Quarterly Tax Estimator
Estimate your quarterly estimated tax payments as a freelancer or self-employed professional. Includes federal income tax, self-employment tax, and deductions.
How Quarterly Estimated Taxes Work
Self-employed individuals, freelancers, and independent contractors must pay estimated taxes quarterly because they do not have an employer withholding taxes from their paycheck. The IRS requires you to pay estimated taxes if you expect to owe $1,000 or more when you file your return. Quarterly payments cover both income tax and self-employment tax (Social Security and Medicare). The four quarterly due dates are April 15, June 15, September 15, and January 15 of the following year. Missing these deadlines can result in underpayment penalties, so it is important to calculate and pay on time.
Self-Employment Tax Explained
Self-employment tax covers Social Security (12.4%) and Medicare (2.9%) contributions. As an employee, you only pay half — your employer pays the other half. When self-employed, you pay both halves for a combined rate of 15.3%. However, you can deduct the employer-equivalent portion (7.65%) from your adjusted gross income, which reduces your income tax. Self-employment tax applies to 92.35% of your net self-employment earnings. For 2026, the Social Security tax applies to the first $184,500 in earnings (SSA contribution and benefit base), while the Medicare tax applies to all earnings with an additional 0.9% surtax on income above $200,000 for single filers.
Deductions That Reduce Your Quarterly Payments
Common self-employment deductions include home office expenses, health insurance premiums, business equipment, software subscriptions, vehicle expenses, professional development, and retirement contributions to a SEP-IRA or Solo 401(k). The qualified business income (QBI) deduction allows many self-employed individuals to deduct up to 20% of their qualified business income. Track every business expense throughout the year — even small deductions add up to significant tax savings. Using a separate business bank account and accounting software makes tracking expenses much easier when quarterly payment time arrives.
Getting the Most from This Tool
Start by exploring the default settings to understand what the tool offers, then customize the inputs to match your specific needs. Use the results as a starting point for deeper analysis or decision-making. Bookmark this page for quick access in the future. All processing happens in your browser, so your data stays private and the tool works even without an internet connection after the initial page load.
Quarterly Tax Estimator — 2026 IRS Safe Harbor Rules and Deadlines
For the 2026 tax year, the IRS safe harbor rule remains: pay 100% of last year's total tax (110% if your prior-year AGI was above $150,000, or $75,000 if married filing separately) in four equal quarterly installments and you cannot be assessed an underpayment penalty regardless of what you owe when you file. The 2026 Social Security wage base rose to $184,500 (from $176,100 in 2025) per the Social Security Administration contribution and benefit base, so the 12.4% Social Security portion of self-employment tax caps out about $1,042 higher this year. The 2026 quarterly due dates are April 15, June 15, September 15, and January 15, 2027 — all four fall on weekdays this year, so none shift to the next business day. Use IRS Form 1040-ES voucher or pay through IRS Direct Pay free of fees. Enter last year's total tax into the estimator, then divide by four for the exact safe harbor payment — no need to guess this year's income. Updated 2026-07-31.
How Much of Each Invoice to Set Aside for Quarterly Estimated Taxes
A common freelancer rule of thumb is to set aside 25-30% of every invoice into a separate savings account the moment it clears. That range covers the 15.3% self-employment tax plus a typical 10-15% effective federal income tax rate for solo earners in the $40K-$120K bracket — reasonable for the 2026 tax brackets confirmed by IRS Rev. Proc. 2025-32. High earners above $200,000 should bump the set-aside to 35% to cover the 0.9% Additional Medicare Tax and the higher 32-37% federal brackets. Below $40K net, 20% is usually sufficient because the standard deduction and QBI deduction eat most of your income tax. Run this quarterly tax estimator once you know your target annual income, then divide the "Total Annual Tax" figure by your gross invoice total to get your personal exact set-aside percentage — the rule of thumb is a starting point, this tool is the precise answer.
Frequently Asked Questions
Who needs to pay quarterly estimated taxes?
Anyone who expects to owe $1,000 or more in taxes and does not have sufficient withholding — typically freelancers, independent contractors, sole proprietors, and self-employed individuals.
When are quarterly taxes due?
Q1: April 15, Q2: June 15, Q3: September 15, Q4: January 15 of the following year. If the date falls on a weekend or holiday, the deadline moves to the next business day.
What is the self-employment tax rate?
The self-employment tax rate is 15.3% (12.4% Social Security + 2.9% Medicare) on 92.35% of net self-employment earnings. You can deduct the employer-equivalent half from your income.
What happens if I underpay quarterly taxes?
The IRS may charge an underpayment penalty. To avoid penalties, pay at least 90% of current year tax or 100% of prior year tax (110% if AGI exceeds $150,000).
Can I pay all my estimated taxes at once?
Yes, you can pay more than the quarterly amount in any period. Many freelancers pay larger amounts in quarters when they earn more. The IRS does not penalize overpayment.
What is the safe harbor rule?
Paying 100% of last year's tax liability (110% if AGI over $150,000) in equal quarterly installments avoids underpayment penalties regardless of how much you owe this year.
What is the 2026 Social Security wage base for self-employment tax?
The 2026 Social Security wage base rose to $184,500 (up from $176,100 in 2025) per the Social Security Administration contribution and benefit base. This means the 12.4% Social Security portion of the 15.3% self-employment tax now applies to the first $184,500 of net self-employment earnings — $8,400 more earnings covered than last year, about $1,042 in extra tax at the cap. Medicare tax (2.9%, plus 0.9% surtax above $200,000 single / $250,000 MFJ) still applies to all earnings with no cap.
When are 2026 quarterly estimated tax payments due?
The four 2026 IRS quarterly deadlines are April 15, 2026 (Q1), June 15, 2026 (Q2), September 15, 2026 (Q3), and January 15, 2027 (Q4). Pay through IRS Direct Pay (free) at irs.gov/payments, mail Form 1040-ES vouchers, or use EFTPS. Missing a deadline triggers an underpayment penalty calculated as an interest rate on the shortfall for the number of days late.
What percentage of my freelance income should I set aside for quarterly taxes?
A typical guideline is 25-30% of every invoice, saved into a separate account the moment payment clears. That covers 15.3% self-employment tax plus 10-15% effective federal income tax for solo earners between $40K and $120K. Below $40K, 20% is usually enough; above $200K, use 35% to cover the 0.9% Additional Medicare Tax and higher 32-37% brackets. Run this estimator once with your target annual income to lock in your exact set-aside rate.
Should I pay quarterly estimated taxes via IRS Direct Pay, EFTPS, or Form 1040-ES vouchers?
IRS Direct Pay (irs.gov/payments) is the fastest and free — bank draft only, no card fees, immediate confirmation email. EFTPS is better if you also pay employment taxes for a business (single dashboard). Paper Form 1040-ES vouchers with a check work but risk mail delays; the IRS credits the postmark date but underpayment penalty runs on receipt, so mail 7-10 days before the deadline. Never pay by credit card — the 1.85%+ processor fee outweighs any rewards.