phara3000

If both employed and self employed do you pay class 4 national insurance if profits from both incomes go over 12,570 or do you pay only if self employment income goes over 12,570? Considering national insurance on the employment income has already been paid from paye. What if profit is between £6,725 and 12,570 is there any NI to pay then?

Is this self assesment calculation process correct for someone who is both employed and self employed? P60 paye gross income + self employment (-trading allowance) - personal allowance - paye employment tax and NI already paid = taxable amount. But prior to determining the liability, will hmrc put aside employment income which has already been taxed, and only apply tax (and Ni) to self employment income? As otherwise it looks like by being both employed and self employed you get taxed on employment net income + self employment (-pa).

On the previous self assesment tax return I claimed expenses of £300. Can I amend that self assesment to add in the rest of the trading allowance amounting to £1000 or ask for the trading allowance to be considered instead? And then have my tax return recalculated?