The Real Problem: You Pay, Your Partner Doesn't
Imagine this. You and a business partner borrow ₹1 lakh from the bank together. The money is split: you take ₹50,000, your partner takes ₹50,000. You both sign a joint promissory note—meaning the bank can chase either of you for the full amount.
It's a common arrangement in Indian business. Banks lend more freely when two people are on the hook. The interest rate is lower. Everyone wins. Until your partner becomes bankrupt and disappears.
Now you owe the bank ₹1 lakh plus interest. Your partner owes nothing. You have to pay it all. Can you tell the tax department: "This is a business loss—let me deduct it from my profits"?
The tax officer said no in 1950. But Jagannath Kissonlal, a commission agent in Bombay, fought all the way to the Supreme Court. He won. Here's why that matters.
What Happened in This Case
On September 26, 1949, Jagannath Kissonlal's firm borrowed ₹1,00,000 from the Bank of India. The money came on a joint and several liability note signed by Kissonlal and one Kishorilal.
Half went to Kissonlal's business. Half went to Kishorilal. But Kishorilal went bankrupt and couldn't pay. Kissonlal had to pay the entire amount—₹1,00,000 with interest.
Later, Kishorilal's official assignee (bankruptcy trustee) managed to recover and pay back ₹18,805. That left ₹31,740 still unpaid by Kishorilal.
Kissonlal claimed this ₹31,740 as a business loss and deducted it from his taxable income. The income tax officer rejected it. So did the assistant commissioner on appeal. The Income Tax Appellate Tribunal (ITAT) agreed with Kissonlal. The tax department appealed to the Bombay High Court—and lost again. Finally, the tax department took it to the Supreme Court.
Why the Supreme Court Sided With the Business Owner
The court faced two questions: Did Kissonlal have the right to claim this loss under Section 10(2)(xv) of the Income-Tax Act? Was this a business loss at all?
The Supreme Court's bench—led by Justice Kapur—said yes to both. The key finding: this was standard commercial practice in Bombay.
The Tribunal had carefully documented the practice. When two business people need ₹50,000 each but the bank won't lend to one person alone, they borrow ₹1,00,000 together on joint liability. They split the money. The bank gets better security. The borrowers get lower interest rates. Everyone's incentive is aligned—if one defaults, the other has to pay.
This mutual responsibility is what the court called "mutuality." Because of this mutuality, losing money when your partner defaults isn't just bad luck. It's a genuine business loss, the same way you'd lose money if a customer refused to pay for goods you sold them on credit.
The Court rejected a similar case (Madan Gopal Bagla) where the taxpayer had borrowed money with a partner but couldn't prove that such joint borrowing was actually customary in his business. Bagla lost because there was no mutuality—no established practice, no lower interest benefit, no reason the loss should be business-related rather than personal.
But in Kissonlal's case, the evidence was clear. Joint borrowing was how Bombay's commission agents financed their operations. The loss followed directly from that practice. So the loss was deductible.
What This Means for You
If you're in a business partnership or a registered firm, this case protects you in specific ways:
Joint borrowing has legal standing. If your trade or industry relies on joint loans (common in trading, brokering, and commission businesses), the tax department can't simply reject losses from a partner's default without looking at the facts.
You need to prove the practice is real. You can't just claim joint borrowing is normal. You have to show it's actually how your industry works—lower rates, common among similar businesses, documented.
Mutuality matters. The court wants to see that both parties benefited from the arrangement while it lasted, and that you both stood surety for each other's portion of the loan. That's what makes it business-related and not just a personal misadventure.
This case also sends a message to tax authorities: when a loss arises from a commercially established practice, and the taxpayer can show it, the revenue department can't dismiss it as personal loss simply because the co-borrower was dishonest or insolvent.
Why It Still Matters Today
This judgment, reported as The Commissioner of Income-Tax, Bombay City I v. M/S Jagannath Kissonlal, Bombay, [1961] 2 S.C.R. 644 (decided November 24, 1960), remains binding law.
Assessment procedures have changed since 1960. Penalties have changed. But the principle endures: when you can prove a loss arises from a legitimate commercial custom, and there's mutuality between the parties, the tax department must allow it.
If you're facing a rejection of a similar deduction today, this case gives you ammunition. Your tax advocate can cite it. The tribunal must reckon with it. It's Supreme Court precedent.
The only catch: you have to prove your case just as carefully as the Tribunal found the facts in Kissonlal's favor. Vague claims won't work. You need evidence—bank records, industry testimony, the documented practice of your trade.