Employee Taxes: A Beginner’s Guide

Employees commonly have federal income tax, Social Security, Medicare, and state or local income taxes withheld from gross pay. The employer generally owes matching Social Security and Medicare taxes plus FUTA, state unemployment, and jurisdiction-specific employer taxes. Federal withholding is calculated from taxable wages, Form W-4, payroll period, and Publication 15-T. For 2026, employee and employer Social Security are each 6.2 percent up to the $184,500 wage base, and regular Medicare is 1.45 percent for each side without a wage cap. Employee tax withholding reduces net pay; employer taxes are additional business costs.

This guide is part of Steady’s Payroll, W-2 & 1099 library. It explains the federal workflow in practical terms, but the correct result still depends on the payment year, entity, worker relationship, filing method, and state rules.

The answer in context

Federal income tax is not FICA

Withholding uses Form W-4 and tax tables, while Social Security and Medicare use statutory wage definitions and rates.

Employer taxes do not reduce net pay

Employer FICA and unemployment taxes are recorded as payroll expenses and liabilities.

Taxable wages vary

Pretax benefits and taxable fringe benefits can produce different federal income-tax, Social Security, Medicare, FUTA, and state wage bases.

Additional Medicare has two thresholds

Payroll begins 0.9 percent withholding after one employer pays more than $200,000, while the employee’s final liability uses filing status on the return.

States and work locations matter

Residence, work state, reciprocity, local tax, unemployment localization, and remote work can change registration and withholding.

Deposits and returns have separate calendars

Employers deposit liabilities according to deposit rules and file employment returns according to their own due dates.

New deductions do not automatically change payroll taxability

Individual deductions for qualified tips or overtime do not make all those wages exempt from Social Security and Medicare.

Step-by-step workflow

1. Register every jurisdiction. Obtain federal, state, unemployment, and local accounts before the first applicable payroll.
2. Collect employee forms. Use Form W-4, state forms, work and residence addresses, I-9, benefits, and authorized deductions.
3. Map earning codes. Document tax treatment for regular pay, overtime, bonus, commission, tips, leave, reimbursements, and fringe benefits.
4. Calculate taxable wages. Apply each tax’s rules and wage base rather than using one taxable amount for every field.
5. Calculate employee taxes. Use Publication 15-T and current Social Security, Medicare, state, and local rules.
6. Calculate employer taxes. Record matching FICA, FUTA, state unemployment, and other employer liabilities separately.
7. Review and approve. Compare headcount, rates, hours, gross pay, taxable wages, taxes, deductions, net pay, and changes.
8. Deposit and file. Pay each agency on schedule, file returns and wage statements, and retain acceptance.
9. Reconcile. Tie payroll registers to banks, liabilities, deposits, Forms 941 and 940, W-2 and W-3, states, and the general ledger.

Worked example

An employee earns $4,000 in a 2026 pay period. Payroll determines federal income-tax wages after the employee’s applicable pretax elections, calculates withholding from the current Form W-4 and Publication 15-T, and calculates Social Security and Medicare from their respective wage bases. The employee’s taxes reduce net pay. The employer records matching FICA and unemployment taxes as additional expense. Each amount is deposited, reported, and reconciled separately.

The example is intentionally a workflow illustration, not a conclusion for every taxpayer. A strong file connects each number on the return to a source report and records why an exception, exclusion, or classification was applied.

Records to keep

Keep the source form or worksheet, contracts or engagement records, payer and recipient identity support, the detailed payment or payroll ledger, bank and processor reconciliation, calculations, correspondence about corrections, filed copies, recipient-delivery evidence, and federal and state acceptance confirmations. Store the records by tax year and keep superseded versions when they explain a correction.

A reviewer should be able to begin with the final reported amount and trace it back to transactions without rebuilding the year. Add a short review memo for judgments such as worker status, corporate exemption, payment-method exclusion, state filing, or unusual timing. That memo is often more useful than another unlabeled spreadsheet.

Common mistakes

• Calling all payroll taxes employee taxes. Distinguish employee withholdings from employer-paid costs.
• Using one wage base. Federal income tax, FICA, FUTA, benefits, and states can differ.
• Deducting employer taxes from employees. Employer shares are not automatic employee deductions.
• Ignoring remote-work states. Withholding and unemployment can follow work location and specific state rules.
• Changing Form W-4 for the employee. The employee provides elections; the employer applies the form and required defaults.
• Paying liabilities with the return. Federal tax deposits generally follow electronic deposit rules and may be due before Form 941.
• Stopping at the payroll provider. Verify agency accounts, filings, notices, acceptance, and accounting.

Final review before filing

Confirm the form and revision year, taxpayer identities, dollar fields, payment categories, withholding, filing channel, recipient statement, state obligations, due dates, and approval. Compare the final output with the source reconciliation rather than reviewing the form in isolation. If software recalculates an amount after an edit, rerun the tie-out.

Keep preparation, filing, and acceptance as three separate statuses. A draft can be complete but unfiled; a transmission can be sent but rejected; a federal return can be accepted while a state return is still missing. This status discipline prevents a polished PDF from being mistaken for finished compliance work.

How to handle a discrepancy

When a source form, ledger, payroll report, or software preview disagrees with another record, stop before filing and identify which amount represents the underlying transactions. Trace the difference by vendor or employee, date, invoice or payroll run, payment channel, and account. Common causes include a payment posted to the wrong year, a void recorded after a report was generated, a card payment included with checks, a duplicate import, an incorrect taxpayer name, or a late adjustment. Record the explanation and the correcting entry or form request.

Do not erase the trail by overwriting the original report. Save the first version, the reconciliation, the corrected version, and the approval. If a third party supplied an incorrect information return, request a formal correction and retain the correspondence. If a return was already transmitted, use the current correction procedure for that form and channel. A corrected recipient copy without a corresponding agency correction can leave the records inconsistent.

Federal filing is only one layer

Federal acceptance does not settle state or local obligations. A state may use a different threshold, worker test, filing portal, account number, transmittal, or due date. Some states receive eligible information through a combined program, while others require a direct submission. Verify the jurisdictions connected with the payer, recipient, employee, work location, withholding, and business activity. Save state confirmations separately so they are not hidden behind the federal acceptance.

Make next year easier

Turn the year-end work into a monthly control. Collect identity forms during onboarding, code payment methods consistently, reconcile payroll and vendor activity each month, and flag vendors or income streams that need special treatment. Schedule a fall review of missing forms, classification questions, state registrations, and electronic-filing access. By year-end, the team should be validating a maintained file instead of reconstructing twelve months of transactions under a deadline.

Practical implementation notes

Tax matrix

Track each earning and deduction code across federal withholding, Social Security, Medicare, FUTA, and every state or local tax.

Agency register

Record account number, filing form, deposit frequency, due dates, portal, authorized users, notices, and closure status.

Quarter close

Reconcile payroll, deposits, Form 941, wage bases, general ledger liabilities, and any prior-period corrections.

Year-end bridge

Tie four quarters to Forms W-2 and W-3, Form 940, state wage reports, taxable fringes, and employee delivery.

For the next layer of context, see this related guide, the companion reporting article, and the connected workflow.

If the form, books, and filing status do not agree, Steady can help reconcile the source data and prepare a clean filing package through its specialist service.