According to The Finance Act, No. 35 Of 2018 of Sri Lanka, an additional levy on Short Message Services shall be charged on the bulk advertisements sent through short messages services, at the rate of 25 cents per each mobile short message.
View the relevant act here: http://bit.ly/2TjVqk2
Which means, you need to pay an additional levy of 25 cents for every message you send with the content regarding a product or service promotion, discounts, offers or any other brand promotion content.
This doesn’t apply for your regular customer alerts, notifications, seasonal greetings and all non promotional messages you send.
According to this new levy introduction, we at Notify.lk will charge you this tax from our internal filtering using the content of your SMS and will be deducted from your balance in the same manner we are charging you the SMS cost. We will indicate you these deductions in the My Campaigns page, and this update will reach you as soon as possible.