Reading A Paycheck
Gross pay is the amount earned before deductions; net pay is the amount sent by check or direct deposit. A pay stub is the bridge between them. It usually lists the pay period, hours, rate, year-to-date totals, and each deduction. Start there. For a worker paid $25 per hour for 80 hours, gross pay begins at $2,000 before overtime, bonuses, or pre-tax benefit choices enter the picture.
Some deductions fund taxes, some buy elected benefits, and some follow a legal order. The label alone may not tell the whole story. “FIT” often means federal income-tax withholding, while “OASDI” is Social Security. State and local labels vary. A biweekly stub has 26 paydays in a typical year, so a $50 deduction each payday totals $1,300. That small line deserves attention.
Employers must generally give employees a wage statement under state rules, yet the required details differ by location. Federal law does not create one universal pay-stub layout. Compare the current stub with the prior one, then compare both with enrollment confirmations and your W-4. Dates matter here.
Why Net Pay Changes
Federal income-tax withholding is an advance payment toward the income tax shown on a tax return. It is not a flat percentage of every paycheck. Payroll uses Form W-4 information, taxable wages, pay frequency, and IRS withholding tables. A new second job, a spouse’s job change, or a large bonus can make the prior W-4 choice fit poorly. Check it yearly.
Social Security and Medicare are separate FICA deductions. For 2026, employee Social Security tax is 6.2% of covered wages up to $184,500, while Medicare tax is 1.45% with no wage ceiling. An employer starts withholding an extra 0.9% Medicare amount after it pays one employee more than $200,000 during the calendar year. That threshold can surprise people.
Pre-tax contributions can reduce the wages used for some taxes, but the treatment varies by benefit. A traditional 401(k) deferral commonly reduces federal income-tax wages, yet it does not generally reduce Social Security or Medicare wages. Health-plan salary reductions may follow different rules. Read the year-to-date boxes, which, frankly, reveal more than a single deposit amount.
After-tax deductions work differently. Roth retirement contributions, union dues, charitable campaigns, and many voluntary purchases usually come out after payroll calculates applicable taxes. A deduction may also end midyear after a goal is met, coverage changes, or an order expires. Payroll systems often apply changes only after a cutoff date. Ask for the effective date.
Check Each Deduction
Confirm Gross Pay
Match regular hours, overtime, shift premiums, commissions, and paid leave against your own time record. Under the federal Fair Labor Standards Act, covered nonexempt workers receive at least 1.5 times their regular rate for overtime after 40 hours in a workweek. State rules can add protections. A missing 2-hour overtime entry affects every deduction calculated from that pay.
Read Tax Labels
Separate federal, state, local, Social Security, and Medicare lines before judging the total. Federal withholding changes with W-4 entries and taxable pay; FICA rates usually do not change during the year except when the Social Security ceiling is reached. Use the IRS Tax Withholding Estimator after a marriage, child, side job, or major income shift. Save its result.
Review Benefit Elections
Compare medical, dental, vision, health savings account, flexible spending account, and disability lines with your enrollment confirmation. Check the employee cost per pay period, coverage tier, and start date. If annual medical payroll cost is $2,600 over 26 checks, the normal deduction is $100 per check. A different figure needs an explanation. Check the plan.
Trace Retirement Deferrals
Find the percentage or dollar election for a 401(k), 403(b), or similar plan and compare it to the current deduction. A 6% election on $2,000 of eligible pay should normally produce $120, subject to plan rules. Employer matching money may appear in a separate year-to-date field rather than net pay. Do not confuse the two.
Check Garnishment Papers
Child support, tax levies, bankruptcy orders, and creditor garnishments have distinct legal rules. Payroll should be able to identify the issuing agency, case reference, and contact route, but it cannot give personal legal advice. Retain the notice and each stub. Deadlines are real.
Compare Pay Periods
Place two stubs side by side and mark every changed line. Look for a new benefit, a revised withholding amount, an arrears recovery, or a one-time correction. One irregular deduction may be valid; repetition tells a different story. The payroll code “RET-ER” may refer to employer money, not an employee deduction.
Use Year-To-Date Totals
Year-to-date figures catch errors that one paycheck hides. Watch the total. Divide the year-to-date deduction by completed pay periods, then compare the average with the expected amount. For example, $1,040 over 13 biweekly checks averages $80. A single $160 deduction may signal a catch-up after unpaid leave. Context changes the reading.
Worked Pay Stub Cases
Consider Maya, paid $1,800 biweekly. Note the rates. Her stub shows $111.60 for Social Security and $26.10 for Medicare, matching 6.2% and 1.45% of gross wages. Her $90 retirement deferral and $75 medical deduction lower the deposit further. The federal withholding line changes after she submits a new W-4 following a dependent change. Nothing on the stub says “error,” but each amount has a traceable source.
In a second example, Daniel sees a $140 “benefit arrears” deduction after returning from 3 weeks of unpaid leave. Check the dates. His coverage continued, so the employer recovers missed employee premiums over later paychecks. He checks the enrollment record and asks payroll for the recovery schedule. It is a bit frustrating, but the schedule turns an unexplained reduction into a limited repayment plan. Keep the notice.
Compare Common Lines
| Deduction | What Sets It | Where To Check | May Change Midyear |
|---|---|---|---|
| Federal tax | W-4 and taxable pay | W-4 and IRS estimator | Yes |
| Social Security | 6.2% to annual limit | Gross and year-to-date pay | Yes |
| Benefits | Election and coverage tier | Enrollment record | Sometimes |
| Garnishment | Legal notice | Order and payroll contact | Yes |
Use this comparison as a starting point, not a substitute for the documents behind a deduction. State tax, local tax, and benefit rules can differ even for coworkers in the same company. A July 2026 stub may also reflect an election made months earlier. Keep the paperwork together.
Avoid Common Errors
Do not assume that a smaller deposit means a higher tax rate. A retirement increase, insurance-tier change, bonus withholding, or arrears collection may be the cause. Check taxable wages before comparing tax dollars. Gross wages are the baseline.
Do not cancel coverage or change a W-4 only because one check looks odd. First identify the code, date, and year-to-date pattern. Write them down. Payroll can correct a data-entry error; a plan administrator can explain coverage; an agency can explain an order. Send copies, not originals.
Another mistake is treating an employer contribution as money removed from pay. Match accounts, pension credits, and employer-paid insurance often appear on statements for context. They can raise total compensation without lowering net pay. The W-2 later separates several wage and tax figures. Check the label.
FAQ
Why Is My Net Pay Lower?
Compare gross pay, tax lines, benefits, and year-to-date totals with the prior stub. A new election, changed hours, or one-time recovery often explains the difference.
Can Payroll Change My Taxes?
Payroll applies withholding rules and your W-4 data. You can submit a revised W-4 when your tax situation changes, subject to employer processing deadlines.
Why Did FICA Stop?
Social Security withholding stops after covered wages reach the annual wage base. Medicare withholding continues because it has no wage ceiling.
What Is A Pre-Tax Deduction?
It is a payroll reduction taken before one or more taxes are calculated. Its exact tax effect depends on the benefit type and plan rules.
Who Explains A Garnishment?
Payroll can identify the order and deduction amount. For the underlying dispute or payment terms, contact the issuing court, agency, or a qualified adviser. Save the notice.
Author's Insight
A paycheck is best read as a record of several separate calculations, not one mysterious subtraction. Federal withholding is adjustable, while statutory payroll taxes follow defined rates and wage limits. Benefit elections deserve the same document trail as tax forms. A 10-minute comparison after each enrollment change can catch mismatched dates before several pay periods pass. Check after changes.
Key Takeaways
Read gross pay first, then sort deductions into taxes, elected benefits, and legally required amounts. Use the current stub, prior stub, enrollment records, W-4, and year-to-date totals to test a questionable line. Ask payroll for a code definition and effective date, then contact the plan or issuing agency when the source sits outside payroll. Keep a dated copy. A written question that names the pay date, deduction code, and disputed dollar figure gets a more useful reply than “my check seems wrong.” Review the next 1 or 2 stubs after any correction. File the confirmation with records for that tax year. It may help later. Store it safely.
Careful review protects your records, but payroll staff cannot resolve every tax or legal question.
