Dear Krishna Murthy Sir,
You views are absolutely right. Totally in agreement with your understanding.
Interest is by default according to Sec. 50. Explicitly 75(12) states that the interest (which is determined in accordance with Sec. 50) remains unpaid then department shall recover it under Sec. 79 proceeding.
The interest mentioned under section 73 and 74 – In my view, interest is there for the convenience of the Noticee as well as the department. While adjudicating the notice, it's better to have all liabilities in one place, hence, the determination is for tax, interest and penalty.
If the notice doesn't even mention ‘interest’ or adjudication is only for tax and penalty then also you cannot get away from the rigors of interest liability. [See. 75(9)]
For interest, SCN (if any) should be under Section 50. And thereafter recovery proceeding. Other view, there is no adjudication of interest liability, interest is a by default liability. Even, it may be argued that do we even need SCN for Interest? If no adjudication is involved then why show cause the noticee, the department may directly send you the amount of interest payable and on default initiate recovery proceeding. With a caveat that the noticee is not contesting the tax/ITC liability.
Excellent observation made by Alkesh Sir. My views on that:
73(7) says if the 'amount' actually payable under 73(5) falls short then the department may Issue notice under 73(1). The question being what is the amount u/s. 73(5), is it tax/ITC along with interest or only tax/ITC? [Mind you ITC is missed u/s. 73(5)]
In my view, it is only tax/ITC. For two reasons, (i) 75(5) says ‘amount of tax’ along with interest, which means the amount they want to convey is only tax, and (ii) Notice u/s. 73 (1) is restrictedto tax/ITC, because even 73(1) says that interest is payable u/s. 50. On a conjoint reading of these two reasons, my view, it is only restricted to tax/ITC. This 73(7) is the situation when you have wrongly determined the tax liability and then department thinks that still taxes to be recovered then they will proceed under 73(7) and issue a notice under 73(1).