Current as of January 02, 2026
Key Rates:
- Social Security: 6.2% employee + 6.2% employer; wage base $184,500.
- Medicare: 1.45% each; no wage base (+0.9% employee on wages >$200,000).
- Additional Medicare withholding: 0.9% on wages >$200,000 (no employer match).
- FUTA: 6.0% employer-only on first $7,000/employee; effective 0.6% with timely state payments.
Federal Tax Responsibilities
| Tax Type | Paid By | Description | Tax Form(s) |
|---|---|---|---|
| Federal Income Tax | Employee (withheld) | Based on brackets and W-4 | W-4 / 1040 |
| Social Security | Shared (50/50) | Up to $184,500 wage base | 941 / 944 |
| Medicare | Shared (50/50) | Unlimited; +0.9% high earners | 941 / 944 |
| FUTA (Unemployment) | Employer only | Funds federal unemployment oversight | 940 |
| Self-Employment Tax | Contractor only | Combined FICA shares | Schedule SE |
Key Notes:
- Employees: Income withheld; half FICA.
- Employers: Match FICA; full FUTA.
- Contractors: Full FICA (SE tax) + income tax via quarterly estimates.
Business Structures & Tax Treatment
| Entity Type | Tax Treatment | Best For |
|---|---|---|
| Sole Proprietorship | Pass-through (Schedule C) | Single-owner, low-risk startups |
| LLC (Single Member) | Pass-through (Disregarded Entity) | Simple setup with liability protection |
| S-Corp | Pass-through (Form 1120-S) | Established businesses to reduce SE taxes |
| C-Corp | Double taxation (entity + dividends) | Companies planning to scale or go public |
Key Concepts:
- Pass-through: Profits to owners' personal returns; no entity income tax.
- Deductions: Business expenses subtract from revenue.
- Nexus: State tax presence triggers obligations.
- Estimated Taxes: Quarterly for owners/contractors.
FUTA Details
- Employer-only; first $7,000/employee/year.
- Base 6.0%; credit up to 5.4% → effective 0.6%.
- Resources: IRS Pub 15 (Circular E); Form 940 instructions.
- State SUTA: Varies; search "[State] Unemployment Insurance Tax Rates 2026".
Federal Payroll Forms
| Form | Purpose | Who Files | Frequency | Key Taxes Reported | Notes |
|---|---|---|---|---|---|
| 941 | Quarterly: wages, FITW, SS, Medicare | Most non-agricultural employers | Quarterly | FITW, Social Security, Medicare | Deposits monthly/semiweekly; Schedule B if needed |
| 944 | Annual simplified 941 | Small employers (liability ≤$1,000; IRS-approved) | Annual | FITW, Social Security, Medicare | Deposits if ≥$2,500 quarterly |
| 943 | Annual agricultural employees | Farm/ranch employers | Annual | FITW, Social Security, Medicare | Cash wages; separate FUTA |
| 940 | Annual FUTA | Employers meeting thresholds | Annual | FUTA only | Deposits if >$500; state credits |
Common Rules:
- Payments: EFTPS (separate from filing).
- Deposits: Based on liability.
- Penalties: Late filing/deposit (2-15%).
- Amendments: -X forms (941-X etc.); 940 amended by checking box.
- E-filing: Mandatory ≥10 returns/year.
- Exclusions: Self-employed (Schedule SE); household (Schedule H).
Payroll Corrections & Amendments
| Original Form | Amended Form | Purpose | Notes |
|---|---|---|---|
| 941 | 941-X | Correct quarterly FITW/SS/Medicare | Per quarter; e-file available |
| 944 | 944-X | Correct annual | Small employers |
| 943 | 943-X | Correct agricultural | |
| 940 | Check "Amended" box on new 940 | Correct FUTA | No separate X form |
Common Errors:
- Misreported wages/taxes.
- Worker misclassification.
- Incorrect withholdings/deposits.
- Overlooked fringes.
Process:
- File amended ASAP (within 3 years).
- Pay underpayment with filing (interest-free if timely).
- Explain on form (e.g., line 43 on 941-X).
- Overpayment: Refund or apply forward.
- Employee impact: Issue W-2c.
Deposit Fixes:
- Over: Adjust next or amend.
- Under: Pay via EFTPS + amend.
Penalty Mitigation:
- Timely correction often reduces/waives.
- Reasonable cause may abate.
State-Level Payroll
Varies (SUI, SITW, disability/SDI).
Search Terms (replace [STATE]):
- "[STATE] employer payroll tax forms"
- "[STATE] unemployment insurance tax return filing"
- "[STATE] state income tax withholding form"
- "[STATE] quarterly wage report requirements"
- "[STATE] SUI tax rate and wage base 2026"
- "site:[STATE].gov payroll tax forms"
Quick FAQs
- FICA forms: 941/944.
- Sole vs S-Corp: Both pass-through; Schedule C vs 1120-S.
- FUTA wage base: $7,000/employee; no tax on excess.
Footnotes:
- Related: W-2/W-3 annual reconciliation; W-2c for corrections.
- Causal: Errors/deposit mismatches → audits/penalties; amendments reconcile/mitigate.
- Verify IRS.gov for latest (e.g., Pub 15 2026); no major form changes noted beyond standard updates.