US Tax Tools

Self-Employment & 1099

Everything self-employed workers, freelancers, and 1099 contractors need to know about self-employment tax, quarterly payments, deductions, and business structure.

23 articles

Self-Employment

How to Calculate Estimated Tax Payments

Who has to pay, how much (the 90%/100%/110% safe harbors), the annualized method for uneven income, a full worked example, and how to pay.

self-employment estimated-tax quarterly-tax
Income Tax

How to Fill Out a W-4

W-4 guidance by situation: single, married filing jointly, and dual-income couples — plus multiple jobs, dependents, and extra withholding done right.

income-tax withholding w4
Self-Employment

Employer Payroll Taxes Explained: FICA, FUTA & SUTA

What employers actually owe on top of gross wages: 7.65% employer FICA, FUTA on the first $7,000, and state SUTA — with worked examples.

self-employment payroll-tax fica
Self-Employment

Self-Employed Health Insurance Deduction (Form 7206)

The SE health insurance deduction is above-the-line, capped by net SE profit and age-based LTC limits. See who qualifies and how Form 7206 works.

self-employment health-insurance deduction
Self-Employment

Self-Employment Tax Rate 2026: 15.3% Explained

The 2026 self-employment tax is 15.3% — 12.4% Social Security (capped at $184,500) plus 2.9% Medicare (uncapped). See the 92.35% rule and the half-SE-tax deduction.

self-employment fica payroll-tax
Income Tax

How to Fill Out Form W-4 in 2026: Step-by-Step

A step-by-step guide to the 2026 Form W-4: filing status, the multiple-jobs box, dependent credits, deductions, and extra withholding done right.

income-tax w4 withholding
Self-Employment

Schedule K-1 Explained: How Partners, S-Corp Shareholders & Trust Beneficiaries Are Taxed

Walkthrough of K-1 (Forms 1065, 1120-S, 1041) — the boxes that drive your 1040, what each line means, basis tracking, at-risk and PAL limits.

schedule-k-1 partnership s-corp
Self-Employment

§199A QBI Deduction 2026: 20% Pass-Through Deduction & the Specified Service Trade Phase-Out

How the §199A 20% qualified business income deduction works in 2026 — the taxable income thresholds, the SSTB (specified service trade) phase-out, and the W-2 wage/UBIA limit.

section-199a qbi qualified-business-income
Investment

RSU Sell-to-Cover Explained: How Many Shares Disappear at Vest

Sell-to-cover withholds shares at vest to pay federal tax (typically 22% supplemental), Social Security, Medicare, and state. Why your net-share count is always less than you expected, the supplemental withholding gap, and when same-day-sale or cash withholding is the better choice.

rsu stock-compensation equity
Self-Employment

Q2 Estimated Tax Due June 15 2026 — Safe Harbor, Form 1040-ES, and Penalties (IRS)

Complete guide to the Q2 2026 estimated tax payment due June 15: safe harbor rules (100%/110%/90%), Form 1040-ES vouchers vs EFTPS vs IRS Direct Pay, underpayment penalty math, and a worked freelancer example.

quarterly-tax estimated-payments self-employment
Self-Employment

Estimated Tax Underpayment Penalty: How It's Calculated and How to Avoid It

The IRS charges an underpayment penalty when you don't pay enough tax throughout the year. Learn exactly how the safe harbor rules work, 2025 quarterly due dates, and the annualized income method for uneven earners.

underpayment-penalty estimated-tax safe-harbor
Investment

RSU Tax Guide: How Restricted Stock Units Are Taxed at Vesting and Sale

Restricted stock units are taxed twice — once as ordinary income at vest, again as capital gains at sale. A complete guide to withholding, double-taxation traps, and the tax-smart way to manage your RSU grant.

rsu stock-compensation equity
Self-Employment

1099 Filing Deadlines and Penalties 2026

1099-NEC is due January 31, 2026. Learn all 1099 filing deadlines, late filing penalties ($60–$310 per form), intentional disregard penalties, and how to avoid IRS enforcement.

1099 self-employment deadlines
Self-Employment

LLC vs. S-Corp: Which Business Structure Saves More in Taxes?

Compare the tax implications of an LLC versus an S-Corp for self-employed individuals, including SE tax savings, reasonable salary requirements, and compliance costs.

self-employment 1099 business-structure
Self-Employment

Quarterly Estimated Tax Payments Explained

Who must pay estimated taxes, how the safe harbor rules work, how to avoid underpayment penalties, and the 2026 due dates for quarterly payments.

quarterly-tax estimated-tax self-employment
Self-Employment

Self-Employment Tax: How It Works

Understand the 15.3% self-employment tax, how to deduct half of it, what Schedule SE requires, and how it differs from W-2 FICA withholding.

self-employment fica schedule-c
Self-Employment

W-2 vs. 1099: Tax Differences Explained

Understand the key tax differences between W-2 employee income and 1099 independent contractor income — including self-employment tax, withholding, deductions, and benefits.

1099 self-employment freelance
Deductions

Home Office Deduction Guide: Who Qualifies and How to Calculate It

Learn who can claim the home office deduction, the difference between the simplified and regular methods, and what expenses qualify — including key rules for remote employees.

home-office deductions self-employment
Self-Employment

Side Hustle Tax Guide: How Gig Income Is Taxed in 2025

Learn how side income and gig work is taxed, including 1099-K reporting, estimated taxes, common deductions, and the hobby vs. business distinction.

side-hustle gig-economy self-employment
Self-Employment

1099 Freelancer Tax Guide: Everything You Need to Know for 2025

A complete guide to 1099 freelancer taxes in 2025: self-employment tax, quarterly payments, top deductions, and exactly how much to set aside so you never get blindsided at tax time.

1099 freelance self-employment
Income Tax

Lottery and Gambling Tax Guide: How Winnings Are Taxed in 2025

How lottery winnings and gambling income are taxed at the federal and state level in 2025, including lump sum vs. annuity decisions, withholding rules, and how to deduct gambling losses.

gambling-tax lottery-tax winnings
Self-Employment

Self-Employment Tax Guide: What Freelancers and 1099 Workers Need to Know

A complete guide to self-employment tax for freelancers and independent contractors, including the 15.3% SE tax rate, deductions, and quarterly estimated payment due dates.

self-employment 1099 freelance
Self-Employment

Quarterly Estimated Tax Payments: Who Needs to Pay and How to Calculate

Learn who must make quarterly estimated tax payments, the 2026 due dates, how to calculate your payments, the safe harbor rule, and how to avoid underpayment penalties.

quarterly-tax estimated-payments self-employment

Related Calculators