2026 Side Hustle & 1099 Tax Calculator
Estimate federal SE tax and income tax on your 1099 side hustle income. Enter gross earnings, business deductions, and W-2 wages to get total tax, effective rate, and quarterly estimated payment.
Side hustle income on Form 1099-NEC or 1099-K is subject to two federal taxes: (1) self-employment tax at 15.3% on net earnings × 0.9235 (IRS Schedule SE; SS portion capped at $184,500 per SSA 2026 COLA announcement), and (2) ordinary income tax at your marginal bracket per IRS Rev. Proc. 2025-32 §3.01. Deduct the employer-equivalent half of SE tax above the line (IRC §164(f)); most non-SSTB sole proprietors also qualify for the 20% QBI deduction (IRC §199A, OBBB §70105).
The IRS requires quarterly estimated payments when expected tax exceeds $1,000 (IRC §6654). Safe harbor: 100% of prior-year tax (110% if AGI > $150K) in four installments by April 15, June 16, September 15, and January 15.
Worked example: $40,000 gross, $5,000 expenses. Net profit = $35,000. SE tax = $35,000 × 0.9235 × 15.3% = $4,946. Deductible half = $2,473. At 22% marginal rate, income tax ≈ $7,156. Total federal tax = $12,102. Quarterly payment ≈ $3,026.
How it's calculated
How to use this calculator
- Enter your gross 1099 income and business expenses (net profit drives SE tax).
- Enter your W-2 wages from other jobs so the Social Security wage base is coordinated correctly.
- Select filing status for the correct standard deduction and brackets.
- Results show SE tax, estimated income tax, total federal tax, effective rate, and quarterly payment.
Formula and assumptions
netProfit = grossIncome - businessExpenses netEarningsSE = netProfit × 0.9235 SS_SE_tax = min(netEarningsSE, max(0, 184500 - W2wages)) × 0.124 Medicare_SE_tax = netEarningsSE × 0.029 SE_tax = SS_SE_tax + Medicare_SE_tax deductibleHalf = SE_tax / 2 QBI = min(netProfit - deductibleHalf, taxableIncome) × 0.20 taxableIncome = netProfit - deductibleHalf - QBI - standardDeduction + W2wages quarterlyPayment = totalFederalTax / 4
- SS wage base 2026
- $184,500 per SSA COLA announcement
- Standard deduction 2026
- $15,750 single / $31,500 MFJ per Rev. Proc. 2025-32 §3.04
- QBI
- 20% simplified — SSTB / W-2 high-income limits not modeled
- OBBB
- QBI deduction made permanent per OBBB §70105
Worked example
$50,000 gross 1099, $8,000 expenses, single filer, no W-2 wages
2026 quarterly payment schedule
Using the worked example above ($7,553 total annual federal tax), the quarterly safe-harbor payments and due dates are shown below. This assumes the same amount is owed in 2025 (prior year) and the 100% safe-harbor applies (AGI ≤ $150,000). Per IRS Publication 505 and IRC §6654(d)(1)(B).
| Quarter | Income period | Due date | Payment |
|---|---|---|---|
| Q1 | Jan 1 – Mar 31 | April 15, 2026 | $1,888 |
| Q2 | Apr 1 – May 31 | June 16, 2026 | $1,888 |
| Q3 | Jun 1 – Aug 31 | September 15, 2026 | $1,888 |
| Q4 | Sep 1 – Dec 31 | January 15, 2027 | $1,889 |
Pay using IRS Direct Pay or EFTPS. Underpayment penalty under IRC §6654 applies if you miss quarters and your prior-year safe harbor is not met.
Limitations
- Income tax estimated using marginal brackets only — AMT and NIIT not modeled.
- QBI is 20% flat — SSTB phase-outs and W-2 wage limits for high incomes not applied.
- State income tax not included.
- Educational estimate only — not professional tax advice. Consult a CPA.
Frequently asked questions
Side hustle net profit above $400 triggers SE tax at 15.3% on net earnings × 0.9235 (IRS Schedule SE). Quarterly estimated payments due April 15, June 16, September 15, and January 15. Safe harbor: 100% of prior-year tax (110% if AGI > $150K). Business deductions reduce both SE and income tax.
Recent updates
- May 2026Initial launch. 2026 SS wage base $184,500 per SSA COLA. Brackets per IRS Rev. Proc. 2025-32 §3.01. Standard deduction per §3.04.