Parenting plan expenses: a worked split, step by step

What the money section of a parenting plan covers

Child support, where there is any, is set by rules in your state or country and usually paid on a schedule. The money section of a parenting plan is about everything on top: the school trip, the dentist, the football boots that are suddenly too small. Parenting plans that work tend to answer five questions.

1. Which costs are shared? A list beats a principle. “School trips, uninsured medical and dental, childcare, one club each term” is clearer than “reasonable extras”.
2. In what split? 50/50, in proportion to income, or a fixed percentage you agree.
3. Who decides before money is spent? A limit above which you ask first saves most arguments.
4. What proof is enough? Usually a photo of the receipt.
5. How fast is the other parent paid back? Within a month is common, and simpler as one transfer.

For what child support covers where you live, start with official guidance such as USA.gov’s child support page, which points to your state’s agency. This post deals only with the shared extras.

A worked example: one term of shared costs

Here is a term’s worth of receipts for an example household, two parents we’ll call Sam and Jordan. The amounts are illustrative, chosen to make the arithmetic easy to follow, and every figure below is worked out by the same code that keeps the balance in ParentHelm’s shared expense log.

Sam paid $203 and Jordan paid $206, out of $409 in total.

The 50/50 result

At an even split each parent should carry $204.50. Line by line, Jordan owes Sam half of everything Sam paid for, and Sam owes Jordan half of everything Jordan paid for. Net it off and Sam owes Jordan just $1.50.

That is the first lesson of keeping a log. Six receipts, and the whole term comes down to one transfer the price of a coffee. Without the log, it is easy for each parent to remember their own receipts and come away sure they are owed about $101.50.

How do you split child expenses by income?

Add the two incomes together and take each parent’s share of the total. If Sam earns $60,000 and Jordan earns $40,000, Sam’s share is 60% and Jordan’s is 40%. Every shared cost is then divided in that ratio.

Same receipts, very different answer: at 60/40, Sam sends Jordan $42.40 instead of $1.50. Neither is more “right”. The split is a decision you make once, in the plan, so you never have to argue about it receipt by receipt.

You can run your own numbers in the free expense split calculator. Choose 50/50, By income or Agreed %, list what each of you paid, and it gives one figure.

A note on cents

ParentHelm rounds each expense once, to the cent, and adds up the rounded lines. That way the balance on screen always equals the sum of the lines both parents can see. It sounds fussy. It is the difference between “the app says $42.40” and “but my maths says $42.39”.

Writing the expenses part of your parenting plan

Here is a plain-English shape many parents start from when they write this part of a parenting plan. It is not legal wording, and a mediator or lawyer can help you adapt it.

Our parenting plan checklist covers the rest of the plan, from the weekly schedule to holidays and travel, and prints a summary you can take to mediation.

What if your parenting plan says nothing about expenses?

Plenty of parenting plans were written in a hurry, or years ago, and say nothing about shared costs. That does not mean you have to wait for the next big bill to find out what you each think.

Start small. Agree the list of shared costs and the split for the next school term only, write it down in a short email you both reply to, and keep the receipts in one place. At the end of the term, look at the tally together. If it worked, add it to the parenting plan. If it didn’t, you have real numbers to talk about instead of memories.

If your plan came from a court, or you cannot agree, a mediator can help you add an expenses section properly. Changing a court order is a legal step, so take advice where you live before treating an informal agreement as a change to it.

How to keep shared expenses from becoming a row

In ParentHelm’s expense log, the parent who paid presses Add an expense, fills in What was it for?, the amount, Who paid?, the category and the split (Half each by default), and attaches a photo or PDF of the receipt. The other parent sees it straight away and can press Agree this expense, so every line carries its own “Agreed” or “Not agreed yet”. When money changes hands, Record a payment takes it off the balance, and the balance reads “All square” once you are even.

A line logged by mistake can be withdrawn with a reason, such as “Logged twice”. It stays in the record, struck through, and stops counting towards the balance, so nothing quietly disappears. Both of you can read and agree the log for free. Each month, a parent without Pro can add 10 expenses; ParentHelm Pro ($4.99 a month) removes that limit for the parent who buys it.

Common pitfalls with shared child expenses

• Settling every receipt separately. Six receipts, six transfers, six chances to disagree. Net them off monthly.
• No limit for asking first. The row is rarely about the $35 trip. It is about the $600 trip nobody asked about.
• Mixing child support with extras. Keep them in separate places so neither gets mistaken for the other.
• Receipts in a camera roll. Attach them to the line, or they will be gone when you need them.
• Changing the split by stealth. If incomes change, agree a new split from a date, in writing, and add it to the parenting plan.

If the schedule is still up for discussion too, our custody schedule comparison shows how seven patterns differ over a year.

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