Methodology and Assumptions
This section explains how calculations and reference information on this site are constructed, which assumptions are applied, and what limitations exist.
Purpose of this methodology
This site provides reference‑level information about salary structures, taxation, social contributions, and employment systems.
The objective is clarity and comparability, not personalisation or optimisation.
Reference‑based approach
All calculations are based on a standardised reference model.
A fixed set of assumptions is applied consistently across systems to allow structural comparison without individual variability.
Personal circumstances, eligibility conditions, and special regimes are not modelled.
Core assumptions
- standard private‑sector employee
- single individual
- tax and social‑security resident
- no dependents
- no special status (disability, exemptions)
- no additional deductions or credits
- no voluntary contributions
- no non‑salary income
- no benefits‑in‑kind
Calculations are performed on an annual basis, with monthly values shown for convenience.
Tax and contribution treatment
Calculations distinguish between:
- income tax
- employee social contributions
- statutory or occupational pensions
- employer contributions
Only statutorily defined contributions are included. Optional or employer-specific elements are excluded.
Use of statutory data
All calculations use public statutory sources, including legislation and official publications.
Where systems are complex, simplified reference rules are applied consistently.
Values are tied to a specific period and may change over time.
Simplification by design
Simplification supports:
- comparability
- transparency
- auditability
- consistency
Excluded elements include:
- household-specific rules
- regional variations
- temporary measures
- transitional provisions
- administrative discretion
Their exclusion does not imply absence in real systems.
Interpretation of results
Outputs illustrate:
- how gross salary is reduced
- how deductions are distributed
- how systems differ structurally
Results are not predictions and must not be used for personal decisions or compliance.
Reference‑audited calculators
Certain calculators use fixed reference models with documented assumptions and version-controlled updates.
Updates require new versions and documented re‑validation.
Relationship to professional advice
This site does not provide legal, tax, or accounting advice.
Users should consult official authorities or qualified professionals for binding guidance.
Scope of applicability
This methodology applies only to this site’s calculators and content.
It does not apply to external tools or third‑party resources.
Update Policy
Content is reviewed periodically.
Tax rates, contribution systems, salary thresholds and social-security rules may change over time. While efforts are made to keep information current, users should verify important information using official sources.
Summary
This site is a neutral European reference explaining how systems work, not how individuals should act.
Consistent methodology and clearly defined limitations ensure reliability.