Best judgment assessment upheld on unreliable accounts, while penalty had to be recomputed with statutory deductions applied.

A best judgment assessment based on defective and unreliable accounts, including absent production-cum-stock and proper stock records, was upheld because estimation is permissible where the basis is rational and not arbitrary. The assessment was not interfered with merely because it involved guesswork and relied on electricity consumption and input-output ratio. By contrast, the penalty under Section 12(3)(b) was set aside for re-computation because the authorities had levied it on the entire turnover without applying the deductions required by the Explanation. The matter was remanded for fresh determination of penalty alone in accordance with the statutory scheme.

---

---

Issues: (i) Whether the best judgment assessment based on electricity consumption and input-output ratio, in the context of defective and unreliable accounts, called for interference; (ii) Whether the penalty levied under Section 12(3)(b) required re-computation in the light of the Explanation to that provision.

Issue (i): Whether the best judgment assessment based on electricity consumption and input-output ratio, in the context of defective and unreliable accounts, called for interference.

Analysis: The books of accounts were found to suffer from material defects, including absence of production-cum-stock account and proper stock records. The assessment was therefore not founded on electricity consumption alone, but also on the unreliability of the accounts. A best judgment assessment necessarily involves estimation and some element of guesswork, and interference is not warranted unless the estimate is shown to be arbitrary, capricious, or devoid of a rational basis.

Conclusion: The best judgment assessment was upheld and no interference was called for.

Issue (ii): Whether the penalty levied under Section 12(3)(b) required re-computation in the light of the Explanation to that provision.

Analysis: The authorities below had levied penalty on the entire turnover without applying the deductions specifically contemplated by the Explanation to Section 12(3)(b). The statutory scheme requires exclusion of specified components while determining the quantum of penalty, and that aspect had not been considered.

Conclusion: The penalty was set aside for the limited purpose of re-computation and the matter was remanded to the Assessing Authority for fresh exercise on penalty alone.

Final Conclusion: The assessment on merits was sustained, but the penalty component was sent back for fresh determination in accordance with the statutory deductions under the Explanation to Section 12(3)(b).

Ratio Decidendi: A best judgment assessment based on a rational and relevant basis will not be interfered with merely because it involves estimation, but penalty under the applicable provision must be computed strictly in accordance with the statutory explanation governing permissible deductions.

---