Germany Tax Classes Explained: Which Steuerklasse Saves You the Most?

Germany's Steuerklasse (tax class) system confuses almost every expat. Your tax class doesn't change your total annual tax bill — but it drastically changes your monthly take-home pay. Choosing the wrong class means lending the government thousands of euros interest-free all year. Here's how to get it right.

The 6 tax classes at a glance

The difference between Class 1 and Class 3 on the same salary is €410/month — nearly €5,000/year more in your pocket.

Class 1: The default for single people

If you're unmarried, divorced, or your spouse lives abroad, you're automatically placed in Class 1. It's the baseline — no special advantages or disadvantages. This is what most expats start with.

Class 3/5: The married couple power move

This is where the real money is. If you're married and one spouse earns significantly more than the other, the higher earner takes Class 3 and the lower earner takes Class 5. The result:

The bigger the income gap between spouses, the bigger the monthly advantage. If one spouse doesn't work at all, switching to 3/5 is a no-brainer.

Class 4 with factor (Faktorverfahren)

Since 2010, married couples can choose "Class 4 with factor" — a hybrid that distributes tax more fairly based on actual income proportions. It avoids the Class 5 problem of very high monthly deductions on the lower earner's paycheck while still optimizing monthly withholding. Ask your Finanzamt about it if 3/5 feels too aggressive.

Class 2: Single parents get a bonus

Single parents receive an additional Entlastungsbetrag (relief amount) of €4,260 plus €240 for each additional child. This reduces taxable income and results in about €100-150 more per month compared to Class 1.

How to change your tax class

Married couples can switch tax classes by filing a joint application at the local Finanzamt. Since 2023, you can change your class multiple times per year (previously limited to once). The change typically takes effect the following month.

You'll need:

• Marriage certificate (with German translation if necessary)
• Both spouses' tax IDs
• Form "Antrag auf Steuerklassenwechsel" (available at the Finanzamt or online via ELSTER)

Common expat mistakes

• Not switching after marriage: Many expats get married but stay in Class 1 for months because they don't know they need to proactively change. You're losing hundreds per month.
• Spouse abroad: If your spouse lives outside Germany, you may still qualify for Class 3 — but only if they live in the EU/EEA or Switzerland. Non-EU spouses don't qualify.
• Forgetting to file a tax return: If you use Class 3/5, you're required to file an annual tax return. Don't skip it.