Pre paid expense qualify

Hi Team

Need your guidance and input on prepaid expenses, i want to know is there any standard rulre to arrive the prepaid expenses or a Magic number for the year cost,( assuming we receive invoice for the AMC for the cost for 1 year) can we book the entire amount in the month of invoice received or do we need to book it to prepaid expense and allocate the expenses month by month? (is it mandotory to do it month wise? as per accounting stadard) or it just up to the company to decide to take the cost in month month or spread it to 12 months? 

Hope i made point clear and expencting your sugeestions. 

Thanks

Anbu