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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

CMS application in ex’s circumstance

27 replies

ExpectantEs · 24/01/2026 11:25

Morning, Need some advice please! I have been a single mum since the conception of DD. She is now 19 months old and the love of my life. I am fortunate to be a homeowner and a high(ish) earner but not rich. E.g I don’t quality for child benefit but just about get 30 funded nursery hours. I feel comfortable with my bills but supporting myself on maternity leave alone drained my savings and I still have to be mindful of my spending.

Was in a relationship with DD’s dad for about 4 years. DD’s dad still lives at home with his parents and is probably on around £35k a year. He gives me £150 a month. I have asked for more but he says he is broke and cannot afford to. He also said he cannot afford to continue to nursery so I’ve had to manage that on my own. When DD was freshly born he told me (quite sternly) he doesn’t want to go on CMS and he would rather pay money into my account.

He has recently gotten engaged and is due to be married. His lifestyle doesn’t reflect as someone who is broke. His fiancé also has a daughter whom he is contributing towards.

Recently he said he is starting a business soon and in a few years he should be a very high earner and will be able to contribute more. It’s hard to know if he will ever give me more.

I’ve heard that men can sometimes avoid paying CMS and if he goes self employed that will be even easier for him to avoid paying it.

Do I apply for CMS and risk my secure £150 a month? Or should I wait it out and see if he contributes more when he has more money? Baring in mind he will have a wife and probably more children soon.

AIBU to now apply for CMS?

OP posts:
rosiebl · 24/01/2026 12:52

Have you used the calculator to work out how much he should be paying you on £35k income?

purpleygrey · 24/01/2026 13:46

How many nights does he have the child?
is he likely to go self employed?

ToKittyornottoKitty · 24/01/2026 13:48

What do you mean about nursery? Was he paying towards nursery or was he saying he can’t drop her off there anymore?

FancyBiscuitsLevel · 24/01/2026 14:21

assuming your dd doesn’t have overnights at her dads house, rough calculation even with another child in his home is more like £310 a month.

Put in a claim now. He’s been under paying. That new business might never appear.

ExpectantEs · 24/01/2026 15:03

@rosieblThe calculator says about £350 a month but I know that can vary

OP posts:
ExpectantEs · 24/01/2026 15:04

@purpleygreyhe has DD every other weekend. So 4 days a month

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ExpectantEs · 24/01/2026 15:04

@ToKittyornottoKittyhe doesn’t pay towards nursery and has never even seen the building!

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Reassurancells · 24/01/2026 15:05

Do the calculator and go through CMS.

that way there’s no messing around.

ExpectantEs · 24/01/2026 15:05

@FancyBiscuitsLevelhe has her maximum 4 - 6 nights a month. He hasn’t moved in with his fiancé yet and is still living at home with parents. But I am sure that will change.

it’s true. The business might never come

OP posts:
Penelope23145 · 24/01/2026 15:10

ExpectantEs · 24/01/2026 15:05

@FancyBiscuitsLevelhe has her maximum 4 - 6 nights a month. He hasn’t moved in with his fiancé yet and is still living at home with parents. But I am sure that will change.

it’s true. The business might never come

He doesn't even live with his fiancée but contributes to her daughters upkeep? How odd.

FancyBiscuitsLevel · 24/01/2026 15:16

Do it now before he moves in with his fiancée.

ExpectantEs · 24/01/2026 15:17

@Penelope23145I could be getting lied to!
It’s just a plethora of excuses every time I ask for more contributions.

OP posts:
UninitendedShark · 24/01/2026 15:22

I do think you should go through CMS as he is definitely under paying. That said with a woman incoming I’d be wary he’ll try going for 50/50 and palm your daughter off on the new wife to avoid paying at all. Seen it plenty of times.

Sprogonthetyne · 24/01/2026 15:28

Put in the application. It's not your money, it's your DD's. She is entitled to be supported by both parents. Think of the additional experiences or opportunities the extra £200 could give DD if he was made to pull his weight.

ExpectantEs · 24/01/2026 15:30

@UninitendedSharkIt’s a scary thought that this could happen. Especially as they’ve never lived together as I’ve been alone from the start. He’s gone weeks/months without seeing her. I hope he wouldn’t palm DD off with the new wife, but as she already has a daughter of her own, I can see her lifestyle may not change much.

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ExpectantEs · 24/01/2026 15:32

@SprogonthetyneI agree. There’s things I’ve opted out that would benefit her for in the sake of saving money. Also could make me less stressed as I’m doing everything, and a less stressed mum would be better for my baby.

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UninitendedShark · 24/01/2026 15:42

ExpectantEs · 24/01/2026 15:30

@UninitendedSharkIt’s a scary thought that this could happen. Especially as they’ve never lived together as I’ve been alone from the start. He’s gone weeks/months without seeing her. I hope he wouldn’t palm DD off with the new wife, but as she already has a daughter of her own, I can see her lifestyle may not change much.

This would be my fear too, but only you know how likely this is. You do see it on here a lot though. Would he bother going through the rigmarole of the courts? Just something to be aware of. Some parents (usually men) will do anything to not pay for their kids.

Hiphopboppertybop99 · 24/01/2026 15:47

I think I would try once more to ask him for more for your DD, you could try saying that with a wedding coming up etc he's not exactly as broke as he makes out and neither thatt or his upcoming wedding should be to the detriment of supporting his DD. If nothing is forthcoming then I would put in the CMS application ASAP.

MrsMoastyToasty · 24/01/2026 16:14

Stop listening to ex.
Do what is right for your DC.

OnlyMabelInTheBuilding · 24/01/2026 16:19

Go for CMS, but be aware, if he moves in with his fiancée and her child, the amount will be reduced if he declares this to them. And again, further if they have their own child

Ilovecakey · 24/01/2026 16:42

UninitendedShark · 24/01/2026 15:42

This would be my fear too, but only you know how likely this is. You do see it on here a lot though. Would he bother going through the rigmarole of the courts? Just something to be aware of. Some parents (usually men) will do anything to not pay for their kids.

But if shes living with him surely he would be paying more than he would pay in CMS?

averythinline · 24/01/2026 17:21

Just go to CMS ....you don't have to do what he says and sounds like his taking the piss anyway...if it changes in the future so be it but until it does he will at least be contributing a minimum amount...

ExpectantEs · 24/01/2026 21:32

I’ve applied! Thanks all

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Squeakydogtoy · 24/01/2026 21:46

So, in the eyes of the CMS, 2 nights a fortnight is the same as once a week (52 nights a year)

This is the minimum amount of nights needed for it to be used as "shared" parenting and these nights will be deducted from any maintenance awarded

My DS dad earned just under 35k, and I got £207 a month!!

It is a good idea to go through CMS though, because then it's official if/when he doesn't pay.

From experience, as soon as he's married, the payments will stop.

ExpectantEs · 24/01/2026 23:43

@SqueakydogtoyI think that’s roughly how much I would be getting for DD.

Your payments stopped once your DS dad got married? Are they allowed to just stop like that??

OP posts: