Business Deductions — Why They Matter
Your taxable business income = Revenue − Allowable Expenses. Every legitimate business expense you claim reduces your tax bill. But "legitimate" has a specific legal meaning — Section 37(1) of the Income Tax Act lays it out, and the Assessing Officer (AO) follows that letter strictly.
This guide walks through what you can deduct, what you can't, and the rules that trip up most small businesses.
The General Rule (Section 37(1))
An expense is deductible if it satisfies ALL these conditions:
- It is not capital in nature.
- It is not personal in nature.
- It is not specifically disallowed by any other section.
- It is incurred wholly and exclusively for business or profession.
- It is incurred in the previous year (the year for which you're computing income).
Common Allowable Business Deductions
1. Rent for business premises
Office, factory, godown, or shop rent is fully deductible. Remember to deduct TDS u/s 194I if annual rent exceeds ₹2,40,000.
2. Salaries & wages
Salaries to employees, including bonus, leave encashment, gratuity contributions, and PF/ESI employer contributions. Important: if you don't deduct TDS u/s 192 (on salary above exemption), 30% of the salary expense is disallowed under Sec 40(a)(ia).
3. Repairs & maintenance
Routine repairs to premises, machinery, vehicles, furniture. Note: major renovations that improve the asset's life are capital expenses — not directly deductible, claim depreciation instead.
4. Electricity, water, telephone, internet
Fully deductible if used for business. If your office is at home, you can claim a proportionate share — keep documentation to defend the split (e.g., area used or hours used).
5. Professional fees
CA fees, lawyer's fees, consultant fees, audit fees. Deduct TDS u/s 194J if annual payment to one professional exceeds ₹30,000.
6. Travel & conveyance
Business travel: tickets, hotel, taxis, food during travel — fully deductible. Personal travel — not deductible. Mixed trip — claim the business portion only, keep proof.
7. Vehicle expenses
Fuel, insurance, repairs, driver salary, and depreciation on the vehicle — deductible to the extent used for business. If you use your car 70% for business, claim 70% of expenses and 70% of depreciation. Keep a logbook.
8. Office supplies & stationery
Pens, paper, printer cartridges, postage, courier. Small consumables — straightforward.
9. Software subscriptions
SaaS like accounting software, design tools, hosting fees, cloud storage. Annual subscriptions are typically revenue expenses, fully deductible in the year of payment.
10. Marketing & advertising
Google Ads, Facebook Ads, social media, signboards, brochures, website development. All fully deductible. Note: Sec 194-O may apply to payments to digital platforms in some cases.
11. Interest on business loans
Interest paid on loans taken for business — bank, NBFC, or even private loans (with proper documentation and TDS if applicable) — fully deductible.
12. Bank charges & commission
Cheque return charges, processing fees, NEFT/RTGS charges, credit card processing fees, payment gateway fees — all deductible.
13. Insurance premiums
Fire insurance on godown, marine on stock-in-transit, vehicle insurance, professional indemnity — all deductible. Key-man insurance also deductible in specific cases.
14. Depreciation on assets
Fixed assets like computers, furniture, machinery, vehicles — claim depreciation at Income Tax Act rates (not Companies Act rates). See our depreciation tutorial.
15. Bad debts written off
If a customer doesn't pay despite reasonable effort, write off the receivable and claim the loss. The debt must have been previously credited to revenue.
Commonly Disallowed Expenses
| Expense | Section | Why Disallowed |
|---|---|---|
| Income tax / TDS paid | 40(a)(ii) | It is the tax itself — not allowed as deduction |
| Wealth tax | 40(a)(iia) | Personal tax, not business expense |
| Cash payment > ₹10,000 (single) | 40A(3) | To curb cash transactions; ₹35,000 for transporters |
| Personal drawings | 37(1) | Personal, not business |
| Donations (covered separately) | 37(1) | Claim under Sec 80G, not as business expense |
| Penalties & fines | 37(1) Expln | For breach of law — not deductible |
| Capital expenditure | 37(1) | Claim via depreciation instead |
| Provision for unascertained liabilities | — | Contingent liabilities not allowed |
| Expenses without TDS deduction | 40(a)(ia) | 30% disallowed if TDS not deducted/paid |
| Salary to working partner — beyond limit | 40(b) | Limits apply for partnership firms |
The ₹10,000 Cash Payment Rule (Sec 40A(3))
If you pay any single party more than ₹10,000 in cash in one day for any expense, the entire payment is disallowed. Not just the excess — the whole amount.
Exceptions: Salary up to ₹50,000 in cash; payments to government; payments where banking is impossible (specified rural cases). Goods carriage transporters get a ₹35,000 limit instead of ₹10,000.
What Documentation You Need
Every claimed expense must be supported by:
- Bill or invoice showing vendor name, GSTIN, date, description, amount.
- Payment proof — bank statement, cheque counterfoil, UPI ref, or cash voucher with vendor signature.
- Business purpose link — for ambiguous items (lunch, taxis, gifts), a one-liner narration.
- TDS challan if applicable, plus the TDS return acknowledgement.
Keep these for at least 6 years from the end of the assessment year. The Income Tax Department can reopen assessments for that long under Sec 148/148A.
Don't Confuse Business Deductions with Chapter VI-A
Business deductions reduce the income before arriving at "Gross Total Income". Chapter VI-A deductions (80C, 80D, 80G, etc.) reduce taxable income after GTI is computed.
| Where Claimed | Examples |
|---|---|
| Business income computation (Sec 28-44) | Rent, salary, repairs, depreciation, professional fees |
| Chapter VI-A (Sec 80C onward) | LIC premium, PPF, ELSS, mediclaim, donations, NPS |
Year-End Deductions Checklist
- All vendor invoices collected and recorded
- Bank statement reconciled with books
- TDS deducted on rent, professional fees, contractor payments
- TDS deposited and returns filed
- No cash payments above ₹10,000 per party per day
- Depreciation computed at Income Tax Act rates
- Personal expenses excluded
- Capital expenses (assets) NOT debited to P&L
- Bad debts identified and written off (with proof of effort to recover)
- Provisions reversed where they were unascertained