given the frequent changes it's hard to keep track, but the best source is the customs website's tariff calculator. It's not 100% up to date but it's the closest freely accessible source of tariff information.So, according to this, before the increase in May (Which was a whopping 37% for Diesel and some 23% for Petrol) The total tax is about 30% of the retail price of petrol at 5% VAT and about 44% at 15% VAT. TheIndian article, which quotes an Association of Indian Chamber of Commerce official is probably just about right when they say the total tax for petrol in Sri Lanka comes to about 37% of the retail price. That's high.
Before the change in May it was something like this;
Petrol - customs duty of Rs.5 per litre and a surcharge of 10% on this Rs. 5 which makes it R.s 5.50 per litre. Excise duty of Rs. 20 per litre, VAT 15% (in the last budget it was brought down to 5% but I'm not sure where this stands at the minute), Ports and Airports levy 3% and social responsibility levy of 1.5%. This is when petrol is completely imported as it is done by LIOC.
So if petrol costs Rs. 127 per litre CIF, the taxes on this would be Rs.38 at 5% VAT at Rs. 57 at 15% VAT.
According to Customs there are no tariffs, VAT, or any other levies on crude oil imports - and CPC refines 50% of its petroleum from crude oil imports (but still pays the VAT, excise on the petrol retail price).
For Diesel, again prior to changes in March, there was no customs duty or VAT, there was a Rs. 2.50 per litre excise duty, 3% PAL and 1.5% SRL.
More on petroleum on deaned.
p.s. : Blogging is slow these days. I'm suddenly very busy and every time I do blog, I can think of 100 other things I "should" be doing. So if this doesn't update often, don't be surprised.