Payroll Tax vs. Income Tax: What's the Difference?

Payroll tax and income tax come out of the same paycheck, but they fund different programs and follow different rules. Payroll tax is Social Security plus Medicare (together called FICA) plus federal and state unemployment. It's flat-rate, partly capped, and shared between worker and employer in equal halves on the FICA portions. Income tax is the progressive tax on taxable income, owed entirely by the employee even though the employer cuts the check to the Treasury.

Before benefits and workers' compensation, employer-side payroll taxes often add roughly 8% or more to W-2 wage cost, depending mainly on SUTA and state rules. Two payroll-tax layers run entirely on the employer side, which is where that extra load comes from. This guide walks all six layers in the order they hit one worker's pay (Tasha Greenwood, a $96,000 single filer in North Carolina) so the numbers reconcile from gross to net to fully-loaded employer cost.

The 2026 rates and thresholds at a glance, before any of the layers stack:

• Employee FICA totals 7.65 percent: 6.2 percent Social Security up to the $184,500 wage base per the SSA 2026 contribution and benefit base, plus 1.45 percent Medicare uncapped
• Employer FICA matches the employee's 7.65 percent dollar-for-dollar; the match never appears on the employee's stub
• Federal income tax runs through seven progressive brackets from 10 to 37 percent with a $16,100 single / $32,200 MFJ / $24,150 HoH standard deduction for tax year 2026 per the IRS 2026 inflation adjustments release
• FUTA is 0.6 percent effective on the first $7,000 of wages, employer only
• SUTA varies state by state, typically 0 to 10 percent on a wage base from $7,000 to over $72,000
• State income tax stacks on top in 41 states plus DC; local income tax in roughly 5,000 jurisdictions concentrated in OH, PA, MI, IN, KY, MD, MO, plus NYC, Philadelphia, Detroit

State rates change on each agency's calendar; confirm any borderline figure against the underlying IRS publication, SSA fact sheet, or state workforce-agency page. The MyStubs paycheck tax calculator models gross-to-net by state using these 2026 rates if you want to run your own numbers alongside Tasha's.

#The Six Tax Layers on Every U.S. Paycheck

A W-2 wage in 2026 is taxed through six layers: three on the employee, one on the employer only (FICA match), one combined unemployment-tax layer covering both FUTA and SUTA, and two more (state and local income tax) that ride on the same gross. They stack in the same order regardless of pay frequency, but the dollar weight of each varies sharply by where the worker lives and what they earn.

Layers 1, 2, and 4 are payroll tax. Layer 3 is federal income tax. Layers 5 and 6 are state and local income tax. The rest of this guide walks all six through Tasha's actual numbers. Layer 4 is presented with two sub-tables (FUTA and SUTA) because they apply under different rate and wage-base rules even though they cover the same unemployment-insurance system.

#Meet Tasha Greenwood — One Worker, Six Layers, Reconciling Numbers

Tasha is a single-filer software engineer at a 30-person logistics company in Charlotte, North Carolina, earning $96,000 paid biweekly. She files a standard W-4 with no dependents, contributes nothing to a 401(k) or HSA in this base scenario, and lives in a city with no local income tax. Each layer below decomposes a slice of the same $96,000. Never a new hypothetical. (Annual gross $96,000 paid biweekly = $3,692.31/check; single filer in NC; no local tax; base case has no pretax elections.)

The annual totals every layer below has to reconcile against:

Every section below explains how one row gets calculated and where the rate or threshold is published.

#Social Security and Medicare — The Employee's FICA Half

The Federal Insurance Contributions Act, IRC § 3101, funds Social Security (OASDI) and Medicare (HI) through wage contributions. The employee's share is 6.2 percent Social Security up to the annual base plus 1.45 percent Medicare with no cap. That's 7.65 percent total on the first $184,500, then 1.45 percent on every dollar above.

Use this row to read the SS/OASDI and Medicare lines on a stub, and W-2 Boxes 4 (SS withheld) and 6 (Medicare withheld).

Tasha never crosses $184,500, so Social Security withholding never stops mid-year. The Additional Medicare Tax is the seam between FICA and income tax. Statutorily it sits inside FICA under IRC § 3101(b)(2), but it functions like an income surtax: 0.9 percent on the employee's wages above $200,000 in a calendar year with a single employer, regardless of filing status at the withholding layer. The employer doesn't match it. The employee reconciles the true liability on Form 8959 with the 1040 using the joint-filer threshold of $250,000 MFJ or $200,000 single. Tasha sits far below the trigger, so layer 1 ends at $7,344.

#The Employer's FICA Match — The Line That Never Hits the Stub

Every dollar the employee pays in FICA, the employer pays again from its own funds. Per IRS Publication 15, the employer deposits both halves on the IRS-assigned schedule and reconciles on quarterly Form 941.

The match never appears on Tasha's stub but does appear on her employer's 941. If a CFO is pricing a $96,000 W-2 hire against a $96,000 contractor, this is the line that flips the math. The contractor pays 15.3 percent in SE tax instead, and the company saves the employer FICA match plus FUTA plus SUTA. The W-9 vs W-2 explainer walks through the documentation that drives the classification call.

#Federal Income Tax — Progressive, Annual, and Entirely on the Employee

Layers 1 and 2 are flat-rate, capped, and split equally between worker and employer. Layer 3 breaks every one of those rules. Federal income tax is the tax on taxable income under Subtitle A of the Internal Revenue Code. Unlike FICA, it's progressive, annual, and 100 percent the employee's liability. The employer's only job is to estimate the annual figure across pay periods using the percentage-method tables in IRS Publication 15-T and remit. If the estimate is off, the employee (not the employer) owes the shortfall on April 15.

Per Revenue Procedure 2025-32, the 2026 single-filer brackets:

The 2026 standard deduction is $16,100 single, $32,200 MFJ, and $24,150 HoH per the IRS 2026 inflation adjustment release. Tasha's calculation:

Tasha's effective federal rate is 12.80 percent of gross. Her marginal rate is 22 percent. Every extra $1,000 of wages costs $220 until she crosses $105,700. That gap between effective and marginal is what people miss when they say "I'll lose money taking a raise" — they almost never do.

#Unemployment Tax — FUTA and SUTA, Employer-Funded

Layers 1 through 3 cover FICA and federal income tax on the wage itself. Layer 4 covers the two unemployment-insurance taxes that ride on top: FUTA on the federal side and SUTA on the state side. Both are funded by the employer in nearly every state and reconciled on separate annual returns, but they cover the same unemployment-insurance system and are presented together here for that reason.

FUTA (federal): The Federal Unemployment Tax Act, IRC §§ 3301–3311, funds administration of state UI programs. The statutory rate is 6.0 percent on the first $7,000 of wages. Employers who pay state UI timely and operate outside a federal credit-reduction state receive a 5.4 percent credit, dropping the effective FUTA rate to 0.6 percent, a maximum of $42 per employee per year, reconciled on annual Form 940. Credit-reduction-state status is updated yearly at DOL FUTA Credit Reductions.

SUTA (state): FUTA funds federal administration of the unemployment system; SUTA funds the benefits themselves, collected by each state on its own wage base and rate. Rates run from low end-of-range for favorable experience ratings to 6 to 10 percent for new employers in high-turnover industries. Wage bases run from $7,000 (FL, CA, TN) past $72,000 in Washington.

North Carolina's 2026 SUTA wage base is $34,200, and established-employer rates run from 0.06% to 5.76% depending on experience rating per the NC Division of Employment Security 2026 tax rate schedule. NC's beginning-employer rate is 1.0% for the first three years. This example uses 1.0% as a simple illustrative rate; established employers receive experience-rated percentages that can be lower or higher depending on three-year claims experience.

Alaska, New Jersey, and Pennsylvania also collect a small employee SUTA contribution; everywhere else SUTA is employer-only.

If Tasha's employer instead held a 0.06% favorable rating, the annual SUTA would be $20.52; at the 5.76% maximum-experience-rating end of NC's range, $1,969.92. That spread is why high-turnover industries fight so hard over their UI experience rating. The $342 figure inside the master reconciliation uses the 1.0% beginning-employer rate. The SMB payroll recordkeeping checklist lays out the new-state SUTA registration sequence.

#State Income Tax — Flat, Progressive, or Absent

State income tax rides on the same gross wage as federal but follows each state's own brackets, standard deduction, and credits. Forty-one states plus DC tax wages; nine don't. North Carolina taxes wages at a flat 3.99 percent for tax years after 2025 per the NC Department of Revenue tax rate schedule, after a 2026 single standard deduction of $12,750. (The 2025 rate was 4.25%; the rate reduction took effect for 2026 and later years under NC Session Law 2023-134.)

Tasha's NC layer:

The same $96,000 gross produces very different state-tax lines by residency. The California row uses the actual effective rate on $96,000 of single-filer income, not the 9.3% top marginal rate (which only applies to dollars above $76,397 of CA taxable income); after CA's standard deduction the effective rate at this income level is closer to 5.8%:

Source: Tax Foundation 2026 state rate tables cross-checked against each state's revenue-department publication and bracket math. Effective rates differ from marginal rates because only the income inside the top bracket is taxed at that bracket's rate; the lower brackets keep their own (lower) rates. Figures are illustrative; each state's own deduction and bracket structure produces a slightly different number.

#Local Income Tax — The Forgotten Layer

State tax in layer 5 hits 41 states; layer 6 hits far fewer jurisdictions but lands hard wherever it does. Roughly 5,000 U.S. local jurisdictions impose income tax on top of state. The heaviest concentrations sit in OH, PA, MI, IN, KY, MD, and MO, plus named cities like NYC (top resident rate 3.876 percent), Yonkers, Philadelphia (3.75 percent resident, 3.44 percent nonresident for 2026 per the Philadelphia Department of Revenue), Detroit, and Kansas City.

Tasha lives in Charlotte, North Carolina, for the entire post. North Carolina has no statewide municipal wage income tax, and Charlotte doesn't impose one. Tasha's layer 6 is $0 and stays that way. The full state-and-local breakdown for a $96,000 single filer in Charlotte:

For readers in cities that do impose a local wage tax, the comparison table below shows how the layer-6 line stacks for the same $96,000 single filer in six other resident cities. These are reference points, not Tasha's actual numbers; Tasha stays in Charlotte through every section of the post:

The deeper guide on state-by-state paycheck differences walks through the largest cross-state swings.

#Tasha's Full Reconciliation: Gross to Net to Employer Cost

All six layers apply to the same $96,000. Every dollar of Tasha's annual gross is accounted for: withheld from her paycheck, paid behind the scenes by her employer, or kept as net. The bracket-stack math for FIT lives in Layer 3 above; this table is the totals roll-up:

Tasha takes home $73,044.32 out of $96,000, a 24.4 percent wedge. Her employer spends $103,728 to put that net in her account, an 8.0 percent employer-side load above her gross. A reconstruction of any one of her biweekly stubs, showing each withholding line in the order a verifier expects, is exactly what the MyStubs paystub generator is built to produce from real wages an employer actually paid.

If Tasha switched to 1099 contractor status at the same $96,000, the FICA layers would double on her side because there's no employer match to pair with. Schedule SE would collect the full 15.3 percent (12.4% Social Security + 2.9% Medicare) on 92.35 percent of net SE earnings, roughly $13,564 versus the $7,344 employee FICA she pays as a W-2 worker. Half the SE tax is deductible above the line, but the freelancer still ends up paying about $4,500 more in total tax on the same $96,000. The deeper walkthrough on classification documentation is in reporting self-employment income without a 1099 and W-9 vs. W-2.

#How Pretax 401(k), Roth, and HSA Move the Layers

Each pretax election reduces some layers and not others. Tasha contributing $5,000 a year to a pretax 401(k), $5,000 to a Roth 401(k), or $5,000 to an HSA via Section 125:

The HSA-via-cafeteria-plan is the only retirement-style account escaping both FICA and income tax on the way in. That's a 7.65 percent advantage over traditional pretax 401(k) for an under-cap earner, and it compounds over a working life. The Pub 15-B fringe benefits guide lists every Section 125 election line by line.

#Common Mistakes That Cost Real Money

Errors the IRS or a state agency will assess against the employer:

• Misclassifying a W-2 employee as a 1099 contractor. Under IRC § 3509, the employer owes back FICA on both sides, FUTA, withheld FIT, and penalties
• Failing to begin Additional Medicare withholding when an employee's YTD wages cross $200,000 with that employer
• Skipping SUTA registration in a new state where a remote W-2 employee performs services
• Missing the FUTA quarterly deposit when cumulative liability passes $500 in a quarter
• Filing a 941 with FICA wages that don't reconcile to W-2 Box 3 and Box 5 totals
• Forgetting the credit-reduction-state surcharge on 940 if the business operates in a flagged state

Errors that cost the employee real money on April 15:

• Claiming "exempt" on a W-4 without meeting the safe-harbor (zero prior-year tax plus reasonable expectation of zero this year)
• Not updating the W-4 after a second job starts mid-year. Total withholding calibrates as if each employer is the only one
• Ignoring estimated-tax payments on freelance income alongside a W-2 day job
• Missing the local-tax line entirely when working remotely in a city that imposes one (NYC, Philadelphia, Detroit)
• Treating a Roth 401(k) contribution as if it lowers Box 1 wages
• Not reconciling Additional Medicare withholding on Form 8959 when MFJ with combined wages between $200,000 and $250,000

The fix for almost every employee-side item is the same: rerun the IRS Tax Withholding Estimator at every job change, marriage or divorce, and side-income start.

When a worker needs HR to adjust withholding mid-year, a short written request keeps payroll on documented footing. Copy, paste, and fill the bracketed fields:

Tasha used the template to add $50 per check of extra federal withholding after a side-consulting contract started in May, raising her per-check withholding from $472.69 to $522.69 and her annual cushion by $1,300.

#Example Layer Stack by Worker Type

The six layers apply to every U.S. wage earner, but each type of worker faces a different subset.

For an employer running W-2 payroll on a worker like Tasha. This is the employer-side calendar, not the worker checklist. Workers should use the W-4 adjustment template above and the IRS Tax Withholding Estimator instead:

Tasha's employer ties the calendar together with the MyStubs paycheck tax calculator to model her gross-to-net under any pretax-election scenario; the calculator's state file uses the 2026 rates named throughout this guide and is updated on each state's own publication calendar so layers 5 and 6 stay current.

#Worker Rights and the Statutory Floor

A worker can't opt out of Social Security or Medicare except in narrow statutory cases: certain religious-conscience cases under IRC § 1402(g), some F-1 visa students under Pub 519, and a handful of state-and-local government workers covered under a Section 218 agreement. Outside those, every W-2 wage faces the full 7.65 percent employee FICA. The IRS Topic 751 page lays out coverage rules.

Wage-claim mechanics. When an employer skips payroll-tax withholding, fails to issue a W-2, deducts amounts the worker didn't authorize, or pays below the federal/state minimum, the worker has three independent paths: a private wage-claim suit under state law (state attorney generals, departments of labor, and labor commissions all maintain a complaint process); a federal DOL Wage and Hour Division complaint reaching back two years (three for willful violations) under FLSA § 255; or an IRS Form SS-8 misclassification determination that triggers Section 3509 reclassification back-tax on the employer. The DOL WHD recovered $213 million in back wages in fiscal 2024 on the same five recurring violations described in post 14's Worker Rights section. Workers who file in good faith are protected from retaliation under FLSA § 15(a)(3).

The DOL contact path. Workers can file a DOL WHD complaint online, by mail, or at the local district office. Filing is free, the worker need not be a U.S. citizen, and the WHD investigator handles the employer interview, payroll-record subpoena, and back-wage assessment without the worker needing counsel. The state equivalent (NC Department of Labor Wage and Hour Bureau in Tasha's case) can recover state-floor differentials federal investigators cannot. A worker can pursue both simultaneously.

Misclassification consequences. The federal Fair Labor Standards Act governs minimum wage, overtime, and recordkeeping; state wage-theft statutes give workers a private right of action. If misclassification is found, the employer owes back FICA on both sides, FUTA, withheld FIT, and interest under Section 3509. Section 6672 trust-fund-recovery penalties apply if the employer knowingly withheld taxes but failed to remit, not for the underlying classification error itself.

Retaliation. Termination, demotion, schedule reduction, or transfer in response to a wage complaint is independently actionable under FLSA § 15(a)(3) and parallel state statutes. The remedies include reinstatement, back pay, and front pay. The two-year statute begins on the adverse-action date, not the underlying wage violation.

#Official External Sources