Side Hustle Tax Calculator (USA)
Calculate self-employment tax, federal income tax, and net income from your side hustle. Estimates SE tax (15.3%), QBI deduction, and quarterly payments for…
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Reviewed by: Martín Rodríguez (editorial policy ) · Last reviewed:
Result
Net Profit (after expenses)
Self-Employment Tax (15.3%)
Federal Income Tax on Side Income
State Income Tax on Side Income
Total Tax Owed
Net Amount You Keep
Effective Total Tax Rate
Estimated Quarterly Payment (Form 1040-ES)
Tax Breakdown Summary
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Illustrative estimate, not accounting or financial advice. Consult a licensed accountant for your case.
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If you earn money on the side — Etsy, Uber, freelance gigs, consulting, OnlyFans, Airbnb — the IRS treats you as a sole proprietor and you owe self-employment (SE) tax of 15.3% on net earnings above $400, layered on top of regular federal income tax and any state income tax. SE tax is the self-employed version of FICA: 12.4% Social Security (capped at the $176,100 wage base for 2026) plus 2.9% Medicare (uncapped, with an extra 0.9% Additional Medicare on earnings above $200k single / $250k MFJ). Because no employer is withholding for you, the CPA rule of thumb is to set aside 25–30% of every gross dollar for federal income tax + SE tax + state, and to send four quarterly estimated payments via Form 1040-ES (due April 15, June 16, September 15, and January 15 of the following year for the 2026 tax year). Miss those deadlines and the IRS charges an underpayment penalty currently running ~8% annualized. The good news: every legitimate Schedule C business deduction (home office, mileage, supplies, software, health insurance) reduces both income tax and SE tax base, and side-hustlers can shelter big chunks of net SE earnings inside a Solo 401(k) or SEP-IRA — up to a combined $72,000 for 2026 ($70,000 in 2025). This calculator quantifies your real after-tax take-home, the SE tax bite, your quarterly payment, and the QBI 20% deduction under §199A so you can plan the year instead of getting surprised in April.
When to use this calculator
- Etsy seller with $45k gross revenue calculating Q2 Form 1040-ES estimated payment after deducting cost of goods, shipping supplies, and Etsy fees on Schedule C
- Freelance copywriter netting $80k SE income deciding between Solo 401(k) (higher contribution ceiling with employee + 25% employer profit-sharing) and SEP-IRA (simpler admin, 25% net SE cap)
- Uber/DoorDash driver comparing the 2025 standard mileage rate (67¢/mile) against actual vehicle expense method (depreciation + gas + insurance + maintenance pro-rated by business use)
- Airbnb host with three short-term rental units evaluating whether average stay under 7 days triggers Schedule C SE tax treatment versus Schedule E passive rental income exempt from SE tax
- W-2 employee with a $25k consulting side gig confirming their W-2 wages already maxed the $176,100 Social Security wage base so only 2.9% Medicare applies to the consulting net profit
- Specified Service Trade or Business (SSTB) — consultant, accountant, financial advisor — testing whether 2026 taxable income stays under the $241,950 single / $483,900 MFJ phase-out to keep the §199A 20% QBI deduction
- Content creator on YouTube/OnlyFans/Substack quantifying home office deduction (simplified $5/sqft up to 300 sqft / $1,500 cap vs. actual expense method) plus phone, internet, and software pro-rated by business use
- Side-business owner at ~$60k net profit modeling an S-Corp election: paying themselves a reasonable W-2 salary and taking the remainder as distribution to legitimately reduce SE tax exposure
2026 Self-Employment Tax & Retirement Key Figures (USA)
| Concept | 2026 Value | Detail |
|---|---|---|
| SE Tax Rate | 15.3% | 12.4% Social Security + 2.9% Medicare on net SE earnings |
| SE Tax Base Multiplier | × 0.9235 | Applied to net profit before calculating SE tax (mirrors employer-side deduction) |
| SE Tax Threshold | $400 net earnings | Minimum net SE income that triggers SE tax obligation |
| Social Security Wage Base | $176,100 | 12.4% SS portion capped at this amount; Medicare (2.9%) is uncapped |
| Additional Medicare Tax | 0.9% | On SE earnings above $200,000 (single) / $250,000 (MFJ) |
| Half of SE Tax Deduction | Above-the-line | Deductible on Schedule 1, Line 15 — reduces AGI but not SE tax base |
| QBI Deduction (§199A) | 20% of qualified business income | Phase-out begins: $241,950 (single) / $483,900 (MFJ) for 2026 |
| Solo 401(k) Employee Deferral Limit | $24,500 (2026) | Up from $23,500 in 2025; Roth option available |
| Solo 401(k) / SEP-IRA Combined Limit | $72,000 (2026) | Employee + employer contributions; $70,000 in 2025 |
| Catch-Up Contribution (age 50+) | $8,000 | Added on top of $72,000 combined limit |
| SEP-IRA Employer Contribution | Up to 25% of net SE earnings | Simpler than Solo 401(k); no annual Form 5500 required |
| SIMPLE IRA Employee Limit | $16,500 (2025) | Generally used when business has employees |
| Home Office — Simplified Method | $5/sq ft, max 300 sq ft ($1,500 cap) | Requires regular and exclusive business use (IRS Pub 587) |
| Business Mileage Rate | 67¢/mile (2024) | IRS sets rate annually; mileage log required |
| Meals Deduction | 50% | Business-related meals; 100% restaurant deduction expired after 2022 |
| Estimated Tax Threshold | $1,000 owed after withholding | Triggers quarterly payment requirement via Form 1040-ES |
| 2026 Quarterly Payment Deadlines | Apr 15 / Jun 16 / Sep 15 / Jan 15, 2027 | Four installments covering the 2026 tax year |
| Safe-Harbor Rule | 90% of current-year tax OR 100% of prior-year tax | 110% of prior-year tax if prior-year AGI > $150,000 |
| Underpayment Penalty Rate | ~8% annualized | Charged by IRS on missed or short quarterly payments |
| CPA Set-Aside Rule of Thumb | 25–30% of gross revenue | Covers federal income tax + SE tax + state tax |
Fuente: Internal Revenue Service — IRS Pub. 334, 560, 587; Schedule SE; Form 1040-ES; IRS 2026 Inflation Adjustments (2026)
How it works
How self-employment tax actually stacks on top of income tax
When a W-2 employee earns a dollar, the employer withholds 7.65% FICA (6.2% Social Security + 1.45% Medicare) and matches another 7.65% silently. A self-employed side-hustler owes both halves — that's the 15.3% SE tax. It is layered on top of federal income tax (and any state income tax), so the marginal hit on the next dollar of side-gig profit is materially higher than the same dollar of W-2 wages.
The SE tax math, worked out on $30,000 net side-hustle profit
Schedule C deductions every CPA reaches for
Every dollar deducted on Schedule C lowers SE tax base, federal income tax base, and (usually) state income tax base — a triple-stack win:
QBI §199A — the 20% deduction that quietly saves thousands
The Qualified Business Income deduction lets eligible pass-through owners (sole props, S-corps, partnerships) deduct up to 20% of qualified business income before federal income tax. 2026 phase-out begins at $241,950 single / $483,900 MFJ (inflation-adjusted from $191,950 / $383,900 for 2024). Below the threshold, almost any side-hustle gets the full 20%. Above it, Specified Service Trades or Businesses (SSTBs) — consulting, health, law, accounting, financial services, performing arts, athletics — phase out fast and lose it entirely once fully phased. Non-SSTB businesses (e-commerce, Etsy, freelance writing, software dev, real-estate flippers) keep QBI subject to W-2 wage and qualified property tests at higher income.
Solo 401(k) vs. SEP-IRA vs. SIMPLE IRA — the tax shelter decision
For 2026 the combined contribution limit (employee + employer) is $72,000 in 2026 ($70,000 in 2025) plus $8,000 catch-up at age 50+:
Contributions reduce federal income tax base but not SE tax base — the IRS taxes the gross net SE earnings before retirement contributions for SS/Medicare purposes.
Quarterly estimated payments — Form 1040-ES
The IRS requires estimated payments if you expect to owe at least $1,000 in federal tax after withholding. The four 2026 deadlines: April 15, June 16, September 15, and January 15, 2027. The safe-harbor rule: pay the lesser of (a) 90% of current-year tax or (b) 100% of prior-year tax (110% if prior-year AGI > $150k). Underpayment penalty rate is currently ~8% annualized. Most state DORs run a parallel quarterly schedule.
State-level wrinkles
States with no income tax (AK, FL, NV, SD, TN, TX, WA, WY) keep things simple. NH taxes only interest/dividends. California self-employed can voluntarily opt into SDI; New York PFL is generally voluntary for self-employed. Most graduated-bracket states (CA, NY, OR, MN, NJ) tax SE income at the same rates as wages, but treatment of QBI varies — some states fully decouple from §199A.
Disclaimer: Los resultados son orientativos y no constituyen asesoramiento profesional. Antes de tomar decisiones con impacto, consultá con un contador público, abogado o asesor matriculado.
Frequently asked questions
How much should I set aside for taxes from my side hustle?
For most side-hustlers in the 22–24% federal bracket, set aside 25–30% of every gross dollar received (before expenses). That covers SE tax (~15.3% of net), federal income tax (10–24% marginal), and a typical state tax (3–7%). Higher earners over $250k AGI should bump to 35–40% to absorb the 0.9% Additional Medicare Tax and possible loss of QBI. The cleanest discipline: open a separate high-yield savings account, sweep 30% of every payout into it immediately, pay 1040-ES from there quarterly.
Am I required to make quarterly estimated tax payments on 1099 income?
Yes if you expect to owe at least $1,000 in federal tax after any W-2 withholding and credits. Form 1040-ES vouchers are due April 15, June 16, September 15, and January 15, 2027 for the 2026 tax year. The safe harbor: pay the lesser of 90% of current-year tax or 100% of prior-year tax (110% if prior-year AGI > $150k). Miss it and the IRS applies an underpayment penalty — currently ~8% annualized — calculated on Form 2210.
Solo 401(k) vs SEP-IRA — which is better for a side hustle?
Solo 401(k) wins for most one-person businesses because the employee elective deferral ($24,500 in 2026, up from $23,500 in 2025) is a fixed dollar amount on top of the 25%-of-net-SE employer profit-sharing — meaning you can max out tax-deferred contributions much faster at modest income. SEP-IRA wins only if you want zero admin: employer-only contribution capped at 25% of net SE earnings, no Form 5500, no plan document. Both share the 2026 combined limit of $72,000 (up from $70,000 in 2025). Solo 401(k) also allows Roth contributions and loans; SEP-IRA does not. Both reduce income tax base but not SE tax base.
Home office deduction — simplified or actual expense method?
Simplified method: $5 per square foot up to 300 sqft, hard cap $1,500. Zero recordkeeping beyond proving the space exists and is used regularly and exclusively for business. Actual expense method: pro-rate mortgage interest (or rent), utilities, insurance, depreciation, repairs by the business-use percentage (business sqft ÷ total home sqft). Usually beats simplified once your home office is 200+ sqft and total home costs are above ~$25k/year — but you must add back depreciation as ordinary income when you sell the home. Either way, IRS Pub 587 requires regular and exclusive business use of an identifiable space.
What is the 2026 standard mileage rate for business use of a vehicle?
The IRS sets the standard mileage rate annually. For 2025 it is 67¢ per business mile (up from 67¢ for 2024); the 2026 rate is typically published in December and historically moves a few cents. Track every business trip with date, miles, and purpose — apps like MileIQ, Stride, or Everlance handle this. Alternatively use the actual expense method: pro-rate gas, insurance, maintenance, depreciation, lease payments by business-use percentage. You cannot switch from actual back to standard mileage on a vehicle you previously depreciated using actual expenses.
Do I qualify for the §199A 20% QBI deduction?
Almost certainly yes if your 2026 taxable income is below $241,950 (single) / $483,900 (MFJ) — the full 20% deduction is available regardless of business type. Above those thresholds, Specified Service Trades or Businesses (SSTBs) — consulting, health, law, accounting, financial services, performing arts, athletics — phase out and lose QBI entirely once fully phased ($291,950 single / $583,900 MFJ approximately). Non-SSTBs (e-commerce, freelance writing, software, real estate development) keep QBI subject to W-2 wage and qualified property tests. QBI is calculated on Form 8995 (simple) or Form 8995-A (above phase-out).
Hobby vs. business — how does the IRS decide and why does it matter?
If the IRS reclassifies your side hustle as a hobby, you cannot deduct expenses against the income (post-2018 TCJA killed miscellaneous hobby deductions), so you pay tax on gross — brutal. The IRS uses a 9-factor test (Treas. Reg. §1.183-2) examining whether you run it businesslike, depend on the income, have expertise, change methods to improve profitability, and so on. The presumption rule: profit in 3 of the last 5 years is presumed a business (2 of 7 for horse breeding). Keep a separate business bank account, written business plan, profit-improvement notes, and a logo/website — these are cheap and bulletproof against hobby reclassification.
Should I elect S-Corporation status to reduce SE tax?
Worth modeling once net SE profit exceeds roughly $50,000/year. An S-Corp pays you a reasonable W-2 salary (subject to FICA) and lets you take the remainder as a distribution — distributions are not subject to SE tax. Example: $100k net profit as a sole prop = ~$14,130 SE tax; same $100k as S-Corp with $60k reasonable salary = ~$9,180 payroll tax, saving ~$4,950/year. Offsets: payroll service ($600–$1,200/year), S-Corp tax return ($800–$2,000), state franchise fees (CA $800/year minimum, NY ~$25–$4,500 graduated). File Form 2553 within 75 days of formation or by March 15 for current-year election.
What happens if I have a W-2 job and a side hustle at the same time?
SE tax is calculated only on your self-employment net profit. But your W-2 Social Security wages count toward the $176,100 (2026) SS wage base. If your W-2 already exceeds $176,100, the 12.4% SS portion of SE tax on your side income is zero — only the 2.9% Medicare portion applies (plus 0.9% Additional Medicare if combined income exceeds $200k single / $250k MFJ). You can also bump W-2 withholding via a new Form W-4 to cover the side-hustle income, avoiding 1040-ES quarterlies entirely — withholding is treated as evenly distributed across the year and bypasses underpayment penalty math.
Is Airbnb / short-term rental income subject to SE tax?
Usually yes if average guest stay is less than 7 days, or less than 30 days when you provide substantial services (cleaning between stays, meals, concierge). Report on Schedule C, owe SE tax 15.3%. Long-term residential rentals (30+ day stays, no substantial services) go on Schedule E as passive rental income, exempt from SE tax. The distinction comes from Treas. Reg. §1.1402(a)-4 and is a frequent IRS audit issue for Airbnb hosts. Real estate professional status (750+ hours, more than half of personal services) can also allow loss deduction against W-2 income, but the bar is high.
What state tax rate do I enter if I live in a no-income-tax state?
Enter 0. No personal income tax states for 2026: Alaska, Florida, Nevada, South Dakota, Tennessee, Texas, Washington, Wyoming. New Hampshire taxes only interest and dividends as of 2025 (the I&D tax fully phases out in 2027). If your state uses graduated brackets (CA, NY, OR, MN, NJ), enter your effective marginal rate at your expected total taxable income for the most accurate estimate. Note: many states do not conform to the federal §199A QBI deduction — verify on your state DOR website.
Sources & references
- IRS Publication 334 — Tax Guide for Small Business (Sole Proprietor) — Internal Revenue Service (2026)
- IRS Publication 535 — Business Expenses — Internal Revenue Service (2026)
- IRS Schedule C — Profit or Loss From Business (Sole Proprietorship) — Internal Revenue Service (2026)
- IRS Schedule SE — Self-Employment Tax — Internal Revenue Service (2026)
- IRS Form 1040-ES — Estimated Tax for Individuals — Internal Revenue Service (2026)
- IRS Publication 587 — Business Use of Your Home (Home Office) — Internal Revenue Service (2026)
- IRS Publication 560 — Retirement Plans for Small Business (SEP, SIMPLE, Solo 401(k)) — Internal Revenue Service (2026)
- IRS Revenue Procedure — 2026 Tax Inflation Adjustments — Internal Revenue Service (2026)
Methodology & trust
Editorial
Calculadora de negocios revisada por el equipo editorial de Hacé Cuentas, contrastada con IRS Publication 334 — Tax Guide for Small Business (Sole Proprietor), según nuestra política editorial y metodología.
Updates
Última revisión: June 20, 2026. Los parámetros se verifican periódicamente con las fuentes citadas.
Privacy
Calculations run 100% in your browser. We do not store or transmit your data.
Limitations
Indicative results. For critical decisions, consult a professional.
📌 How to cite this calculator
Rodríguez, M. (2026). Side Hustle Tax Calculator (USA). Hacé Cuentas. https://hacecuentas.com/side-hustle-tax-savings-calculator
Contenido bajo licencia CC-BY 4.0 — reutilizable citando la fuente con enlace a Hacé Cuentas.