Understanding Your Pay Stub: Every Line Item Explained

Anatomy of a Pay Stub

Every pay stub follows a similar structure, whether your employer uses ADP, Gusto, Paychex, or any other payroll provider. Understanding this structure helps you quickly identify errors, track your earnings, and make informed financial decisions. A typical pay stub contains five major sections:

Most pay stubs show two columns for each line item: the current period amount and the year-to-date (YTD) cumulative total. The YTD column is essential for tracking your progress toward annual contribution limits, verifying your tax withholdings are on pace, and catching payroll errors that might only be visible in cumulative totals.

Our Paycheck Calculator replicates the exact flow of deductions from your pay stub, helping you verify that each line item matches what you expect.

Section 1: Gross Earnings

Gross earnings is the starting point of your pay stub and represents the total compensation your employer pays you before any deductions. This section breaks down your pay by type:

Regular Pay

This is your base salary or hourly wages for the pay period. For salaried employees, this is your annual salary divided by the number of pay periods (26 for biweekly, 24 for semi-monthly, 12 for monthly). For hourly workers, it is your hourly rate multiplied by regular hours worked. If you see a discrepancy, verify your pay frequency and check for partial periods (starting or ending employment mid-cycle).

Overtime Pay

Hours worked beyond 40 per week (for non-exempt employees) are typically paid at 1.5 times your regular hourly rate. Some states require overtime for hours beyond 8 per day (California, Alaska, Colorado, Nevada). This line should show overtime hours and the overtime rate separately. Use our Overtime Calculator to verify the amount matches your actual overtime hours.

Bonus & Commission

Bonuses (annual, quarterly, spot bonuses) and commissions are listed as separate line items. Important: bonuses are often subject to supplemental withholding rates. The IRS allows employers to withhold at a flat 22% for federal tax on supplemental wages up to $1 million, or they may use the aggregate method (adding the bonus to your regular pay and withholding at the combined rate). This is why your bonus check may seem heavily taxed, though you will reconcile the correct amount when you file your return.

Other Earnings

This catch-all category may include holiday pay, PTO payouts, shift differentials, tips, reimbursements, or imputed income (the taxable value of employer-paid benefits like group life insurance above $50,000). Not all items here increase your take-home pay; some, like imputed income, only appear so taxes can be calculated on the benefit value.

Convert between hourly and salary pay to understand how your regular pay should appear on each paycheck using our Hourly to Salary Converter.

Section 2: Pre-Tax Deductions

Pre-tax deductions are subtracted from your gross pay before taxes are calculated. This means they reduce your taxable income, effectively giving you a discount on these expenses equal to your marginal tax rate. A $500 pre-tax deduction for someone in the 22% federal bracket saves $110 in federal taxes alone.

401(k) / 403(b) Contributions

Traditional 401(k) contributions are deducted pre-tax, reducing your taxable income dollar for dollar. The 2026 employee contribution limit is $23,500 ($31,000 if you are 50 or older with the catch-up provision). Your pay stub should show both your contribution and any employer match, though the employer match does not reduce your paycheck. Monitor the YTD column to ensure you do not exceed annual limits, which would trigger excess contribution penalties.

Health Insurance Premiums

Most employer-sponsored health insurance premiums are deducted pre-tax under a Section 125 cafeteria plan. You will typically see separate line items for medical, dental, and vision premiums. The employee share of premiums varies widely by employer and plan type: individual coverage averages $1,200-$2,400 per year, while family coverage averages $5,000-$8,000 per year for the employee portion.

HSA Contributions

Health Savings Account contributions through payroll are deducted pre-tax and avoid both income tax and FICA tax (a unique triple tax advantage). The 2026 contribution limits are $4,300 for individual coverage and $8,550 for family coverage. HSA funds roll over indefinitely and can be invested for long-term growth, making them one of the most tax-efficient savings vehicles available.

FSA Contributions

Flexible Spending Account contributions for healthcare or dependent care are also pre-tax. Healthcare FSAs have a $3,300 limit in 2026, while dependent care FSAs have a $5,000 limit. Unlike HSAs, FSA funds generally follow a use-it-or-lose-it rule (though some plans allow a $640 rollover or 2.5-month grace period).

Our Salary Calculator helps you understand how pre-tax deductions reduce your taxable income and increase your effective take-home pay relative to your tax bracket.

Section 3: Tax Withholdings

Tax withholdings are the mandatory deductions that fund government programs and services. These are calculated on your taxable income (gross pay minus pre-tax deductions) and cannot be avoided. Here is what each line item means:

Federal Income Tax (FIT or FED)

This is typically your largest tax withholding. The amount is determined by your W-4 form settings (filing status, dependents, additional withholding). Federal tax uses progressive brackets: 10%, 12%, 22%, 24%, 32%, 35%, and 37%. Your employer calculates withholding per pay period using IRS Publication 15-T tables. If you consistently get large refunds (over $1,000), reduce your withholding by updating your W-4. If you owe at tax time, increase withholding.

State Income Tax (SIT or STATE)

State income tax withholding varies dramatically. If you live in one of the nine no-income-tax states (Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, Wyoming), this line will not appear. Flat-tax states like Illinois (4.95%) or Pennsylvania (3.07%) withhold a fixed percentage. Progressive states like California or New York calculate withholding based on income brackets similar to federal. Use our State Tax Calculator to verify your state withholding is correct.

Social Security (OASDI or SS)

Social Security tax is withheld at a flat 6.2% on wages up to $168,600 in 2026. Your employer pays a matching 6.2%. The maximum employee Social Security tax is $10,453.20. Once your YTD earnings exceed the wage base, this deduction drops to $0 for the rest of the year. If you work multiple jobs, you may overpay and can claim the excess on your tax return.

Medicare (MED or MEDI)

Medicare tax is withheld at 1.45% on all wages with no cap. Your employer matches this amount. If your wages exceed $200,000 (regardless of filing status for withholding purposes), an additional 0.9% Medicare surtax applies to wages above the threshold. Unlike Social Security, Medicare never stops being withheld.

Local Taxes

Workers in certain cities and counties may see additional local income tax withholdings. New York City (up to 3.876%), Philadelphia (3.75%), and many Ohio cities (1.5-3%) are the most common. These are separate from state taxes and fund local government services.

Our Net Pay Calculator computes all tax withholdings in one place, showing you the exact federal, state, Social Security, and Medicare deductions for your salary.

Section 4: Post-Tax Deductions

Post-tax deductions are taken from your pay after taxes have been calculated. These do not reduce your taxable income, so you pay full tax on the money before it is deducted. Common post-tax deductions include:

Roth 401(k) Contributions

Unlike traditional 401(k) contributions, Roth contributions are made with after-tax dollars. You pay taxes now but enjoy tax-free withdrawals in retirement (including all growth). The same $23,500 annual limit applies to your combined traditional and Roth 401(k) contributions. Roth is generally better for younger workers who expect to be in a higher tax bracket later, while traditional is better for workers near peak earning years.

Group Life Insurance

Employer-provided group life insurance coverage above $50,000 generates imputed income (the taxable value appears in your gross earnings). You may also purchase supplemental life insurance through your employer, which is deducted post-tax. The premium for supplemental coverage depends on your age and coverage amount.

Disability Insurance

If you pay for long-term disability insurance with after-tax dollars, any disability benefits you receive will be tax-free. If your employer pays the premium (pre-tax), benefits will be taxable. Some employees choose to pay post-tax specifically to ensure tax-free benefits if they ever become disabled.

Wage Garnishments

Court-ordered deductions for child support, alimony, student loan defaults, or tax liens appear as post-tax deductions. Federal law limits the garnishment amount: up to 25% of disposable earnings for most debts, up to 50-65% for child support. These are not voluntary and cannot be removed without a court order or resolution of the underlying debt.

Union Dues

Union members typically see monthly or per-pay-period dues deducted post-tax. Dues range from 1-2.5% of gross pay depending on the union. Under the Tax Cuts and Jobs Act (TCJA), union dues are no longer deductible on federal tax returns for tax years 2018-2025, though some states still allow the deduction.

Sample Pay Stub Walkthrough

Let us walk through a complete pay stub for a salaried employee earning $72,000 per year, paid biweekly, living in Illinois (4.95% flat tax), contributing 6% to a traditional 401(k), with individual health insurance:

In this example, $958.60 is deducted from each biweekly paycheck, or 34.6% of gross pay. The breakdown: pre-tax deductions save taxes by reducing income from $2,769.23 to $2,433.85 before withholding calculations. Federal tax at approximately 12-22% marginal rate, Illinois flat 4.95%, and FICA at 7.65% consume the bulk of the deductions.

The annual net pay of approximately $47,076 means this worker takes home 65.4% of their $72,000 gross salary. Verify your own deductions match expected percentages using our Salary Calculator.

Common Pay Stub Errors to Watch For

Payroll errors are more common than most people realize. The American Payroll Association estimates that 1-8% of payroll runs contain some form of error. Here are the most common mistakes and how to spot them:

• Incorrect hours: For hourly workers, verify that regular and overtime hours match your records. Keep your own time log to cross-reference. Even a half-hour error per period adds up to $500+ per year for a $40/hr worker.
• Wrong tax filing status: If your W-4 filing status does not match your actual situation (single vs. married, dependents), you will be over- or under-withheld all year. Check the federal withholding amount against IRS tables for your income and status.
• Missed overtime: Some employers incorrectly classify overtime-eligible workers as exempt. If you are non-exempt and work over 40 hours, overtime must be paid at 1.5x. The 2026 salary threshold for overtime exemption is $58,656.
• Double deductions: Benefits deductions occasionally get applied twice, especially after open enrollment changes. Compare your deduction amounts to your benefits enrollment confirmation.
• Missing employer 401(k) match: If your employer matches contributions, the match should appear on your stub (though it does not reduce your pay). Verify the match percentage and that it is being deposited into your retirement account.
• Social Security over-withholding: If you exceed the $168,600 wage base and Social Security is still being withheld, flag it with payroll immediately. This is more common when you switch employers mid-year, as the new employer restarts the count.

Review every pay stub when you start a new job, after open enrollment changes, and at least quarterly throughout the year. Any discrepancy should be reported to your payroll department immediately. Compare your expected take-home with our Raise Calculator to make sure changes like raises are reflected correctly.

Optimizing Your Pay Stub Deductions

While mandatory tax withholdings are non-negotiable, several strategies can optimize your voluntary deductions to maximize both current take-home pay and long-term wealth:

• Right-size your W-4: If you consistently receive tax refunds over $1,000, you are withholding too much. Adjust your W-4 to claim the correct allowances and increase each paycheck by $40-$80. That money is better in your pocket earning interest than sitting with the IRS interest-free.
• Maximize employer 401(k) match: If your employer matches 50% of contributions up to 6% of salary, contribute at least 6% to capture the full match. On a $72,000 salary, that is $2,160 in free money annually. Not contributing to the match level is leaving guaranteed 50% returns on the table.
• Use HSA as a stealth retirement account: If you have an HSA-eligible health plan, max out HSA contributions ($4,300 individual). HSA contributions avoid income tax and FICA tax, growth is tax-free, and withdrawals for medical expenses are tax-free. After age 65, you can withdraw for any purpose (taxed like a traditional IRA).
• Evaluate Roth vs. Traditional: If you are in a low tax bracket now but expect higher income later, Roth 401(k) contributions (post-tax) will save you money long-term despite reducing current take-home pay more than traditional contributions.
• Review health insurance during open enrollment: Compare your actual medical usage against your plan. A high-deductible plan with HSA may result in lower per-paycheck premiums and better long-term savings than a high-premium PPO if you are generally healthy.

Model how different deduction strategies affect your paycheck with our Retirement Calculator for long-term planning, and our Salary Inflation Calculator to understand how your purchasing power changes over time.

Frequently Asked Questions