Solidarity Surcharge (Solidaritätszuschlag) in Germany: Who Still Pays It?

The Solidaritätszuschlag (solidarity surcharge) remains a significant tax obligation for many Germans in 2026, despite ongoing political debate about its necessity. Originally introduced to fund German reunification, this 5.5% surcharge on income tax continues to affect high earners, business owners, and investors—though the threshold for paying it has risen considerably. Understanding who still pays the Soli and how much they owe is crucial for managing your tax liability effectively.

What Is the Solidaritätszuschlag?

The Solidaritätszuschlag is a supplementary tax levied on top of your regular income tax. Introduced in 1991 to support the costs of German reunification, it was originally meant to be temporary but has remained in place for over three decades. The surcharge is calculated at 5.5% of your assessed income tax, though not everyone pays the full rate.

In 2021, the German government introduced a major reform that effectively eliminated the Soli for approximately 90% of taxpayers. However, this wasn't a complete abolition—rather, it introduced exemption thresholds and graduated collection methods that significantly reduced the number of people affected.

2026 Solidarity Surcharge Thresholds: Who Pays and Who Doesn't

The Exemption Threshold (Freigrenze)

The most important change for 2026 is the increase in the exemption threshold. You don't pay any Solidaritätszuschlag if your annual income tax falls below these limits:

• €20,350 for single taxpayers (Einzelveranlagung)
• €40,700 for married couples filing jointly (Zusammenveranlagung)

This represents an increase from 2025, when the thresholds were €19,950 and €39,900 respectively. These exemption thresholds have been rising annually since 2023, providing progressive relief to lower and middle-income earners.

The Mitigation Zone (Milderungszone)

If your income tax exceeds the exemption threshold, you don't immediately pay the full 5.5% surcharge. Instead, a graduated system applies in what's called the "mitigation zone". In this zone, the surcharge is calculated using a special formula: it cannot exceed 11.9% of the difference between your income tax and the exemption threshold.

This means the surcharge increases gradually from 0% to the full 5.5% rate, rather than jumping suddenly. This graduated approach ensures that middle-income earners experience a gentler transition to the full surcharge rate.

Example: How the Calculation Works

Consider a single self-employed craftsperson with an assessed income tax of €30,000 in 2026:

• Exemption threshold: €20,350
• Amount above threshold: €9,650
• Surcharge calculation (using the mitigation zone): €9,650 × 11.9% = €1,148.35
• Total Solidaritätszuschlag due: approximately €1,150

In contrast, a single taxpayer with an income tax of just €19,950 would pay zero Soli, while someone earning significantly more would eventually pay the full 5.5% rate once they exit the mitigation zone.

Who Is Still Affected by the Solidarity Surcharge?

High Earners (Spitzenverdiener)

The primary group still paying the full Solidaritätszuschlag comprises high earners. According to current regulations, unmarried individuals with annual income tax exceeding approximately €74,569 and married couples with income tax over €149,138 are considered "Soli-liable" and pay the surcharge in full.

Business Owners and Self-Employed Individuals

Self-employed professionals, freelancers, and business owners are disproportionately affected. Many fall into the higher income brackets where the full 5.5% surcharge applies. If you're self-employed, you'll need to account for the Soli when calculating your tax liability to the Finanzamt (tax authority).

Limited Companies (GmbHs) and Corporations

Limited liability companies (GmbHs) and other corporate entities continue to pay the Solidaritätszuschlag without exemption or mitigation. There are no thresholds or graduated rates for businesses—they pay the full 5.5% surcharge on their corporate income tax.

Capital Investors

Investors receive particular attention under Soli rules. The surcharge applies to capital gains tax (Kapitalertragsteuer) at a rate of 5.5%, which effectively increases the total tax burden on investment income to approximately 26.375% (25% capital gains tax plus 5.5% Soli). Banks automatically withhold and remit this surcharge without requiring action from the investor.

Monthly Income Tax Thresholds for Employees

If you're an employee, your employer withholds income tax monthly. The monthly exemption thresholds for 2026 are:

• €1,695.83 per month for single employees
• €3,391.67 per month for married couples with combined income

These monthly figures help determine whether your employer should withhold Soli from your salary. Most employees won't reach these thresholds and therefore won't have Soli withheld.

Recent Legal Developments

The Solidaritätszuschlag has faced ongoing constitutional challenges. In March 2025, Germany's Federal Constitutional Court (Bundesverfassungsgericht) rejected a constitutional complaint from six FDP Bundestag members, ruling that the continued collection of the Soli is justified. The court determined that a "reunification-related additional financial need" still exists for the federal government, justifying the surcharge's continuation.

This decision underscores the Soli's importance to the federal budget, which receives approximately €12.5 billion annually from this surcharge. Despite ongoing political debate about its necessity, the surcharge remains firmly embedded in Germany's tax system.

How to Check If You Owe the Solidarity Surcharge

Your Steuerbescheid (tax assessment notice) from the Finanzamt will clearly show whether you owe Solidaritätszuschlag and how much. Look for the line item "Solidaritätszuschlag" on your assessment. If you're self-employed or have complex income sources, your tax advisor or accountant can calculate your liability.

For employees, check your payslip (Gehaltsabrechnung). If Soli has been withheld, it will appear as a separate line item. Most employees won't see this deduction, as their income tax falls below the exemption threshold.

Planning Ahead: What You Should Do Now

If you're a high earner, business owner, or investor, understanding your Soli liability is essential for effective tax planning. Consider these steps:

• Review your most recent Steuerbescheid to confirm whether you're paying Soli and at what rate
• If you're self-employed, factor Soli into your quarterly tax payment calculations
• Consult a Steuerberater (tax advisor) if your income situation is complex or if you're approaching the exemption threshold
• Monitor future changes to exemption thresholds—they typically increase annually, potentially reducing your liability
• For investors, consider the Soli impact when evaluating investment returns; the effective tax rate on capital gains is higher than the nominal 25% capital gains tax rate

The Solidaritätszuschlag remains a real tax obligation for millions of Germans, but the expanding exemption thresholds and graduated mitigation zones mean that fewer people pay the full rate each year. By understanding these rules and planning accordingly, you can manage your tax liability more effectively and ensure you're not overpaying.