What this tool models
The decoder adds entered tax lines, benefit deductions, and other deductions, then subtracts the total from gross pay. It does not read or upload a real statement.
Interactive Learning Tool
Pay Stub Decoder
Explore how common fictional pay-stub lines combine into gross pay, deductions, and net pay.
This tool models user-entered assumptions for education. It does not recommend a financial decision.
Last reviewed:
What you enter
Enter a fictional gross-pay amount and optional deduction lines. Blank deduction fields are treated as zero. Do not enter names, addresses, tax IDs, or account numbers.
Mode A
Explore a fictional example
Fictional educational example. Values do not represent current tax rules or a specific worker.
Gross pay$2,000
Federal withholding-$200
State withholding-$100
Health benefit-$50
Net pay$1,650
Modeled result
Entered pay-stub breakdown
Line-by-line explanation
Current period: The entered values describe one modeled pay period.
Year to date: A real pay stub may also show accumulated totals; this tool does not calculate them.
Pre-tax and post-tax: The labels organize entered deductions but do not calculate their legal tax treatment.
Direct deposit: Net pay may be deposited into an account, but this tool never asks for account details.
Formula explanation
Total entered taxes = federal + state + local + Social Security + Medicare.
Benefits and other deductions = health + retirement + other pre-tax + other post-tax.
Net pay = gross pay − total deductions.
Deduction share = total deductions ÷ gross pay × 100.
Assumptions
- All values represent one fictional pay period.
- Blank deduction inputs equal zero.
- Entered labels are added exactly as shown.
Limitations
- The tool does not determine whether a payroll amount is legally or tax-correct.
- It does not calculate actual taxes or year-to-date totals.
- It does not upload, scan, photograph, parse, or store a pay stub.
What this teaches
The result shows how multiple payroll lines combine between gross and net pay and why the deposited amount can differ from gross earnings.
Continue learning
Related lessons, tools, and practice
Sources
Official sources support the educational definitions. Calculations use the simplified formulas shown on this page.
Educational boundary
Financial Intelligence Lab provides simplified educational information, calculators, and games. This page does not provide individualized financial, investment, tax, legal, credit, student-loan, insurance, housing, retirement, career, business, or budgeting advice. Examples and formulas use simplified assumptions. Actual costs, taxes, rates, benefits, laws, eligibility rules, and personal circumstances vary.