How Firms Should Pay Taxes and File Income Tax Returns

Running a partnership firm means more than splitting profits at the end of the year. Every firm, whether it earns a healthy profit or closes the year in a loss, has to follow a fixed set of steps to pay its taxes and file its income tax return. Missing a step, or getting the mode of payment wrong, can mean interest charges, penalties, or even losing the right to carry forward a loss. This post walks through exactly how firms are expected to pay tax and file returns under the Income Tax Act, so the process feels less like paperwork and more like a checklist you can actually follow.

Two ways a firm can pay its taxes 🔗

A firm can settle its tax dues in one of two ways: the physical mode, where a paper challan is submitted at a bank counter, or the e-payment mode, where the amount is paid online through net banking, a debit card, RTGS/NEFT, or UPI. Both routes lead to the same outcome, a valid challan that proves the tax has been paid, but which route a firm can use is not always its own choice.

When e-payment stops being optional 🔗

The Income Tax Department has made e-payment mandatory for two categories of taxpayers: every company, and every non-corporate taxpayer, including a firm, whose accounts are required to be audited under Section 44AB. If a firm’s turnover or gross receipts cross the audit threshold and its books get audited, it can no longer walk into a bank branch with a paper challan for advance tax, self-assessment tax, TDS, or TCS. Payment has to go through the e-Pay Tax service on the income tax portal, and the offline “pay at bank” option is specifically barred for these taxpayers. A firm that is not liable for audit can still choose either mode, though most find e-payment faster simply because it avoids the queue.

Tax audit itself kicks in once a firm’s business turnover crosses ₹1 crore (or ₹10 crore where cash receipts and payments each stay within 5% of the total), or once gross receipts from a profession cross ₹50 lakh. If your firm sits above these limits, plan for electronic payments from the very first advance tax instalment of the year.

Advance tax: paying as you earn, not after you earn 🔗

Firms are not allowed to wait until the year ends to settle their entire tax bill. If a firm’s estimated tax liability for the year, after adjusting for TDS, works out to ₹10,000 or more, it must pay advance tax in instalments spread across the financial year. This “pay-as-you-earn” system applies to partnership firms and LLPs just as it applies to companies and individuals, and firms rarely fall below the ₹10,000 threshold since business income is taxed at a flat rate.

The instalment schedule is cumulative, meaning each payment adds to what was already paid earlier in the year:

Unlike individuals under presumptive taxation, a firm does not get the option to clear the whole amount in a single instalment by March. It has to estimate income carefully and pay through the year. Falling short at any stage triggers interest, so it pays to review the firm’s actual performance against the estimate every quarter rather than guessing once and forgetting about it. This interest for shortfall or delay in advance tax was traditionally charged under Sections 234B and 234C of the Income-tax Act, 1961; these provisions have since been renumbered under the Income-tax Act, 2025, but the 1% per month structure continues.

Filing the return is compulsory, income or no income 🔗

Here is a rule that surprises many new partners: a firm has to file its income tax return every year, regardless of whether it made a profit, broke even, or ran into a loss. There is no minimum income exemption for firms the way there is for individuals. Even a firm with zero income during the year, or one that has not started active business yet, is required to file. Skipping this step, according to tax filing guidance for firms and LLPs, can lead to penalties, interest, and the loss of benefits such as carrying forward losses to future years.

Choosing the right form 🔗

Firms, including LLPs, file their return using Form ITR-5. This form is quite detailed compared to what an individual fills out. It asks for a full balance sheet, profit and loss account, and a computation of business income, along with details of each partner’s profit-sharing ratio. A firm cannot use ITR-3 or ITR-4; those forms are meant for individuals and Hindu Undivided Families running a business, not for the firm as a separate assessable entity.

When a digital signature becomes necessary 🔗

A firm whose accounts are audited under Section 44AB cannot simply verify its return with an OTP or net banking login. It is required to file the return using a valid digital signature certificate (DSC) belonging to an authorised partner. This is a strict requirement, and there is no fallback verification method for audited firms once the DSC route applies. A firm that is not liable for audit has more flexibility and can typically verify its return through an electronic verification code (EVC), such as via Aadhaar OTP or net banking, without needing a DSC at all.

Who actually signs the return 🔗

The return of a firm is signed and verified by the managing partner. If, for any reason, there is no managing partner or that person is unable to sign, any other partner who is not a minor can sign in their place. In LLPs, this responsibility falls specifically on a designated partner. Getting this detail right matters, because a return verified by someone who is not authorised to sign is treated as an invalid or defective filing, which defeats the purpose of filing on time in the first place.

Deadlines that decide your compliance record 🔗

For firms not liable to audit, the return generally has to be filed by 31 July following the end of the financial year. For firms that do require an audit under Section 44AB, the audit report itself has to be filed first, typically by 30 September, and the income tax return follows by 31 October. Firms involved in international or specified domestic transactions requiring a transfer pricing report get a slightly later window, extending into November. These dates can shift if the Central Board of Direct Taxes announces an extension, so it is worth checking the official portal closer to the deadline rather than relying on last year’s dates.

Missing these deadlines is costly beyond just a late fee. A firm that files after the due date loses the ability to carry forward business losses and capital losses to set off against future profits, which can mean a real tax cost years down the line, not just a one-time penalty.

Putting it all together 🔗

The process for a firm boils down to three linked obligations: pay tax on time through the correct mode, estimate and clear advance tax through the year rather than in one lump sum, and file the return every single year using ITR-5 with the right signing authority and verification method. Audited firms carry an extra layer of discipline, mandatory e-payment and mandatory digital signatures, precisely because the scale of their operations calls for tighter compliance.

What do you think? If a firm consistently underestimates its advance tax and pays the shortfall only at year-end, is the interest charged under the law enough of a deterrent, or does it end up being cheaper than borrowing working capital elsewhere? And should smaller firms below the audit threshold be allowed the same flexibility in advance tax instalments that presumptive taxpayers get?

References

1. https://www.incometax.gov.in/iec/foportal/help/e-PayTax-faqs
2. https://www.indiafilings.com/learn/advance-tax-payment
3. https://cleartax.in/s/advance-tax
4. https://ebizfiling.com/blog/itr-form-5-filing/
5. https://cleartax.in/s/tax-audit-section-44ab