u/Remarkable-Dig5052

Hi this is my first time doing it, I have been self employed for two months from august 2026 and then had a regular job for a while currently unemployed.

So do I just add together the money I made while I was self employed with the amount on my p60 from my regular job from the "pay" section and then take away the amount from the "tax deduted" section on my p60 - 12570(allowance) and then just pay HMRC 20% on the remainder amount I get?

Or does the amount in the "pay" section on my p60 already contain tax so shall I minus the amount of the total tax I paid from it first and then take away the allowance + tax and continue the calculation from there?

Thanks a lot

it needs a new faction right now, what do you guys think?

I was self employed for a bit during the 25-26 tax year and I know there is an option to pay my tax in monthly installments.

Can I start paying it on the 31st of january and do monthly installments from there or do I have to start beforehand and pay the amount I owe until the 31st of january ?