Useful when negotiating a salary or planning a move: if you know what you need to take home, this works backward — using the same real tax brackets as the Gross to Net calculator — to the gross salary figure to ask for.
How this is calculated
There's no simple algebra to invert progressive tax brackets, so this searches numerically: it tries gross salaries until the resulting net income (via the exact same tax calculation as the Gross to Net calculator) matches your target — guaranteeing the two calculators always agree with each other.
Use this alongside a real offer
Once you have an actual offer's gross figure, run it through the Gross to Net Salary Calculator to sanity-check whether it meets your target take-home.