German tax classes (Steuerklassen): what they are and which to pick

The one thing to internalize: class is a cash-flow dial, not a discount

Your Steuerklasse only tells your employer how much Lohnsteuer (wage tax) to withhold each month as a prepayment. It has zero effect on your actual annual income tax, which is fixed by your income, deductions and marital status and gets settled precisely in your Einkommensteuererklärung (tax return). Pick the "wrong" class and you either lend the state an interest-free loan all year (too much withheld, refund later) or under-withhold and owe a lump sum the following spring - but the total you owe across the year is identical either way. The only exceptions where class genuinely changes money in your pocket, permanently, are wage-replacement benefits calculated from net pay (which your payslip reflects) - Elterngeld (parental allowance), Arbeitslosengeld, Krankengeld, Mutterschaftsgeld - because those use your net salary at a specific reference point, not your eventual tax-return result. That's the one scenario worth actively gaming; more on it below.

The six classes at a glance

Legal basis: §38b Einkommensteuergesetz (EStG) defines all six classes and who qualifies for each.

How you get assigned a class as an expat

You don't apply for your first tax class - it's generated automatically. Anmeldung (address registration) at the Bürgeramt triggers issuance of your Steuer-Identifikationsnummer (tax ID) via the Bundeszentralamt für Steuern, and that ID feeds the ELStAM system (Elektronische LohnSteuerAbzugsMerkmale - "electronic wage tax deduction characteristics"), the central database employers query electronically. Single arrivals land in class I by default. Your new employer pulls your ELStAM record themselves once you give them your tax ID and date of birth - you hand over no paper Lohnsteuerkarte, that system was digitized years ago.

Married but the marriage happened abroad? A foreign marriage certificate is not automatically recognized for German payroll purposes. You (or your partner) must register the marriage at a German Standesamt (registry office) at either spouse's place of residence before class IV/IV is assigned - bring the foreign marriage certificate, both passports, and typically an apostille or consular legalization plus a certified translation if the document isn't in German or English. Until that registration lands in the Melderegister (civil registry) and propagates to ELStAM, both spouses stay on class I even though they're legally married. Budget several weeks for the paperwork chain, longer if the marriage country isn't in the Hague Apostille Convention and needs full consular legalization instead.

One spouse still abroad? If a spouse is registered outside Germany, the couple is treated as separated for payroll purposes and both usually stay class I - moving in together with a joint German Anmeldung is what triggers the automatic reassessment to IV/IV.

Married couples: III/V vs IV/IV vs IV with Faktor

This is the decision that actually matters for take-home pay. Three options, same eventual tax bill, very different monthly cash flow:

• III/V - the higher earner takes III (low withholding, near-double allowance), the lower earner takes V (heavy withholding, no allowance). Rule of thumb: worth it when one partner earns roughly 60% or more of the household's combined gross income. Concrete shape: a couple on €4,500 and €1,800 gross/month (71/29 split) sees the class-III earner keep several hundred euros more net per month than under IV/IV - real cash today, but the couple is legally required to file a joint tax return every year (§46 EStG) and frequently owes a back-payment the following spring, because III/V systematically under-withholds from the lower earner and over-relieves the higher one relative to their true combined liability.
• IV/IV - both spouses taxed individually as if single, each getting one standard Grundfreibetrag (€12,348 in 2026). Simplest option, assigned automatically on marriage registration, best fit when incomes are close to equal - no return-filing obligation is created by the class combination itself (though other triggers can still require one).
• IV + Faktor - both stay formally on class IV, but the Finanzamt calculates a factor (always ≤1) from your expected annual splitting-tax liability divided by the expected combined class-IV withholding, and your employer multiplies your class-IV tax by that number. Example: expected splitting tax €9,600/year against expected class-IV withholding €11,280/year gives a factor of 0.85. Result: monthly withholding tracks your real combined liability almost exactly, so there's rarely a large back-payment or a large refund - the return still has to be filed (Faktor combinations are also subject to Pflichtveranlagung), but the number on it is close to zero either way.

Applying for III/V, switching to IV/IV, or requesting the Faktor all happen on the same ELSTER form (see below); both spouses must sign or approve the request jointly.

Single parents: class II and the Entlastungsbetrag

Steuerklasse II is not automatic - even a genuinely single parent starts on class I and must actively request II via the Lohnsteuer-Ermäßigungsverfahren at their Finanzamt (or online through ELSTER). Requirements: at least one child who is registered at your address and for whom you receive Kindergeld or the Kinderfreibetrag, and no other adult who could form a Haushaltsgemeinschaft (shared household) with you - a partner moving in, even without marrying, can disqualify you. Get it and you're relieved of €4,260/year in taxable income (2026 rate, unchanged from 2024/25) plus €240/year for every additional child in the household, applied directly to monthly withholding rather than waiting for the return. This is one of the most commonly missed reliefs among expat single parents simply because nobody tells them it isn't automatic.

Second jobs: class VI, and why it looks brutal but isn't

Any second employment relationship (beyond a flat-taxed Minijob, currently capped at €603/month gross in 2026) is taxed under class VI by default: no Grundfreibetrag, no allowances, the steepest withholding curve of any class. It looks alarming on a first payslip, but it's a mechanical placeholder, not a punishment - the extra withholding gets fully reconciled and typically refunded when you file your annual return, since your true tax liability is calculated on total income regardless of which job it came through. If you forget to tell a new employer this is your second job, they're required to default you to VI anyway, so there's no way to "hide" a second income from the withholding system.

How to change your tax class

1. Check eligibility. Only married/civil-partnered couples (switching between III/V, IV/IV, IV+Faktor) and single parents (requesting II) can actively choose; unmarried, childless single filers stay on I with nothing to elect.
2. File via ELSTER (the free official portal, elster.de) using the "Antrag auf Steuerklassenwechsel bei Ehegatten/Lebenspartnern" for married couples or the Lohnsteuer-Ermäßigung/"Anlage Kind" route for class II. Paper form 034008 ("Antrag auf Lohnsteuer-Ermäßigung") at your local Finanzamt works too if you'd rather queue than register an ELSTER account. First-time ELSTER registration needs a certificate mailed to you, so budget several days before you can even submit.
3. Both spouses' signatures/consent are required for any III/V, IV/IV or Faktor change - one partner can't switch the combination unilaterally.
4. Timing: since 2020 there's no cap on how many times a year you can switch - theoretically monthly - and no reason needs to be given. A change takes effect the month after the Finanzamt processes it, not retroactively; budget one to two weeks for processing plus mail time.
5. The hard deadline: 30 November. To count for the current calendar year, your application must physically arrive at the Finanzamt by 30 November. Miss it and the new class only applies from January of the following year - the current year's withholding stays exactly as it was, and any correction has to wait for the tax return.

The Elterngeld trap: the timing rule almost nobody hears about in advance

If a class change ever matters for real money beyond monthly cash flow, it's this one. Elterngeld (Germany's parental allowance, typically 65-67% of prior net income, capped at €1,800/month) is calculated from the applicant's net salary in a 12-month reference period - and "net salary" there means whatever tax class you were actually on, not what you would've earned under an optimized one. Rule: the tax class change must take effect at least seven months before the month statutory maternity leave (Mutterschutz) begins, which in practice means acting the moment you suspect a pregnancy, not once it's confirmed - between the ELSTER processing lag and the "effective from next month" rule, waiting for a positive test can burn the window. Couples planning to have the lower earner take most of the parental leave should put that person on class III (or IV+Faktor with the higher earner on lower withholding is not equivalent - III is the one that maximizes reference-period net pay) well ahead of trying to conceive. Real-world swing: switching from V to III has been shown to lift monthly net pay by several hundred euros and total Elterngeld received over a year by roughly €4,000-4,500 in illustrative calculations - money that a same-year switch after the 7-month window closes simply cannot recover.

Widowed and divorced: what happens to your class

Your spouse's death doesn't need a form: the Finanzamt automatically reassigns the surviving spouse to class III from the first day of the following month, no application required, provided both were fully tax-liable in Germany and not permanently separated. This "Gnadensplitting" (widow's/widower's splitting) carries the class-III double Grundfreibetrag (€24,696 for 2026) through the year of death and the entire following calendar year - after that, you drop to class I (or II if a Kindergeld-qualifying child lives with you). Divorce works differently: you generally revert to class I (or II with a child) from the year after the divorce, unless your ex-spouse remarries and you're the one who "inherits" III eligibility in specific edge cases - this gets genuinely complicated, so anyone divorcing mid-tax-year should get a one-off consult rather than guess.

Edge cases: freelancers, students, cross-border, and moving abroad

• Freelancers and the self-employed (Freiberufler, Gewerbetreibende) don't have a Steuerklasse at all for their freelance income - that system only applies to Lohnsteuer on employment income. Self-employed tax is paid via quarterly Einkommensteuervorauszahlungen (advance payments) set by the Finanzamt based on your last return. If you also hold an employee job alongside freelancing, that employment income still runs through the normal class system (typically I, or VI if it's your second income stream).
• Students with part-time jobs: ordinary class I rules apply above the Minijob threshold; below €603/month gross the employer usually opts for flat 2% Pauschsteuer instead, which doesn't touch your Steuerklasse or show up on a tax return at all.
• One spouse moves abroad: from the year after either spouse re-registers a residence outside Germany, both are automatically reset to class I - moving back together and re-registering flips it back to IV/IV automatically from that month.
• EU vs non-EU: none of the class mechanics differ by nationality or visa type - ELStAM runs on tax residency and civil-registry marital status, not immigration status. A non-EU spouse joining later on a family reunification visa gets exactly the same automatic IV/IV once both are registered in Germany with the marriage recorded.
• Kirchensteuer (church tax): if you're registered with a tax-collecting church (mostly Catholic or Protestant), 8-9% (state-dependent) of your income tax is added on top regardless of class - it rides on whichever class you're in but isn't a class of its own.

Common mistakes

1. Assuming III/V "saves" tax. It doesn't - it only front-loads cash and usually creates a mandatory return with a back-payment. Couples who hate surprises should default to IV/IV or the Faktor option, not III/V.
2. Missing the 7-month Elterngeld deadline by waiting for a positive pregnancy test before filing the class change. By the time ELSTER processes it, the window is often already gone.
3. Not requesting class II because nobody at the Finanzamt volunteers it - it's opt-in, not automatic, even for a textbook-qualifying single parent.
4. Panicking over class VI on a new second job. It's a placeholder rate, fully reconciled at filing - not a penalty and not permanent.
5. Forgetting the marriage-registration step after a foreign wedding, then wondering why payroll still shows class I months later.
6. Filing the ELSTER class-change form solo for a III/V or Faktor switch - both spouses' consent is required; a one-sided submission gets rejected or delayed.
7. Missing 30 November and being stuck with the old class for the rest of the calendar year even though the paperwork is otherwise fine.
8. Treating the annual refund/back-payment as the real cost of the class rather than understanding it's just correcting withholding timing - the total annual tax is identical across III/V, IV/IV and IV+Faktor for the same household income.

Frequently asked questions