is fair under these circumstances?
For context, my son is 19, this is his first job. He finished college last June having spent 3 years there doing vocational/skill-based courses. He's not academic so uni wasn't something he wanted, but he's very active and practical/logical-minded. I said while he was in education I would 100% support him; even if he had a job, he could keep all that income. He chose not to find a part-time job, entirely his choice.
Since June any support I received for him stopped, I'm a single parent, and I work full time, but my wage isn't a lot so I received UC and CB to top it up. As soon as he finished college all the elements for him stopped. I made him aware of this. These reductions in my income were around £350 a month.
He did find this job fairly quickly in mid-July, but due to the nature of the role, it required DBS checks which were a nightmare to sort out when he had no ID or statements. But we sorted it for mid-August. He's been waiting since then to start and finally started this week.
The wage he will be getting at 19 is not terrible. It equates to around £1300 a month after tax and whatnot. I have said I think £400 is fair, and I will continue to pay for everything he received up until now, all meals, if we have take out or eat out ill pay. If he wants to take over his own phone contract, apple music, xbox live, etc (all combined with them for my other children still so I don't mind keeping these) and he wants to arrange all of that himself, then he can give me £350 instead.
I see it as for 6 months I have 100% supported him with no income at all, in fact, I have really struggled to do so, but have not said anything as he was waiting to start this job. But I do need to recoup this money somehow and feel asking him to contribute that much is fair.
He will still have £900 a month, which is a damn sight more than I have spare, and very few outgoings as the workplace is within walking distance, and I in fact work on the same site so days our shifts line up he can come with me.
Is £400 a month a fair amount?