How to Read a Paycheck Stub (and Where Your Money Actually Goes)

Most people glance at the net pay on their paycheck and move on. But your pay stub contains a detailed breakdown of every dollar — federal taxes, state taxes, Social Security, Medicare, health insurance, retirement contributions, and more. Understanding it helps you verify accuracy, optimize your withholdings, and see exactly what you're paying for.

Gross Pay vs Net Pay

Gross pay is your total earnings before any deductions. If you earn $25/hour and work 40 hours, your gross pay for that week is $1,000. Net pay (take-home pay) is what's left after all deductions. The gap between the two is often 25-35% for most workers. Understanding this gap is the first step to financial literacy.

Mandatory Deductions (You Can't Opt Out)

• Federal Income Tax — based on your W-4 form and tax brackets. Rates range from 10% to 37%
• Social Security (FICA) — 6.2% of gross pay, up to $168,600 in 2024. Your employer matches another 6.2%
• Medicare (FICA) — 1.45% of gross pay, no income cap. Additional 0.9% for income over $200,000
• State Income Tax — varies by state. 0% in TX, FL, WA, NV, SD, WY, AK, TN, NH; up to 13.3% in California
• Local Taxes — some cities and counties add their own income tax (NYC, Philadelphia, Detroit, etc.)

Voluntary Deductions (You Chose These)

• 401(k) or 403(b) retirement contributions — pre-tax, reduces taxable income
• Roth 401(k) contributions — after-tax, withdrawals in retirement are tax-free
• Health insurance premiums — often pre-tax through a Section 125 plan
• HSA or FSA contributions — pre-tax dollars for medical expenses
• Dental, vision, life insurance premiums
• Commuter benefits, gym memberships, other employer perks

Year-to-Date (YTD) Totals

Every pay stub shows YTD columns — the cumulative total of earnings and deductions since January 1st. This is critical for tax planning. Divide your YTD federal tax by your YTD gross pay to see your effective tax rate. If it's much higher or lower than expected, you may need to adjust your W-4.

Common Paycheck Errors to Watch For

• Wrong filing status — single vs married can change your withholding by thousands
• Incorrect hours worked — especially for hourly employees with variable schedules
• Missing overtime or shift differential pay
• 401(k) contribution not deducted despite your election
• Health insurance deducted but coverage not active
• Wrong state tax — remote workers sometimes get taxed in the wrong state

How to Adjust Your Withholdings

If you consistently get a large tax refund, you're over-withholding — that's an interest-free loan to the government. If you owe money at tax time, you're under-withholding. Use the IRS Tax Withholding Estimator (irs.gov/withholding) to calculate the right number of allowances, then submit a new W-4 to your employer. Getting this right means more money in each paycheck and fewer surprises at tax time.