As per new visa rule changes indian govt introduce new categories of e-tourist visa as per new categories of e-tourist visa now travelers can apply for one month, one year, 5 year validity of e-visa at discounted price

one month e-visa is double entry e-visa coast around $25-30
once year e-visa available at discounted price
5 year multiple entry e-visa available at $80

At non peak season e-tourist visa for one month available at $16 (april to june)
For more info visit https://bit.ly/2JfPGln