You and your partner both start jobs in Germany on identical salaries, and somehow your colleague, married to a non-working spouse, takes home hundreds of euros more each month on the same gross. He is not paid more. He is in a different tax class, and that single setting, assigned almost invisibly, is quietly redistributing everyone's monthly cash flow. The Steuerklasse is the lever almost nobody explains and everybody is affected by.
German tax classes confuse newcomers because they sound like they change how much tax you pay, when really they change when you pay it, monthly withholding versus year-end settlement. Get your class right and your monthly net matches your reality. Get it wrong and you either lend the state money interest-free all year or face a surprise bill. Here is how the six classes actually work.
The six classes
Every employee is assigned a Steuerklasse, and it determines how much Lohnsteuer (wage tax) is withheld each month, the single biggest influence on the net figure on your payslip.
| Class | Who it is for |
|---|---|
| 1 | Single, divorced, or widowed, no children |
| 2 | Single parents (includes a relief amount) |
| 3 | Married, the higher earner (paired with a class 5 spouse) |
| 4 | Married, both spouses (default, for similar incomes) |
| 5 | Married, the lower earner (paired with a class 3 spouse) |
| 6 | A second (or further) job, highest withholding |
If you are single with no kids, you are class 1, and there is nothing to optimise. The interesting decisions are for married couples (and registered partners), and for anyone with a second job landing in class 6.
The married-couple choice: 3/5 vs 4/4
Married couples and registered partners choose how to combine their classes, and this is where real monthly money moves.
4/4 (the default). Both spouses are in class 4, taxed equally. This suits couples with similar incomes, the withholding is balanced and neither over- nor under-pays much.
3/5. The higher earner takes class 3 (lower withholding, more take-home) and the lower earner takes class 5 (higher withholding, less take-home). This suits a large income gap, especially a sole or main earner, because it front-loads more net to the household during the year.
4-with-factor (Faktorverfahren). A refinement of 4/4 that uses a factor to split the withholding more accurately between spouses, reducing year-end surprises.
The combination changes the monthly split between the two of you, and the household's overall monthly cash flow, but not the total tax owed for the year.
The key insight: class changes cash flow, not total tax
This is the point that defuses most tax-class anxiety: your final annual tax does not depend on your class. It is settled by your tax return at year end.
The class only changes how much is withheld each month during the year. So:
- A class that over-withholds means smaller monthly net but a refund when you file.
- A class that under-withholds means bigger monthly net but a possible bill when you file.
For a 3/5 couple in particular, the higher monthly take-home often comes with a year-end reconciliation, because the withholding was an estimate. The total they owe across the year is the same as if they had been 4/4; only the timing differed. Choose your class for the cash-flow pattern you want, not in the belief it changes the total.
When and why to change
You can change your tax class at the Finanzamt (local tax office), usually with a simple form, and the change takes effect from the following month. Married couples can switch their combination, more than once a year now under current rules.
Common reasons to change:
- You marry: you move from class 1 to a couple combination, and choose 4/4, 3/5, or factor.
- Your income balance shifts: if one spouse starts earning much more or less, the optimal combination changes.
- Parental leave is coming: tax class affects the net income that Elterngeld is calculated from, so couples sometimes adjust class in advance so the parent taking leave shows a higher net, raising the benefit. This is a genuine, legal planning move worth knowing before the baby arrives, not after.
A wrong or outdated class is one of the most common payslip issues for newcomers, you marry but stay class 1, or your combination no longer fits your incomes. Checking and correcting it is a quick Finanzamt task.
A quick decision guide
To orient yourself fast:
- Single, no kids: class 1, nothing to do.
- Single parent: class 2, claim it for the relief amount.
- Married, similar incomes: 4/4 (or 4-with-factor for accuracy).
- Married, big income gap or one main earner: 3/5 for more monthly household net, accepting a year-end reconciliation.
- Planning parental leave: review the class so the parent taking leave shows the higher net before the calculation period.
- Second job: it will be class 6 (high withholding); the return reconciles it.
Whatever you choose, remember the return is the great equaliser: it corrects any mismatch. The class is about managing your monthly money, with the parental-leave case being the one place it can genuinely change a benefit amount.
What to do this week
- Check your current Steuerklasse on your payslip and confirm it matches your real status (single, married, single parent).
- If you are a married couple, decide whether 4/4 or 3/5 fits your income balance, remembering it changes monthly cash flow, not the annual total.
- If parental leave is on the horizon, look into adjusting class in advance, since it can affect the net income Elterngeld is based on.
