My husband and I both work. It absolutely is not worth me working any more than my part time 25 hours. Universal Credit doesn't give you £1+45p, they DEDUCT 55p of every £1 you earn over your personal allowance. You keep 45p of the £1 you earned.
So let's pretend I'm offered overtime, would I like 3 more hours each day to bring me up to full time? It will require putting the children in after school club so let's see.
3 hours at £13 per hour is £39
20% is lost to tax (I'll ignore NI and pension), that leaves £31.20
55% of this is deducted from my universal credit, leaving £14.04
3 children in after school club @£12.50 each is £37.50 of which UC covers 85%, my share is £5.63. Very generous but now I'm down to £8.41
and as it's now so late in the day I have to get a bus home rather than walk, so I have time to feed the kids and do their homework. That's £8 for the 4 of us... oh look, I've made 41p for working 3 hours.
No thanks. What would be the point? Children stuck in childcare for hours, the stress of running around to get to them on time and get everything done, less family time. When the children are older, maybe, but there's no incentive as things stand currently. Pretending people aren't doing this is ridiculous.
For reference, our income varies but on average our take home pay is around £3700 per month (around £52000 per year pre tax and NI) and we get roughly £700 in universal credit. That is going to increase by around £390 next month due to the child cap being lifted. It's a mad amount of money.
Due to the 55% deduction you make very little by working more hours if you're on a low wage and the amount you would have to earn to reduce the UC payment to £0 and be free from the benefits trap would be almost double the amount of UC you receive, then even higher to account for tax etc. Simply unattainable for many.