fam-calc Unterhaltsrechner

About fam-calc Unterhaltsrechner

fam-calc calmly and transparently calculates a family's financial needs: child support, parental allowance, the fair division of shared expenses, and parental leave planning. Four calculators in one app, completely offline, ad-free, and no registration required.

THE CALCULATORS

• Child support – from adjusted net income to the payment amount per child: income bracket, age group, offsetting of half of the child benefit, adjustments for more or fewer eligible children, needs-based control amount, and minimum subsistence allowance. Based on the Düsseldorf Table 2026 (Higher Regional Court of Düsseldorf, as of January 1, 2026) and the relevant guidelines.

• Parental allowance – basic parental allowance and parental allowance plus based on your net income before birth: replacement rate, sibling bonus, multiple birth supplement, minimum and maximum amounts, and benefit duration over time (Federal Parental Allowance and Parental Leave Act).

• Fairly dividing expenses – three models side-by-side: 50/50, income-based, and "equal remainder." Here's a concrete proposal outlining how much each parent contributes to the shared account each month.

• Plan parental leave (Pro) – Distribute basic parental allowance, parental allowance plus, and the partnership bonus across months 1 to 36 for both parents simultaneously. The eligibility check according to the Federal Parental Allowance and Parental Leave Act (BEEG) runs continuously and notifies you of any benefits that would not be approved – without blocking your progress.

EVERY NUMBER IS TRANSPARABLE
Every result includes a detailed breakdown of the calculation – line by line, with the relevant paragraph or guideline number, and the data source. This is exactly what you need if you want to discuss the results instead of just taking them at face value.


The eligibility check according to the Federal Parental Allowance and Parental Leave Act (BEEG) runs continuously and reports any ineligibility – without blocking your progress. FEATURES

• Live calculation as you type, a results chart for each child, diagrams for distribution and benefit duration
• Warnings when things get critical: insufficient income, reduction in benefits, maximum amount, income limit

• Knowledge tab: key terms briefly explained, each entry with source

• Tap and read technical terms directly in the calculator

• German and English, light and dark mode

• Share results as text; the last entry for each calculator is saved

• Links on the app icon for child support, parental allowance, and cost sharing

PRIVACY FIRST
fam-calc deliberately does NOT require internet access. All calculations run 100% on your device – nothing is transmitted, nothing is collected, no advertising, no tracking. This is crucial when dealing with separation and family matters.

fam-calc Pro (optional one-time purchase, no subscription)

• Parental leave planner – allocate the months and see what the final amount will be: maternity leave with the calculation according to Section 3 of the Federal Parental Allowance and Parental Leave Act (BEEG), the net household income per month, the additional tax due to the progression clause per calendar year (Section 32b of the German Income Tax Act (EStG)), and the deadlines for registering with your employer. Compare up to three plans and save everything as a PDF.

• PDF export – entries, adjustments, calculations, and results neatly formatted on paper: for taking with you, filing, and sharing.

• Adjustment assistant – nine guided items from net income to adjusted income, from work-related expenses to visitation costs. Each step is explained with a guideline number.

• Shortfall scenario and ranking – the proportional distribution when the income is insufficient for everyone.

• Adult children, blended families with more than three children, the child's own income, and vocational training allowances.

• Save cases under your own name and directly compare two cases.

Child support, parental allowance, and cost-sharing calculations remain completely free of charge; the basic calculation is not affected.

Note: fam-calc uses published tables, guidelines, and laws (as of 2026) and provides non-binding guidance. The app does not replace legal advice—it is intended as a basis for discussions with a lawyer, youth welfare office, or court. The family court makes the final decision in individual cases.

fam-calc is part of the LT.Apps family, which also includes fin-calc (financial calculator), pet-calc (pet costs), and cur-calc (currency calculator): offline, ad-free, no tracking, one-time purchase instead of a subscription.