Changing Your Tax Class at Career Start: When It Pays Off

With your first salary, the question arises whether your tax class (Steuerklasse) still fits. If you are single and have only one job, you are placed in tax class I, and there is usually nothing you can change about that. A change is mainly relevant for married couples. It mainly shifts your monthly deductions, not the tax for the whole year. An overview of the terms can be found in the glossary entry on payroll tax class.

The Key Points

• You cannot choose your tax class freely. It depends on your marital status and your situation (§ 38b Abs. 1 EStG).
• For married couples, the combination, such as III/V or IV/IV, determines the monthly deductions.
• A change mainly affects the monthly advance payment of payroll tax.
• The final tax is determined in the tax assessment (Veranlagung), that is, in your tax return (§ 46 EStG).
• If you hold several jobs at the same time, the second job usually falls into class VI.

Which Tax Classes Exist

The Income Tax Act assigns every employment to one of six classes. The table below shows the typical cases that matter for career starters.

When a Change Is Possible at All

For single people there is hardly a reason to change, because class I is the statutory classification. The topic becomes relevant when you marry, become a single parent, live permanently separated or take on a second job. The basis for the classification then changes, and the question of the right class arises anew. Timing matters: report changes in your marital status to the tax office promptly so that the classification can be adjusted. Children also have an effect. Minor children are taken into account in classes I to IV with a child factor (Zähler) (§ 38b Abs. 2 EStG).

Married: III/V or IV/IV?

Married couples essentially choose between two combinations. You should decide together, because the choice affects both incomes. With III/V, the higher earner in class III pays little payroll tax each month, while the other partner in class V pays considerably more. This shifts liquidity within the month. Whether you end up with a back payment or a refund only becomes clear in the tax assessment.

IV/IV generally fits when both partners earn similar amounts. A factor method (Faktorverfahren) within class IV can adjust the monthly advance payment more precisely to the expected annual tax. If you switch from III/V to IV/IV, one spouse alone can file the application, after which both are placed in class IV (§ 38b Abs. 3 Satz 2 EStG).

When a Change Pays Off and When It Does Not

• A change is more likely to make sense if married couples earn very different amounts and the monthly deduction clearly does not fit their situation.
• A change is less likely to make sense if both earn similar amounts. The change then usually achieves little.
• It becomes critical if you only want to increase your net amount each month. A back payment at year end is then often likely.
• Under joint assessment, the annual tax for the couple is in principle independent of the combination. The classes mainly determine how much is withheld each month.

If You Become a Single Parent or Have a Second Job

Single parents can be placed in class II. This gives them the relief amount, which reduces the monthly deduction base. You must meet the requirements, and the tax office determines the classification. If you hold two jobs at the same time, the second employer usually applies class VI. This deduction is considerably higher than in class I, because class VI does not include the basic tax-free allowance (Grundfreibetrag). For this reason, it is worth checking your payslips.

What Happens at Year End

If you have paid payroll tax, you can file a tax return. The tax office then calculates the actual tax and refunds overpaid payroll tax or requests back payments. A tax assessment is provided for, among other cases, if you received wages from several employers (§ 46 Abs. 2 Nr. 2 EStG). Without your own work-related expenses (Werbungskosten), the tax office automatically deducts the employee lump-sum allowance (Arbeitnehmer-Pauschbetrag) of 1,230 euros (§ 9a EStG, as of October 2026). Even if you are not obliged to file a tax return, a voluntary return can pay off once you have work-related expenses, such as commuting costs or professional literature. For more on your first pay statement, see the guide Understanding your first payslip.

Typical Mistakes You Can Avoid

Many problems arise not from the tax class itself but from missing or incorrect information. The most common mistakes are:

• A change such as marriage, separation or single parenthood is not reported to the tax office, so the class no longer matches your life situation.
• A second job is not reported, even though class VI should apply to it. A back payment may then arise at year end.
• The tax class is changed only to get a higher net amount, without planning for a back payment the following year.
• Payslips are not checked. Errors often only come to light in the tax return, when they are hardly correctable any more.

If you briefly check your payslip every month, you will spot discrepancies early. This saves trouble and often time with the tax office.

Frequently Asked Questions

Can I choose my tax class myself at any time?

No. The classification depends on your marital status and your situation (§ 38b Abs. 1 EStG). You can only deviate on application, and only in the cases provided for by law (§ 38b Abs. 3 EStG). You may also choose a less favourable class, although in practice that rarely makes sense.

Where do I submit the application?

You submit the application to the responsible tax office on the official form. It must be signed by hand (§ 38b Abs. 3 Satz 3 EStG). The details are then passed electronically to the Federal Central Tax Office (Bundeszentralamt für Steuern), which makes the tax characteristics available to the employer (§ 39e EStG).

Does the tax class affect child benefit or pension?

Child benefit (Kindergeld) does not depend on the tax class, but on conditions such as the child’s age and training. Pension contributions are based on your gross earnings. The tax class therefore does not change your pension entitlement.

Do I have to act straight after the wedding?

No, you do not have to act immediately. After the wedding, the Federal Central Tax Office (Bundeszentralamt für Steuern) automatically sets tax class IV for both spouses, provided both are subject to unlimited tax liability and do not live permanently separated (§ 39e para. 3 sentence 3 EStG). It receives the marital status from the registration office. If you want classes III and V instead, you submit an application to the tax office. The deadline for your tax return is not affected.

How to Proceed Now

1. Check your payslip and make sure the tax class entered matches your marital status.
2. Run a net example. You can find the tax calculator of the German Federal Ministry of Finance at bmf-steuerrechner.de.
3. If you are married, compare the combinations III/V and IV/IV and check whether a factor method suits you.
4. Submit the application on the official form to the tax office and, if needed, file your tax return.
5. For unclear cases, seek help from a payroll tax assistance service or a tax adviser.

Related Articles

• Understanding your first payslip: gross, net, deductions
• Tax class at career start: which one applies to you?
• Net salary 2026 as a career starter: example calculations
• Glossary: payroll tax class explained simply

Sources: Income Tax Act (EStG), § 38b, accessed October 2026, Income Tax Act (EStG), § 46, accessed October 2026, Income Tax Act (EStG), § 39e, accessed October 2026, Income Tax Act (EStG), § 9a, accessed October 2026, Tax calculator of the German Federal Ministry of Finance, accessed October 2026

Stand: October 2026. This guide is general information and not individual advice.