withholding

Business::Tax::Withholding::JP 日本の消費税と源泉徴収のややこしい計算を自動化します。

The Verification Gate for AI-Generated Tax Decisions. Deterministic tax verification layer powered by Z3 and Decimal math — sits between AI agents and execution systems. Not a calculator, not a filing platform.

A 401(k) is the wrong answer. On $60,000 in California it cuts your tax bill but *lowers* take-home from $47,877.47 to $43,029.47, because you deferred your own pay.

QuickSheet extension: US payroll withholding estimator — federal tax, Social Security, Medicare per pay period (2025 IRS brackets)

The W-4 sets how much is withheld, not how much you owe. Get it wrong and you either lend the government money interest-free or owe a bill with a penalty.

On $60,000 in Texas, $9,610.00 a year is withheld: $5,020.00 federal, $3,720.00 Social Security and $870.00 Medicare.

The deduction covers only the half of time-and-a-half, capped at $12,500 single and $25,000 joint. On $10,000 of overtime pay, roughly $3,333 qualifies, not the whole $10,000.

$2,200 per qualifying child under 17, of which at most $1,700 can come back as a refund if your tax bill is too small to absorb it.

A $10,000 bonus has $2,200.00 withheld federally at the flat 22% supplemental rate, plus $765.00 FICA, leaving about $7,035.00 before state tax.

Article 21 Withholding Tax Calculator

A $5,000 bonus loses $1,100.00 to flat federal withholding and $382.50 to FICA before state tax, arriving at roughly $3,517.50.