as far as deprication is consider the date on which the machinery / brought and ready for use should be taken as a date from where u can charge the deprication , although the machinery is ready for use but not use , so u can take a depriciation of full year , like for example if u purchase a car before 30 th september u can take a full year deprication , its dnt matter whether u use the car or not
suppose u purcahse a car on 1 st september but u had not even touch the car u can claim for deprication for full year ...
however as far as additional deprication if u want to claim additional deprication the condition is that the machinery should be use for more than 18o days , if u had not use the machinery for more than 180 days u cant claim 20 % , as the machinery is not been use for more that 180 days u cant claim 20% u can claim only 10%
tell me onething on that car example if i purchase a car on 30 septermber at the close of the working day , what deprication rate i am going to claim for its 15 % or 7.5%
its obviosly 15 % , again for additional deprciation as per the clear wording use more than 180 days , so here we had not use the machinery for more than 180 days so we can claim 10 % additional depricaition
hope its clear if not then refer to t.n. manoharan for furtue details