How 1099 Quarterly Estimated Taxes Work
When you work for an employer, tax is withheld from every paycheck and sent to the IRS for you. When you earn 1099 income from apps like DoorDash, Uber, Instacart or Etsy, nothing is withheld, so the IRS expects you to pay as you earn through quarterly estimated payments. Each payment covers a mix of income tax and self-employment tax (15.3% on 92.35% of your net profit). This calculator takes your expected net profit, estimates your 2026 federal and state tax with the 2026 brackets and standard deduction, splits it into four payments, and counts down the days to your next deadline.
Despite the name, the four payment periods are not equal quarters. The first covers January through March, the second only April and May, the third June through August, and the fourth September through December. The due dates follow each period, with the fourth falling in January of the next year.
Do You Have to Pay? The $1,000 Rule
2026 Deadlines and Payment Periods
| Quarter | Income earned | Payment due |
|---|---|---|
| Q1 | Jan 1 – Mar 31 | Wednesday, April 15, 2026 |
| Q2 | Apr 1 – May 31 | Monday, June 15, 2026 |
| Q3 | Jun 1 – Aug 31 | Tuesday, September 15, 2026 |
| Q4 | Sep 1 – Dec 31 | Friday, January 15, 2027 |
Safe Harbor Rules: How to Avoid the Underpayment Penalty
The IRS does not require you to predict your tax perfectly. It gives you "safe harbors": if you pay in at least one of these amounts through estimated payments and withholding, you avoid the underpayment penalty even if your final bill is larger.
| Safe harbor | Pay at least | When it applies |
|---|---|---|
| This year | 90% of this year's tax | The calculator shows 90% of your estimated total |
| Last year | 100% of last year's tax | Prior-year adjusted gross income of $150,000 or less |
| Last year, higher income | 110% of last year's tax | Prior-year adjusted gross income above $150,000 ($75,000 if married filing separately) |
Enter last year's total tax in the calculator to see which safe harbor is lower. The penalty is calculated separately for each quarter, using the IRS underpayment interest rate (which changes every quarter), so paying early in the year matters. You can see how the IRS figures it on Form 2210.
Worked Example: $40,000 of Net Profit
Scenario: a single gig worker in a state with no income tax, $40,000 of net profit and no other income. Last year's total tax was $3,000.
- Self-employment tax: $40,000 × 92.35% × 15.3% = $5,652.
- Federal income tax after half of the SE tax, the $16,100 standard deduction and the 20% QBI deduction: $1,775.
- Total estimated tax: $7,427, or $1,857 per quarter if you cover it in full.
- Safe harbor: 90% of this year's tax is $6,684, but 100% of last year's tax is only $3,000. The smaller amount, $3,000, is enough to avoid the penalty, or $750 per quarter.
Paying only the safe-harbor amount avoids the penalty but leaves a larger balance due in April, so set aside the full amount even if you send less during the year.
When Your Income Is Uneven
Gig income rarely arrives in equal chunks. The simplest habit is to move a fixed percentage of every payout into a separate savings account, using the set-aside percentage shown in your results, and send the saved amount at each deadline. If you earn most of your income late in the year, the annualized income installment method on Form 2210 can reduce early payments. Missed a deadline? Pay as soon as you can, because the penalty keeps accruing until the shortfall is paid.
Related Tools and Guides
Estimate each part of your bill with the Multi-Platform 1099 Tax Calculator, which combines several apps, or the 1099 Gig Tax Calculator. Work out your biggest deduction with the Mileage Deduction Calculator. For the full picture of self-employment tax, deductions and filing, read our Complete Gig Worker Tax Guide for 2026.
Frequently Asked Questions
Most self-employed people, including gig workers and 1099 contractors, who expect to owe at least $1,000 in federal tax for the year after subtracting withholding and refundable credits. If you also have a W-2 job, you can sometimes cover your gig tax by raising your withholding with a new Form W-4 instead of making separate payments.
You generally avoid the underpayment penalty if your payments and withholding for the year add up to at least 90% of this year's tax or 100% of last year's tax, whichever is smaller. The prior-year figure rises to 110% if your adjusted gross income last year was above $150,000 ($75,000 if married filing separately). The prior-year option is often the easiest, because the number is already known.
The four deadlines for the 2026 tax year are Wednesday, April 15, 2026, Monday, June 15, 2026, Tuesday, September 15, 2026, Friday, January 15 and 2027. When a date falls on a weekend or legal holiday, the deadline moves to the next business day. The calculator above shows a live countdown to the next one.
No. Equal payments are the simplest approach, but the IRS looks at whether enough tax was paid by each deadline. If your income is lumpy, you can use the annualized income installment method on Form 2210 (Schedule AI) to base each payment on what you actually earned so far, which can lower early-quarter payments.
The IRS can charge an underpayment penalty, which works like interest on the shortfall from the due date until you pay. The rate is tied to the IRS underpayment interest rate, which changes every quarter. Pay as soon as you can to stop the penalty growing. If you file your return by January 31 and pay the full balance with it, the IRS generally does not charge a penalty for a missed fourth-quarter payment.
You can pay through IRS Direct Pay from a bank account, from your IRS online account, with EFTPS, with a debit or credit card through an IRS-approved processor (fees apply), or by mailing a check with a Form 1040-ES voucher. Many states also require separate estimated payments, so check your state tax agency.
Disclaimer: this calculator provides estimates for educational purposes only and is not financial, tax or legal advice. Consult a qualified professional before making financial decisions.