The case owner pays once per case from the wallet (the amount is shown on the button, normally CHF 250). Unlocking applies to all phases, present and future, and makes the General tab read-only. If the balance is sufficient, confirm and the amount is charged. If not, the button leads to the wallet, which shows how much is missing: after topping up, return to the case and confirm the unlocking.

The administrator always sees it. Collaborators and observers see the notice but cannot unlock. Parents with limited access do not see the Result tab.

The calculation follows the order of BGE 147 III 265 cons. 7.3:
1. cash maintenance of minor children (direct costs and care balancing payment);
2. care maintenance;
3. spousal maintenance (indicative);
4. adult children in education;
5. only at the end, sharing of the surplus.
At each level everyone's debt-enforcement subsistence minimum is covered first, then the extended family-law minimum. If the means are not enough, it is the later levels that remain uncovered (under-coverage). The «How the amount is reached» section follows the same order.

The box at the top shows the monthly amount and who pays it to whom. The result does not depend on who is Parent 1 or Parent 2: swapping the roles gives the same amount, in the same direction. If neither parent has means to pay, «No transfer possible» appears and the under-coverage is shown.

Family allowances and child pensions are attributed to the parent who receives them (Child data tab). If the paying parent receives them, they are already included in the amount to be paid: the box shows «of which CHF … received by …». If the receiving parent receives them, the box shows the amount received directly and the total available for the children. Legal basis: Art. 285a CC.

Surplus taken into account, the children's share and the amount paid by the paying parent; any savings rate deducted.

Their maintenance is not included in the amount at the top: it has its own section, «Adult children in education — maintenance owed to the child». For each child: needs, allowances and own income, and for each parent the contribution, the costs they already bear directly (e.g. housing and food if the child lives with them) and the amount to pay to the child. Any uncovered part is shown (Art. 287a CC). The rules are described in the help for the PRO tab.

It offsets the difference between the care shares: it goes to the parent who cares more for the children and is borne by the other, whatever their role (Parent 1 or 2) in the case. The care value and any deviations are set in the PRO tab (Custody and care).

Care maintenance covers the needs of the parent who looks after the children to the extent that childcare prevents them from covering those needs with their own income (art. 285 para. 2 CC; BGE 144 III 377). It has two parts:
Base part (priority 3): subsistence minimum of the caring parent × reference share of 50 % × share of their gainful activity prevented by childcare (from the custody plan and the school-level model, BGE 144 III 481), at most their shortfall. It comes right after the cash maintenance of minor children.
Dynamic part (priority 4): the remaining shortfall, at most the same amount as the base part. It is owed only if the paying parent still has capacity after the earlier priorities, and in proportion to that capacity.
In a shortfall, only the part the paying parent can afford without encroaching on their subsistence minimum is paid; the unpayable base part is shown as the shortfall. The split into two parts and the 50 % share are a parameter of the method, not a rule of law: the share can be changed in the PRO tab, with a justification.

If the paying parent's means are not enough to cover the maintenance owed, the difference is shown as under-coverage, shared among the children in proportion to their needs. The missing amount must be stated in the agreement or the decision (Art. 287a CC). Maintenance for minor children takes priority over spousal maintenance (Art. 276a CC).

If there are deviations in the PRO tab, the result lists them with reason and justification. A hypothetical income appears in the income line marked «hypothetical, PRO tab».

For married parents the system shows an estimate in brackets, with the split between spouses set in the PRO tab (reference: half each). It is indicative: it does not change child maintenance and must be agreed by the parties or decided by the court, which also considers the length of the marriage and the prospects of returning to work. If spousal maintenance is excluded in the PRO tab, the estimate does not appear (Art. 125 CC; BGE 147 III 249). If in the PRO tab it is capped at a maximum or fixed (e.g. standard of living before the separation, one-step concrete method for very high incomes), the estimate shows the applied amount and, below it, the calculated one.

The complete calculation with all items. The document language can be chosen.

Choose the sections to include: cover page, family composition, calculation summary, care plan, operative part, professional's choices, data record, methodology, legal references, list of attachments, digital signature. The document language can be chosen.

When the phase is closed the two PDFs become certified: the version is saved, with a QR code and a SHA-256 hash that let anyone (judge, lawyer, party) check that the document has not been changed. The digital signature is available only in the certified version.