safely discharge the burden of proof under Income Tax & GST laws.

comprehensive checklist that a small/medium business in India should maintain to safely discharge the burden of proof under Income Tax & GST laws.


  • The department does not have to prove that the expense is false — it’s the assessee who must prove that it is genuine.

⚖️ Judicial Support

  • CIT v. Calcutta Agency Ltd. (1951) – The Supreme Court held that the onus is on the assessee to prove the claim of expenditure.

📑 Checklist of Documents to Justify Expenses

1. Purchases & Raw Materials

  • Tax Invoices from suppliers (with GSTIN, HSN/SAC, description).

  • E-way bills for movement of goods (if applicable).

  • Goods receipt notes, delivery challans.

  • Payment proof → bank transfer/cheque/UPI records.

  • Supplier agreements / purchase orders.


2. Sales & Revenue

  • Sales tax invoices with GSTIN.

  • E-way bills for dispatch.

  • Customer agreements / work orders.

  • Proof of receipt of payment (bank statement, UPI, etc.).


3. Labour & Wages

  • Wage register (Form D in some states).

  • Attendance/biometric records.

  • Salary slips.

  • EPF/ESI challans (if applicable).

  • Payment proof (bank transfer preferred; if cash → wage register signed/thumb impression).


4. Transport & Travel

  • Lorry receipts / consignment notes.

  • Vehicle number details, GPS logs (if available).

  • Toll receipts, fuel bills.

  • Tickets, boarding passes, hotel bills.

  • Internal travel claims → attach self-made voucher + reason + approval + mode of payment.


5. Rent, Repairs, Utilities

  • Rent agreement with landlord + PAN of landlord (if TDS applicable).

  • Rent receipts.

  • Electricity/water/telephone bills.

  • AMC contracts, repair bills with GST.


6. Professional & Service Expenses

  • Agreements / engagement letters with consultants.

  • Tax invoice with GST (if registered).

  • TDS deducted & Form 16A issued.

  • Payment proof (bank transfer).


7. Petty Cash / Self-Made Vouchers

  • Maintain Petty Cash Register (date-wise).

  • Each voucher must have:
    ✅ Date, Amount, Purpose, Name & Signature of recipient, Approval of manager.

  • Attach any available supporting slip (parking ticket, small bill, etc.).

  • Limit cash expenses to ₹10,000/day per party (as per Sec. 40A(3)).


8. Fixed Assets

  • Tax invoice with GST (if eligible).

  • Proof of payment.

  • Asset register (with depreciation details).

  • Installation/AMC records.


9. GST-Specific

  • GSTR-2B reconciliation with purchase invoices.

  • GSTR-1 & GSTR-3B returns filed on time.

  • Proper HSN/SAC coding.

  • ITC availed only on eligible invoices.


10. Income Tax-Specific

  • TDS deducted & deposited (Form 26Q).

  • Proof of statutory payments (PF, ESI, GST, Income Tax, Professional Tax).

  • Form 26AS & AIS reconciliation with books.

  • Loan/interest agreements with banks/creditors.


Golden Rule:
If an expense does not have third-party evidence, strengthen it with:

  • Internal voucher + approval trail,

  • Payment proof,

  • Business justification note.


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