2026 Year-End Paycheck Checkup: What to Review Before Your Last Paycheck

Find your most recent pay stub and identify its pay date, pay period and year-to-date columns. The pay period tells you which work the check covers; the payment date identifies when the employer paid it. A period spanning December and January can be confusing, so ask payroll how the payment is reported instead of assigning it to a tax year solely from the dates worked.

Write down the year-to-date gross wages, federal income-tax withholding, Social Security wages and withholding, Medicare wages and withholding, and the major benefit deductions. Your employer may use abbreviations such as FIT, FITW or federal withholding. These labels are not standardized across every payroll system. The IRS withholding estimator instructions describe common labels.

Keep your most recent stub from each employer if you changed jobs or worked more than one job. Each employer's year-to-date column normally reflects that employer's payroll records, not an automatic household-wide total. For joint filing, gather the relevant information for both spouses. Do not send pay stubs or Social Security numbers through an insecure channel when asking a question.

This checklist is for employees reviewing 2026 wages. It does not calculate your complete federal return, determine eligibility for every credit or replace the official tax forms. It helps you identify the next question to ask while there may still be time to act.

Look at regular wages, overtime, commissions, bonuses, paid leave and any adjustments. Compare the pay period with your time records or salary agreement. A retroactive raise, a missed shift or a bonus can make a check different from the one before it. If an earnings line is unexpected, ask payroll which dates, hours and rates it covers.

Suppose an employee is paid $3,000 gross every two weeks and has received 20 regular checks. Ignoring all bonuses and adjustments, those checks total $60,000 in gross wages. If the stub instead shows $62,000 year to date, look for a $2,000 bonus or another earnings item before assuming the running total is wrong. If only 19 checks have been paid, the same multiplication would be premature.

The example is deliberately simple. It does not determine the tax year of a delayed payment or the tax treatment of a reimbursement. An employer may correct prior payroll, issue a separate bonus check or report noncash compensation. The Department of Labor's payroll-record guidance identifies the records employers must maintain under federal wage law.

For budgeting, distinguish biweekly from semimonthly pay. Biweekly pay is every two weeks; semimonthly pay is twice per month. The number of actual pay dates in a calendar year depends on the employer's schedule. Review the pay calendar rather than assuming that a monthly deposit is simply twice a biweekly check.

Federal income-tax withholding is a payment toward your eventual federal tax liability. It is not the same as Social Security, Medicare or state withholding. Locate the federal income-tax year-to-date amount on your stub and keep it separate from those other lines.

A basic projection adds withholding already taken to an estimate for the remaining checks. For example, if $6,000 has been withheld so far and four regular checks remain with an expected $400 withheld on each, the projection is $6,000 plus $1,600, or $7,600. If a bonus or salary change is expected, include a realistic estimate for it instead of assuming every remaining check will be identical.

That $7,600 projection is not a calculation of what the employee owes. Annual tax depends on total income, filing status, deductions, credits and other circumstances. Estimated tax payments and refundable credits may also affect the return. The IRS Tax Withholding Estimator FAQs explain how the estimator combines year-to-date and expected withholding with other inputs.

Use the IRS Tax Withholding Estimator with your current pay stubs and information about other jobs or income. The tool can suggest information for a new Form W-4. Review its assumptions and instructions; an incorrect income estimate can produce an incorrect result. If you submit a new form, ask when payroll will apply it and verify the first affected check.

Near year end there may be only a few checks left. A change spread over fewer checks can have a larger per-check effect, so do not copy an annual shortfall into a W-4 field without following the IRS instructions. Depending on the circumstances, the IRS also discusses estimated payments. The right approach depends on the taxpayer's facts and timing.

Social Security and Medicare are payroll taxes, not federal income-tax withholding. For 2026, the employee Social Security rate is generally 6.2% on covered wages up to $184,500. The regular employee Medicare rate is generally 1.45% on covered wages without that wage ceiling. The IRS Social Security and Medicare guidance explains the rates.

If one employer's covered wages reach the annual Social Security wage base, the Social Security deduction generally stops for the rest of that year. Medicare continues. In January, the annual Social Security wage base starts over, so a worker who reached the prior year's cap may see a lower deposit even if gross wages are unchanged. The SSA 2027 fact sheet lists the next year's $192,300 Social Security wage base.

Compare each deduction with the relevant taxable wages rather than simply multiplying gross pay. A traditional employee 401(k) deferral generally reduces federal income-tax wages but remains subject to Social Security and Medicare. Some other eligible benefits have different treatment. See the IRS retirement-plan FAQ.

If you changed jobs, two employers may each withhold based on wages they paid. Combined Social Security withholding can exceed the employee maximum. The IRS distinguishes excess withholding from multiple employers from an error by a single employer; the correction procedures differ. Review IRS Topic 608 and retain both W-2s.

Additional Medicare Tax is another separate item. An employer generally starts withholding the extra 0.9% when Medicare wages it pays an employee exceed $200,000 in the year. Return liability can depend on filing status and combined relevant income. The IRS explanation addresses this difference.

Compare retirement contributions, health premiums, HSA contributions and flexible spending account elections with your benefit confirmations. A change can reduce a paycheck deposit without being a tax increase. A traditional 401(k) contribution, for example, directs money to retirement savings while generally reducing federal income-tax wages; it does not ordinarily remove that amount from Social Security and Medicare wages.

The general 2026 employee 401(k) deferral limit is $24,500. Catch-up contributions can be available to eligible workers if their plan permits, with a higher catch-up for certain ages. Employer plan limits and circumstances can restrict the amount. Use the IRS 401(k) contribution limits rather than assuming everyone can contribute the same maximum.

For HSAs, the 2026 general limit is $4,400 for self-only coverage and $8,750 for family coverage, subject to eligibility and other adjustments. Eligible individuals age 55 or older may qualify for an additional catch-up. Contributions made through an eligible cafeteria plan can be treated differently for payroll tax from an employee contribution made outside payroll. See IRS Revenue Procedure 2025-19 and the W-2 instructions.

Do not assume every FSA balance or employer benefit has the same deadline. Health FSA carryover or grace-period rules depend on the plan; HSA balances generally remain available subject to the account rules. Read your actual plan documents and ask the plan administrator about contribution limits, eligible expenses and reimbursement deadlines.

If an election is wrong, ask payroll or the benefits administrator which correction is available and when it takes effect. Some elections have plan-year restrictions. Avoid making a last-minute change solely because a generic article promises a fixed tax saving: actual savings depend on tax treatment, brackets and the plan.

Review state income-tax withholding and any local, disability or paid-leave deductions shown on the stub. Their names, rates and eligibility rules vary. A state with no individual income tax on wages can still have another payroll program. A calculator that models state income tax may not include every city, county or state program.

If you moved, began remote work in another state or work across a state line, verify the residence and work locations on file with payroll. Some states have reciprocity agreements and special forms, but a rule in one state cannot be assumed to apply in another. Check the relevant state tax agencies and ask payroll which certificates it has received.

Keep records of a midyear move and pay dates in each relevant jurisdiction. The final return may require a different allocation from a simple full-year estimate. If the figures are material or the facts are complicated, a state tax professional can help apply the relevant rules.

After year end, compare your employer's Form W-2 with your payroll records. Box 1 reports wages for federal income-tax purposes, Box 2 reports federal income-tax withheld, Box 3 reports Social Security wages, Box 4 reports Social Security tax withheld, Box 5 reports Medicare wages and tips, and Box 6 reports Medicare tax withheld. Social Security tips and certain other amounts have separate reporting rules.

The boxes can legitimately differ. A traditional 401(k) deferral generally is excluded from Box 1 while remaining in Social Security and Medicare wages. Certain employer benefits may change the wage bases as well. Box 3 is subject to the Social Security wage base, while Box 5 is not subject to the same cap. The 2026 W-2 instructions explain the reporting.

For example, suppose annual gross wages are $78,000, traditional 401(k) deferrals are $3,900 and an eligible health-plan deduction reduces the relevant wage bases by $2,600. With no other adjustments, federal income-tax wages would be $71,500 and Social Security and Medicare wages would be $75,400. This simplified example does not account for every W-2 box or plan rule; it shows why the numbers do not automatically match.

If your final pay stub and W-2 differ, ask payroll what adjustment or reporting rule explains the difference. A correction may be appropriate, but do not modify a return figure based only on a rough comparison. Save the explanation and any corrected W-2 with your records.

1. Confirm the pay date, pay period and remaining 2026 pay schedule.
2. Compare year-to-date gross wages with regular pay, bonuses and adjustments.
3. Record federal income-tax withholding separately from Social Security, Medicare and state taxes.
4. Use the IRS estimator with current pay stubs and relevant information from other jobs or income.
5. Check retirement and health-benefit elections against the plan's records and deadlines.
6. Review Social Security wages and the annual cap, especially after changing jobs.
7. Confirm state and local deductions and the work location on file.
8. Ask payroll a specific question about any unexplained line and keep the response.
9. Compare your final stub with the W-2 when it becomes available.

Take action early enough for payroll to process a valid change. A W-4 adjustment affects federal income-tax withholding; it does not change the Social Security rate or by itself reduce the final federal tax. If the estimator indicates a possible shortfall, read the IRS instructions and consider the available payment options for your situation.

Will the last pay stub equal my W-2?

Not necessarily line for line. W-2 boxes report specific taxable wages and withholding. Benefits, payroll corrections, taxable fringe benefits and wage-base limits can create differences. Ask payroll to reconcile a material discrepancy using the official reporting rules.

Does a larger refund mean my taxes were lower?

Not by itself. A refund is affected by payments, withholding, refundable credits and the tax calculated on the return. A worker can have a refund because more tax was prepaid during the year even when the final tax liability remains significant.

Can I change a W-4 near the end of the year?

You can submit a valid updated Form W-4 to your employer. Ask when it will take effect and use the form and IRS estimator instructions. A change with only a few remaining checks can have a different per-check effect from a change made early in the year.

Why did Social Security stop but Medicare continue?

The Social Security portion has an annual wage base; regular Medicare does not have the same cap. Confirm your year-to-date covered wages and ask payroll if the timing or amount appears inconsistent.

Is a paycheck calculator enough to check my withholding?

A calculator can help explore a wage scenario. This site's model does not reproduce all W-4 choices, local taxes, employer benefits or year-to-date payroll effects. The IRS estimator and your actual pay stubs are more appropriate for checking federal withholding for your own situation.

What should I do if I had two employers?

Keep each employer's final stub and W-2. Add relevant wages and federal withholding when estimating the full year's return, and review the IRS rules for excess Social Security withholding if combined withholding exceeds the annual employee maximum. The correction for multiple employers differs from a single-employer overcollection.

Use the IRS paycheck checkup, withholding estimator, 2026 W-2 instructions, and Social Security and Medicare rates for current official guidance. The examples above are illustrative and omit information needed to prepare an individual tax return.