Self-assessment says I've underpaid tax. Don't understand why

463 Posts

in Cutting tax
I changed jobs at the start of March.
I have to do a self-assessment, as we got child benefit, which we now have to pay back due to salary being over £50k.
I got to the end of the assessment, and it's telling me I've underpaid tax by £1000. Very surprised and don't understand why.
My previous employer didn't issue a P45, just a final payslip. I've used the numbers for total pay and tax from this, plus the P60 from my current employer.
I was expecting to pay back some of the child benefit, but not expecting a tax underpayment. Any ideas?
Can I get this checked, or do I just have to cough up?
I have to do a self-assessment, as we got child benefit, which we now have to pay back due to salary being over £50k.
I got to the end of the assessment, and it's telling me I've underpaid tax by £1000. Very surprised and don't understand why.
My previous employer didn't issue a P45, just a final payslip. I've used the numbers for total pay and tax from this, plus the P60 from my current employer.
I was expecting to pay back some of the child benefit, but not expecting a tax underpayment. Any ideas?
Can I get this checked, or do I just have to cough up?
0
Latest MSE News and Guides
Replies
This is one of what could be a number of explanations.
(Ha sido divertido)
Hmm now this is interesting. Because on my final payslip, the 'TotGross' and 'TxblePay' are the same. That seems wrong, because I was paying £500/month into the company pension plan.
Lewis Carroll
(Ha sido divertido)
The underpayment of £1000 seems a rather large amount to lose in the change of employer though.
What figures do you need me to show?
The pension was salary sacrifice, so taken off the taxable gross.
So your gross pay is what you get paid.
You do not make any pension payments. Your employer makes pension payments. Is their an entry on your P60 showing employers pension payments?
What pay and tax are shown on final payslip? Code number and month number?
What are the corresponding figures on the P60?
Lewis Carroll
Although it's a bit intrusive I think you'll need to post real numbers to get help with the calcs on this.
And explain how your pension get paid - salary sacrifice, net pay etc.