Is the Spousal Tax Split on Its Way Out? Klingbeil's Reform Plans and What's Really Behind Them

It's the tax model that has stood like a cornerstone for decades – but now it's facing a serious challenge. Lars Klingbeil, the strongman of the SPD, has an idea that's making many married couples sit up and take notice: he wants to abolish spousal tax splitting. Or at least reform it so drastically that it no longer fits the times. I remember discussions from years ago when this topic was treated like a taboo. Back then, the word was: "This is untouchable." Today, when the state has to watch every single euro, things suddenly look different.

Why Klingbeil has the spousal tax split in his sights

The reasoning Klingbeil gives is simple – but it hits the core of the issue. This model, where married couples are taxed jointly and their tax burden is pooled and redistributed, comes from an era when the woman usually stayed at home and the man was the sole breadwinner. Honestly, that's an outdated relic today. If you look closely, you quickly realise: Spousal tax splitting doesn't support the family, but rather a specific role model. It provides a massive benefit for couples with a large income gap – and in most cases, these are still the classic setups where the woman earns less or doesn't work at all.

Within the SPD, they've long believed that this model is a real roadblock to equality. And the numbers back them up. I recently looked at one of the major studies on this, published by a renowned economic research institute. It clearly shows: if spousal tax splitting were abolished, women's employment would increase by an average of up to eight percent. These aren't just fantasy numbers; these are concrete effects. Suddenly, it wouldn't be financially worthwhile for many couples to have one partner stay home just to get that tax advantage.

What this means for the birth rate – the opposite of what you might think

Now here's what's really surprising. Supporters of the split always say: "This is the backbone of the family, it secures children." But the reality is different. A study I read in a trade journal some time ago proved exactly the opposite. When the state stops rewarding unequal income distribution and instead invests in childcare options and real freedom of choice, the birth rate actually rises. It sounds paradoxical, but it makes sense: couples are more likely to have children if they know they can both work without being penalised by the tax system.

So the current debate about reforming spousal tax splitting is no longer purely about finances. It's about the fundamental question: does the state want to promote the traditional single-breadwinner marriage, or does it want to support modern lifestyles? I think many younger couples no longer even have that traditional image in their heads. They're asking themselves: why should I be at a tax disadvantage just because we both work full-time and send our kids to daycare?

• Fact 1: Spousal tax splitting costs the state billions in tax revenue every year.
• Fact 2: It only benefits couples with a large income gap – which are often those who don't actually need the help.
• Fact 3: Countries like Sweden or France have completely different models that boost both the birth rate and female employment.

The grand coalition of Union and SPD? A stumbling block called the FDP

But it won't happen that quickly. The party members know that too. Because while Klingbeil is gaining more and more support within the SPD, things look very different with the Union. For the CSU, spousal tax splitting is almost a sacred cow. But even if a future government could agree on something, the FDP is lying in wait. The liberals have already made this model a top priority. For them, tax incentives for marriage are a core component of their economic policy. I doubt such a law would pass through the upper house without a major political showdown.

But one thing must be made clear: simply abolishing it without a replacement scheme would be disastrous. If the split is scrapped, other relief measures must be introduced. Otherwise, the middle class would be the loser. And that's precisely what the behind-the-scenes negotiations are about right now. It's not about abolishing it for the sake of it, but about a reform that ultimately is fairer. Perhaps a family split that gives more weight to children. Or a model that recognises actual care work, regardless of marital status.

I'm telling you: the debate over spousal tax splitting is going to keep us busy in the coming months. Because it acts like a magnifying glass for the discussions happening across the country: how do we want to live, how do we want to work, and what is that actually worth to the state? Stay tuned – this is going to be a heated season.