipts and 95% of gross payments are through non-cash (digital) modes throughout the year, the tax audit threshold is enhanced to ₹10 crore. Tax audit is also mandatory if you are filing under the presumptive scheme (Section 44AD) and declare profit below 8% or 6% of turnover, and your total income exceeds the basic exemption limit. The Tax Audit Report in Form 3CA/3CB and Form 3CD must be signed by a practicing Chartered Accountant and filed on the income tax portal by 30 September 2026 for FY 2025-26. Tax Robo handles tax audit and report filing for all eligible businesses.

A business income tax return India filing includes several components beyond just filling in income figures. For non-presumptive filers, it includes preparation of profit and loss account showing all business income and expenses, balance sheet showing assets and liabilities as on 31 March, depreciation schedule for fixed assets, income tax computation reconciling book profit with taxable income, 26AS and AIS reconciliation to match TDS credits, advance tax computation and payment details, and finally ITR preparation and e-filing on the income tax portal. Tax Robo prepares all these components as part of every business income tax filing engagement — your complete annual compliance covered under one fixed fee.

If a business files its income tax return after the due date, a late fee under Section 234F is charged — ₹5,000 if income exceeds ₹5 lakh, and ₹1,000 if income is up to ₹5 lakh. In addition, interest at 1% per month under Section 234A is charged on any unpaid tax from the due date. For businesses, late filing also means you cannot carry forward business losses from the current year to offset against future profits — a significant financial disadvantage if your business made a loss. For audit cases, failing to file the Tax Audit Report by 30 September attracts a separate penalty of 0.5% of turnover or ₹1,50,000 — whichever is lower. Tax Robo tracks all deadlines and ensures your business ITR and audit report are filed before the due date every year.