How It Works
This page explains the calculation methodology behind FreelanceVsFulltime's Freelance vs Full-Time comparison. All tax figures are based on 2025 IRS publications and publicly available state tax schedules. This calculator provides estimates for informational purposes only — not tax advice.
1. Self-Employment (SE) Tax
Freelancers pay both the employee and employer portions of Social Security and Medicare taxes, collectively called self-employment tax. The calculation follows IRS Publication 334 and Schedule SE.
Calculation Steps
- SE base: Net self-employment income × 92.35% (reflects the employer-equivalent deduction)
- Social Security: SE base × 12.4%, capped at the 2025 wage base of $168,600
- Medicare: SE base × 2.9% (no cap)
- Additional Medicare surtax: 0.9% on SE base above $200,000 (single) or $250,000 (married filing jointly) — per IRC §3103 / IRS Notice 2013-45
- Deductible half: 50% of total SE tax is deductible from gross income when calculating adjusted gross income (AGI) — IRC §164(f)
2. Federal Income Tax
Federal income tax is calculated using 2025 progressive brackets from IRS Revenue Procedure 2024-40. Taxable income is gross income minus the standard deduction and applicable deductions.
2025 Standard Deductions
| Filing Status | Amount |
|---|---|
| Single / Married Filing Separately | $14,600 |
| Married Filing Jointly | $29,200 |
| Head of Household | $21,900 |
2025 Federal Tax Brackets — Single Filer
| Taxable Income | Rate |
|---|---|
| $0 – $11,925 | 10% |
| $11,925 – $48,475 | 12% |
| $48,475 – $103,350 | 22% |
| $103,350 – $197,300 | 24% |
| $197,300+ | 37% |
Married filing jointly and head of household brackets are also supported — thresholds differ. See IRS Rev. Proc. 2024-40 for full bracket tables.
3. Freelance-Specific Deductions
In addition to the standard deduction, self-employed individuals may qualify for the following above-the-line deductions that reduce AGI:
Self-Employed Health Insurance Deduction IRC §162(l)
Self-employed individuals can deduct 100% of health insurance premiums paid for themselves and their family from gross income. The deduction cannot exceed net self-employment income.
Qualified Business Income (QBI) Deduction IRC §199A
Eligible self-employed taxpayers can deduct up to 20% of qualified business income, subject to income thresholds and business type restrictions. This calculator applies the deduction at 20% of net business income where the input exceeds the standard deduction — without applying the higher-income phase-out rules (which depend on wage/capital factors not captured in this tool).
Business Expenses
Ordinary and necessary business expenses (home office, equipment, software, professional services, etc.) reduce net self-employment income before all other calculations. Entered as an annual dollar amount in the calculator.
4. Full-Time Total Compensation
Full-time compensation extends beyond base salary. The calculator adds the following employer-provided benefits to gross salary to compute total compensation:
| Benefit | How Valued |
|---|---|
| Employer 401(k) match | Percentage of salary matched by employer (e.g. 4% of $100K = $4,000/year). 2025 employee deferral limit: $23,500 per IRS Notice 2024-80. |
| Employer health insurance | Annual employer premium contribution entered directly. National average employer contribution is approximately $7,000–$8,000/year for single coverage (KFF Employer Health Benefits Survey 2024). |
| Paid time off (PTO) | Monetized as: (Annual salary ÷ 260 working days) × PTO days per year. Represents the salary-equivalent value of paid leave. |
5. State Income Tax
State income tax is approximated using a single effective rate per state, calibrated around $100,000 of taxable income. All 50 states and Washington DC are supported.
No state income tax (0%): Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, Wyoming
Notable rates (effective at ~$100K): California 8.3%, Oregon 8.2%, Hawaii 8.2%, DC 8.5%, New York 6.0%
State rates are approximations based on publicly available 2024 tax schedules. They may not reflect local taxes, credits, or deductions specific to your situation. Sources: Individual state Department of Revenue publications.
6. Break-Even Hourly Rate
The break-even hourly rate is the freelance rate at which after-tax net income equals the full-time after-tax net income (including monetized benefits).
The calculator solves iteratively:
- Compute full-time net income (salary + benefits − taxes)
- Estimate freelance gross required to produce the same net income, accounting for SE tax, deductions, and business expenses
- Divide by annual billable hours (hours/week × 50 billable weeks)
Rates above the break-even are financially advantageous for freelancing; rates below favor full-time employment on a net-income basis.
7. Limitations & Disclaimer
For informational purposes only. Not tax advice.
- Tax rules are simplified. The QBI phase-out at higher incomes (over ~$197K for single filers) is not modeled. Certain SSTB (specified service trade or business) restrictions are not applied.
- State tax rates are effective-rate approximations, not precise marginal calculations. Local/city income taxes are not included.
- FICA for full-time employees (6.2% SS + 1.45% Medicare on wages) is included in the full-time tax calculation.
- This calculator does not account for AMT (Alternative Minimum Tax), capital gains, rental income, or other income sources.
- Tax rates reflect 2025 IRS figures and may change with future legislation.
Please consult a qualified CPA or tax professional for advice specific to your situation.
IRS & Regulatory Sources
- IRS Publication 334 — Tax Guide for Small Business (SE tax calculation methodology)
- Schedule SE (Form 1040) — Self-Employment Tax
- IRS Revenue Procedure 2024-40 — 2025 Tax Inflation Adjustments (brackets, standard deductions)
- IRS Notice 2024-80 — 2025 Retirement Plan Contribution Limits (401(k) limit: $23,500)
- IRC §164(f) — Deduction for one-half of self-employment taxes
- IRC §162(l) — Self-employed health insurance deduction
- IRC §199A — Qualified Business Income deduction (20% QBI)