Four free calculators with current parameters — each on its own page, with an explanation of how the calculation actually works:
Flat-rate tax calculator
Monthly tax and contributions by activity — IT, consulting, design, education, trades. Including the reduction for new businesses.
Calculate flat-rate →Gross to net salary
Convert gross to net salary and back, with income tax, contributions and the total cost to the employer.
Calculate salary →Freelancer calculator
Model A or Model B — tax and contributions on quarterly income, and which model costs you less.
Compare models →Annual income tax
Whether you are liable for 2025 and how much the tax comes to — with personal allowances and the relief for under-40s.
Check liability →Who are these calculators for?
The flat-rate tax calculator is for anyone planning to register a flat-rate business in Serbia or wanting to check their assessment — for IT activity (code 6201) it uses the national average, so the figure is very close to exact. The gross-to-net calculator is used by both employees and employers budgeting salaries. The freelancer calculator compares Model A and Model B for quarterly reporting of income from abroad. The annual income tax calculator shows whether you crossed the 5,439,096 RSD threshold for 2025 and what the tax comes to — that return is due by 15 May 2026.
Not sure what suits you best — freelancing, flat-rate, full bookkeeping or an LLC? See our guides for entrepreneurs or get in touch — 35 years of experience with flat-rate taxpayers, IT entrepreneurs and LLCs in Novi Sad, and we work in English.
Note: these calculators are informational. The exact flat-rate liability is set by a decision of the Tax Administration.