Method and limitations
Personal income tax (SZJA) is 15% of the income. Income is either 90% of the rent received (the 10% flat cost allowance, no invoices needed) or the rent minus costs proven by invoices (itemised: for example renovation, utilities and building fees the landlord pays, depreciation). The calculator works out both and recommends the lower. Individuals letting long term pay no social contribution tax (szocho) on this income. Tax advances are due quarterly, by the 12th of the month after the quarter; the calculator assumes rent comes in evenly.
Not a tax return. Doesn't cover VAT, letting as a sole trader, short-term accommodation (e.g. Airbnb), tax withheld by a company paying you, or whether a cost is actually deductible.
This calculator is for information only. It is not legal, tax, financial or credit advice.