Posted: Wed Mar 11, 2020 11:04am
Brexit means that tax is on the GROSS at 24% after transition for British residents - profit or no profit, no allowances given. However, you are still required to file a tax return even if you make a loss, not just if you consider you have made a profit. The requirement is to file a tax return every quarter if you are a non-resident and receiving rental for your property, whether you made a profit or a loss is irrelevant to the need to file the return. But obviously if the property is unlicensed then you wont file a tax return as it's an illegal rental!
Technically if you receive a penny/cent for the use of your property it is renting it. As Jim said, impossible to trace a small cash payment made direct in the UK but it is still a payment for use of the house. If questioned by the police (ie a neighbour reports someone being there), and the guests state they paid you £50 then you can be fined for unlicensed letting.
People often overlook the insurance side of things. If other people are staying in your house then double-check the small-print of your policy. Insurance companies are known to wriggle out of payouts whenever possible, so you should ensure your holiday home policy covers use by other people when you are not there with them. If they find out you have received a payment then they wont pay out if you do not have the correct cover, ie holiday let cover - theft, damage, fire, public liability etc., whatever - they will not pay leaving you picking up the cost.
I know people will say this is taking things to the extreme, people have got away for years doing this, and will in many cases continue to get away with doing it. but sooner or later some will be caught out. So you need to accept that what you are doing could leave you open to being heavily fined and totally uninsured. If you want to take that risk, then at least you have chosen to do so knowing the risks, your choice. However, please do not tell others that this is ok without explaining the risk they are taking - the law is clear.