Gross pay comes before deductions
Gross pay is the compensation calculated before taxes, benefits, garnishments or other deductions. It may include regular wages, overtime, bonuses, commissions and differentials.
Net pay is the amount after deductions
Net pay depends on tax withholding, elections, benefits and payroll-specific adjustments. A generic calculator cannot know these values unless the user supplies them or the tool maintains current jurisdiction-specific data.
Use estimates carefully
A percentage-based deduction estimate is useful for budgeting but should not be presented as an exact tax calculation. Compare estimates with actual pay statements and update assumptions when circumstances change.