Property and Trading Allowance - Where the £1,000 allowances cover all of the income (no expenses are ever allowed) then you don’t need to declare it. In the case of these being your only other source of income it means you don’t need to do a tax return anymore.
So for example, you’re a teacher and you do some tuition earning £15 a week then previously you should have completed a tax return and provided you don’t have any income other that your PAYE salary then you probably don’t need to do a tax return. There is quite a bit more to this particularly where people have a main sole trade and a ‘hobby business’ and the detail can be found on the following link:
Since the rise in popularity of websites such as Air B&B, HMRC have been consulting on whether rent a room is fit for purpose. The upshot is, we’re likely to see some sort of ‘residence’ test with casual B&B type arrangements either being treated as a trade or being subject to the much tighter £1,000 property income allowance.
As a reminder if you need to complete a tax return you must register by 5th October to be sure to avoid a penalty. It’s important to note that if you do need to complete a tax return and fail to do one, HMRC ‘not sending you one’ is not considered a reasonable excuse if you are subject to a compliance check.