Tax Code Query - company car/fuel allowance

dantheman2010

Good evening all.

I have a query in my tax code, just want to make sure its correct.

In my job I originally didnt have a company car and my tax code was 647L, then I was given a company car but had to supply my own private fuel so tax code went to 419L, which was only £40 less a month.

Now this year I am going to get given fuel allowance and the code has reduced to 147T, which according to all online calculators is only £45 less per month than before.

So all in all I am only £85 worse off a month than at the start but get a car and petrol allowance. Is this correct? 647L to 147T seems like a massive drop is the above figures correct?

I have tried about 6 different calculators and they all agree with the above.

Am I missing something?

Thanks guys