When your employer lets you take a company car home and use it for anything beyond commuting and business trips, German tax law treats that private use as extra pay you never actually see in your bank account, the geldwerter Vorteil. The easiest way to tax it, and the one this calculator uses, is the pauschale 1%-Regelung under § 6 Abs. 1 Nr. 4 EStG: a flat monthly percentage of the Bruttolistenpreis, added straight to your taxable income every month, whether you drove the car twice or every single day.
Bruttolistenpreis matters more than most people expect. It's the manufacturer's list price including VAT and factory-fitted extras on the day the car was first registered, not whatever your employer actually negotiated, financed, or leased it for. A heavily discounted new car, or a two-year-old used one, is still taxed on its original full list price. On top of the base rate, a further commute add-on (0.03% of list price per one-way kilometer between home and your first place of work, for a combustion vehicle) is added every month if you use the car to commute.
Fully electric vehicles get a real break: 0.25% instead of 1% for a list price up to €100.000, or 0.5%above that, with the commute add-on scaled down the same way. Plug-in hybrids don't get this automatically; they need a minimum electric range or CO2 threshold to qualify, otherwise they're taxed like any petrol or diesel car, so check your specific model before assuming the reduced rate applies.
What this calculator does not do: it only prices the income tax, Solidaritätszuschlag, and church tax cost of the benefit-in-kind. In most real payroll setups, statutory social insurance (Rentenversicherung, Krankenversicherung, Arbeitslosenversicherung, Pflegeversicherung) is also charged on a company car's geldwerter Vorteil, so your actual net cost usually runs a little higher than the number shown here. If you keep a meticulous logbook (Fahrtenbuch) of every trip instead, you can be taxed on the real private-use share rather than the flat rate, worth checking with a Steuerberater if your mileage is mostly business.