GST Input Tax Credit Calculator
Use this GST Input Tax Credit Calculator to estimate eligible ITC, compare Books vs GSTR-2B, check blocked credit risks under Section 17(5), and review net payable before filing GSTR-3B. Need only head-wise IGST/CGST/SGST utilization under Rule 88A? Use the dedicated ITC Set-off Calculator.
GST ITC eligibility and working calculator
Who is this for?
How to use this calculator
Common ITC situations (quick reminders)
180 Days Rule
If payment to the supplier isn't made within 180 days, proportionate ITC may need to be reversed with interest. You can re-claim later when payment is completed.
2B Visibility
A practical approach is to claim conservatively based on GSTR-2B and reconcile differences. Try the 2B Reconciler for invoice-level reconciliation.
RCM Liability
RCM is typically paid in cash first, and eligible ITC is claimed after payment. Use the RCM Calculator to model cash impact.
Consequences of wrong ITC claim
Claiming ineligible ITC (e.g., blocked credits) can lead to reversal, interest and penalties. Interest rates depend on the nature of default and applicable provisions—always verify with current law/notifications.
ITC utilization reminder: Rule 88A
A common error is using the wrong credit to pay liability. Rule 88A guides the order of utilization, especially how IGST credit can be applied after IGST liability. For detailed head-wise utilization and strategy comparison, use the ITC Set-off Calculator.
| Input Credit Source | 1st Priority | 2nd Priority | 3rd Priority |
|---|---|---|---|
| IGST Credit | IGST Liability | CGST / SGST (any order) | — |
| CGST Credit | CGST Liability | — | — |
| SGST Credit | SGST Liability | — | — |
Section 17(5): Blocked Credits (No ITC)
Some inputs are blocked even if GST is paid. The tool includes a quick helper to flag common blocked credit categories.
- • Motor vehicles (personal/blocked use cases)
- • Food & beverages, outdoor catering (with exceptions)
- • Memberships (club/health/fitness)
- • Works contract for immovable property (with exceptions)
- • Business expenses with valid tax invoice
- • Input services used for taxable supplies
- • Bank charges / professional fees (business use)
- • Tools/software subscriptions (business use)
4 mandatory conditions to claim ITC
Use this as a checklist before you claim:
Frequently Asked Questions
Q. Can I claim ITC if my supplier has not filed / the invoice is not in GSTR-2B?
In practice, ITC is restricted to what reflects in GSTR-2B and meets section 16 conditions. If an invoice is missing from 2B, follow up with the supplier and reconcile before claiming to reduce mismatch risk.
Q. What is the time limit to claim ITC?
ITC can be claimed up to the cut-off under section 16(4) (commonly linked to the next FY return due date) or the annual return filing date (GSTR-9), whichever is earlier, subject to amendments.
Q. Can I claim ITC on mobile phones and laptops?
Often yes if used for business and the invoice is in the business name/GSTIN, and the credit is not blocked under section 17(5). Keep documentation to support business use.
Q. What is Rule 36(4) / why does 2B matter?
A common compliance practice is to claim ITC conservatively based on GSTR-2B and reconcile differences. This tool’s “2B matcher” helps you spot mismatches and apply a cap if needed.
Q. Can CGST credit be used to pay SGST liability?
No. Cross-utilisation between CGST and SGST is not allowed. IGST credit can be used to pay IGST first, then CGST/SGST (any order) as per Rule 88A. For a focused head-wise utilization working, use the ITC Set-off Calculator.
Q. What is the 180 days rule for ITC?
If you do not pay your supplier within 180 days (as applicable), you may need to reverse proportionate ITC with interest, and you can re-claim later when payment is made.
Q. How does ITC work for RCM invoices?
RCM tax is typically paid in cash first. Eligible ITC (if any) is generally claimed after payment, subject to conditions and proper documentation. Verify timing with your return workings.
Q. How should I treat credit notes / amendments in Books vs 2B?
Credit notes, amendments, and timing differences can cause mismatches. Reconcile invoice-wise and period-wise, and prefer a conservative claim approach until statements align.
Q. What is the difference between this GST ITC Calculator and the ITC Set-off Calculator?
This page is broader and helps with ITC eligibility, 2B/books mismatch, blocked credits and ITC working. The ITC Set-off Calculator focuses only on head-wise IGST/CGST/SGST credit utilization and cash payable.
Sources & verification
This page provides a practical estimation and a utilization breakdown. Actual return values depend on your invoices, eligibility, and what reflects in your GST statements. For compliance/disputes, rely on the law/notifications and professional advice. This page is a broad ITC working tool; use the dedicated ITC Set-off Calculator for head-wise utilization.