Our Core Principles
- Official sources only: All tax rates are drawn from government publications, not third-party summaries.
- Conservative estimates: Where rates vary by bracket or situation, we default to the most commonly applicable scenario and clearly note exceptions.
- Client-side calculation: All math happens in your browser. Your data never touches our servers.
- Quarterly review: Every calculator is audited at minimum once per quarter against official sources.
- Disclaimer on every page: All tools are estimation instruments. We always recommend consulting a licensed tax professional for official filings.
1. Freelance Hourly Rate Calculator
The formula used is a reverse-engineering approach from desired net income:
- Target Net Income: Your desired annual take-home pay after taxes and expenses.
- Annual Expenses: Software, hardware, insurance, accounting, marketing, co-working.
- Effective Tax Rate: User-entered or country-estimated (e.g., 25% US default, 15.3% SE tax).
- Working Weeks: 52 minus planned vacation and sick weeks (default: 48 weeks).
- Utilization Rate: The percentage of working hours you can bill (typically 60–80% for freelancers).
2. Platform Fee Calculator
Platform fees are sourced directly from each platform’s official Help Center documentation and verified at least quarterly:
| Platform | Freelancer Fee (2026) | Official Source |
|---|---|---|
| Upwork | 10% flat rate (as of May 2023) | help.upwork.com — Service Fee |
| Fiverr | 20% of each order | help.fiverr.com — Revenue & Payments |
| Toptal | No direct fee; hourly rate set by platform | toptal.com/freelance |
| Payoneer | 1% for Upwork withdrawals; 3.99% cross-currency | payoneer.com/fees |
| Stripe | 2.9% + $0.30 per successful card charge | stripe.com/pricing |
| PayPal | 3.49% + fixed fee (commercial transactions) | paypal.com/fees |
* Rates last verified: July 2026. Platform policies may change. Always check the official platform Help Center before finalising quotes.
3. Serbian Freelance Tax Calculator
Based on the Serbian Tax Administration’s official self-employment rules for the 2026 fiscal year. Two models are supported:
- Model A (Lump-Sum / Paušal): Tax is calculated on a standardised revenue base determined by municipality and business type, with fixed PIO (26%) and health insurance (10.3%) contributions applied to a minimum base of RSD 34,140 (2026 monthly base).
- Model B (Self-Assessment / Agencija): Tax is calculated on actual income minus a 34% normative cost deduction, with 10% income tax on the net base, plus pension (26%) and health contributions on the declared base.
Source: Poreska uprava Republike Srbije (Serbian Tax Administration) — purs.gov.rs
4. Russian NPD Self-Employment Tax Calculator
Based on Federal Law No. 422-FZ «On the Experiment Establishing a Special Tax Regime ‘Professional Income Tax’»:
- 4% rate: Applied to income from physical individuals (B2C).
- 6% rate: Applied to income from organisations and individual entrepreneurs (B2B).
- Tax deduction bonus: 10,000 ₽ one-time bonus reduces effective B2C rate to 3% and B2B to 4% until the bonus is consumed.
- Annual cap: 2,400,000 ₽ (approximately $27,000 USD). Exceeding this cap requires switching to a different tax regime.
Source: Federal Tax Service of Russia (FNS) — npd.nalog.ru
5. Project Profitability Calculator
Effective Hourly Rate = (Revenue − Direct Expenses) ÷ Total Hours Worked
Labor cost is calculated as: Total Hours Worked × Target Hourly Rate. This allows freelancers to see whether a fixed-price project actually paid their desired rate or fell below it due to scope creep.
6. Retainer Package Calculator
Overage Rate = Hourly Rate × Overage Multiplier (default: 1.25× to 1.5×)
Important Disclaimer
All calculators on FreelancerCalculator.com are estimation tools only. They are not a substitute for professional tax advice, legal counsel, or certified financial planning. Tax laws change frequently and vary by individual circumstances. Always consult a licensed accountant or tax advisor for official tax filings and financial decisions. FreelancerCalculator.com and its founder Sarmad accept no liability for financial decisions made based on these tools.