XP and I want to work out our own maintenance agreement. What are the things we need to factor into working out an agreed amount?
(DS's residency split, because I guess it's relevant, is 10 days/nights with me per fortnight, and four days with his dad.)
We agree on the obvious things - such as tallying up direct expenditure on DS (school dinners, trips, clothes, swimming lessons, etc) across several months, and splitting this figure between us. But there are some grey areas we don't agree on/don't understand.
I work the equivalent of three days per week across four days (a bit more in term-time to accrue time off in lieu in the holidays/when DS is sick), so most days, can take DS to school/pick him up. I also tend to have DS more in the holidays than his dad does; although his dad could have him more, DS is happier sticking to our usual routine, which includes one weekday per week with his dad.
Because of my work, combined with a bit of help from nearby grandparents, I/we have no childcare costs. I have suggested to XP that my not working full-time and being around for DS before/after school and during holidays incurs a DS-related cost to me (of lost income). XP isn't having this, because he says it's also my choice and that I could work more hours ... well, I could, but then we'd incur childcare costs! My understanding was that we had both agreed it was best for DS if I could be around before/after school/in the school holidays as much as possible while DS is pretty young.
Another grey area is that I once posted on here (under a different name) about maintenance, and someone suggested that because I have DS most of the time and therefore pay for most stuff for him, XP should pay for more than half the costs of raising DS. I don't understand this. How would that be fair to XP? Shouldn't we both simply pay half the costs of raising DS? I don't know ...
Someone also suggested XP should pay towards DS's share of household bills (electricity, gas, water - even mortgage) - this hadn't occurred to me, and XP's view is that he pays for these things for DS when he's with him, so they're not so relevant.
So has anyone else come up with their own ways of calculating maintenance, and how have you addressed these more abstract costs of raising a child (reduced income to cover childcare, household bills, etc)?
Thanks.