Unfortunately he doesn't owe you for the time he wasn't being payed, as crappy that it is that he would shirk his responsibilities he would qualify for the nil rate of child maintenance. When/if he starts earning again is when he has to pay.
My ex used to pay the bare minimum.towards our child when he was working. He then decided he didn't want to work because he didn't have to (bank of mum was enough). So I have not been getting any money for a number of months. He told me few days ago he will possibly be starting a job next month.
The way he used to pay was firecy into my bank. Not through an agency and we would calculate the amout by using the online child maintanance calculator.
My question is if he goes back to work does he have to pay me money he owees me for the months he wasn't working or will he have to start paying as usual?