I work from home, very part time. Up until very recently I've never earned enough to pay income tax as my earnings are pretty much level with the personal allowance as it has increased over the years.
This year I've taken on more work and with two months still to go on the tax year I'm already £500 over the personal allowance. This is a good thing - I'm earning more! I know I'll pay class 2 as I always do. And class 4 NI on an extra wodge over the limit. And income tax on the bit between the personal allowance and my earnings (but at a slightly lesser rate as I'm in Scotland).
Plugged all the numbers into a calculator and it came up with a figure of around £1300. Fine. If that's what's due, that's what I'll have to pay.
Then it went on about payment on account for tax year 2019/20. What's that all about? Assuming it's a deposit/advance on any tax I might be due for the year after?
As any freelancer knows, predicting what you're going to earn year to year is impossible. I have had a good year by my standards. Next year might be crap and I earn £9k. Is payment on account compulsory, or can I just not make it, and carry on doing my returns as normal, paying what's due, when it's due? My "business" is very straightforward in that it's writing/reseach based. I have no costs to declare, no stock to buy, no overheads or depreciation. All earnings are profit. So I don't have an accountant, and it's not worth employing one.