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Section 51 · CGST Act 2017

TDS on GST Calculator

Calculate 2% TDS on GST for government entities, PSUs, and local authorities. Accurate TDS on GST calculation for intrastate and interstate contracts with instant breakdown.

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TDS on GST — Key Rules (Section 51)

  • •Threshold: Applies only if contract value exceeds ₹2,50,000 (excluding GST).
  • •Rate: 2% total — 1% CGST + 1% SGST (intrastate) or 2% IGST (interstate).
  • •Who deducts: Central/State Govt., Local Authorities, PSUs, and notified entities.
  • •Filing: Deductor must file GSTR-7 by 10th of the following month.
  • •TDS Certificate: Form GSTR-7A available on GST portal. Amount credits to supplier's Cash Ledger.
  • •Late deposit interest: 18% p.a. from date of deduction to date of deposit.

TDS Calculation Result

Taxable Value (Excl. GST)₹ 5,00,000.00
GST Amount (18%)₹ 90,000.00
TDS — CGST (1%)₹ 5,000.00
TDS — SGST (1%)₹ 5,000.00
Total TDS to Deposit₹ 10,000.00
Gross Invoice Amount₹ 5,90,000.00
Net Payable to Supplier₹ 5,80,000.00
✓ Supplier Cash Ledger Credit

The deducted TDS amount reflects in the supplier's GSTR-7 return on the GST portal. Once accepted, it credits directly into their Electronic Cash Ledger for tax payment or refund.

⚠ Disclaimer: Calculations are for reference and educational purposes only. Verify with the official GSTN portal or consult a Chartered Accountant before filing Form GSTR-7.

Understanding TDS on GST Under Section 51 of the CGST Act

TDS on GST (Tax Deduction at Source under Goods and Services Tax) is a statutory compliance mechanism governed by Section 51 of the Central Goods and Services Tax (CGST) Act, 2017. Under this provision, designated government bodies, local authorities, and public sector undertakings (PSUs) must deduct a percentage of tax at source when releasing payments to suppliers for taxable supplies of goods or services.

The primary intent of introducing TDS on GST is to establish an unalterable audit trail for government procurement while facilitating early tax collection. By requiring deductors to deduct tax at source, the GST framework ensures robust compliance among commercial vendors and enables seamless reconciliation between vendor sales and government procurement records.

Our free tds on gst calculator enables finance teams, contractors, and suppliers to perform fast, error-free tds on gst calculation, check contract thresholds, and verify the exact tds on gst amount deductible on any invoice.

How TDS on GST Calculation Works: Rates & Threshold Rules

Accurate tds on gst calculation depends on three statutory parameters defined under Section 51:

  • •Contract Threshold (> ₹2,50,000): TDS on GST applies only if the total taxable value under a single supply contract exceeds ₹2.5 Lakhs (excluding taxes). If the contract value is ≤ ₹2,50,000, no TDS is deductible.
  • •Intrastate Deduction Rate (2%): When the supplier and place of supply are in the recipient's state, 1% CGST + 1% SGST are deducted.
  • •Interstate Deduction Rate (2%): For interstate supplies, the full 2% deduction is made under Integrated GST (IGST).

Critical Base Value Rule: TDS is computed strictly on the taxable value of the supply. It must never be deducted on the GST components (CGST, SGST, IGST, or cess) indicated on the invoice.

Practical Examples: Computing the TDS on GST Amount

Here is how the tds on gst calculator computes the deductible tds on gst amount across common scenarios:

Scenario A: Exclusive of GST (Intrastate)

Taxable Contract Value: ₹5,00,000 | GST Rate: 18%

  • Base Taxable Value: ₹5,00,000
  • GST (18%): ₹90,000
  • Invoice Total: ₹5,90,000
  • TDS (2%): ₹10,000 (₹5,000 CGST + ₹5,000 SGST)
  • Net Payable to Supplier: ₹5,80,000

Scenario B: Inclusive of GST (Interstate)

Gross Contract Price: ₹5,90,000 (incl. 18% IGST)

  • Taxable Value: ₹5,90,000 / 1.18 = ₹5,00,000
  • Extracted IGST: ₹90,000
  • TDS (2% IGST): ₹10,000
  • Net Released to Vendor: ₹5,80,000

Who Must Deduct TDS on GST & When Does the Exemption Apply?

Under Section 51(1) of the CGST Act, deduction of TDS on GST is mandatory for:

  • ✓Central and State Government departments and establishments
  • ✓Local authorities (Municipal corporations, Panchayats, Cantonment boards)
  • ✓Governmental agencies set up by Parliament or State Legislatures
  • ✓Public Sector Undertakings (PSUs) and societies established by Government

⚠ Proviso to Section 51(1): No TDS on Inter-State Recipient Mismatch

No TDS is deducted when the location of the supplier and the place of supply are in a different State or UT from the State/UT of registration of the recipient. In this case, the supplier levies intra-state CGST + SGST of their state, which the recipient cannot deposit in their own state.

🧮 Practical Statutory Example

Worked Example: Section 51 TDS on Government IT Contract

Section 51 CGST Act

Consider an IT infrastructure vendor in Lucknow, Uttar Pradesh awarded a hardware maintenance contract of ₹6,00,000 (excluding GST) by the State Urban Development Authority (a local government department in UP).

Taxable Base (Excl. GST)

₹6,00,000

Exceeds statutory ₹2.5 Lakh threshold
TDS Deducted (2%)

₹12,000

1% CGST (₹6,000) + 1% SGST (₹6,000)
Net Payment to Vendor

₹6,96,000

Gross ₹7.08L invoice minus ₹12,000 TDS

Statutory Deduction & Credit Process

  1. Tax Computation: Vendor bills ₹6,00,000 base + 18% GST (₹1,08,000) = ₹7,08,000 gross invoice.
  2. TDS Base Exclusion Rule: TDS is computed strictly on the base taxable value of ₹6,00,000, excluding the ₹1,08,000 GST component (Explanation to Section 51(1)).
  3. Deposit by Department: The government authority deposits ₹12,000 via Form GSTR-7 by the 10th of the following month.
  4. Credit to Vendor's Cash Ledger: Upon accepting the GSTR-7 entry on the GST common portal, ₹12,000 is directly credited to the vendor's Electronic Cash Ledger, which can be utilized to settle future output tax or claimed as cash refund.

How to Use This Free TDS on GST Calculator Online

Follow these quick steps to complete your tds on gst calculation:

  1. 1
    Enter Contract Value: Input the contract or invoice amount. A notice appears if the value is ≤ ₹2,50,000.
  2. 2
    Select Value Type: Choose Exclusive of GST or Inclusive of GST depending on your quotation.
  3. 3
    Select GST Rate & Supply Type: Choose the applicable GST rate (5%, 12%, 18%, 28%) and toggle Intrastate or Interstate.
  4. 4
    View Results: Instantly check the base value, GST, TDS split, total tds on gst amount, and net payable.

GSTR-7 Filing, Form GSTR-7A & Supplier Credit Process

Deducting entities must fulfill statutory return filing and credit transmission requirements under the GST framework:

Form GSTR-7 Filing

Deductors must file monthly return Form GSTR-7 by the 10th of the following month. The deducted TDS must be deposited via the Electronic Cash Ledger.

GSTR-7A Certificate

After GSTR-7 filing, Form GSTR-7A certificate is generated on the GST portal for the supplier, confirming the deducted tax details.

Electronic Cash Ledger Credit

The deducted amount reflects in the supplier's TDS/TCS Credit Received tab. Upon acceptance, it credits directly to their Electronic Cash Ledger.

Late Deposit Interest & Fees

Delayed payment attracts 18% p.a. interest under Section 50, and late return filing attracts statutory late fees under Section 47.

Comparison: TDS on GST (Section 51) vs. Income Tax TDS

FeatureTDS on GSTIncome Tax TDS
Governing ActSection 51, CGST Act 2017Income Tax Act 1961 (194C, 194J)
Deduction RateFlat 2% (1% CGST + 1% SGST or 2% IGST)1% to 10% depending on section
Threshold Limit> ₹2,50,000 per contract₹30,000 single / ₹1,00,000 aggregate
Credit FormGST Electronic Cash LedgerForm 26AS / AIS for Income Tax
Return FormForm GSTR-7 (Monthly by 10th)Form 26Q (Quarterly by 31st)

Frequently Asked Questions on TDS on GST & Section 51

TDS on GST is calculated strictly on the taxable value (base price) of goods or services under the contract, excluding the GST components (CGST, SGST, IGST, and cess). Under Section 51 of the CGST Act, the total deduction rate is 2%. For intrastate transactions, it is deducted as 1% CGST + 1% SGST. For interstate transactions, it is deducted as 2% IGST. For example, if a taxable contract value is ₹5,00,000 with 18% GST (total invoice value of ₹5,90,000), TDS on GST is calculated as 2% of ₹5,00,000 = ₹10,000 (not on ₹5,90,000). The net amount paid to the supplier is ₹5,80,000.
2% TDS on GST is the mandatory tax deduction at source prescribed under Section 51 of the CGST Act, 2017. When specified government departments, agencies, local authorities, or PSUs award taxable supply contracts exceeding ₹2.5 Lakhs, they are required by law to deduct 2% of the taxable value before releasing payment to the vendor. For intrastate supplies, the 2% is divided equally into 1% CGST and 1% SGST. For interstate supplies, the entire 2% is deducted as IGST. The deducted tax is remitted to the government and credited to the supplier's GST Electronic Cash Ledger via Form GSTR-7.
TDS for GST (Tax Deduction at Source under GST) is a tax compliance mechanism introduced under Section 51 of the Central Goods and Services Tax (CGST) Act, 2017. It mandates that designated entities—primarily Central and State Government departments, local authorities, governmental agencies, and Public Sector Undertakings (PSUs)—deduct 2% tax at source on payments made to suppliers for taxable supplies where the individual contract value exceeds ₹2,50,000 (excluding GST). Its primary objective is to create an audit trail for government procurements, curb tax evasion, and ensure timely compliance by contractors and vendors.
No, TDS is not applicable on all GST transactions. TDS under Section 51 applies only when: (1) The buyer/recipient is a notified entity (such as Central/State Government departments, local authorities, governmental agencies, or PSUs); (2) The total taxable value of supply under a single contract exceeds ₹2,50,000 (excluding GST); and (3) The supply is taxable (exempt supplies do not attract TDS). Furthermore, TDS is specifically NOT applicable in private B2B or B2C transactions between normal businesses, nor when the location of the supplier and the place of supply are in a different State or Union Territory from the State/UT of registration of the recipient (as per the proviso to Section 51(1)).
When the taxable value of supply under a single contract exceeds ₹2.5 Lakhs (₹2,50,000 excluding GST), the deductor must deduct TDS on GST at a rate of 2% on the total taxable value. For intrastate supplies, 1% CGST (₹1,000 per ₹1 Lakh) and 1% SGST (₹1,000 per ₹1 Lakh) are deducted. For interstate supplies, 2% IGST (₹2,000 per ₹1 Lakh) is deducted. For example, on a contract of ₹3,00,000 taxable value, the TDS deducted is ₹6,000 (₹3,000 CGST + ₹3,000 SGST, or ₹6,000 IGST). If the total contract value is exactly ₹2,50,000 or less, zero TDS is deducted.
As a supplier or vendor, you do not pay TDS on GST out of pocket; instead, the government entity or PSU (the deductor) withholds 2% from your invoice payment and deposits it directly with the government on your behalf. The deductor then files Form GSTR-7 by the 10th of the following month, after which the deducted amount appears in your GST portal under 'TDS and TCS Credit Received'. Once you accept this credit, the amount is automatically added to your Electronic Cash Ledger, which you can use to pay your output GST liability or claim as a cash refund if unutilized. On the other hand, if you are a designated government deductor, you are legally required to deduct and pay this 2% TDS to the government via GSTR-7.

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