Tax calcs for starting mid tax year
Tax calcs for starting mid tax year
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Someotherusername

Original Poster:

13 posts

22 months

Yesterday (17:43)
quotequote all
Hi all,

Finally starting a new job after some time out of work. What I’m struggling to work out is what my likely take home will be monthly for this financial year (next year is fine as it’s a full year).

I’m starting on Monday, but haven’t worked at all so far this financial year. As I understand it, I’ll get the full year personal allowance but use it between now and next April.

Does anyone have a link to a calculator that can handle this? Best I’ve managed so far is to take the 4.5 months pay, treat it in a calculator as the annual number and then divide the net by 4.5. However I’m not convinced that treats NI correctly.

I know I can wait until December when I get paid but I’d prefer to have even a rough idea now!

If there’s not a calculator around, if anyone can share the logic or even a way to calculate myself I’d appreciate it. For example I don’t know if all the accumulated allowance will go against the first pay packet, or if it’s distributed evenly across the remaining months.

Thanks.

ExBoringVolvoDriver

10,780 posts

62 months

Yesterday (18:04)
quotequote all
I am not an expert although my understanding is that it will depend on what tax code is utilised by your employer.

If you don’t have a P45 then an emergency code will probably be used so that you will initially pay more tax -

Mortarboard

11,000 posts

74 months

Yesterday (18:39)
quotequote all
Most payroll software can calculate the amount of tax free allowance you've still got,if it has the data (p45 etc)

So for the first few weeks, you may be using your "unused" tax free allowance, meaning your paychecks will have no income tax removed, and you'll get paid more until it catches up.

Failing that, you'll need to do a balancing done by hmrc at the end of the tax year (relatively painless, they'll have all the data)

M.

Callerton

108 posts

67 months

Yesterday (19:18)
quotequote all
You could do it the old-fashioned (& tedious) way:

The regular annual Personal Allowance is £12,570. Income (earnings + any other taxable income) over this is taxable at 20% or possibly 40 / 45% depending on how much itis.
Here I'm going to use £12,000 as I haven't got a calculator to hand & I'm too lazy to find one.
Then in month 1 (usually 30th April) you've got £12,000 / 12 = £1,000 "freepay" to set against your earnings. Anything over that is taxed at 20% via the employers payroll system.
Month 2 you've got got £2,000 "freepay" to set against April's pay + May's pay.
And so on.
Starting in December, then you'll have 9 / 12 X £12,000 freepay = £9,000. So you don't suffer tax unless your pay all year (i.e. start of the (tax) year + now) exceeds the £9,000.
If you have a P45 to hand in to your employer, you might even get a refund via the payroll.

By month 12 you should have paid the correct amount of tax on your earnings fro the year.

Someotherusername

Original Poster:

13 posts

22 months

Yesterday (22:04)
quotequote all
Thanks everyone, that’s helpful.

I don’t have a p45 to give them for this tax year, the new starter checklist I completed for tax asked if this was my only employment for this tax year which I confirmed. I guess that doesn’t necessarily mean I’d be on 1257l though, not sure.

When I start I’ll ask payroll what tax code they’ll have me on and if it’s something else I’ll see if there is anything I can provide to change that!

The problem I guess I’m having is that the annual number will mean I lose all my personal allowance, but as I’ll only be earning for a few months this tax year as I understand it I’ll benefit from the full allowance. So it’s all short term benefit only, I just like to know where I stand rather than finding out after the fact!

Might be a nice Christmas ‘bonus’ for this year then!

deggles

667 posts

221 months

This might work: give yourself a 'fake' tax code and plug it into here:
https://www.thesalarycalculator.co.uk/salary.php

So if you only work 4.5 months then your tax free allowance is effectively multiplied up: £12,570 / (4.5/12) = £33,520 equivalent

Stick in your annual salary and 3352L as your tax code and the calculator will give you an idea of your monthly take home (and still work out NI correctly as that's based on monthly/weekly earnings)


Edited by deggles on Friday 14th November 09:30

MustangGT

13,552 posts

299 months

Given a standard tax code of 1257L this equates to a tax free allowance of 12570/12 per month = 1047.50. This is cumulative therefore if you start work in month 8 without working you will get 8/12 in November = 8380. Assuming you earn less than 87380/month you will pay no tax this month.

Regarding the lack of a P45 you will need to fill in a new starter form I think it is a form with HMRC 09/22 as a footer, no official form number. If you get this complete before the pay run you should have a reasonable chance of getting the correct code.

Otherwise, emergency monthly tax should allow you 1047.50 per month before tax as the standard code.