# Section 115BAC — Disallowed Deductions in Concessional Regime
Section 115BAC offers a concessional tax regime (the default regime for individuals/HUF/AOP/BOI/AJP from AY 2024-25 onwards). In return for lower slab rates, several deductions/exemptions are NOT allowed.
## Deductions/Exemptions NOT available under 115BAC
| Section | Item | Note |
|---|---|---|
| Sec 32(1)(iia) | Additional Depreciation | 20% of cost for new P&M of manufacturing / generation of electricity — disallowed. |
| Sec 35(1)(ii) | Donation to approved Research Association / University / IIT / National Lab — for scientific research | Disallowed. |
| Sec 35(1)(iia) | Payment to Indian Co. engaged in R&D | Disallowed. |
| Sec 35(1)(iii) | Payment to approved University / College for social science / statistical research | Disallowed. |
| Sec 35(2AA) | Payment to IIT / National Lab / University with specified direction for scientific research | Disallowed. |
| Sec 35(1)(iv) | In-house scientific research expenditure | Allowed (this one IS allowed). |
| Sec 35AD | Specified business deduction (cold chain, warehouse, hotel, hospital etc.) | Disallowed. |
| Sec 10AA | SEZ Units exemption | Disallowed. |
## Key Rule on AMT (Alternate Minimum Tax)
> If the assessee has opted OUT of the default (115BAC) regime and has claimed deduction u/s 10AA or 35AD, then AMT applicability must be checked.
If assessee stays in default 115BAC regime → AMT does not apply (as those deductions are already disallowed).
## Quick decision flow
```
Assessee under 115BAC (default)?
│
├── YES → Additional Dep / 35 series / 35AD / 10AA all DISALLOWED → No AMT issue
│
└── NO (opted out) → All deductions allowed (subject to other rules)
→ Check AMT u/s 115JC if 35AD / 10AA claimed
```