Tax Deducted at Source (TDS) is a mechanism used by both the Income Tax department and the GST department to prevent tax evasion and establish an audit trail. But when an invoice lands on your desk, do you deduct TDS under Income Tax, TDS under GST, or both?
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1. The Basic Concept
Income Tax TDS (e.g., Section 194C for contractors, 194J for professionals) is an advance tax collected on behalf of the deductee's final income tax liability.
GST TDS (Section 51 of the CGST Act) is entirely different. It is generally applicable only to Government agencies, Local Authorities, and Public Sector Undertakings (PSUs). It is deducted at 2% (1% CGST + 1% SGST) to track large government contracts.
2. Key Differences at a Glance
| Feature | TDS under Income Tax | TDS under GST (Section 51) |
|---|---|---|
| Who must deduct? | Almost all businesses (companies, LLPs, tax-audit individuals). | Govt departments, PSUs, Local authorities. (Rarely private entities). |
| Applicability | Specified payments: Rent, Commission, Professional fees, Contracts. | Taxable supply of goods or services exceeding ₹2,50,000 under a single contract. |
| Rate of TDS | Varies by section (1% to 10%). | Flat 2% (1% CGST + 1% SGST or 2% IGST). |
| Base Value for Deduction | Value excluding the GST component (per CBDT circular). | Value excluding the GST component (per CGST Act). |
3. The Double Deduction Scenario
If a private contractor provides services to a Government entity, both TDS provisions trigger simultaneously.
For example, if you provide ₹3,000,000 of taxable services to a PSU. The PSU will:
- Deduct 2% TDS under GST (Section 51).
- Deduct 2% TDS under Income Tax (Section 194C).
Crucial Rule: Both deductions must be calculated on the base value of the invoice, excluding the GST charged on the invoice.
4. Claiming the Credit
The mechanism for claiming back these deducted amounts differs completely:
- Income Tax TDS: Reflects in your Form 26AS / AIS. You claim it against your final Income Tax liability when filing your annual ITR.
- GST TDS: The deductor files GSTR-7. The deducted amount flows directly into your Electronic Cash Ledger on the GST portal. You can use this cash balance to pay your monthly GSTR-3B liability, or claim it as a direct bank refund.
Need a Quick Calculation?
Manually calculating the net payable amount when both TDS provisions apply can lead to accounting errors. Use our TDS & GST Net Payable Calculator to generate accurate payment breakdowns for your vendors.
Conclusion
While they share the same name ("Tax Deducted at Source"), Income Tax TDS and GST TDS are entirely parallel systems. Understanding when each applies—and ensuring they are calculated strictly on the base taxable value excluding taxes—will prevent compliance headaches and working capital blockages.