Back to GST Law Library
CGST Act — Chapter V

Input Tax Credit — Sections 16 to 21 Explained

Complete breakdown of ITC provisions under the CGST Act. From eligibility conditions and blocked credits to ISD distribution and time limits — every section explained with practical implications for businesses.

6
Sections
12
Blocked Items
36-45
Key Rules
7+
Amendments

Section-wise Analysis

§16

Eligibility & Conditions for ITC

High Litigation

The Foundation Section

  • Taxpayer must possess tax invoice or debit note
  • Goods/services must be received by the taxpayer
  • Tax must be actually paid to the Government by the supplier
  • Return (GSTR-3B) must be filed claiming the ITC
  • Payment to supplier within 180 days — else ITC reversed with interest
  • ITC available only if reflected in GSTR-2B (auto-populated)
  • Credit restricted to invoices uploaded by suppliers in GSTR-1

Recent Amendment: Section 16(4) amended: Time limit extended to 30th November of following year or date of filing annual return, whichever is earlier

§17

Apportionment & Blocked Credits

High Litigation

Most Litigation-Prone Section

  • Section 17(1): ITC only for business-purpose supplies
  • Section 17(2): Partial credit when taxable + exempt supplies exist
  • Section 17(3): Value of exempt supplies includes RCM, securities, land
  • Section 17(5): BLOCKED CREDITS — motor vehicles, food, health insurance, personal use, construction of immovable property, gifts >₹50k
  • Exception to motor vehicle block: transport business, driving schools, further supply
  • Exception to food block: outdoor catering obligated under employment law

Recent Amendment: Clarification: CSR expenditure ITC is blocked under Section 17(5)(h) as per CBIC circular

§18

Availability of Credit in Special Circumstances

Transition & Conversion Credit

  • 18(1)(a): New registration — credit on inputs held in stock on registration date
  • 18(1)(b): Voluntary registration — same as above
  • 18(1)(c): Composition to regular — credit on stock held on conversion date
  • 18(1)(d): Exempt to taxable — credit on stock held on date supply becomes taxable
  • 18(3): Transfer of credit on sale/merger/amalgamation of business
  • 18(4): Taxable to exempt switch — ITC reversal on stock + capital goods required
  • 18(6): ITC on capital goods — reduced by 5% per quarter or part thereof of useful life

Recent Amendment: Rule 44A introduced for ITC reversal on capital goods in case of supply becoming exempt

§19

Taking Input Tax Credit for Capital Goods

Depreciation & Credit Interaction

  • If depreciation claimed on tax component under IT Act, ITC not available on that portion
  • Full ITC on capital goods available in the month of receipt (no installment rule in GST)
  • Reversal required under Rule 43 for common capital goods used for taxable + exempt
  • Useful life of capital goods: 5 years (60 months) for reversal calculations
  • Capital goods sent for job work — ITC available if returned within 3 years

Recent Amendment: No major amendment post-2020

§20

Distribution of ITC by ISD

High Litigation

Input Service Distributor Mechanism

  • ISD distributes ITC of input services + capital goods received at its office
  • Distribution pro-rata based on turnover of recipient units in the state
  • ISD must issue ISD invoice (not regular tax invoice)
  • Cannot distribute ITC on input goods — only services and capital goods
  • Effective April 2025: ISD registration mandatory for all multi-state businesses
  • Cross-charge mechanism replaced by ISD for inter-unit service distribution

Recent Amendment: Mandatory ISD registration effective 01 April 2025 — all inter-branch service distributions must go through ISD

§21

Manner of Distribution

Rules for ISD Credit Distribution

  • Credit distributed ≤ credit available (cannot exceed)
  • Credit of CGST distributed as CGST, SGST as SGST, IGST as IGST
  • If recipient and ISD in same state: distribute as CGST + SGST/UTGST
  • If recipient in different state: distribute as IGST
  • Excess distribution recoverable from recipient with interest
  • Reduction in credit: issue ISD credit note to reduce distributed credit

Recent Amendment: Aligned with mandatory ISD provisions from April 2025

Section 17(5) — Blocked Credits

These items are specifically blocked from ITC, regardless of business use (with limited exceptions)

Motor vehicles & conveyances

Exception: Used for transport of persons (≥13 seats), transportation of goods, making taxable supply of such vehicles, driving training

Food & beverages, outdoor catering

Exception: Obligatory under any law for the time being in force, or inward supply used for outward taxable supply of same category

Beauty treatment, health services, cosmetic/plastic surgery

Exception: Inward supply used for outward taxable supply of same category, or obligatory under law

Club memberships, fitness

Exception: Used for making outward taxable supply of same category

Rent-a-cab, life/health insurance

Exception: Government obligation or outward taxable supply of same category; effective Oct 2024: health insurance for employees covered under ESI may be claimable

Travel benefits to employees on vacation (LTC)

Exception: None — fully blocked

Works contract for construction of immovable property (except plant & machinery)

Exception: Used for further supply of works contract service

Construction of immovable property on own account

Exception: Plant & machinery are NOT blocked — ITC available

Composition scheme taxpayers

Exception: None — composition dealers cannot claim any ITC

Personal consumption

Exception: None — fully blocked

Goods lost, stolen, destroyed, written off, gifted (free samples >₹50k)

Exception: Insurance claim settled — ITC available if insurer settles the claim

Tax paid under Section 74/129/130 (fraud/detention/confiscation)

Exception: None — fully blocked

ITC Regime Evolution

July 2017

GST launch — ITC available on self-declaration basis

Oct 2019

Rule 36(4): 20% cap on ITC not reflected in GSTR-2A

Jan 2021

Cap reduced to 5% provisional ITC

Jan 2022

Section 16(2)(aa): ITC only if reflected in GSTR-2B

Oct 2022

No provisional ITC — 100% matching with GSTR-2B required

Apr 2025

Mandatory ISD registration for multi-state businesses

FY 2025-26

Section 16(4) time limit relaxation for FY 2017-18 to 2020-21 claims

Frequently Asked Questions

What are the four conditions for claiming ITC under Section 16?

Four mandatory conditions: (1) Possession of valid tax invoice/debit note, (2) Receipt of goods/services, (3) Tax actually paid to Government by supplier, and (4) Furnishing of return (GSTR-3B). Additionally, from 2022, the invoice must be reflected in GSTR-2B and payment must be made to supplier within 180 days.

What is the time limit for claiming ITC?

Under Section 16(4), ITC for any financial year must be claimed by the earlier of: (a) 30th November of the following financial year, or (b) the date of filing annual return (GSTR-9). For example, ITC for FY 2025-26 must be claimed by 30 November 2026 or GSTR-9 filing date, whichever is earlier.

Can ITC be claimed on motor vehicles?

Generally blocked under Section 17(5)(a). However, ITC IS available for: (1) vehicles with seating capacity >13 persons, (2) vehicles for transportation of goods, (3) vehicles for imparting training on driving, (4) vehicles held for further supply (car dealers), and (5) vehicles for transportation of passengers (taxi services).

What happens if payment is not made to supplier within 180 days?

Under the second proviso to Section 16(2), if payment is not made within 180 days from invoice date, the ITC claimed must be reversed and added to output tax liability along with interest at 18% p.a. The credit is re-available once payment is eventually made to the supplier.

Is ITC available on construction of immovable property?

No. Section 17(5)(c) and (d) block ITC on works contract services and goods/services used for construction of immovable property on own account. However, 'plant and machinery' is explicitly excluded from this restriction — ITC on plant & machinery is fully available.

What is ISD and when is it mandatory?

Input Service Distributor (ISD) is a mechanism under Sections 20-21 for distributing ITC of input services received at the head office to branch offices in proportion to turnover. From April 2025, ISD registration is MANDATORY for all businesses with multiple GSTINs if they receive common input services at one location and need to distribute credit.

Maximize Your ITC with Automated Matching

LaabamOne auto-reconciles your GSTR-2B, flags blocked credits, and ensures you never miss eligible ITC claims.

Start 21-Day Free Trial