Income Tax · AY 2026–27
234A / 234B / 234C interest
AY 2026–27 ordinary cases with no partial self-assessment payments. The remaining tax may be settled in one payment or treated as unpaid through filing.
EXAMPLE
The working, explained.
| Instalment | Target | Cumulative advance tax | Interest-bearing shortfall | 234C interest |
|---|---|---|---|---|
| 15 June 2025 | 15% | ₹0.00 | ₹15,000.00 | ₹450.00 |
| 15 September 2025 | 45% | ₹0.00 | ₹45,000.00 | ₹1,350.00 |
| 15 December 2025 | 75% | ₹0.00 | ₹75,000.00 | ₹2,250.00 |
| 15 March 2026 | 100% | ₹0.00 | ₹1,00,000.00 | ₹1,000.00 |
What this result includes
234A: 2 calendar month(s) or part; 234B: 6. The interest base is ₹1,00,000.00, after dropping the fraction of ₹100 under Rule 119A.
No 234C interest is charged for June / September if 12% / 36% respectively was paid. If that tolerance is not met, the shortfall is measured against 15% / 45%.
Assumes one full settlement of the remaining tax principal on the payment date entered, and no earlier partial self-assessment payments. Interest is additional to that principal.
No 234F late-return fee, revised-return fee, assessment changes or special-income instalment relief is included. Interest components are shown before final payable rounding / portal reconciliation.
OFFICIAL REFERENCES
Check the source.
Reference review: 15 September 2026. Apply the provisions for your period and facts; notifications and portal requirements can change.