Calculating Tax Liability for Partnership Firms

Most students first meet partnership firm taxation expecting it to work like personal income tax, with slabs, exemptions, and a rebate at the end. It doesn’t. A firm is taxed as a separate person under the Income Tax Act, and the moment you understand that one shift, the rest of the computation falls into place. This post walks through exactly how a firm’s tax liability is built up, step by step, the way you would compute it in an exam or in an actual return.

How a partnership firm’s taxation differs from an individual’s 🔗

A partnership firm, including a Limited Liability Partnership, is taxed at a flat 30 percent on its total income, regardless of how small or large that income is. There is no basic exemption limit and no slab system. There is also no rebate under Section 87A, which is available only to individuals. This means even a firm earning a modest profit pays tax from the very first rupee, unlike an individual who may pay nothing until income crosses the basic exemption threshold.

This flat structure is deliberate. The firm is treated as an independent taxable entity, distinct from its partners. Once the firm pays tax on its income, the partners’ share of that profit is exempt in their hands under Section 10(2A), because it has already suffered tax at the firm level. What the partners do pay tax on separately is any remuneration or interest they receive from the firm, since these are treated as the partners’ own business income.

Step 1: Arrive at the firm’s total income 🔗

Before any tax rate can be applied, the firm must first compute its total income. This starts with gross business receipts, from which allowable expenses, depreciation, and other permitted deductions are subtracted. One of the most important deductions specific to firms is remuneration and interest paid to partners, and this is where Section 40(b) comes in.

Remuneration and interest to partners: the Section 40(b) ceiling 🔗

A firm can deduct salary, bonus, or commission paid to working partners, but only within limits tied to the firm’s book profit, and only if the partnership deed authorises the payment. For FY 2025-26, the limits are:

Any remuneration paid beyond this ceiling is disallowed in the firm’s hands and added back to its taxable income, even though the partner has already received the money. Interest paid to partners on their capital is deductible too, but capped at 12 percent per annum simple interest; anything above that rate is disallowed. Since April 2025, firms must also deduct TDS at 10 percent under Section 194T on aggregate payments to a partner exceeding Rs. 20,000 in a year, a compliance step that is separate from, but closely linked to, the deduction question.

Once remuneration and interest within these limits are deducted, along with all other business expenses, what remains is the firm’s total income for tax purposes.

Step 2: Apply the applicable tax rates 🔗

With total income determined, the next step is applying rates. This is not always a single flat calculation, because different types of income within the same total can attract different rates.

The flat rate on normal business income 🔗

Ordinary business profits, interest income, rental income, and similar heads are taxed at the standard 30 percent rate applicable to firms.

Special rates for capital gains 🔗

Capital gains are computed and taxed separately from normal business income, using their own rates rather than the flat 30 percent. Following the changes introduced in the 2024 Budget, the current structure is:

These rate changes are significant enough to remember precisely. As the government’s own clarification notes, the rate for long-term capital gains on other assets under Section 112 was rationalised to 12.5 percent without indexation, replacing the earlier 20 percent with indexation. Similarly, short-term gains under Section 111A moved up from 15 percent to 20 percent, and the long-term rate under Section 112A rose from 10 percent to 12.5 percent, with the annual exemption threshold raised to Rs. 1.25 lakh, as confirmed in detailed guidance on Section 112A taxation. A firm computing its liability must therefore split its total income into normal income taxed at 30 percent and any special-rate capital gains taxed separately, then add the two tax amounts together before moving to the next step.

Step 3: Add surcharge, if the firm’s income crosses the threshold 🔗

Surcharge is an additional charge on the tax already computed, applicable only once income crosses a threshold. For firms, a 12 percent surcharge applies when total income exceeds Rs. 1 crore. Below that threshold, no surcharge applies at all.

Because this is a cliff-edge threshold rather than a slab, the law also provides marginal relief. Without it, a firm earning just above Rs. 1 crore could end up paying disproportionately more tax than one earning just below it. Marginal relief ensures that the additional tax payable because of crossing the threshold does not exceed the additional income earned beyond Rs. 1 crore. Separately, where the income includes capital gains taxed under Sections 111A, 112A, or 112, the surcharge on those specific gains is capped at 15 percent, even if the firm’s overall surcharge rate would otherwise work out higher.

Step 4: Add health and education cess 🔗

The final layer is cess, which is calculated on the tax plus surcharge, not on income directly. A 4 percent Health and Education Cess applies uniformly on the aggregate of tax and surcharge, regardless of the firm’s income level. Unlike surcharge, cess has no threshold; every firm pays it on its total tax liability.

Putting it all together: a worked example 🔗

Consider a firm, ABC & Co., with two working partners, for FY 2025-26.

• Book profit before remuneration: Rs. 60,00,000
• Allowable remuneration under Section 40(b): 90% of first Rs. 6,00,000 = Rs. 5,40,000, plus 60% of remaining Rs. 54,00,000 = Rs. 32,40,000, totalling Rs. 37,80,000, which the firm pays in full
• Business income after remuneration: Rs. 60,00,000 − Rs. 37,80,000 = Rs. 22,20,000
• Long-term capital gains under Section 112A from sale of listed shares: Rs. 5,00,000, less the Rs. 1,25,000 exemption = Rs. 3,75,000 taxable

Had the firm’s total income exceeded Rs. 1 crore, a 12 percent surcharge would have applied on the tax amount, subject to marginal relief, before cess was added on top. The order matters: normal income and special-rate income are taxed separately first, the two tax figures are added, then surcharge is layered on, and cess is calculated last on the combined total.

Don’t forget the Alternate Minimum Tax 🔗

Firms that claim certain deductions, such as those under Chapter VI-A, may end up with a regular tax liability that looks unusually low relative to their actual economic income. To prevent this, the Alternate Minimum Tax under Section 115JC applies whenever a firm’s regular tax is less than 18.5 percent of its adjusted total income. In such cases, the firm pays tax at 18.5 percent of adjusted total income instead, plus applicable surcharge and cess, and must obtain a certified report in Form 29C from a chartered accountant. This is a useful check to remember in exam answers: computing tax liability isn’t complete until you’ve confirmed the regular tax isn’t falling below the AMT floor.

Why this structured sequence matters 🔗

Each step in this computation exists for a reason. Separating capital gains from normal income prevents a firm from paying 30 percent on gains that the law specifically wants taxed lower. Surcharge and marginal relief keep the burden proportionate as income grows. Cess funds specific government programmes and applies uniformly so no firm, however small its profit, escapes it entirely. Followed in order, deduction of eligible remuneration and interest, application of rates by income type, surcharge where applicable, and cess last, this sequence gives an accurate, defensible tax liability figure, whether you are solving a numerical problem in an exam or preparing an actual return.

What do you think? If a firm’s book profit is exactly Rs. 6,00,000, does it make a real difference whether the deed fixes remuneration as a percentage of profit or as a flat amount within the Section 40(b) ceiling? And how might the shift from indexed to non-indexed long-term capital gains rates change the way firms plan the timing of asset sales?

References

1. https://www.incometax.gov.in/iec/foportal/help/partnership-firm-llp
2. https://taxguru.in/income-tax/enhanced-limits-partners-remuneration-section-40b-194t.html
3. https://www.pib.gov.in/PressReleasePage.aspx?PRID=2036604&reg=48&lang=2
4. https://cleartax.in/s/long-term-capital-gains-on-shares
5. https://www.taxmann.com/post/blog/tax-rates-surcharge-cess
6. https://www.caalley.com/cas-referencer/income-tax-rates-ay-2026-27-and-2025-26