Maintenance payments

[crappyday2018]

Sorry wasn't sure if this goes in relationships or parenting.
My ex has paid me maintenance since he moved out last Easter. I suspected it wasn't the full amount but as I didn't know his exact salary I didn't say anything. I also didn't want to rock the boat as it was not an amicable split and I had to sell the house etc.
The tax credits still had an old joint claim (for some reason) and sent renewal forms through which had his current salary on. Lets just say he's on far more than I thought! using the online calculator, tells me he's at least £50 a month short.
I know this isn't a massive amount but it annoys me that he knows he is underpaying for his kids. He's sat at home with his mother saving a fortune and buying nice new cars.
Our house is about to sell so all those ties will be cut.
My question is - do I say something about the maintenance and risk everything kicking off again?

I'm confused. How come tax credits know how much he's earning but you didn't?

In any case, just complete the renewal forms they sent you and return them, getting an extra £50 a week. No need to speak to him about it at all.

Just to add, I agreed to pay the mortgage after he left so I've been struggling with that for over a year on my own.
He doesn't chip in to help pay for school uniform/shoes etc.

NotSuchASmugMarriedNow1 why would I know what he earns? He's clearly had a large payrise since we split up.
The old joint tax credits claim was from years ago but for some reason, they still send renewal forms saying we're not entitled to anything. Tax credits can check your salary so they had mine on there too.
I've told them several times this claim should be closed down as I have my own single claim.
Its maintenance payments I'm asking about, not tax credits.

Renew tax credits as a single person claim as you may be entitled to more. Go through csa for maintenance as they will know how much he earns exactly through his employer

Sorry! mis-read the original post.

Can you claim CM through the CMS though? So you don't have to talk to him.

Yes you bloody well do say something!

Text him that you've just realised that according to the online calculator, he's been underpaying you the minimum amount cms expect him to pay by £50 a month. Ask him whether he want to just adjust the amount he pays in the future (and pay the backlog) or whether he would prefer you go through the official channel of applying to cms.

Let him kick off as much as he wants, you can just ignore it now you no longer live together, and tell him cms sets the minimum rate, not you.

Tight bastard.

Thanks all. I already have a single claim with tax credits and that is all fine.
I know I should definitely say something. I've been doing all the pick-ups and drop offs for most of the last year too as he's not had a car (until recently). No extra payment for my diesel costs!!
I hate confrontation with him but I know I need to do it.

If you don't like confrontation just go through the CMS. Restrict all communication to email or text and tell him he needs to do picks and returns now he has a car.

My ex isn't paying a penny and is self employed so cms can't even get the money it's so frustrating

Penfold007 yes I know I'm best doing that although it would still cause a confrontation when he got the letter. He has been doing his share of the pick-ups since he got his car.
Once the house sale completes and I move out, I will contact cms.

@crappyday I've just realised that my post sounds rather harsh and that's not how I meant it. Is there someone that could help with hangovers for a while or are DC old enough to go from front door to car and back on their own?

Penfold007 no it wasn't harsh at all!! I can't really avoid handovers (or hangover haha) but I keep telling myself that he;s in the wrong, not me! If he doesn;t like it, its just tough luck.
I need to be tougher I think.