Free estimator for freelancers, 1099 contractors, gig workers, and the self-employed. SE tax + federal brackets + state — all in one place.
| Quarter | Income Period | Due Date | Payment |
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The IRS requires estimated tax payments four times per year. Miss a deadline and you'll owe an underpayment penalty (~8% annualized on the shortfall). Mark your calendar:
This estimator follows the exact IRS methodology for Form 1040-ES, applied to 2026 tax rates. Here's what's happening under the hood:
Gross income minus your deductible business expenses = net self-employment income (Schedule C equivalent).
Net income × 92.35% = SE tax base. Then × 15.3% for the full SE tax (SS + Medicare). The 92.35% accounts for the employer-equivalent deduction.
You deduct 50% of your SE tax from your gross income before calculating federal income tax — this is automatic and built into our math.
Applied using 2026 marginal tax brackets after standard deduction ($15,000 single / $30,000 MFJ) and the 50% SE deduction.
Estimated using each state's top marginal rate applied to your taxable income. Highly variable — some states have no income tax at all.
Total annual estimated tax divided by 4. For safe harbor, we compare to 100% (or 110% if high AGI) of your prior year tax.
When you work for yourself — whether as a freelancer, consultant, independent contractor, or sole proprietor — the IRS doesn't automatically withhold taxes from your income the way an employer does. Instead, you're responsible for calculating and remitting your own taxes on a schedule throughout the year. That's exactly what a self-employed quarterly tax calculator is designed to handle.
The calculation involves three layers: self-employment (SE) tax, which covers Social Security and Medicare; federal income tax, applied through the progressive bracket system after deductions; and state income tax, which varies dramatically depending on where you live. Getting all three right — and on time — is what separates freelancers who file cleanly from those who face surprise bills and penalties in April.
Our calculator handles all three automatically using 2026 IRS rates. You enter your gross self-employment income, subtract your business expenses to get net income, select your filing status and state, and the calculator runs the full IRS 1040-ES methodology in seconds. The output is your total estimated annual tax and your per-quarter payment amount — no spreadsheet required.
Any self-employed person who expects to owe $1,000 or more in federal taxes for the year. This includes freelancers, gig workers, consultants, sole proprietors, single-member LLC owners, and S-corp shareholders taking distributions.
SE tax (15.3% on 92.35% of net income), the 50% SE deduction, federal income tax using 2026 brackets, state income tax, and the quarterly payment amount due on each of the four IRS deadlines.
Before each quarterly due date (April 15, June 16, September 15, January 15) and any time your income changes significantly — a new client, a big project, or a slow quarter all affect what you owe.
The most common question freelancers ask is simple: how much should I actually set aside? The answer depends on your net income, filing status, and state — but there are reliable rules of thumb that get most freelancers close without running the full calculation every quarter.
If your net SE income is under $50,000 and you live in a no-income-tax state (Texas, Florida, Nevada, etc.), setting aside 25% of net income generally covers your SE tax and federal income tax with a small buffer.
Net income $50K–$120K in a state with a 4–6% income tax? Aim for 28–32% set aside. SE tax (~14.1% effective) plus a 22% federal bracket plus state adds up fast.
California, New York, Oregon, New Jersey: budget 35–42%. State rates reach 9.3–13.3% on top of federal. At $150K+ net income you're also looking at the 24–32% federal bracket.
These are starting estimates — not guarantees. Your actual liability depends on deductions (home office, mileage, health insurance, retirement contributions) that meaningfully reduce your taxable income. A freelancer earning $80,000 gross who deducts $20,000 in legitimate business expenses has $60,000 net — and pays taxes on $60,000, not $80,000. That difference is worth thousands of dollars per year in reduced quarterly payments.
The most reliable approach: run the calculator above with your actual figures every quarter. Income fluctuates month to month, and recalculating when a major project lands or falls through keeps you accurate and avoids the underpayment penalty (currently ~8% annualized on shortfalls).
Form 1040-ES is the IRS worksheet for calculating and paying estimated taxes. Most self-employed people never actually fill it out on paper — they use a calculator like this one or tax software — but understanding what it computes helps you file with confidence and spot errors before they become penalties.
The 1040-ES calculation for 2026 works in six steps:
The IRS underpayment penalty is one of the most avoidable tax costs self-employed people face — yet it catches thousands of freelancers every year. Here's exactly how it works and how to make sure you never owe it.
The penalty is calculated under IRC §6654 as interest on the amount you should have paid, from the missed due date until you paid it. For 2026, the rate is approximately 8% annualized (the federal short-term rate plus 3 percentage points, updated quarterly). On a $2,000 shortfall across two quarters, that's roughly $80–160 in avoidable penalty — small on its own, but it adds up across multiple tax years.
You avoid the penalty entirely by satisfying one of two safe harbor thresholds — regardless of what your final tax bill turns out to be:
Pay at least 90% of your actual 2026 tax liability through quarterly payments (and any withholding). If you end up owing $10,000, you need to have paid at least $9,000 during the year. This method requires you to accurately estimate your income — it's more precise but requires more work.
Pay an amount equal to 100% of last year's total tax (line 24 of your 2025 Form 1040). If your AGI exceeded $150,000 last year, the threshold rises to 110% of prior year tax. Enter your prior-year tax amount in the calculator above to see your safe harbor quarterly amount automatically.
Most freelancers with variable or growing income prefer Method B — the prior-year safe harbor. You look up one number from last year's return, divide by 4, and you're penalty-proof for the entire year no matter how well (or poorly) business goes. Pay it even if you think you'll owe more; settle the balance when you file in April.
If your income dropped significantly from last year, Method A (90% of this year) typically results in lower quarterly payments. Run both numbers in the calculator, pay whichever is smaller, and you've legally minimized your quarterly obligation without risking a penalty.
Gig economy workers face the same quarterly tax obligations as any self-employed person — but the calculation has some platform-specific nuances that catch new drivers and dashers off guard. Here's what you need to know if your income comes from Uber, Lyft, DoorDash, Instacart, Airbnb, TaskRabbit, Fiverr, or similar platforms.
You receive a 1099-K (if over $5,000 in payments) and/or 1099-NEC. Taxable income is your net earnings after the platform's service fee and your deductible expenses — most importantly mileage ($0.725/mile for 2026). Rideshare drivers often have substantial mileage deductions that significantly cut taxable income.
Same 1099-K / 1099-NEC setup. Mileage is again the biggest deduction — track every mile from the moment you're on-shift. Insulated bags, phone mounts, and a portion of your phone bill are also deductible. Enter your gross 1099 income minus these expenses in the calculator.
Rental income is generally reported on Schedule E (not Schedule C), which means it is not subject to SE tax. However, if you provide substantial services (daily cleaning, meals), it may be treated as self-employment income. Consult a CPA if you're unsure which category applies.
Pure 1099 income, fully subject to SE tax. If you also have a W-2 job, enter that in the "W-2 income" toggle in the calculator above — it affects which federal bracket your freelance income falls into, which can meaningfully change your quarterly payment amount.
One common mistake for gig workers: using gross platform income (before fees) instead of net income (after platform commission). Uber keeps roughly 25–35% of each fare before paying you. Your taxable income starts from what you actually receive — or more precisely, your net income after all deductible business expenses.
If you drive for multiple platforms simultaneously, add the income together. They're all reported on the same Schedule C under the same business category. A freelancer who writes on Upwork and drives for Uber on weekends is one self-employed person with combined 1099 income — calculate the total quarterly payment on the combined net income.
Federal tax is the same for everyone in the same bracket — but state income tax varies so dramatically that two freelancers with identical federal income can have quarterly payments differing by thousands of dollars depending on where they live. Understanding your state's tax rules is essential for accurate quarterly planning.
Nine states have eliminated personal income tax entirely, making them highly attractive for high-earning freelancers: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. If you live and work in one of these states, your quarterly payment is purely federal — SE tax plus federal income tax brackets, nothing more.
The highest top marginal rate in the US. CA also has its own estimated tax schedule — Q1 due April 15, Q2 due June 15, Q3 due September 15, Q4 due January 15. Note: California skips a Q2/Q3 distinction and requires 30% of annual estimate by April, 40% by June. Use the FTB 540-ES worksheet for CA-specific amounts.
NY has a complex progressive rate structure with a millionaire's surcharge. NYC residents also pay an additional city income tax of up to 3.876%, making the combined marginal rate for high earners potentially over 14% state+local. Use NY Form IT-2105 for state estimated payments.
Both states have high top rates that kick in at relatively moderate income levels. Oregon's top rate of 9.9% applies above $125,000 single. NJ's 10.75% applies above $1M. At typical freelance incomes, expect effective state rates of 5–8%.
Illinois (4.95%), Pennsylvania (3.07%), Colorado (4.4%), and Indiana (3%) charge a flat rate on all income regardless of amount — simpler to calculate and generally lower for mid-to-high earners compared to progressive states. Enter your state in the calculator to see the exact impact.
An important note: state estimated tax payments are made separately from federal payments. Federal taxes go to the IRS (via IRS Direct Pay or EFTPS). State taxes go to your state's department of revenue, using a state-specific form and payment portal. Most states mirror the federal due dates (April, June, September, January) but some — notably California and Iowa — use different schedules.
Our calculator gives you a reliable combined estimate for quarterly planning purposes. For the exact state form and payment portal for your state, search "[Your State] estimated tax payments" on your state revenue department's website.
The IRS quarterly tax calendar doesn't follow even three-month intervals — a detail that catches even experienced freelancers off guard. Q2 covers only two months of income (April and May), while Q3 covers three (June, July, August). The payment amounts are still equal quarters of your annual estimate regardless of this asymmetry.
Free, instant bank transfer at irs.gov/payments. No registration required. Schedule payments up to 365 days in advance. Select "Estimated Tax" and tax year "2026" when setting up the payment. Confirmation emailed immediately.
Free at eftps.gov. Requires one-time enrollment (takes 5–7 business days to activate). Lets you schedule recurring quarterly payments, view payment history, and receive email reminders before each due date.
Pay through IRS-approved processors (PayUSAtax, Pay1040, ACI Payments). Debit card fee: ~$2.20 flat. Credit card fee: 1.85–1.98% of the payment amount. Convenient but adds cost — use bank transfer instead when possible.
Make the check payable to "United States Treasury." Write your SSN, "2026 Form 1040-ES," and the tax quarter on the memo line. Mail with a completed 1040-ES payment voucher to the IRS address for your state. Allow 5–7 days for delivery.
Pro tip for variable-income freelancers: set a recurring calendar reminder one week before each due date with a note to run the quarterly tax calculator with your current YTD income. Recalculating each quarter — rather than setting it once in January — prevents both overpaying (locking up cash unnecessarily) and underpaying (triggering the penalty). The five minutes it takes pays for itself immediately.
The QuarterlyTaxEstimator.me mobile app is in development for iOS and Android. Calculate on the go, get push notifications before every IRS deadline, and never miss a quarterly payment again.
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