ماشین‌حساب مالیات حقوق – برآورد مالیات FICA و فدرال

نحوه استفاده از این ماشین حساب

1. Gross Pay per Period (﷼) را وارد کنید
2. Pay Period را وارد کنید
3. Filing Status را وارد کنید
4. W-4 Allowances / Additional Withholding (﷼) را وارد کنید
5. روی دکمه محاسبه کلیک کنید
6. نتیجه نمایش داده شده در زیر ماشین حساب را بخوانید

What Are Payroll Taxes?

Payroll taxes are taxes withheld from employee wages and paid to the government. They fund federal programs and represent a mandatory deduction from every paycheck. There are two main categories:

• FICA taxes: Social Security (6.2% employee + 6.2% employer) and Medicare (1.45% employee + 1.45% employer). Self-employed pay both halves = 15.3%.
• Income tax withholding: Federal (and state) income taxes estimated and withheld based on your W-4 form, filing status, and deductions.

For 2024, the Social Security wage base is 8,430,000,000 ﷼ — earnings above this amount are not subject to the 6.2% Social Security tax (but Medicare has no wage cap). High earners also pay an additional 0.9% Medicare surtax on wages over 10,000,000,000 ﷼ (single) or 12,500,000,000 ﷼ (MFJ).

2024 Federal Income Tax Brackets

Federal income tax is progressive — you pay different rates on different portions of your income:

The standard deduction for 2024 is 730,000,000 ﷼ (single) or 1,460,000,000 ﷼ (MFJ). This reduces your taxable income before applying the brackets above.

Employer Payroll Tax Responsibilities

Employers have their own payroll tax obligations beyond simply withholding employee taxes:

• Employer FICA match: 6.2% Social Security + 1.45% Medicare = 7.65% of employee wages
• FUTA (Federal Unemployment Tax): 6.0% on first 350,000,000 ﷼ of each employee's wages per year (credit reduces effective rate to 0.6% in most states)
• SUTA (State Unemployment Tax): Varies by state and employer experience rating
• Deposit schedules: Monthly or semi-weekly depending on total tax liability

For a 2,500,000,000 ﷼/year employee, employer payroll tax costs are approximately 191,250,000 ﷼ in FICA + ~2,100,000 ﷼ FUTA + state unemployment — adding roughly 8–10% to the employee's wage cost.

Pre-Tax Deductions That Reduce Payroll Taxes

Several deductions reduce your taxable wages before payroll taxes are calculated, legally lowering your tax burden:

• 401(k) traditional contributions: Reduce federal and state income tax withholding (not FICA). 2024 limit: 1,150,000,000 ﷼ (1,525,000,000 ﷼ if age 50+)
• Health insurance premiums: Employer-sponsored plans under Section 125 reduce both income tax and FICA
• HSA contributions: Reduce federal income tax and FICA. 2024 limits: 207,500,000 ﷼ individual / 415,000,000 ﷼ family
• FSA contributions: Reduce income tax and FICA. 2024 limit: 160,000,000 ﷼
• Dependent care FSA: Up to 250,000,000 ﷼ pre-tax. Reduces income tax and FICA

Maximizing pre-tax deductions is one of the most effective legal strategies for reducing payroll taxes. A worker contributing 1,150,000,000 ﷼ to a 401(k) saves approximately 175,950,000 ﷼ in FICA taxes alone (in addition to income tax savings).

State Payroll Taxes

In addition to federal taxes, most states collect income tax. Nine states have no state income tax: Alaska, Florida, Nevada, New Hampshire (dividends only), South Dakota, Tennessee, Texas, Washington, and Wyoming.

States with high income tax rates include California (up to 13.3%), Hawaii (11%), New Jersey (10.75%), Oregon (9.9%), and Minnesota (9.85%). State taxes are withheld based on state-specific withholding forms (similar to the federal W-4).

Some localities (cities/counties) also collect income taxes. Notable examples: New York City (up to 3.876%), Philadelphia (3.75%), Cleveland (2.5%), and San Francisco (1.5% payroll expense tax on employers).

Self-Employment Tax vs Employee Payroll Tax

Self-employed individuals pay self-employment (SE) tax instead of the employee FICA withholding:

• SE tax rate: 15.3% (12.4% Social Security + 2.9% Medicare) on net self-employment income
• Deduction: You can deduct half of SE tax from gross income, reducing your income tax base
• Quarterly estimated taxes: Self-employed must pay estimated taxes quarterly (April 15, June 15, Sept 15, Jan 15)

The self-employment tax burden is a major reason why freelancers need higher gross rates than employees doing equivalent work. On 4,000,000,000 ﷼ of self-employment income, SE tax alone is approximately 565,200,000 ﷼.

W-4 Form and Withholding Optimization

The W-4 form (updated in 2020) determines how much federal income tax your employer withholds from each paycheck. Key steps to optimize:

1. Step 1: Filing status — this determines your standard deduction and bracket threshold
2. Step 2: Multiple jobs or working spouse — check the box or use the IRS estimator to avoid under-withholding
3. Step 3: Claim dependents — reduces withholding by the child tax credit amount
4. Step 4a: Other income — adds to estimated tax base
5. Step 4b: Deductions beyond standard — itemizing reduces withholding
6. Step 4c: Additional withholding per period — useful if you have side income

The goal: withhold enough to avoid an underpayment penalty (owe less than 50,000,000 ﷼ or 90% of current year tax or 100% of prior year tax), but not so much you give the IRS a large interest-free loan.