To do a calculation, I need to assume that you earn £21,000 in a tax year. If you start work now and haven't been working since 6 April, you're still entitled to the whole year's personal allowance and that will be taken into account when calculating your income tax deduction each month, so your tax could be less to start with because you have unused allowance to use up.
Having said that, it goes like this:
Income Tax: £21,000 - £11,000 personal allowance = £10,000, taxed at 20% = £2,000 tax for the year or £166.67 per month.
National Insurance is calculated each pay day so we can do a monthly calculation. £21,000/12 = £1,750. £1,750 - £672 primary threshold = £1,078, taxed at 12% = £129.36.
Net pay after those two = £1,750 - £166.67 - £129.36 = £1,453.97.
And as Andi suggests, if you're having to pay into a workplace pension, that will come off as well. If you pay that, it reduces your pay for income tax purposes so the amount of income tax will be slightly less.
that would be the net amount you take home which considers the taxes that are withheld less the exemptions or other allowances you might be entitled to
Answers & Comments
To do a calculation, I need to assume that you earn £21,000 in a tax year. If you start work now and haven't been working since 6 April, you're still entitled to the whole year's personal allowance and that will be taken into account when calculating your income tax deduction each month, so your tax could be less to start with because you have unused allowance to use up.
Having said that, it goes like this:
Income Tax: £21,000 - £11,000 personal allowance = £10,000, taxed at 20% = £2,000 tax for the year or £166.67 per month.
National Insurance is calculated each pay day so we can do a monthly calculation. £21,000/12 = £1,750. £1,750 - £672 primary threshold = £1,078, taxed at 12% = £129.36.
Net pay after those two = £1,750 - £166.67 - £129.36 = £1,453.97.
And as Andi suggests, if you're having to pay into a workplace pension, that will come off as well. If you pay that, it reduces your pay for income tax purposes so the amount of income tax will be slightly less.
Free, official, calculator for Income Tax and National Insurance Contributions on gov.uk/taxes.
What's your tax rate?
In the US it's 24%, so that means 24% is deducted.
that would be the net amount you take home which considers the taxes that are withheld less the exemptions or other allowances you might be entitled to
Ask local educated adults for actual info locally as it varies greatly depending on where you live