Not Married (Yet)? Germany's Tax System Treats Your Family Very Differently

The Official Rule

Couples who’ve built a genuine family life together in Germany, sometimes with years of shared history and children, but without a registered marriage or civil partnership, often assume the tax system treats them roughly the same as married couples once enough time or commitment has passed. It doesn’t, and understanding the actual gap matters for your household budget.

Ehegattensplitting, the tax-splitting mechanism that benefits married couples with unequal incomes, is legally reserved specifically for married couples and registered civil partnerships. According to ING’s own explainer comparing unmarried cohabitation to marriage, unmarried couples cannot access this benefit at all, there’s no length-of-relationship threshold, no cohabitation duration, and no number of shared children that unlocks it otherwise.

Without a registered marriage or partnership, each partner is automatically placed in Steuerklasse I, or Steuerklasse II specifically if you’re genuinely a single parent living alone with your child, and taxed entirely as an individual. There’s no joint filing option available to you at all, none of the mechanisms married couples in Germany can use to reduce their combined household tax burden when one partner earns meaningfully more than the other.

This gap is real, calculable money, not an abstract policy difference. ZDFheute’s own explainer with concrete figures describes an unmarried couple where one partner earns 70,000 euros and the other 30,000 euros paying roughly 2,000 euros more in combined tax than an equivalent married couple would under the same income split. The bigger the income gap between partners, the larger this specific disadvantage tends to grow, since Ehegattensplitting is specifically designed to benefit couples with unequal incomes.

Your children, importantly, face zero disadvantage from your marital status specifically. They have identical rights to Kindergeld and other child benefits as children of married parents, this isn’t a benefit tied to parental marital status at all. The Kinderfreibetrag itself is simply split 50/50 between unmarried parents by default, a mechanism that applies the same way regardless of whether you’re living together or have separated, it’s tied to legal parenthood, not marriage.

What Real People Say

Unmarried couples with children describe genuinely being surprised by the actual tax gap once they calculated it concretely, the assumption that “we’re basically the same as a married couple in practice” tends to dissolve once a real number, like the roughly 2,000 euro example, makes the difference tangible rather than abstract.

The reassurance that children face zero disadvantage regardless of parental marital status comes up as a genuinely important, separate point people want confirmed directly, since the tax gap affecting the parents themselves can otherwise create anxiety about whether the children’s own benefits are somehow affected too, they aren’t.

Step by Step

1. Don’t assume years together or shared children grant access to Ehegattensplitting, only marriage or a registered civil partnership does.
2. Understand you’ll each be taxed individually under Steuerklasse I (or II for a genuine single parent), with no joint filing option.
3. Calculate your actual tax gap if your incomes differ significantly, the disadvantage grows with a larger income gap between partners.
4. Don’t worry about your children’s Kindergeld or benefit rights, those are identical regardless of your marital status.
5. Confirm the Kinderfreibetrag is being split 50/50 between you as unmarried parents, this applies whether you’re together or separated.

Compliance Note

This page explains the general tax treatment of unmarried couples in Germany, current as of mid-2026. It is not tax advice. Your specific financial situation should be assessed individually, consult a Steuerberater for guidance tailored to your household.