Track multiple income streams (gig economy, freelance, 1099, part-time), compute profitability per hour, estimate self-employment tax, and plan toward a target monthly income.
Four tabs: multi-income tracker (up to 10 streams across hourly, monthly, and one-off projects); profitability per hour with expense deductions; self-employment tax (US 15.3% FICA on net SE income above $400); and goal planner with hours/rate calculator.
Disclaimer: Generic estimate — actual tax depends on filing status, total household income, deductions, and state. Consult a CPA for accurate quarterly estimated tax payments.
Calculator information
📋 How to use this calculator
- Open the Multi-Income Tracker tab, then enter up to 10 income streams with monthly amounts ($) and hours worked per month for each stream.
- Open the Profitability per Hour tab: enter gross income, operating costs (transportation, internet, 10-30% platform fees), and total hours including admin/marketing.
- Open the Taxes tab: choose the simplified self-employed scheme (Schedule C with standard deductions) or full Schedule SE plus federal/state income tax brackets.
- For US-based freelancers, the self-employment tax toggle is on by default (15.3% SECA: 12.4% Social Security + 2.9% Medicare) plus federal income tax brackets.
- Open the Goal Planner tab: enter your income target, the gap with actuals, and the calculator will recommend how many additional hours or what new rate per stream is needed.
- Tip: Flag any stream whose profit per hour falls below your local minimum wage (e.g., the federal $7.25/hr or your state minimum) as a candidate to drop or reprice.
🧮 Side Hustle Profitability and Self-Employment Tax
Profit_per_hour = (Gross_income - Costs - Taxes) / Total_hours; SE_Tax = 15.3% x 92.35% x Net_earnings
- Gross_income: total fees before platform deductions ($/month)
- Costs: platform fees + transport + tools + internet ($/month)
- SE_Tax: 15.3% on 92.35% of net self-employment earnings (IRS Schedule SE)
- Total_hours: execution hours + admin hours + marketing hours per month
- Federal income tax: applied progressively on top of SE tax using IRS brackets
Half of SE tax is deductible from adjusted gross income (above-the-line). Most self-employed taxpayers must also pay quarterly estimated taxes (Form 1040-ES) to avoid underpayment penalties.
💡 Worked example: Freelance graphic designer with 3 income streams
Given:- Stream A (retainer client): $5,000/month, 40 hours
- Stream B (Fiverr): $2,200/month, 25 hours, 20% platform fee
- Stream C (digital templates): $900/month, 5 hours
- Tool costs (Adobe, Canva Pro): $60/month
- Status: sole proprietor, annual revenue ~$97,000
Steps:- Total gross income: 5,000 + 2,200 + 900 = $8,100/month
- Fiverr fee 20% x 2,200 = $440
- Total operating costs: 440 + 60 = $500/month
- Net self-employment earnings: 8,100 - 500 = $7,600/month = $91,200/year
- SE tax: 15.3% x 92.35% x 91,200 = $12,886/year ~ $1,074/month
- Approximate federal income tax (22% marginal bracket, after standard deduction and half-SE deduction): ~$1,100/month
- Take-home: 8,100 - 500 - 1,074 - 1,100 = $5,426/month
- Total hours: 70/month. Profit per hour: 5,426 / 70 = $77.51/hour
Result: Take-home ~$5,400/month with a profit of about $77/hour (well above the typical US freelance designer rate of $40-65/hour).
❓ Frequently asked questions
Do freelancers have to pay taxes in the US?
Yes. Anyone with net self-employment earnings of $400 or more in a year must file Schedule SE and pay self-employment tax (Social Security + Medicare). Gross income above the standard deduction also requires federal income tax filing on Form 1040 with Schedule C. Most freelancers must also pay quarterly estimated taxes (Form 1040-ES) on April 15, June 15, September 15, and January 15 to avoid IRS underpayment penalties. State income tax rules vary by state.
How do I calculate self-employment tax?
The Self-Employment Contributions Act (SECA) imposes 15.3% on 92.35% of net earnings, made up of Social Security 12.4% (capped at $168,600 in 2024, $176,100 in 2025) and Medicare 2.9% (no cap, plus 0.9% Additional Medicare above $200K single / $250K joint). Half of SE tax is deductible from adjusted gross income. If you work with international clients, tax treaties between the US and the client's country can let you credit taxes paid abroad to avoid double taxation.
What hourly profit is healthy for a side hustle?
Rule of thumb: side hustle profit per hour should be at least 1.5-2x your local minimum wage. With the federal minimum at $7.25/hr (and state minimums ranging from $7.25 in many states up to $16-17 in California, Washington, and NYC), a side hustle should ideally clear $25-50/hour because you carry the tax burden, tools, and no employer benefits. Streams below that should be dropped, repriced, or automated.
What is the difference between gross income, net income, and take-home?
Gross income is the total fee before any deductions. Net income is gross minus operating costs (tools, transport, platform fees). Take-home is net income minus taxes. For US freelancers, take-home is typically 55-70% of gross because platform fees run 10-30% and combined federal SE + income + state taxes can reach 30-40%. Track all three numbers to evaluate true profitability.
Do I need to form an LLC or S-Corp as a freelancer?
Not required, but it can be beneficial above certain income levels. A single-member LLC offers liability protection and pass-through taxation without changing your federal return much. An S-Corp election can save on SE tax once net earnings exceed roughly $50,000-$80,000 by splitting income between salary (subject to FICA) and distributions (not), though it adds payroll and bookkeeping overhead. Below that threshold most freelancers are better off as sole proprietors to avoid administrative burden. Consult a CPA before electing S-Corp status.
📚 Sources & references
Last updated: May 11, 2026