Free tools
Online tools and calculators
Free calculators for accounting and business — they run in the browser, no account needed.
Statutory interest calculator
Compute statutory late-payment interest, commercial-transaction interest and tax interest. Amount, dates, result — instantly.
Payroll calculator
Gross/net figures with ZUS contributions, income tax and deductible costs. See what actually lands in the account.
Tax-form comparison
Progressive scale, flat tax and lump-sum side by side — tax, contributions and net income for your business.
Contract comparison
Employment, mandate, specific-task and B2B — net, gross and employer cost for each contract type.