If your take home pay was 5k a month, would you do this?

I would definitely stay in the job with flexibility particularly as you are on your own .
Another poster has worked out that although you would earn 1k more, by the time you take into account , parking, petrol, the odd lunch and coffee , you are not much better off

If your wraparound is good and the new job seems to understand about flexible working when children are sick, and you need to attend school events, then I would be taking it.
If not then it isn't worth the stress!

l would do it seeing as your DD is in nursery anyway. Surely the only difference is you working from an office rather than at home?
I think employers are more flexible to family life now, people who wfh act as if it’s chained to the office all day. People regularly come in late or leave early if they have something going on at the school , it’s not a massive deal.

I would take flexibility over a pay increase whilst dc are at primary - there is always bloody something e.g Christmas show, celebration assembly, end of year play, summer celebration, sports day, school finishing at 2pm instead of 3pm before Christmas and summer hols, sending child home at the first sign of a sniffle. If you don’t feel it will harm your prospects too much and you are managing fine on the pay you are on then I would stick until they start secondary.

Absolutely i would do it. £5k as a net salary on a 4 day week is a very high income. It gives you options and other forms of flexibility. A 9-4 work day is also not long.

One would have to tighten one's belt rather a lot.

Having raised DS very much on my
own, I would pay £1000 to keep the current level of flexibility. It adds a lot of stress not being able to work from home when they are ill, one needs the dentist or a repair is needed at home. You end using your annual leave for things that don’t give much value and then you will have to pay more for holiday care.

First things first id go back & see if I could negotiate more WFH days.

If not then,
Parking (15x4x4) - £2408
Lunch - £4 a day-ish. £64 (or the PITA of making a packed lunch)
Petrol - Let's say a tank a month £60.
Plus the lost time driving each way.

You're losing WFH, flexibility and a role/ company you say you like for, what, £125 a week? and you say things are okay i.e. You're not desperate for the cash.
Is your child at school yet? I found flexibility invaluable for assemblies, sports day, work sharing etc.

The unknown of the new company v the known perks of the current set up would make this a no for me.

Edit for weird formatting.

If you are on your own it would be wise to keep the flexible role. And taking into consideration travel expenses and so on. No stay where you are for now.

I did exactly this! The additional money relieves lots of stress as a single parent, I have healthy rainy day savings, pay for great holidays and take us off to the theatre etc without batting an eye lid. My DD was in wraparound regardless so it made no difference to childcare time or costs.
I don’t have worry about things breaking down or how I’ll afford to get jobs in the house done.

Absolutely, go for it. Do not ever pass up opportunities to increase your earning power if there is no massive trade off.
if you are not happy after a year, look elsewhere but with this salary you will be able to get same or step up somewhere else, maybe with more WFH days

Personally I would do it. That's a lot of extra income and only 4 days a week in the office (if I've read that right). DC already in childcare, you already go into the office. How many days do you currently do in the office?

15 x 4 days x 46 weeks (exc. hols) = £2,760 p.a.

add petrol costs
add lunches - even packed lunches will cost more than lunch at home
add decent professional clothes - can't slob around the office in 'athleisure'.

No, it is not worth it, and that is before considering the lack of flexibility.

Absolutely i’d take it.

I'd stay in the job thats got the most flexibility currently as a single mum of a young child. I don't think you can put a price on that and the less stress it brings.

Mother of 3 and 2 you with a partner here.

I would decline the new role UNLESS you can negotiate flex.

My oldest will start school on September and its going to introduce a lot of logistical challenges. You need to be around a lot in September and half the CMs near me dont drive or do pick ups 🙈

your current role has a lot going for it....I think the fact youare a known / proven quantity is also valuable vs a new role where you need to "prove yourself"

I wouldn't, as a single parent with no support.

Absolutely yes!

I'd go for it. Helps career progression, get more into pension, pay off mortgage. Even with the parking it's a huge plus

How will you do school pick-ups? I'd be tempted to take it!

I would take it considering DC is already in childcare.

I wouldn't do it. Flexibility has no price when your kids are young

Is there significant commuting involved in the new job? 9-4, 4 days a week is not too bad, worth £1000 extra a month. And when you say it's not flexible, does that refer strictly to days in the office? Or would it allow you to, for example, leave early to go to a sports day and make up the hours in the evening? In some jobs it's just not possible. I would take the job if it required office presence but was otherwise relaxed and flexible.

How old is DD?
And would school holidays be ok?

Id take it if you arexaboutvto leave primary, not if you are down in KS1.