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📅 Pay Breakdown by Period
How Payroll Is Calculated
Payroll calculation involves determining an employee's gross pay then systematically deducting all required taxes and voluntary contributions to arrive at net take-home pay. Understanding this process helps both employers run accurate payroll and employees verify their pay stubs are correct.
Understanding FICA Taxes
FICA taxes fund Social Security and Medicare programs. Employees pay 6.2 percent of gross wages toward Social Security up to an annual wage base limit and 1.45 percent toward Medicare with no limit. Employers match both amounts exactly. High earners pay an additional 0.9 percent Medicare surtax on wages above $200,000 for single filers.
Pre-Tax vs Post-Tax Deductions
Pre-tax deductions like 401k contributions and health insurance premiums reduce your taxable income before taxes are calculated — saving you money on federal, state and FICA taxes. Post-tax deductions like Roth 401k contributions and life insurance are taken after taxes are calculated. Maximizing pre-tax deductions is one of the most effective ways to legally reduce your tax burden.
How Payroll Works — Complete Guide for Employers and Employees
Payroll is the process of calculating employee compensation and deducting the correct taxes and benefits before paying take-home wages. Understanding payroll helps employees verify their paychecks are accurate and helps employers budget staffing costs correctly. The core formula is simple: Net Pay = Gross Pay − Federal Tax − State Tax − Social Security − Medicare − Other Deductions. Every deduction has specific rules, rates and limits that change annually.
Gross Pay Calculation — Salary vs Hourly
Gross pay is total earnings before any deductions. For salaried employees, gross pay per period is the annual salary divided by the number of pay periods (26 for bi-weekly, 24 for semi-monthly, 12 for monthly). For hourly employees, gross pay equals hours worked multiplied by the hourly rate, plus 1.5x for overtime hours beyond 40 per week. Bonuses, commissions and paid time off all add to gross pay before taxes are calculated.
| Pay Frequency | Periods/Year | $50k Gross/Period | $75k Gross/Period | $100k Gross/Period |
|---|---|---|---|---|
| Weekly | 52 | $961.54 | $1,442.31 | $1,923.08 |
| Bi-Weekly | 26 | $1,923.08 | $2,884.62 | $3,846.15 |
| Semi-Monthly | 24 | $2,083.33 | $3,125.00 | $4,166.67 |
| Monthly | 12 | $4,166.67 | $6,250.00 | $8,333.33 |
Federal Income Tax Withholding — How It Works
Federal income tax is withheld from each paycheck based on the employee's W-4 form elections. The IRS provides tax tables that employers use to determine withholding amounts based on gross pay, filing status and pay frequency. For 2025, federal tax brackets range from 10% on income under $11,925 up to 37% on income above $626,350. Withholding is designed so that the total withheld across all paychecks approximately equals the actual annual tax liability. Employees who want more or less withheld can adjust their W-4 at any time. See our tax calculator for a related calculation.
FICA Taxes — Social Security and Medicare Breakdown
FICA (Federal Insurance Contributions Act) taxes fund Social Security and Medicare. Both employee and employer each pay 6.2% for Social Security on wages up to $176,100 for 2025, and 1.45% for Medicare with no wage limit. High earners above $200,000 pay an additional 0.9% Additional Medicare Tax. Employers match the employee FICA contribution, making the total employer cost 7.65% of gross wages on top of salary. Use our salary calculator to see your complete annual compensation breakdown including all FICA contributions.
| Annual Salary | Social Security | Medicare | Total FICA (Employee) |
|---|---|---|---|
| $35,000 | $2,170 | $508 | $2,678 |
| $50,000 | $3,100 | $725 | $3,825 |
| $75,000 | $4,650 | $1,088 | $5,738 |
| $100,000 | $6,200 | $1,450 | $7,650 |
State Income Tax — Varies Significantly by State
State income tax withholding varies dramatically by location. Nine states have no state income tax at all — Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington and Wyoming. California has the highest top rate at 13.3%. Most states with income tax use progressive brackets similar to the federal system. When calculating total take-home pay, state tax can reduce net pay by an additional 3-10% depending on your state and income level. Our payroll calculator uses the state rate you enter to estimate withholding.
Pre-Tax Deductions That Reduce Your Tax Bill
Several common workplace benefits are deducted from gross pay before taxes are calculated, reducing your taxable income and overall tax burden. Health insurance premiums paid through an employer plan, 401(k) contributions up to $23,500 for 2025, Health Savings Account (HSA) contributions and Flexible Spending Account (FSA) contributions are all pre-tax deductions. A $500 monthly 401(k) contribution reduces your federal taxable income by $6,000 annually — saving approximately $900-$2,220 in federal taxes depending on your bracket. Use our budget calculator to plan how pre-tax deductions affect your monthly take-home budget.
True Cost of an Employee — What Employers Actually Pay
The total cost of employing someone significantly exceeds their stated salary. Beyond gross wages, employers pay the 7.65% employer FICA match, Federal Unemployment Tax (FUTA — 6% on first $7,000 of wages, effectively $420/employee), State Unemployment Insurance (SUTA — varies 0.5% to 10% by state), workers compensation insurance, and the employer share of health insurance premiums which averaged $7,470 per employee in 2024. A $60,000 salary employee typically costs an employer $75,000 to $85,000 per year in total compensation costs.
Payroll for Small Business — Key Compliance Points
Small business owners must deposit payroll taxes to the IRS on a schedule based on their tax liability — either monthly or semi-weekly. Failing to deposit payroll taxes on time results in penalties starting at 2% for deposits 1-5 days late and rising to 15% for deposits more than 10 days late after an IRS notice. Employers must also file quarterly Form 941 reporting wages paid and taxes withheld, and annual Form W-2 for each employee by January 31. Most small businesses use payroll software or a payroll service to manage these requirements and avoid costly penalties.
Reading Your Pay Stub — Every Line Explained
Every pay stub contains several standard sections. The earnings section shows regular pay, overtime, bonuses and paid time off. The deductions section lists federal and state tax withheld, Social Security, Medicare, health insurance premiums, retirement contributions and any garnishments. The year-to-date (YTD) column shows cumulative totals for the year — useful for tracking when you will hit the Social Security wage base limit. Your employer identification number (EIN) and your Social Security number last four digits also appear for tax filing purposes. Understanding every line ensures you catch errors early and plan your finances accurately around your actual take-home pay rather than your stated salary figure.
Payroll Errors and How to Avoid Them
Payroll errors are costly for both employers and employees. Common mistakes include using the wrong pay period for annualising income when calculating withholding, failing to update tax tables at the start of each year, miscalculating overtime for employees who work across multiple pay periods, and forgetting to deduct garnishments before issuing payment. Employees should review every pay stub carefully — checking gross pay, each deduction line and net pay. If the numbers do not match expectations contact your payroll or HR department immediately. Keeping records of all pay stubs ensures you can verify your W-2 at tax time and catch discrepancies before filing your return.
Frequently Asked Questions
How to Calculate Payroll — Complete Guide
Payroll calculation involves determining the correct gross pay for each employee and then deducting the right amounts for taxes and benefits to arrive at net take-home pay. Understanding payroll is essential for both employers managing staff costs and employees verifying their pay is correct. The basic formula is: Net Pay = Gross Pay − Federal Tax − State Tax − FICA (Social Security + Medicare) − Other Deductions.
Gross Pay vs Net Pay — Key Difference
Gross pay is the total amount earned before any deductions — your salary or hourly rate multiplied by hours worked plus overtime and bonuses. Net pay (take-home pay) is what actually arrives in your bank account after all mandatory and voluntary deductions. For most employees, net pay is 65-80% of gross pay depending on tax bracket, state, and benefit elections. Use our salary calculator to see your complete pay breakdown including all deductions.
FICA Taxes — Social Security and Medicare
FICA taxes are mandatory federal payroll taxes split equally between employer and employee. For 2024-2025, employees pay 6.2% for Social Security (up to the wage base of $168,600) and 1.45% for Medicare with no cap. Employers match both amounts, meaning the total FICA cost to an employer is 15.3% of gross wages. High earners above $200,000 ($250,000 married) pay an additional 0.9% Additional Medicare Tax that employers do not match.
| Tax Type | Employee Rate | Employer Rate | Wage Limit |
|---|---|---|---|
| Social Security | 6.2% | 6.2% | $168,600 |
| Medicare | 1.45% | 1.45% | No limit |
| Additional Medicare | 0.9% | 0% | $200k+ |
| FICA Total | 7.65% | 7.65% | Combined 15.3% |
Federal Income Tax Withholding
Federal income tax is withheld from each paycheck based on the employee's W-4 elections and filing status. The amount withheld uses IRS tax tables and depends on gross pay, pay frequency, filing status (single/married/head of household) and any additional withholding requested. Unlike FICA which is a flat percentage, federal income tax is progressive — meaning higher income is taxed at higher rates. For 2025, federal tax brackets range from 10% to 37%.
Payroll Cost to Employer — The True Cost of an Employee
The cost of employing someone is significantly higher than their salary alone. Beyond gross wages, employers pay the employer share of FICA (7.65%), Federal Unemployment Tax (FUTA — up to 6% on first $7,000), State Unemployment Tax (SUTA — varies by state), plus costs for health insurance, retirement contributions, workers compensation and paid time off. A $50,000 salary employee typically costs an employer $60,000-$70,000 per year in total compensation costs. Use our hourly to annual calculator to convert between hourly rates and annual salary equivalents for accurate cost comparisons.
| Salary | FICA (7.65%) | Benefits Est. | Total Cost |
|---|---|---|---|
| $35,000 | $2,678 | $7,000 | ~$45,000 |
| $50,000 | $3,825 | $10,000 | ~$64,000 |
| $75,000 | $5,738 | $15,000 | ~$96,000 |
| $100,000 | $7,650 | $20,000 | ~$128,000 |
Overtime Pay Calculation
Under the Fair Labor Standards Act (FLSA), non-exempt employees must receive overtime pay of at least 1.5 times their regular hourly rate for hours worked beyond 40 in a workweek. Some states have daily overtime rules — California requires overtime after 8 hours in a day regardless of the weekly total. For salaried employees, overtime eligibility depends on whether their salary exceeds the FLSA threshold (currently $684/week or $35,568/year). Employees earning below this threshold are automatically eligible for overtime regardless of job duties.
Pay Frequency — How It Affects Your Paycheck
Pay frequency affects the size of each paycheck and how withholding is calculated. Weekly pay (52 paychecks/year) produces smaller individual checks. Bi-weekly (26 paychecks) is most common in the US. Semi-monthly (24 paychecks) means two pay dates per month on fixed dates. Monthly (12 paychecks) produces larger individual amounts. Tax withholding is calculated based on annualized income so more frequent pay does not change total annual tax — only the timing of withholding. However bi-weekly pay results in 2 "extra" paychecks per year compared to semi-monthly which can feel like a bonus month for budgeting. Use our budget calculator to plan your spending around your pay cycle.
W-2 vs 1099 — Employee vs Contractor Payroll
W-2 employees have taxes withheld by employers who also pay half of FICA taxes. 1099 independent contractors receive full gross pay but are responsible for paying self-employment tax (15.3% — both employee and employer share of FICA) plus income tax through quarterly estimated payments. While contractor gross pay is often higher, the self-employment tax burden and lack of benefits typically make W-2 employment financially equivalent or better for most workers earning under $100,000 annually.