Put on non-cumulative tax basis - 599L M1

Dazed_and_confused

To be honest it could be as simple as a minor adjustment from the 2017;18 P11D.

The change in tax code is only 35 points so around £350 lower allowance.

This could easily be just originating from the 2017:18 P11D, especially now HMRC have started collecting tax underpaid in the tax year the tax code is changed later in the same tax year.

So there can be two adjustments, one to bring the benefit in kind value upto date and a second t collect the tax due from April 2018 to when the tax code was changed. Because the period the tax from earlier in the year is being collected over is always less than a year the adjustment needed to collect this tax is larger than would have been the case in olden times.

So £350 change overall is nothing too be overly concerned about (if it's correct of course).

The op could just look at their Personal Tax Account to see how the new code is calculated.

avfc82

LilElvis wrote: »

Any other benefits declared on your 17/18 P11d?

No, just oncall allowance

avfc82

Dazed_and_confused wrote: »

To be honest it could be as simple as a minor adjustment from the 2017;18 P11D.

The change in tax code is only 35 points so around £350 lower allowance.

This could easily be just originating from the 2017:18 P11D, especially now HMRC have started collecting tax underpaid in the tax year the tax code is changed later in the same tax year.

So there can be two adjustments, one to bring the benefit in kind value upto date and a second t collect the tax due from April 2018 to when the tax code was changed. Because the period the tax from earlier in the year is being collected over is always less than a year the adjustment needed to collect this tax is larger than would have been the case in olden times.

So £350 change overall is nothing too be overly concerned about (if it's correct of course).

The op could just look at their Personal Tax Account to see how the new code is calculated.

Should I phone the Tax office anyway? Or not worth it?

calcotti

avfc82 wrote: »

Should I phone the Tax office anyway? Or not worth it?

I think it’s always good to understand your tax code so if I were in your position I would ring them - whether you get through to someone who can actually answer the question will be another matter.