Finance — Interest
6 articlesStatutory, maximum and late-payment interest — how to calculate, when to charge and how to claim payment.
Guides in this category
Statutory interest — rates and calculation
Statutory interest: when they apply, how to calculate, current rates and examples.
Interest note — how to issue and calculate
Interest note: when it is used, what it should include and how to calculate interest.
Tax interest — rules and calculation
Tax interest: when it applies, how to calculate and which rates apply.
ZUS interest — calculation rules
ZUS interest: when it arises, how to calculate and which rates apply.
Loan interest — how to calculate
Loan interest: formula, example and common mistakes.
Bank interest — deposits and capitalization
Bank interest: how to calculate deposits, capitalization and tax on profits.
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FAQ: Interest
Answers to the most common questions on this topic
Practical explanations covering loans, leasing, taxes, ZUS contributions, interest and taxation forms for sole traders. Each guide includes step descriptions, costs and calculators.
Compare: progressive scale (12%/32%), flat tax (19%) and lump-sum. The taxation comparison calculator helps pick the most favourable option for your income and costs.
Interest on a rental mortgage can be deducted from income. For a residential purchase — no deduction applies. The guide describes the rules in detail.
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