Quarterly Estimated Tax Calculator

Estimate your IRS 1040-ES quarterly tax payments for freelancers and contractors.

Financial Details

Estimated Payment

Per Quarter

$4,875

Net Profit:$80,000
Estimated SE Tax:$11,304
Estimated Income Tax:$8,198
Total Tax Liability:$19,501

Disclaimer: This is a simplified estimation tool. Tax laws change frequently. Always verify with the official IRS guidance on Estimated Taxes or consult a tax professional.

Author / Editor:PenGenie Editorial Team
Review note:Check current official rules before acting
Calculation details

Private Browser-Based Financial Planning

Fast calculator execution with private inputs, clear estimates, and responsive layouts across desktop and mobile.

Browser-based processing

In-Browser Processing

Salary, tax, savings, and career planning values are processed locally wherever possible. No account or saved calculation history is required.

Immediate recalculation

Fast local recalculation

Update inputs and see planning results immediately, without waiting for signups, dashboards, or checkout flows.

Cross-Engine Support

Browser Compatibility

Works across modern desktop and mobile browsers so salary, tax, and savings calculations remain usable on any screen size.

What is a Quarterly Tax Calculator?

This tool estimates the four IRS tax payments required for self-employed individuals and business owners. Because taxes aren't withheld from 1099 checks automatically, you must pre-pay your estimated income and self-employment taxes four times a year.

Who Should Use This Tool?

Freelancers, independent contractors, small business owners, and gig economy workers. If you have significant side income, use this alongside our 1099 freelance tax calculator to avoid massive April tax bills.

Examples

Solo Consultant

Example Input

Expected annual net profit: $100,000. Single filer. No W-2 income.

Sample Output

You will owe approximately $15,300 in self-employment tax plus federal income tax. Your estimated quarterly payment to the IRS will be around $5,500 per quarter.

Side Hustle with a Day Job

Example Input

$80,000 W-2 salary with taxes withheld normally. $20,000 net profit from a side business.

Sample Output

Because your W-2 covers your baseline taxes, the $20,000 is taxed at your marginal bracket plus self-employment tax. Expect to pay roughly $1,500 per quarter for the side hustle.

Actionable Use Cases

Don't get hit with an underpayment penalty. Run this calculator at the end of every quarter (March, June, September, December) to true up your estimates based on your actual net profit. If you are comparing a W-2 offer to a freelance gig, read our freelancer vs employee cost breakdown.

How to Optimize Your Output

Never estimate taxes based on your gross revenue. Always subtract your qualified business deductions (software, home office, mileage) to find your Net Profit, and use that number. Pair this with our business break-even calculator to ensure your pricing models remain profitable post-tax.

Common Pitfalls

The biggest mistake freelancers make is spending their tax money. Always move 25-30% of every client payment into a separate bank account. Understand how self-employment tax (FICA) stacks on top of ordinary brackets by reading our freelancer and employee cost guide.

FAQ

When are quarterly estimated taxes due?

For the IRS, estimated tax payments are typically due on April 15th, June 15th, September 15th, and January 15th of the following year.

What is the penalty for not paying quarterly taxes?

If you owe more than $1,000 when you file your annual return, the IRS applies an underpayment penalty, which is essentially an interest charge on the money you should have paid throughout the year.

Do I have to pay quarterly taxes if I also have a W-2 job?

Not necessarily. If you increase the tax withholding on your W-2 job (using a W-4) enough to cover the taxes owed from your side hustle, you can avoid making separate quarterly payments.

Why Use Our Tool?

Calculations run locally in your browser (compatible with modern versions of Chrome, Safari, Edge, Firefox). The tool does not connect to bank or investment accounts; review the Privacy Policy because standard site services may still make network requests.

Workflow Sequence

Recommended Next Step Workflow

Follow this 3-step planning sequence to compare the current calculator with the next useful financial or career check.

Related Calculators

People Also Calculate

Pair this calculator with related tools to compare salary, tax, savings, and career outcomes.

All Tools →
Financial Planning Guide
Pillar Documentation11 min read1,874 words

Freelancer vs Employee: The True Cost of Going Solo (W-2 vs 1099) (US/UK/Global 2026)

Discover the true financial disparity between W-2 employment and 1099 independent contracting, from self-employment taxes (SECA) and benefit replacement to Solo 401(k) plans and business write-offs.

Read Pillar Guide
Complete Toolkit Collections

Upgrade Your Financial & Career Planning Workflow

Explore our dedicated calculators to systematically plan your career, estimate taxes, and manage your financial growth.