When the 30% Rent Rule Doesn't Apply in Germany

The 30% rule is a rule of thumb, not a legal requirement. For a meaningful share of tenant households in Germany, it simply doesn't apply, because a different rule or a different income situation takes over. If you receive Bürgergeld, BAföG, or Wohngeld, or earn well above average, treating 30% as a fixed target is the wrong approach.

Bürgergeld: reasonable costs, not a fixed percentage

No percentage rule applies to Bürgergeld households. Under Section 22(1) of Book II of the Social Code (SGB II), the actual costs of accommodation and heating are covered, as long as they're considered reasonable. What counts as reasonable isn't tied to income at all. It's based on apartment size and the locally typical comparison rents in the relevant municipality. Newly approved claims also get a one-year grace period (Karenzzeit), during which actual housing costs are recognized in full regardless of whether they'd otherwise count as reasonable. The 30% rule is beside the point here, since the Jobcenter checks the rent amount directly rather than its share of income.

BAföG: a fixed housing allowance, not a percentage

Students receiving BAföG who don't live with their parents get a housing cost allowance of 380 euros a month under Section 13(2) of the Federal Training Assistance Act (BAföG), raised from 360 euros by the 2024 BAföG reform. Students still living with their parents get only 59 euros instead. This allowance is a fixed amount that often doesn't fully cover the actual Warmmiete, particularly in expensive university cities. For BAföG recipients, the 30% rule offers little guidance: the relevant BAföG income is usually already low, so 30% of it would barely cover a realistic rent anyway. What matters is the fixed allowance, not a share of an overall budget.

Wohngeld: a formula, not a rule of thumb

Tenants who receive Wohngeld, because their income is too low to cover full rent but too high to qualify for Bürgergeld, benefit from their own calculation formula under Section 19 of the Housing Allowance Act (WoGG). It weighs household size, income, and the eligible rent together, instead of simply deducting a percentage from income. The eligible rent itself is also capped through seven regional rent levels (Mietenstufen, Section 12 WoGG), tied to local rent levels: Mietenstufe I applies to particularly low-cost regions, Mietenstufe VII to the most expensive cities. Here too, a differentiated formula replaces the simple 30% rule of thumb.

High earners: the rule becomes too conservative

At the upper end of the income distribution, the problem flips: the 30% rule overstates how much housing-cost buffer is actually needed. According to a DIW Berlin analysis (Wochenbericht 41/2024), the lowest-earning 20% of tenant households spent around 36% of their income on rent on average in 2021, while the highest-earning 20% spent only about 22%. People earning well above average can typically afford a more expensive apartment without cutting back elsewhere, even if the rent share exceeds 30%. For comparison, a Destatis survey put the average rent-to-income ratio across all tenant households at 27.8% in 2022, and at 32.7% for single-person households. That national picture is part of a wider trend covered in our overview of what renting costs across Germany.

What this means for your own budget

The 30% rule remains a useful starting point for middle-income households not receiving social benefits. For everyone else: Bürgergeld households should look at their municipality's reasonableness threshold, BAföG recipients at the fixed housing allowance, Wohngeld recipients at the WoGG formula, and high earners at their actual budget rather than a rigid percentage. For a broader look at what German households actually spend on rent, see our breakdown of real rent-to-income data by household type, and if Bürgergeld's reasonableness threshold applies to you, our worked income-bracket examples cover the standard case in more detail. Anyone who qualifies for reduced-cost housing themselves can find the details in our guide to social housing in Germany.

Frequently Asked Questions

Does the 30% rule apply to Bürgergeld recipients?

No. Under Section 22(1) SGB II, actual housing costs are covered as long as they're reasonable. What counts is the local comparison rent, not a percentage of income.

How much is the BAföG housing allowance?

Since the 2024 BAföG reform, students not living with their parents receive 380 euros a month under Section 13(2) BAföG, up from 360 euros previously.

Why doesn't the 30% rule work as a guide for Wohngeld recipients?

Wohngeld is calculated using its own formula (Section 19 WoGG) based on income, household size, and eligible rent, further capped by seven regional rent levels (Section 12 WoGG).

Do lower earners actually spend a bigger share of their income on rent?

Yes. According to DIW Berlin, the lowest-earning 20% of tenant households spent around 36% of their income on rent in 2021, compared to about 22% for the highest-earning 20%.