Free Quarterly Tax Calculator — Self-Employed Estimated Tax Payments (2026)

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Quarterly Tax Calculator

Calculate estimated quarterly tax payments for self-employed, 1099, or freelance income — including self-employment tax, federal income tax, and state tax. Sources: IRS Pub. 505, Schedule SE, Form 1040-ES.

SE Tax = Net SE Income × 92.35% × 15.3% | Income Tax = (Gross − SE Deduction − Std Deduction) × Rate | Quarterly = Annual ÷ 4
Self-employed individuals pay both halves of Social Security + Medicare tax (15.3% on the first $176,100, then 2.9% above). You get to deduct half of SE tax from income. This calculator handles all of that automatically using 2026 IRS rates.
💰 Income & Expenses
Total 1099 / freelance revenue
Deductible biz costs (home office, equipment, mileage)
🏠 Filing & Location
Spouse W-2, rental income, etc.

⚠️ Disclaimer: This calculator provides estimates for informational purposes only and does not constitute tax advice. Tax situations vary. Always consult a qualified tax professional or CPA, especially in your first year of self-employment.

Key Takeaways

  • Self-employed individuals must pay quarterly estimated taxes if they expect to owe $1,000+ for the year. Missing deadlines triggers a penalty currently at 8% annualized (2026 rate).
  • Self-employment tax is 15.3% on the first $176,100 of net SE income (2026) — this is Social Security + Medicare tax that W-2 employees split with their employer. You pay both halves.
  • You can deduct half of your SE tax from your gross income — the calculator handles this automatically.
  • The safe harbor method (pay 100% of prior year tax, or 110% if AGI exceeded $150K) is the penalty-proof approach when income is unpredictable.
  • 2026 due dates: Q1 April 15 → Q2 June 16 → Q3 September 15 → Q4 January 15, 2027.

What Are Quarterly Estimated Taxes?

Quarterly estimated taxes are prepayments of federal (and state) income tax made four times per year by individuals who do not have taxes withheld from their income automatically. If you are self-employed, a freelancer, an independent contractor, a gig worker, or a small business owner — or if you earn significant income from sources with no withholding (rentals, investments, alimony) — the IRS requires you to pay taxes as you earn the income, not just at filing time.

The US tax system operates on a “pay-as-you-go” basis. W-2 employees satisfy this requirement automatically through payroll withholding. Self-employed individuals must do this manually by making quarterly estimated payments, or face an underpayment penalty on any shortfall. According to IRS Publication 505, the penalty for underpayment is calculated at the federal short-term rate plus 3 percentage points — currently 8% annualized for 2026.

Our quarterly tax calculator handles three scenarios: fully self-employed individuals with only 1099 income; W-2 employees who also have side income that isn’t being withheld; and the safe harbor method, which guarantees no underpayment penalty regardless of how much your income grows.

Who Must Pay Quarterly Estimated Taxes?

You must make quarterly estimated tax payments if both of the following apply:

  1. You expect to owe at least $1,000 in federal tax after subtracting withholding and credits for the year.
  2. Your withholding and credits will cover less than 90% of your current year tax OR less than 100% of your prior year tax (110% if prior year AGI exceeded $150,000).

Common situations that require quarterly payments:

  • Freelancers and independent contractors — anyone receiving 1099-NEC or 1099-K forms
  • Gig economy workers — rideshare drivers, delivery workers, TaskRabbit, Upwork, Fiverr
  • Small business owners — sole proprietors, single-member LLCs, partnerships
  • W-2 employees with significant side income — consulting, rental properties, investments
  • Early retirees drawing from IRAs or investment accounts without withholding elected
💡 Exception: You do not owe a penalty if your total tax liability for the year is less than $1,000, or if you had zero tax liability last year and were a US citizen or resident for the full year. New businesses in their first year often fall below the threshold — but it is safer to calculate and pay than to assume.

Self-Employment Tax Explained

This is the tax element that surprises almost every new freelancer. When you work as a W-2 employee, you pay 7.65% of your wages for Social Security and Medicare (FICA), and your employer matches that exact amount — so the total FICA rate is 15.3%, but you only see half on your pay stub. When you are self-employed, you pay both halves — the full 15.3%.

SE Tax = Net SE Income × 92.35% × 15.3% (on first $176,100)

SE Tax = Net SE Income × 92.35% × 2.9% (on income above $176,100)

The 92.35% multiplier exists because the IRS allows you to deduct the “employer-equivalent” portion of SE tax (7.65%) from the base before calculating. You also get to deduct half of your total SE tax from your gross income when calculating federal income tax — a significant above-the-line deduction that our calculator applies automatically.

Example: Net SE income of $80,000. SE tax base = $80,000 × 92.35% = $73,880. SE tax = $73,880 × 15.3% = $11,304. SE deduction = $11,304 ÷ 2 = $5,652 off your taxable income.

For 2026, the Social Security wage base is $176,100. Income above that threshold is subject only to the 2.9% Medicare portion (no Social Security). High earners above $200,000 (single) or $250,000 (MFJ) also pay an additional 0.9% Additional Medicare Tax.

How to Calculate Quarterly Taxes for Self-Employed

Calculating your quarterly tax payment for self-employed income involves four steps. Our calculator handles all of this automatically — the steps below explain exactly what it is computing.

Step 1 — Calculate net self-employment income. Start with gross revenue from all self-employment sources, then subtract deductible business expenses (home office, equipment, supplies, mileage, professional fees, health insurance, retirement contributions, etc.). This is your net SE income — the figure SE tax is calculated on.

Step 2 — Calculate self-employment tax. Multiply net SE income by 92.35%, then multiply that result by 15.3% (up to the $176,100 wage base). Half of this SE tax is deductible from your gross income.

Step 3 — Calculate federal income tax. Subtract the SE tax deduction and the standard deduction from your total income (SE income + any other income). Apply the 2026 federal tax brackets to the result. Add SE tax and income tax together to get total federal estimated tax.

Step 4 — Divide by 4 and add state tax. Divide the total federal annual estimate by 4 for each quarterly payment. Add your state’s estimated tax (use net SE income × your state rate as a rough estimate). The result is your quarterly payment amount.

💡 Practical Shortcut: A widely-used rule of thumb for self-employed individuals in the 22–24% federal bracket is to set aside 25–30% of net income for taxes. In high-tax states like California or New York, use 30–35%. Our calculator gives you the precise percentage for your situation, which is always more accurate than the rule of thumb.

Quarterly Tax Due Dates 2026

Quarterly estimated tax payments are due four times per year on the dates established by the IRS. Note that “quarters” for tax purposes are not equal calendar quarters — Q2 covers only April and May (2 months), while Q3 covers June through August (3 months).

Quarter Income Period Due Date 2026 Notes
Q1 Jan 1 – Mar 31 April 15, 2026 Same day as annual tax filing
Q2 Apr 1 – May 31 June 16, 2026 Only 2-month coverage period
Q3 Jun 1 – Aug 31 September 15, 2026 3-month coverage period
Q4 Sep 1 – Dec 31 January 15, 2027 Can skip if you file and pay by Jan 31
⚠️ If a due date falls on a weekend or federal holiday, the payment is due the next business day. Always verify current due dates at IRS.gov before paying, especially if a Q1 date coincides with a tax extension year.

Most states that have income tax also require quarterly estimated payments on a similar schedule. Some states have different due dates — for example, California’s Q1 and Q2 are due April 15 and June 15, but Q3 is due September 15 and Q4 is due January 15. Check your state’s Franchise Tax Board or Department of Revenue for exact dates.

Safe Harbor Method — Penalty-Proof Payments

If your income is unpredictable — a common situation for freelancers and consultants — the safe harbor method is the most reliable way to avoid the underpayment penalty. The rule is straightforward:

  • If your prior-year AGI was $150,000 or less: Pay 100% of your prior year’s total tax in equal quarterly installments.
  • If your prior-year AGI exceeded $150,000: Pay 110% of your prior year’s total tax.

As long as you meet either safe harbor threshold through a combination of withholding and estimated payments, the IRS cannot assess an underpayment penalty — even if you end up owing significant tax at filing. If you have a great year and earn much more than expected, you will owe the difference at filing in April, but you will owe no penalty on top of that.

Safe Harbor Payment = Prior Year Tax × 100% (or 110%) ÷ 4

Subtract any current-year W-2 withholding before dividing

The safe harbor amount comes from line 24 of your prior year Form 1040 (“Total Tax”). Subtract any withholding your W-2 job handles during the current year. Divide the remainder by 4. That is your quarterly safe harbor payment. Use the Safe Harbor tab in our calculator above to get this number instantly.

How Much to Set Aside for Quarterly Taxes

One of the most searched questions by new freelancers is how much to set aside for quarterly taxes. The answer varies by income level, state, filing status, and deductions — but here are practical benchmarks based on 2026 rates:

Net Self-Employment Income Approx. SE Tax Approx. Fed Income Tax (Single) Set-Aside Rate
$20,000 ~$2,826 ~$0 (below std. deduction) ~14%
$40,000 ~$5,652 ~$2,300 ~20%
$60,000 ~$8,478 ~$5,100 ~23%
$80,000 ~$11,304 ~$8,500 ~25%
$100,000 ~$14,130 ~$12,000 ~26%
$150,000 ~$21,195 ~$22,000 ~29%

These estimates are for single filers with no additional income and using only the standard deduction. Married filers generally set aside 3–5 percentage points less due to the higher standard deduction and wider brackets. Add your state tax rate on top of these federal estimates.

💡 Practical System: Open a dedicated savings account for taxes. Every time a client pays you, immediately transfer 25–30% of that payment into the tax account. Pay quarterly from that account. When you file and pay any remaining balance in April, whatever is left in the tax account is your bonus. This system, recommended by IRS Publication 334 and popularized by Mike Michalowicz’s “Profit First,” prevents the March panic of realizing you spent your tax money.

How to Pay Quarterly Estimated Taxes

There are four ways to make quarterly estimated tax payments to the IRS:

  1. IRS Direct Pay — free, immediate, no account required. Go to directpay.irs.gov. Select “Estimated Tax” as the reason and “1040-ES” as the form. You can pay directly from your bank account. No sign-up needed — just your SSN, prior year AGI for identity verification, and payment amount.
  2. IRS Electronic Federal Tax Payment System (EFTPS) — requires registration but allows scheduling payments in advance. Available at eftps.gov. Best for those who want to automate and schedule all four payments at the start of the year.
  3. IRS2Go App — mobile app for Direct Pay payments. Same as the Direct Pay website but on your phone.
  4. Mail a check — payable to “United States Treasury” with your SSN, tax year, and “Form 1040-ES” in the memo line. Mail to the address listed in the 1040-ES instructions for your state.

For state estimated taxes, visit your state’s Department of Revenue website. Most states have a direct online payment portal similar to IRS Direct Pay. California uses Web Pay at ftb.ca.gov. New York uses Online Services at tax.ny.gov.

Tips & Common Mistakes

Common Mistake What to Do Instead
Not paying quarterly at all and waiting until April Pay quarterly even if estimates are rough — any payment reduces the penalty. Use the safe harbor method if unsure of exact income.
Forgetting to include self-employment tax in the calculation SE tax (15.3%) often exceeds income tax for moderate earners. Always calculate both. A $60K net income generates ~$8,500 in SE tax before any income tax.
Not deducting business expenses before calculating SE tax SE tax is calculated on net income (revenue minus expenses). Every deductible expense you miss overstates your SE tax. Track expenses from day one.
Using gross revenue instead of net income for calculations Always use net income (after expenses) for SE tax. Using gross overstates your tax liability and sets aside more than necessary.
Missing the Q2 due date (it is June 16, not July 1) Q2 covers only April–May and is due in June. Set calendar reminders for all four dates at the start of each year. The IRS does not send reminder notices.
Ignoring state estimated taxes Most states with income tax also require quarterly estimates. California, New York, and Oregon penalties for underpayment rival federal. Pay state quarterly alongside federal.

Frequently Asked Questions

How do I calculate quarterly taxes when self-employed?

Calculate your net self-employment income (gross revenue minus business expenses). Multiply by 92.35% to get the SE tax base, then multiply by 15.3% to get SE tax. Subtract half of SE tax from your total income, then apply the standard deduction, and calculate federal income tax on the remainder using 2026 brackets. Add SE tax and income tax, then divide by 4. Add any state estimated tax. That is your quarterly payment. Use our quarterly tax calculator above to do all of this automatically.

How much should I set aside for quarterly taxes?

The standard rule of thumb is 25–30% of net self-employment income for federal taxes in the 22% bracket, or 30–35% in high-tax states. For precise figures, use our calculator above — the result includes a “Set Aside Rate” showing exactly what percentage of each dollar earned you should reserve. Lower earners (under $40K net) may need only 14–20%; higher earners (over $100K) typically need 26–30%+.

What are the quarterly estimated tax due dates for 2026?

The 2026 quarterly estimated tax due dates are: Q1 — April 15, 2026 (January–March income); Q2 — June 16, 2026 (April–May income); Q3 — September 15, 2026 (June–August income); Q4 — January 15, 2027 (September–December income). Note Q2 covers only 2 months and Q3 covers 3 months. If a date falls on a weekend or holiday, it shifts to the next business day.

What happens if I miss a quarterly tax payment?

Missing or underpaying a quarterly estimated tax payment triggers an underpayment penalty. For 2026, the penalty rate is 8% annualized (the federal short-term rate plus 3%). The penalty is calculated per quarter on the amount underpaid — so missing Q1 generates a larger penalty than missing Q4 (more time at the penalty rate). The penalty is assessed automatically on Form 2210 when you file. You can avoid the penalty entirely by using the safe harbor method (100%/110% of prior year tax) or by paying at least 90% of current year tax.

Do I pay quarterly taxes on gross or net income?

You calculate quarterly taxes on your net self-employment income — gross revenue minus allowable business expenses. Using gross income overstates your tax liability. Common deductible expenses include home office, equipment, software, professional services, health insurance premiums, half of SE tax, and retirement contributions (SEP-IRA, Solo 401k). Our calculator has a business expenses field that automatically reduces your taxable base before computing SE tax and income tax.

How do I pay quarterly estimated taxes?

The easiest method is IRS Direct Pay at directpay.irs.gov — free, instant, no registration required. Select “Estimated Tax” and “1040-ES,” enter your SSN and prior-year AGI for identity verification, and pay from your bank account. Alternatively, register for EFTPS (eftps.gov) to schedule all four payments in advance. For state taxes, use your state’s Department of Revenue online payment portal.

What is the self-employment tax rate in 2026?

The self-employment tax rate is 15.3% on the first $176,100 of net SE income in 2026 (12.4% Social Security + 2.9% Medicare). Above the $176,100 Social Security wage base, only the 2.9% Medicare portion applies. High earners above $200,000 (single) or $250,000 (married) also pay an additional 0.9% Additional Medicare Tax. SE tax is calculated on 92.35% of net income (not 100%) because of the employer-half deduction built into the formula.

If this quarterly tax calculator helped you plan your estimated payments, these tools complete your self-employment financial toolkit:

  • Roth IRA Conversion Calculator — self-employed individuals can contribute to a SEP-IRA or Solo 401(k) and convert strategically to reduce future tax burden.
  • Markup Calculator — set your freelance rates high enough to cover taxes and still meet your income goals after quarterly payments.
  • Break-Even Calculator — find the revenue level where your business covers all costs including quarterly tax obligations.
  • Business Valuation Calculator — understand what your self-employment business is worth as it grows.
⚠️ Reminder: This calculator provides estimates only. Tax laws change, deduction rules vary, and individual situations differ significantly. Consult a CPA or enrolled agent for personalized advice — especially if you have significant business deductions, rental income, or investment gains that interact with your self-employment income.