Guides
Every figure in these guides is computed by the calculator engines or taken from their cited primary sources — IRS, SSA, DOL and state agencies — with verification dates.
Employee
How to read your paycheck, line by line
Every line of a US paycheck explained from the engine's library
Employee · Guides · Paychecks, Pay stubs, Federal withholding, FICA
Published
Employer
Wage bases, new-employer rates, experience rating, industry-average states
Employer · Guides · SUTA, Unemployment insurance, Employer cost
Published
Self-Employed
1099 quarterly estimated taxes
The 4 dates (IRC §6654) and how each payment is computed
Self-Employed · Deadlines · 1099, Quarterly estimates, Self-employment tax
Published
Methodology
Pub. 15-T federal withholding, annualized state tax, cumulative FICA, §224 flow-through, state data status
Methodology · Methodology · Paychecks, Federal withholding, FICA, State tax
Published
SUTA rates, FUTA credit status, workers' comp ranges, benefits assumptions
Methodology · Methodology · Employer cost, FUTA, SUTA, Workers' comp
Published
SE tax, half-SE deduction, simplified QBI, quarterly installments
Methodology · Methodology · Self-employment tax, 1099, Quarterly estimates, QBI deduction
Published
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- 1099 (2)
- Employer cost (2)
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- FICA (2)
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- Pay stubs (1)
- Paychecks (2)
- QBI deduction (1)
- Quarterly estimates (2)
- Self-employment tax (2)
- State tax (1)
- SUTA (2)
- Unemployment insurance (1)
- Workers' comp (1)
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