Income Tax 2026: Taxes, Wage Tax and Tax Returns in Germany

This article offers a clear guide to the key aspects of German income tax (Einkommensteuer, as of 2026) for employees: how wage tax (Lohnsteuer) is deducted, including the solidarity surcharge (Solidaritätszuschlag) and church tax (Kirchensteuer), which social security contributions apply and how they differ from your actual tax liability. We explain the six tax classes (Steuerklassen I to VI) and use a practical example to show how tax class I and tax class III compare in figures. We also explain who is required to file a tax return (mandatory assessment, Pflichtveranlagung) and which deadlines apply (e.g. 31 July 2026 for the 2025 tax return). Finally, we look at the consequences of filing late (late filing surcharge, Verspätungszuschlag, etc.). With this knowledge, employees can better understand their tax obligations, meet deadlines and, if needed, book a consultation with SN Advisory.

1. How do wage tax, the solidarity surcharge, church tax and income tax work?

• Wage tax as an advance payment on income tax: Employees pay wage tax every month via their employer. The employer automatically transfers this ‘withholding tax’ (Quellensteuer) to the tax office (Finanzamt). The amount depends on gross salary and the wage tax deduction criteria (Lohnsteuerabzugsmerkmale: tax class, allowances, religious affiliation). Formally, wage tax corresponds to the income tax an employee owes if their only income is from employment. If too much wage tax has been withheld during the year, you receive a refund through the annual wage tax adjustment (Lohnsteuerjahresausgleich) or your income tax return. If too little has been withheld, the difference must be paid afterwards.
• Solidarity surcharge (Soli): A solidarity surcharge of 5.5% is levied on income tax. Since 2021, however, it only applies to high incomes. Around 90% of employees no longer pay any Soli on their salary. Only those who pay a very large amount of wage tax still pay a proportionate Soli.
• Church tax: Church members additionally pay 8% or 9% church tax on the wage tax paid (depending on the federal state, or Bundesland). It is also deducted from salary every month.
• Social security contributions: Separately, employees must also pay social security contributions (Sozialversicherungsbeiträge) through their monthly deductions, covering health, long-term care, pension and unemployment insurance. In 2026, for example, the general health insurance contribution rate is a uniform 14.6% (employee share 7.3%, plus on average half of the additional contribution, or Zusatzbeitrag). On top of this come pension insurance at 18.6% (employee share 9.3%), long-term care insurance at 3.6% (employee share 1.8%) and unemployment insurance at 2.6% (employee share 1.3%). In total, social security contributions for employees usually amount to around 20 to 22% of gross earnings. Employers and employees each pay roughly half of these contributions. Some of the social security contributions paid can be claimed as special expenses (Sonderausgaben) to reduce your tax.
• Example payslip: If, say, a monthly gross salary of €3,000 is paid, around 15 to 20% goes on social security contributions (~€610), plus wage tax and church tax. For a single taxpayer in class I with €3,000 gross, that would be roughly €498 in wage tax per month (€5,971 a year in total) and approx. €45 in church tax (9% of €498). No Soli is due. Net pay (after tax, before social security contributions) would be around €2,457 here.

2. Tax classes I to VI: who belongs where?

Your tax class determines how monthly wage tax is deducted. As a rule of thumb, tax classes affect how the deductions are spread across the year, but not the annual tax actually owed. In detail, the following applies to employees:

• Class I: Single and divorced people (including spouses living permanently apart) as well as widowed people from the second year after the death of their spouse. Unmarried parents who are not entitled to the single parent relief (Entlastungsbetrag) also use class I (unless they specifically apply for class II as single parents).
• Class II: Unmarried single parents with at least one child living in their household. Class II automatically takes the single parent relief (€4,260 per year) into account.
• Class III: Married employees or registered civil partners, provided the other spouse opts for the less favourable class V. Widowed employees also automatically receive class III in the year of their spouse’s death (and the following year). Class III effectively works as a splitting rate: all of the couple’s allowances (basic tax-free allowance, or Grundfreibetrag, lump sums, etc.) are transferred to the higher-earning partner.
• Class IV: Married couples or registered civil partners with similar incomes. After marriage, both are automatically assigned to class IV. With the IV/IV combination, each partner keeps their own basic tax-free allowance.
• Class IV with factor: Instead of IV/IV, married couples can also choose the factor method (Faktorverfahren). The tax office calculates a factor that adjusts both partners’ wage tax deductions so that the result (wage tax) is closer to the splitting method. Example: Two partners earn €30,000 and €12,000 respectively. Without the factor, they are taxed separately (IV/IV), and their joint income tax is €4,342. With the factor, each is taxed monthly in such a way that a total of ~€4,339 in wage tax is withheld.
• Class V: The spouse of the person in class III falls into class V (no allowances of their own). Class V is only ever used together with class III.
• Class VI: Employees with several jobs at the same time. Class VI applies to the second and every further employment. There are no allowances here, and the deduction is very high.

Important: Tax classes only affect the monthly tax deduction, not the final annual tax. The III/V combination (with very unequal incomes), for example, does lead to significantly lower monthly deductions for the higher earner (class III) and higher deductions for the lower earner (class V). Ultimately, however, the correct tax is determined through joint assessment with spousal income splitting (Ehegattensplitting). This is the only way allowances and tax progression are balanced out correctly. The rule therefore is:

Choosing class III means more net pay each month, but when the tax is assessed at the end of the year, the couple always pays the same total amount of tax as if they had been assessed jointly.

3. Practical example: tax class I vs. III

Let’s look at a typical case to illustrate the differences. Person A earns €3,000 gross per month and has no children. We compare the monthly deductions and resulting net income in tax class I (single) versus tax class III (married, with a partner who earns very little or nothing and is in class V):

• Explanation: In class I, the full income is taxed as that of a single employee. In class III, the splitting method means that only very little wage tax is deducted, so net pay is higher. Over the year, this example gives annual wage tax of about €5,971 (class I) versus approx. €2,172 (class III). Church tax comes to €538 (I) or €195 (III) per year.
• Important: When the married couple files their income tax return, the actual tax is determined using the splitting method. In this example, that would be about €2,166 in annual tax. Under classes III/V, they would together have had €2,172 in wage tax (A) + €0 (B) = €2,172 withheld, so there is hardly any additional payment. If A were taxed as single (class I), he alone would pay €5,971 and would be due a refund, because as the sole earner in the couple, only €2,166 would be owed under splitting. This shows that the class III employee pays less each month, but the end result is the splitting tax. Overall, the tax burden for the couple stays the same: tax classes only shift the timing.

4. Who has to file a tax return in 2026?

Not every employee is obliged to submit a tax return. Here are the most important cases of mandatory assessment (2025 wage tax certificates, or Lohnsteuerbescheinigungen, with a filing deadline of 31 July 2026):

• Tax class combination III/V or IV with factor: Spouses with these class combinations are generally required to file an income tax return.
• Separate assessment despite marriage: If one spouse voluntarily files alone or a married couple opts for separate assessment, both must file a tax return.
• Wage tax allowance: Anyone who has had an allowance (Freibetrag) entered on their wage tax card (Lohnsteuerkarte) or via ELSTER, e.g. for commuting or maintaining a second household for work (doppelte Haushaltsführung), must file a return.
• Wage replacement benefits > €410: Anyone who received unemployment benefit, short-time work allowance (Kurzarbeitergeld), sickness benefit or similar of more than €410 in the year is obliged to file a return. (Otherwise, single people can treat up to €410 of wage replacement benefits as not counted.)
• Income without wage tax: Employees with additional income (from letting property or a side job) of more than €410 a year must file a return.
• Other cases: Investment income not subject to the flat-rate withholding tax (Abgeltungssteuer), income from a trade or agriculture (self-employed income), etc. also trigger the obligation to file.

If none of these grounds for mandatory filing apply, you can submit a tax return voluntarily (‘assessment on application’, or Antragsveranlagung) to get back any wage tax you may have overpaid.

5. Deadlines and consequences of not filing

• Filing deadline 2026: For the 2025 tax year, the deadline ended on 31 July 2026 (without a tax adviser). With professional tax advice, the deadline is generally extended to 1 March 2027. The same deadlines apply accordingly for 2026 (with filing then due by July 2027). You can apply to the tax office in writing for an extension.
• Late filing surcharge: If the tax return is submitted late, the tax office can impose a late filing surcharge. This amounts to at least €25 for each month or part month of delay (calculated on the assessed tax). Example: Anyone who submits a return due by 31 July only in March of the following year (8 months late) will be charged a surcharge of at least 8×€25 = €200. The surcharge can be higher if the assessed tax is large.
• Interest and penalties: In addition to the surcharge, interest may be charged on additional tax payments. In serious cases (wilful deception, tax evasion), fines may be imposed. Anyone who ignores the obligation to file also risks the tax office estimating their tax.

6. Practical tips and outlook for 2026

• Basic tax-free allowance 2026: The subsistence minimum remains tax-free. In 2026, the basic tax-free allowance is €12,348 (an increase on 2025). The child allowance (Kinderfreibetrag) in 2026 is €9,756 per child (per parent: €4.5k pro rata).
• Salary growth vs. taxes: Thanks to adjustments to the tax rate formula, inflation-related pay rises are not penalised in 2026. Anyone who earns more does not pay proportionally more tax than before.
• Choosing a tax class: For spouses with very different incomes, switching to III/V can bring more net pay in the short term, but (as shown) leads to additional payments if no tax return is filed. Spouses with similar incomes should usually stay in IV/IV or use the factor method.
• Keep your wage tax certificate: Every employee receives a wage tax certificate each year. You should keep it for your tax return. It contains all the key figures (annual gross pay, tax withheld, allowances).

For employees, it is important to understand that tax class and income tax in Germany are two separate matters: the class only governs the monthly deduction, while the actual tax is only finally calculated at the end of the year through the assessment (with splitting for married couples, where applicable). If you want clarity about your tax burden, for example through a sample calculation or for more complex allowances, you can book an appointment with a tax adviser or with SN Advisory. Professional help is especially worthwhile ahead of deadlines (31 July 2026 for the 2025 tax year).

Sources: We drew on official information from the Federal Ministry of Finance (Bundesfinanzministerium), the tax offices of North Rhine-Westphalia (NRW) and recognised tax advisory bodies. In particular, the BMF wage tax guidelines and explanatory notes and the publications of the NRW tax administration apply. All information is as of 2026.