Calculation Methodology & Standards
Deterministic, reproducible, and verifiable financial living intelligence.
Zero-AI Financial Calculation Rule
LivWorthy strictly prohibits using generative AI or Large Language Models (LLMs) to estimate taxes, calculate cost of living, perform currency conversions, or derive disposable income. All calculations are executed by deterministic code operating on official statutory tables and validated statistical datasets.
The Calculation Pipeline
Inverse Solver Engine (Salary Needed)
To answer "What salary do I need to live in London or New York?", LivWorthy implements a bounded inverse root-finding algorithm. Given target housing, living costs, and desired savings, the engine solves backwards through the non-linear progressive tax brackets to establish the exact gross income needed.
Canonical Financial Terminology
Gross Salary
Total pre-tax cash compensation paid by an employer before statutory deductions.
Net Salary (Take-Home Pay)
The actual statutory cash earnings remaining after national, regional, and municipal taxes plus mandatory social contributions.
Effective Tax Rate
The actual percentage of total gross income paid in compulsory taxes and social contributions.
Marginal Tax Rate
The statutory tax percentage applied to the very last dollar (or currency unit) of earned income.
Cost of Living (COL)
The localized baseline financial expenditure required to sustain a defined standard of health, shelter, nutrition, and mobility.
Disposable Income
The remaining net income available after covering mandatory statutory taxes, shelter, and non-negotiable living necessities.