Quarterly Estimated Tax Calculator for Self-Employed (2026)

Last updated: 2026-03-28

If you're self-employed, a freelancer, or a small business owner, you likely need to make quarterly estimated tax payments to the IRS. This calculator estimates your total annual tax liability — including self-employment tax, federal income tax, and state income tax — then divides it into four equal quarterly payments with exact 2026 due dates.

2026 Quarterly Estimated Tax Calculator

Estimate your quarterly self-employment tax payments including federal income tax, SE tax, and state tax.

Filing Status

State

Self-Employment Income (net, after expenses)

Other Income (W-2 wages, etc.)

Tax Withholding Already Applied (from W-2 jobs)

This calculator provides estimates only using 2026 federal tax brackets, the $184,500 Social Security wage base, and simplified flat-rate state tax approximations. It does not account for itemized deductions, credits, AMT, or the full complexity of the QBI deduction. State tax estimates are approximate — actual rates vary by income level. Consult a qualified CPA or tax advisor for advice specific to your situation.

How to Use This Calculator

Select your filing status— Single, Married Filing Jointly, Married Filing Separately, or Head of Household.
Choose your state— this determines your estimated state income tax rate.
Enter your expected net self-employment income for the full year (gross revenue minus business expenses).
Add any other income— W-2 wages, interest, dividends, or other taxable income (optional).
Enter withholding already applied— tax withheld from W-2 paychecks or other sources (optional).
Click "Calculate Quarterly Taxes" to see your full breakdown and payment schedule.

Who Needs to Pay Quarterly Estimated Taxes?

The IRS requires you to pay estimated taxes if you expect to owe $1,000 or morewhen you file your return and your withholding and credits won't cover at least 90% of your current-year tax or 100% of your prior-year tax (110% if AGI exceeded $150,000). This typically applies to:

•Sole proprietors and freelancers who report income on Schedule C
•Independent contractors who receive 1099-NEC forms
•LLC members in single-member or multi-member LLCs taxed as pass-through entities
•S-Corp shareholders on their distributive share of income
•Partners in partnerships for their share of partnership income
•Gig economy workers(Uber, DoorDash, Etsy sellers, etc.) who don't have taxes withheld

2026 Quarterly Estimated Tax Due Dates

Quarter	Income Earned	Due Date	Form
Q1	Jan 1 – Mar 31	April 15, 2026	1040-ES
Q2	Apr 1 – May 31	June 16, 2026	1040-ES
Q3	Jun 1 – Aug 31	September 15, 2026	1040-ES
Q4	Sep 1 – Dec 31	January 15, 2027	1040-ES

Penalty for missing a deadline:The IRS charges an underpayment penalty (essentially interest) on the unpaid amount for each day it's late. The rate is the federal short-term rate + 3 percentage points, adjusted quarterly. Pay as soon as possible after a missed deadline to minimize penalties.

How to Calculate Your Estimated Taxes

This calculator uses the following methodology to estimate your quarterly tax payments:

Self-employment tax: Multiply net SE income by 92.35% (the taxable portion). Apply 12.4% Social Security tax on the first $184,500, 2.9% Medicare tax on all earnings, and 0.9% additional Medicare tax on combined income above the filing status threshold.
Employer-equivalent deduction:Deduct half of your SE tax (the "employer half") from gross income when calculating AGI — this mirrors how W-2 employees don't pay tax on the employer's share of FICA.
QBI deduction: Apply a simplified 20% Qualified Business Income deduction on eligible self-employment income (subject to limitations at higher income levels).
Federal income tax: After subtracting the standard deduction and QBI deduction from AGI, apply the 2026 marginal tax brackets (10% through 37%) to your taxable income.
State income tax:Apply your state's approximate effective tax rate to your taxable income. Nine states have no income tax.
Quarterly payment: Sum all taxes, subtract any withholding already applied, and divide by four.

Safe Harbor Rules Explained

The IRS won't charge an underpayment penalty if you meet one of these "safe harbor" thresholds:

100% of prior-year tax:Pay at least 100% of last year's total tax liability, divided into four equal quarterly payments. This is the simplest method — you won't be penalized even if you owe more when you file.

110% rule for high earners: If your prior-year AGI exceeded $150,000 ($75,000 if married filing separately), you must pay at least 110%of last year's tax to qualify for the safe harbor.

90% of current-year tax:Alternatively, if your estimated payments cover at least 90% of the tax you actually owe for 2026, you're safe from penalties regardless of last year's amount.

Tip:If your income varies significantly year to year, the prior-year safe harbor method is often the safest choice — especially the 100%/110% rule — because it's based on a known number rather than an estimate.

How to Pay Estimated Taxes

The IRS offers several ways to make quarterly estimated tax payments:

1.IRS Direct Pay — Free bank transfer directly from your checking or savings account. Select "Estimated Tax" and "1040-ES" as the payment type. Confirmation is immediate.

2.EFTPS (Electronic Federal Tax Payment System) — Free government payment system. Requires enrollment (allow 5–7 business days). Ideal if you make regular quarterly payments and want to schedule them in advance.

3.IRS2Go Mobile App— The official IRS mobile app lets you make payments via Direct Pay or credit/debit card from your phone.

4.Credit or debit card— Pay through IRS-approved processors (fees apply: ~1.85–1.98% for credit cards, ~$2.20 flat for debit cards).

5.Mail a check— Send a check or money order with a Form 1040-ES payment voucher to the IRS address for your state.

For state estimated taxes:Most states have their own online payment portals. Search "[your state] estimated tax payment" to find your state's Department of Revenue payment page.

Frequently Asked Questions

Who needs to pay quarterly estimated taxes?

You must pay quarterly estimated taxes if you expect to owe $1,000 or more in federal taxes for the year and your withholding (from W-2 jobs or other sources) won't cover at least 90% of your current-year liability or 100% of your prior-year tax. This includes sole proprietors, freelancers, independent contractors, LLC members, and S-Corp shareholders.

What are the 2026 quarterly estimated tax due dates?

For the 2026 tax year, quarterly payments are due: Q1 on April 15, 2026; Q2 on June 16, 2026; Q3 on September 15, 2026; and Q4 on January 15, 2027. If a due date falls on a weekend or holiday, the deadline moves to the next business day.

What is the safe harbor rule for estimated taxes?

The safe harbor rule protects you from underpayment penalties if you pay at least 100% of your prior-year tax liability (divided into four equal quarterly payments). If your AGI exceeded $150,000 ($75,000 if married filing separately), you must pay 110% of your prior-year liability. Alternatively, paying 90% of your current-year liability also satisfies the safe harbor.

What happens if I miss a quarterly estimated tax payment?

The IRS charges an underpayment penalty calculated on Form 2210. The penalty is essentially interest on the underpaid amount for the period it was late. As of 2026, the underpayment interest rate is set quarterly by the IRS based on the federal short-term rate plus 3 percentage points. You can minimize penalties by paying as soon as possible after a missed deadline.

How do I calculate self-employment tax?

Self-employment tax is calculated on 92.35% of your net self-employment income. You pay 12.4% for Social Security (on income up to $184,500 in 2026) and 2.9% for Medicare (no cap). If your combined self-employment and other income exceeds $200,000 ($250,000 MFJ), you also owe an additional 0.9% Medicare surtax. Half of your SE tax is deductible when calculating your adjusted gross income.

Can I pay estimated taxes through my W-2 job withholding instead?

Yes. If you have a W-2 job alongside self-employment income, you can increase your W-2 withholding by filing a new Form W-4 with your employer. Increased withholding is treated as if paid evenly throughout the year, which can help you avoid underpayment penalties even if you adjust mid-year. Many self-employed people with W-2 jobs use this strategy instead of making quarterly voucher payments.

What is the Qualified Business Income (QBI) deduction?

The QBI deduction allows eligible self-employed individuals and small business owners to deduct up to 20% of their qualified business income from their taxable income. It applies to pass-through entities (sole proprietorships, partnerships, S-Corps, LLCs). The deduction phases out at higher income levels ($191,950 for single filers, $383,900 for MFJ in 2026) for specified service trades or businesses.

How do I pay my quarterly estimated taxes to the IRS?

You can pay quarterly estimated taxes through several methods: (1) IRS Direct Pay at irs.gov/payments for free bank transfers; (2) Electronic Federal Tax Payment System (EFTPS) at eftps.gov; (3) IRS2Go mobile app; (4) Credit or debit card through approved processors (fees apply); or (5) Mail a check with Form 1040-ES voucher to the IRS. Direct Pay and EFTPS are the most popular free options.

Do I need to pay state estimated taxes too?

If you live in a state with income tax, you likely need to make separate quarterly estimated tax payments to your state. Nine states have no income tax on wages: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. Each state has its own payment schedule, forms, and thresholds — check your state's Department of Revenue website for details.