How often does PayslipIQ refresh tax tables?

Federal tables annually in December for the following calendar year. State tables annually plus within 30 days of any mid-year statutory change. Pay stub laws within 60 days of effective date.

Are PayslipIQ's calculators audited?

Each calculator function is unit-tested against IRS Publication 15-T examples and state-published worksheets. We do not currently undergo external audit.

How do I report a content error?

Email content@payslipiq.com with the URL and a description. We log corrections and post a monthly summary.

Where do PayslipIQ's federal numbers come from?

IRS Publication 15-T, Topic 751, annual revenue procedures, and SSA annual notices. Each topic page links to its primary source.

PayslipIQ, Understand Your Paycheck With Confidence

Where every number on PayslipIQ comes from, how often it is refreshed, and the editorial standards we hold ourselves to.

Where the numbers come from

Topic	Source
Federal income tax withholding	IRS Publication 15-T (current year)
Social Security wage base	Social Security Administration annual notice
Medicare tax	IRS Topic 751
Additional Medicare Tax thresholds	IRS regulations
Standard deduction	IRS annual inflation adjustment
401(k) contribution limits	IRS annual notice
HSA / FSA limits	IRS Revenue Procedures
State income tax	Each state's department of revenue
State unemployment / disability	Each state's Department of Labor / EDD
Overtime / FLSA	US Department of Labor, Wage and Hour Division
Minimum wage	Federal plus state. We use the higher.
Pay frequency / pay stub laws	State-by-state research, summarized on /us/[state]/pay-stub-laws

How calculators work

PayslipIQ calculators are rule-based code, not AI predictions. The flow is:

input → validation → federal calculation → state calculation → FICA → deductions netting → output

Each function is unit-testable against published examples (IRS examples in Publication 15-T, state-published worksheets, FLSA overtime examples).

When values exceed reasonable ranges (e.g., gross pay over $10M annual), we cap and disclose.

How explanations work

The plain-English summary alongside each numeric answer is AI-generated under the constraints in AI Transparency. Numbers themselves are never rewritten by AI.

How state pages are written

Each /us/[state]/ page combines:

State context block: written or reviewed by a researcher familiar with that state's payroll rules.
State tax rates: pulled from the state's department of revenue, dated and sourced.
State-specific paycheck nuances: local taxes (NYC, Philadelphia, etc.), state disability programs (CA SDI, NJ SDI/FLI, NY PFL, RI TDI, HI TDI), pay stub access laws.
FAQ: answering the most common questions for that state's workers.
Disclaimer block: master disclaimer plus state-specific verification reminder.

How content is updated

Change type	Frequency
Federal tax tables	Annual (December for following calendar year)
State tax tables	Annual plus within 30 days of mid-year statutory change
Pay stub law changes	Within 60 days of statutory effective date
FAQ refreshes	Quarterly
AI prompt updates	Reviewed monthly, deployed as needed

Editorial standards

No advice. Education only.
No guaranteed outcomes.
Every claim has a verifiable source.
Every number has a date.
Every page has a disclaimer.
Every AI output has a verification reminder.

How to flag a content issue

Email content@payslipiq.com with the URL and a description. We log all content corrections and post a monthly summary.

Methodology