Input Tax Credit on Common Credit Under GST
Quick Summary
- Common credit means ITC on inputs, input services, or capital goods used for both taxable and exempt supplies, or for both business and non-business purposes.
- Section 17(1) restricts ITC when goods or services are used partly for business and partly for non-business purposes.
- Section 17(2) restricts ITC when goods or services are used partly for taxable supplies, including zero-rated supplies, and partly for exempt supplies.
- Rule 42 applies to inputs and input services.
- Rule 43 applies to capital goods and spreads the common capital goods credit over 60 months.
- Zero-rated supplies such as exports and eligible SEZ supplies are not treated as exempt for ITC reversal.
- Section 17(5) blocked credits are removed before the common credit is calculated.
- The Rule 42 annual true-up must be completed no later than the September return following the financial year.
- Banking companies, financial institutions, and eligible NBFCs can choose the 50% ITC option under Section 17(4).
- Rule 42, Rule 43 and Section 17(5) non-reclaimable reversals should be reported in GSTR-3B Table 4(B)(1).
What Is Common Credit Under GST?
Common credit is the Input Tax Credit that relates to goods or services used for mixed purposes. This usually happens in two situations. First, the same input, service or expense supports both taxable and exempt supplies. Second, the same item is used partly for business and partly for non-business or personal purposes.
A business cannot claim full ITC in such cases. GST law allows ITC only to the extent it is linked to taxable business supplies, including zero-rated supplies such as exports and eligible SEZ supplies. The remaining portion must be reversed.
For instance, a retailer buys 10 refrigerators for ₹10,00,000 plus 18% GST of ₹1,80,000. 9 refrigerators are sold as taxable goods. One refrigerator is taken home by the owner for personal use. The GST on the personal-use refrigerator is not claimable. Therefore, ₹18,000 must be excluded, and only ₹1,62,000 can be treated as eligible ITC.
Book A Demo
Legal Basis for Common Credit
Section 17(1) - Business vs Non-Business Use
When goods or services are used partly for business and partly for other purposes, ITC is restricted to the portion used for business.
This covers situations such as office assets, vehicles, utilities, or shared services used partly for business and partly for personal or non-business purposes.
Section 17(2) - Taxable vs Exempt Supplies
When goods or services are used partly for taxable supplies, including zero-rated supplies, and partly for exempt supplies, ITC is restricted to the portion attributable to taxable supplies. This is the main legal base for common credit reversal.
What Counts as Exempt Supply for ITC Apportionment?
For ITC reversal, the exempt supply is wider than normal GST-exempt goods or services. Section 17(3) expands the value of exempt supply for Section 17(2) apportionment.
| Category | Treatment |
|---|---|
| Exempt supplies | Supplies fully exempt under GST |
| Nil-rated supplies | Supplies attracting nil GST rate |
| Non-taxable supplies | Supplies outside GST, such as alcohol for human consumption and specified petroleum products |
| Outward supplies under reverse charge | Supplies where the recipient is liable to pay tax under RCM |
| Transactions in securities | Included for apportionment, subject to valuation rules |
| Sale of land | Included for ITC apportionment |
| Sale of building | Included where consideration is received after completion certificate or first occupation, whichever is earlier |
Reverse Charge Treatment Under Section 17(3)
Purchases on which you pay GST under RCM are not treated as exempt supplies merely because tax is paid by the recipient.
Section 17(3) refers to supplies on which the recipient is liable to pay tax under reverse charge . This is relevant for the supplier making such an outward supply. For example, if a supplier makes outward supplies to a recipient liable to pay GST under reverse charge, that value is included when calculating exempt supply for ITC apportionment.
Zero-Rated Supplies vs Exempt Supplies
Zero-rated supplies and exempt supplies are different for ITC purposes. This distinction is very important because zero-rated supplies do not require ITC reversal , unlike exempt supplies.
| Point | Zero-Rated Supplies | Exempt Supplies |
|---|---|---|
| Meaning | Exports and supplies to SEZ developer/unit for authorised operations | Supplies on which GST is not payable due to exemption, nil rate or non-taxability |
| ITC availability | ITC is available, subject to conditions | ITC is not available to the exempt portion |
| Rule 42 D1 impact | Not included in exempt turnover | Included in exempt turnover |
| Common examples | Export of goods, export of services, eligible SEZ supplies | Fresh vegetables, milk, specified education services, specified healthcare services |
| Legal reference | Section 16 of IGST Act | Section 2(47) and Section 17 of CGST Act |
Exports and eligible SEZ supplies are zero-rated. ITC related to such supplies is available, subject to GST law conditions. Therefore, exports should not be included in exempt turnover while calculating D1 under Rule 42.
Types of ITC and How Common Credit Fits In
| ITC Type | Meaning | Treatment |
|---|---|---|
| Exclusively taxable ITC | Used only for taxable or zero-rated supplies | Fully available |
| Exclusively exempt ITC | Used only for exempt supplies | Not available |
| Exclusively non-business ITC | Used only for personal or non-business purposes | Not available |
| Blocked credit | Covered under Section 17(5) | Not available even if used for business |
| Common credit | Used for mixed taxable and exempt, or mixed business and non-business purposes | Partly available after Rule 42 or Rule 43 calculation |
| Common capital goods ITC | Capital goods used for both taxable and exempt supplies | Reversed over 60 months under Rule 43 |
Section 17(5) Blocked Credits
Before calculating common credit, blocked credits under Section 17(5) must be removed. These credits are not eligible even if they are used in business.
| Blocked Credit Category | ITC Position |
|---|---|
| Motor vehicles for transportation of persons with a seating capacity up to 13 persons, including driver | Blocked unless used for further supply of such vehicles, passenger transport or driving training |
| Vessels and aircraft | Blocked unless used for further supply, passenger transport, training or transportation of goods |
| General insurance, servicing, repair and maintenance relating to blocked motor vehicles, vessels or aircraft | Blocked unless linked to permitted use or received by specified businesses such as manufacturers or insurers |
| Food and beverages, outdoor catering, beauty treatment, health services, cosmetic and plastic surgery | Blocked unless used for outward taxable supply of the same category, as part of taxable composite/mixed supply, or where legally obligatory for employer |
| Leasing, renting or hiring of motor vehicles, vessels or aircraft covered by Section 17(5) | Blocked unless covered by permitted exceptions |
| Life insurance and health insurance | Blocked unless used for outward taxable supply of same category or legally obligatory for employer |
| Membership of club, health club or fitness centre | Blocked, except where a specific legal obligation supports eligibility |
| Travel benefits to employees on vacation, such as leave travel concession | Blocked, except where legally obligatory |
| Works contract services for construction of immovable property | Blocked except where used for further supply of works contract service or for plant and machinery |
| Goods or services used for construction of immovable property on own account | Blocked when capitalised, except plant and machinery |
| Tax paid under composition scheme | Not available as ITC |
| Goods/services received by non-resident taxable person | Blocked except goods imported by him |
| CSR expenditure under Section 135 of Companies Act | Blocked |
| Goods/services for personal consumption | Blocked |
| Goods lost, stolen, destroyed, written off, gifted or given as free samples | Blocked |
Rule 42 - Common Credit for Inputs and Input Services
Rule 42 applies when inputs or input services are used for mixed purposes. It covers goods and services used partly for taxable supplies and partly for exempt supplies , or partly for business and partly for non-business purposes.
Step 1 - Start With Total Input Tax
| Variable | Meaning |
|---|---|
| T | Total input tax on inputs and input services for the tax period |
| T1 | ITC attributable exclusively to non-business use |
| T2 | ITC attributable exclusively to exempt supplies |
| T3 | ITC blocked under Section 17(5) |
| C1 | ITC credited after removing T1, T2 and T3 |
Formula
C1 = T - (T1 + T2 + T3)
Step 2 - Remove Exclusively Taxable ITC
| Variable | Meaning |
|---|---|
| T4 | ITC attributable exclusively to taxable supplies, including zero-rated supplies |
| C2 | Common credit |
Formula
C2 = C1 - T4
Step 3 - Reverse the Exempt Supply Portion
| Variable | Meaning |
|---|---|
| E | Aggregate value of exempt supplies during the tax period |
| F | Total turnover in the State of the registered person during the tax period |
| D1 | Common credit attributable to exempt supplies |
Formula
D1 = (E / F) x C2
Step 4 - Reverse the Non-Business Portion Where Applicable
| Variable | Meaning |
|---|---|
| D2 | Credit attributable to non-business use |
| C3 | Eligible common credit after reversal |
Formula
D2 = 5% of C2, where common inputs or input services are used partly for business and partly for non-business purposes.
C3 = C2 - (D1 + D2)
D2 should be applied where there is common business and non-business use. It should not be treated as automatic in every case where a taxpayer has taxable and exempt business supplies.
Step 5 - Calculate Total Eligible ITC
Total eligible ITC = T4 + C3
The reversal amount is D1 plus D2, where D2 applies.
Rule 42 Worked Example
Scenario
Ramesh textile sells taxable fabric and exempt cotton yarn. It also has shared office expenses used for both business supplies. A small part of the common office resources is used for non-business purposes, so D2 applies.
| Item | Amount |
|---|---|
| Taxable fabric turnover | ₹8,00,000 |
| Exempt cotton yarn turnover | ₹2,00,000 |
| Total turnover | ₹10,00,000 |
| Total input tax - T | ₹3,00,000 |
| ITC exclusively for non-business use - T1 | ₹8,000 |
| ITC exclusively for exempt supply - T2 | ₹40,000 |
| Blocked credit - T3 | ₹12,000 |
| ITC exclusively for taxable supply - T4 | ₹80,000 |
Calculation
Step 1: Calculate C1
C1 = T - (T1 + T2 + T3)
C1 = ₹3,00,000 - (₹8,000 + ₹40,000 + ₹12,000)
C1 = ₹2,40,000
Step 2: Calculate C2
C2 = C1 - T4
C2 = ₹2,40,000 - ₹80,000
C2 = ₹1,60,000
Step 3: Calculate D1
D1 = (E / F) x C2
D1 = (₹2,00,000 / ₹10,00,000) x ₹1,60,000
D1 = ₹32,000
Step 4: Calculate D2
D2 = 5% of C2
D2 = 5% of ₹1,60,000
D2 = ₹8,000
Step 5: Calculate C3
C3 = C2 - (D1 + D2)
C3 = ₹1,60,000 - (₹32,000 + ₹8,000)
C3 = ₹1,20,000
Step 6: Calculate Total Eligible ITC
Total eligible ITC = T4 + C3
Total eligible ITC = ₹80,000 + ₹1,20,000
Total eligible ITC = ₹2,00,000
Reversal required = ₹40,000
This includes ₹32,000 for exempt supplies and ₹8,000 for non-business use.
Rule 43 - Common Credit for Capital Goods
Rule 43 applies to capital goods used for mixed purposes. Capital goods are used over more than one tax period. For this reason, Rule 43 does not reverse the entire exempt portion immediately. It spreads the common credit over a useful life of five years, or 60 months, from the invoice date.
Rule 43 Categories
| Capital Goods Use | ITC Treatment |
|---|---|
| Exclusively for non-business use or exempt supplies | ITC not credited |
| Exclusively for taxable supplies, including zero-rated supplies | ITC credited fully |
| Common use for taxable and exempt supplies or business and non-business purposes | Rule 43 monthly reversal applies |
Rule 43 Formula
| Variable | Meaning |
|---|---|
| Tc | Common credit on capital goods whose useful life remains in the tax period |
| Tm | Monthly common credit amount |
| Tr | Aggregate monthly common credit for all relevant common capital goods |
| E | Aggregate exempt supply value during the tax period |
| F | Total turnover in the State during the tax period |
| Te | Common capital goods credit attributable to exempt supplies |
Formula
Tm = Tc / 60
Te = (E / F) x Tr
Te is added to output tax liability for the relevant tax period.
Rule 43 Worked Example
Scenario
Verma manufacturer buys machinery for ₹20,00,000 plus GST of ₹3,60,000. The machine is used for both taxable and exempt products.
| Detail | Amount |
|---|---|
| ITC on machine | ₹3,60,000 |
| Useful life under Rule 43 | 60 months |
| Monthly common credit | ₹6,000 |
| Exempt turnover | ₹3,00,000 |
| Total turnover | ₹15,00,000 |
| Exempt turnover ratio | 20% |
Calculation
Step 1: Monthly credit
Tm = ₹3,60,000 / 60
Tm = ₹6,000
Step 2: Monthly exempt reversal
Te = (₹3,00,000 / ₹15,00,000) x ₹6,000
Te = ₹1,200
The business must add ₹1,200 to output tax liability for the month. If the exempt ratio remains at 20% for all 60 months, the total reversal over that period will be ₹72,000.
Rule 42 vs Rule 43
| Point | Rule 42 | Rule 43 |
|---|---|---|
| Applies to | Inputs and input services | Capital goods |
| Reversal method | Monthly calculation with annual true-up | Monthly reversal over 60 months |
| Main formula | D1 = E/F x C2 | Te = E/F x Tr |
| Personal/non-business reversal | D2 may apply where common non-business use exists | Covered through capital goods attribution rules |
| Annual true-up | Required | Generally no annual true-up for normal capital goods, but special rules apply for real estate projects |
| Examples | Rent, professional fees, utilities, marketing services | Machinery, computers, equipment |
Annual True-Up Under Rule 42
Monthly Rule 42 reversals are provisional. At the end of the financial year, the business must calculate the final annual reversal using annual figures.
Annual True-Up Process
- Calculate annual D1 and D2 using annual exempt turnover and annual total turnover.
- Compare the annual reversal with the total monthly reversals already made.
- Reverse the shortfall or reclaim the excess.
| Situation | Treatment |
|---|---|
| Annual reversal is higher than monthly reversals | Reverse the excess not later than the September return following the financial year |
| Annual reversal is lower than monthly reversals | Claim the excess as ITC not later than the September return following the financial year |
If the final annual D1 + D2 exceeds the monthly reversals already made, interest applies from April 1 of the succeeding financial year until the date of payment.
Example
For FY 2025-26, the annual true-up must be completed not later than the September 2026 return.
Special Option for Banks, Financial Institutions and NBFCs
Banking companies, financial institutions, and NBFCs engaged in accepting deposits and extending loans or advances may choose the simpler option under Section 17(4).
Instead of applying detailed apportionment under Section 17(2), they may claim 50% of the eligible ITC on inputs, capital goods, and input services every month. The remaining 50% lapses.
Key Conditions
| Condition | Treatment |
|---|---|
| Eligible taxpayers | Banking companies, financial institutions and NBFCs engaged in accepting deposits, loans or advances |
| ITC allowed | 50% of eligible ITC every month |
| Balance ITC | Lapses permanently |
| Option withdrawal | Cannot be withdrawn during the remaining part of the financial year |
| Same-PAN branch supplies | 50% restriction does not apply to tax paid on supplies between registrations having the same PAN |
| Alternative | Entity may follow normal apportionment instead, if that is better |
Banks and NBFCs should compare both methods before choosing. A flat 50% option is simpler, but it may not always be the more financially advantageous option when taxable income is significant.
Reporting Common Credit Reversals in GSTR-3B
ITC reversals under Rule 42 and Rule 43 must be reported in GSTR-3B Table 4(B). Non-reclaimable reversals such as Rule 38, Rule 42, Rule 43 and Section 17(5) should be reported in Table 4(B)(1).
Reclaimable reversals such as Rule 37, Section 16(2)(b), Section 16(2)(c), and certain temporary reversals should be reported in Table 4(B)(2).
| GSTR-3B Table | What to Report |
|---|---|
| 4(A) | ITC available, auto-populated from GSTR-2B and editable |
| 4(B)(1) | Non-reclaimable reversals under Rule 38, Rule 42, Rule 43 and Section 17(5) |
| 4(B)(2) | Reclaimable or temporary reversals, such as Rule 37 and Section 16(2)(b)/(c) |
| 4(C) | Net ITC available after 4(B)(1) and 4(B)(2) reductions |
| 4(D) | Other ITC details, not the main reversal field for Section 17(5) |
Table 4(C) is calculated after reducing the reversals reported in Table 4(B)(1) and 4(B)(2). The net amount becomes the available ITC for the month.
Annual Reporting in GSTR-9
GSTR-9 reconciles ITC availed and ITC reversed during the financial year.
GSTR-9 Table 7 Mapping
| GSTR-9 Table | Particulars |
|---|---|
| 7A | Reversal under Rule 37 |
| 7B | Reversal under Rule 39 |
| 7C | Reversal under Rule 42 |
| 7D | Reversal under Rule 43 |
| 7E | Reversal under Section 17(5) |
| 7H | Other reversals |
If additional liability is identified while preparing GSTR-9 , it should be paid through Form GST DRC-03.
Interest Applicable to Common Credit Errors
Interest treatment depends on the nature of the error.
Rule 42 Annual Short Reversal
If the annual Rule 42 calculation shows that the business reversed less ITC than required during the year, the shortfall must be reversed not later than the September return following the financial year.
Interest applies from April 1 of the succeeding financial year till the date of payment.
Wrong ITC Availed and Utilized
Where ITC is wrongly availed and utilized, interest applies from the date of utilization of wrongly availed ITC till the date of reversal or payment.
This is relevant in cases such as a wrong claim of blocked credit, an excess claim of common credit, or incorrect reporting that results in utilization of excess ITC against output tax liability.
Simple Interest Formula
Interest = Excess ITC utilised x applicable annual interest rate x number of days / 365
Penalties for Non-Compliance
Penalty depends on the financial year and the nature of the case.
Up to FY 2023-24
| Case Type | Section | Penalty Position |
|---|---|---|
| Non-fraud cases | Section 73 | Tax, interest and penalty of 10% of tax or ₹10,000, whichever is higher, if order is passed |
| Fraud, wilful misstatement or suppression | Section 74 | Tax, interest and penalty equivalent to tax, subject to reduced penalty options at specified stages |
Sections 73 and 74 apply to the determination of tax for periods up to FY 2023-24.
FY 2024-25 Onwards
Section 74A applies to the determination of tax not paid, short-paid, erroneously refunded, or ITC wrongly availed or utilized for FY 2024-25 onwards. It covers both non-fraud and fraud cases under a single provision.
| Case Type Under Section 74A | Penalty |
|---|---|
| Other than fraud, wilful misstatement or suppression | 10% of tax due or ₹10,000, whichever is higher |
| Fraud, wilful misstatement or suppression to evade tax | Penalty equal to tax due |
Section 74A also provides reduced penalty options depending on when the taxpayer pays tax, interest, and penalty. For non-fraud cases, payment within 60 days of notice can close proceedings without penalty. For fraud cases, reduced penalties apply at specified stages.
Common Mistakes to Avoid
| Mistake | Risk | Recommended Action |
|---|---|---|
| Treating purchases under RCM as exempt supplies | Wrong exempt turnover calculation | Include outward supplies liable under RCM where applicable, not normal RCM purchases |
| Including exports in exempt turnover | Excess ITC reversal | Treat exports as zero-rated, not exempt |
| Ignoring SEZ authorised operations requirement | Wrong zero-rated treatment | Verify SEZ supply is for authorised operations |
| Applying D2 automatically in every Rule 42 case | Excess reversal | Apply D2 only where common inputs/input services are also used for non-business purposes |
| Not removing Section 17(5) blocked credits first | Inflated common credit | Remove blocked credits as T3 before calculating C2 |
| Reporting Section 17(5) reversals in 4(B)(2) | Wrong GSTR-3B reporting | Report non-reclaimable Section 17(5) reversals in 4(B)(1) |
| Using Rule 42 for capital goods | Wrong method | Use Rule 43 for capital goods |
| Missing Rule 43 monthly reversal | Interest and demand risk | Track each common capital good for 60 months |
| Skipping annual Rule 42 true-up | Future demand with interest | Complete true-up by the September return after the financial year |
| Mapping GSTR-9 Table 7 incorrectly | Annual return mismatch | Use 7C for Rule 42 and 7D for Rule 43 |
| Applying Sections 73/74 to FY 2024-25 onward without considering Section 74A | Wrong demand framework | Use Section 74A for FY 2024-25 onwards |
Monthly Compliance Checklist
Before Filing GSTR-3B
Check whether ITC belongs to taxable supplies, exempt supplies, non-business use, blocked credit or common credit. Remove T1, T2 and T3 first. Identify T4 separately. Calculate C2, D1 and D2 where applicable. For capital goods, update the Rule 43 register and calculate Te.
Before September Return After Year-End
Recalculate annual Rule 42 reversal using annual E and F values. Compare it with monthly reversals. Reverse any shortfall or reclaim any excess by the September return following the financial year.
Before Filing GSTR-9
Match books, GSTR-3B Table 4B, Rule 42 workings, Rule 43 register, and GSTR-9 Table 7. Pay any additional liability through DRC-03 where required.
Explore All BUSY Calculators for Easy GST Compliance
Conclusion
Common credit under GST is not just an accounting adjustment. It directly affects ITC eligibility, GSTR-3B reporting, annual return reconciliation, and audit exposure.
The correct sequence matters. First, remove non-business ITC, exempt-only ITC, and blocked credits. Then identify taxable-only ITC. Only the balance is the common credit. Inputs and input services are subject to Rule 42. Capital goods go through Rule 43 over 60 months.
For businesses with mixed supplies, the safest process is to maintain a monthly Rule 42 working, a separate Rule 43 capital goods register, and a year-end true-up file before the September return.
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