Underpaid PAYE, when will I need to pay?

biscan25

Hi,
Due to a litany of errors from HMRC and my 'employer' (an umbrella co) I reckon I owe HMRC about £4,200 in PAYE for 21/22. This arose because HMRC gave the employer a new tax code but it was applied on a non week zero basis, with zero cumulative income, resulting in me getting a £2k refund and my tax being wrong for about 6 weeks.
After repeated phone calls HMRC said this is too hard to fix?! And I should keep the money aside.

I intend to earn £99,999 this tax year to avoid having to do a tax return, but if I do one anyway will this mean that I don't have to pay the owed tax until January 2023?

I'm guessing if I don't do one I'll get a demand for payment in summer?

Thanks

Anthony

biscan25

Oh, if I did need to do a tax return, I'd submit it in April 2022; my affairs are not complicated, so would hopefully beat HMRC's recalculation.

Dazed_and_C0nfused

For an amount that size you will probably be looking at 31 January 2023 whether you do a return or not.

Because it's more than £3,000 (the maximum HMRC collect via your tax code in this scenario) you would get a Simple Assessment calculation and have to pay that by 31 January 2023.  Or 3 months later if it wasn't issued by the end of October 2022.