Payroll Deductions: A Beginner’s Guide

Typical payroll deductions include federal income tax withholding, employee Social Security and Medicare taxes, state and local withholding, benefits, retirement contributions, health accounts, garnishments, child support, tax levies, union dues, and other authorized items. Mandatory deductions follow statutes or valid orders. Voluntary deductions require appropriate authorization and plan support. Pretax treatment is specific to the governing tax rule and may differ for federal income tax, Social Security, Medicare, FUTA, and state taxes. For 2026, employee Social Security tax is 6.2 percent up to the $184,500 wage base, Medicare tax is 1.45 percent without a wage base, and Additional Medicare Tax withholding begins after an employer pays an employee more than $200,000 in the calendar year.

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

Gross pay is the starting point

Regular wages, overtime, bonuses, commissions, tips, taxable fringes, and other earnings must be correct before deductions are applied.

Tax withholding differs from a benefit deduction

Federal income tax uses Form W-4 and Publication 15-T, while Social Security and Medicare use taxable wage bases and statutory rates.

Pretax is tax-specific

A deduction can reduce federal income-tax wages but not Social Security, Medicare, FUTA, or a state wage base.

Employer and employee amounts are separate

Employer taxes and benefit contributions are expenses or liabilities, not automatic reductions of employee net pay.

Orders have priority and limits

Child support, creditor garnishments, bankruptcy orders, and tax levies use different definitions, priorities, protected amounts, and remittance rules.

Authorization and effective dates matter

Voluntary deductions should identify amount or formula, frequency, start, stop, refund, and change procedures.

Every withheld dollar becomes a liability

Reconcile payroll registers to tax deposits, benefit vendors, retirement plans, agencies, employee balances, bank activity, and the ledger.

Step-by-step workflow

1. Map every earning. Document taxability, overtime treatment, benefit interaction, general-ledger account, and effective date.
2. Inventory deductions. List taxes, benefits, retirement, health accounts, garnishments, levies, dues, loans, charitable items, and other deductions.
3. Classify authority. Identify statute, employee authorization, plan document, court order, agency notice, collective agreement, or repayment agreement.
4. Configure tax treatment. Set federal income tax, Social Security, Medicare, FUTA, and state wage treatment separately.
5. Apply limits and priority. Document annual limits, disposable-earnings rules, order priority, arrears, protected amounts, and employer fees.
6. Test payroll scenarios. Run regular, bonus, overtime, leave, low-net-pay, termination, retroactive, multiple-order, and limit-reaching cases.
7. Review the pay statement. Confirm descriptions, current amounts, year-to-date amounts, taxable wages, net pay, and employee communication.
8. Fund and remit. Deposit taxes and transmit benefit, retirement, garnishment, levy, and other liabilities by the correct deadlines.
9. Reconcile each cycle. Tie employee deductions to payroll liabilities, payments, vendor or agency acknowledgments, refunds, and the general ledger.

Worked example

An employee earns $2,500 in a pay period and has federal and state withholding, Social Security and Medicare taxes, a section 125 health deduction, a retirement deferral, and a child-support order. Payroll first determines taxable wages for each tax, then applies withholding and the employee taxes. The health and retirement items follow their plan-specific tax treatment. The order is calculated under the applicable disposable-earnings and priority rules. Every deduction is tied to a liability and later to a deposit or remittance.

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

• Marking every benefit pretax. Tax treatment depends on the plan and tax, not the deduction label.
• Using one taxable wage base. Federal income tax, Social Security, Medicare, FUTA, and states can differ.
• Deducting employer taxes from employees. Employer shares generally do not reduce employee pay.
• Ignoring written authorization. Maintain support for voluntary deductions and changes.
• Applying one garnishment percentage. Orders, priorities, protected earnings, states, and family support rules vary.
• Failing to stop at a limit. Monitor annual employee and employer limits and catch-up eligibility.
• Leaving negative net pay. Use documented insufficiency and arrears rules rather than forcing deductions.
• Reconciling only at year-end. Outstanding liabilities and rejected remittances need prompt detection.

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.

Assign one owner and one reviewer to the calendar. The owner prepares the source schedule and resolves open items; the reviewer tests identities, totals, rule references, filing status, and evidence. Record the date of the official guidance used because form pages and software menus can change during the filing season. If a rule is uncertain, document the question and escalate it before the deadline rather than placing an unsupported assumption in the final file. This short control list protects both accuracy and continuity when another bookkeeper, payroll specialist, or tax preparer takes over the work. Save the checklist with the return so next year’s team can see which controls were completed and which exceptions required follow-up.

Practical implementation notes

Deduction master

Track code, description, authority, tax treatment by tax, limit, priority, vendor, account, remittance date, and effective dates.

Order register

Record agency, case, employee, service date, priority, formula, protected amount, arrears, fees, remittance, and release.

Paycheck test matrix

Include regular, supplemental, low-wage, overtime, leave, termination, retroactive, annual-limit, and multiple-order cases.

Liability reconciliation

Compare payroll register, payable account, bank payment, vendor or agency receipt, employee balance, and correction.

Deeper planning points

New tip and overtime deductions do not make the wages tax-free in payroll

Current individual deductions and payroll taxability are different questions. For 2026, qualified tips and qualified overtime compensation can affect an individual’s income-tax return and may be reflected through an updated Form W-4. The wages and tips generally remain subject to Social Security and Medicare taxes under the current employer guidance. Configure payroll from official withholding and wage rules rather than subtracting a projected personal tax deduction directly from wages.

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.