Estimated Quarterly Taxes 2026 — How to Calculate and Pay

Estimated quarterly taxes are prepayments of your income and self-employment tax made four times per year. If you’re self-employed, freelance, or have significant investment income, you must make these payments to avoid an underpayment penalty at filing. In 2026, quarterly due dates are April 15, June 15, September 15, and January 15, 2027.

Quick answer: Calculate quarterly tax by estimating your full-year tax liability and paying 25% each quarter. The easiest approach: pay 25% of last year’s total tax bill each quarter (safe harbor method) — you’ll avoid the underpayment penalty no matter what you owe this year. Pay via IRS Direct Pay (free) at IRS.gov.

2026 Quarterly Tax Due Dates

Note: Q1 covers 3 months; Q2 covers only 2 months. These don’t align perfectly with calendar quarters, which trips up many first-time quarterly payers. None of the 2026 due dates fall on a weekend, so no dates shift this year.

Who Must Pay Estimated Taxes

You owe estimated taxes if:

• You expect to owe $1,000+ in federal tax this year, AND
• Your withholding covers less than:
  • 90% of this year’s estimated tax liability, OR
  • 100% of last year’s tax (110% if prior year AGI was over $150,000)

Common situations requiring estimated payments:

• Self-employed / freelancer / consultant (1099 income)
• Gig economy worker (Uber, DoorDash, Upwork)
• Business owner (sole proprietor, LLC, S-corp owner)
• Investor with dividends, capital gains, or rental income
• Retiree with pension, 401(k) distributions, or Social Security not covered by withholding

How to Calculate Your Quarterly Estimated Tax Payment

Method 1: Safe Harbor (Simplest — Avoids Penalty)

Step 1: Find last year’s total tax owed (Form 1040, Line 24)

Step 2:

• If last year’s AGI was $150,000 or less: pay 100% of last year’s tax ÷ 4 per quarter
• If last year’s AGI was over $150,000: pay 110% of last year’s tax ÷ 4 per quarter

Example: Last year’s total tax = $8,000; AGI was $100,000 (under $150K threshold)

• Quarterly payment = $8,000 ÷ 4 = $2,000 per quarter

This method guarantees you avoid the underpayment penalty even if you earn much more this year.

Method 2: Current Year Estimate (More Accurate)

Step 1: Estimate net self-employment income

• Gross freelance/self-employment income
• Minus business expenses (home office, equipment, software, mileage, etc.)
• = Net self-employment income

Step 2: Calculate self-employment tax

• Net SE income × 92.35% (you can exclude the employer-equivalent portion) × 15.3% = SE tax (Social Security portion capped at the $184,500 wage base for 2026)
• You can deduct half of SE tax from gross income

Step 3: Calculate income tax

• Gross income + SE income – SE tax deduction (half) – standard or itemized deductions – QBI deduction (if applicable)
• = Taxable income → apply 2026 tax brackets

Step 4: Add SE tax to income tax, subtract any withholding (from W-2 job)

• Total estimated tax − withholding = amount to pay quarterly
• Divide by 4 for quarterly payments

Worked Example — Freelancer earning $60,000 in 2026:

• Gross freelance income: $60,000
• Business expenses: -$8,000
• Net SE income: $52,000
• SE tax: $52,000 × 0.9235 × 15.3% = $7,347
• SE tax deduction (½): -$3,674
• Standard deduction (single, 2026): -$16,100
• Taxable income: $52,000 − $3,674 − $16,100 = $32,226
• Income tax on $32,226: ~$3,614 (12% bracket)
• Total tax: $3,614 + $7,347 = $10,961
• Quarterly payment: $10,961 ÷ 4 = $2,740 per quarter

Assumes single filer, standard deduction only, 2026 federal tax brackets. Actual liability varies with credits, state taxes, and other income.

How to Pay Estimated Taxes

IRS Direct Pay (free — recommended):

1. Go to IRS.gov/directpay
2. Select “Estimated Tax” as the payment type
3. Select tax year 2026
4. Enter your Social Security Number and bank account information
5. Submit payment — confirmation number provided immediately

IRS EFTPS (Electronic Federal Tax Payment System):

• Free enrollment at EFTPS.gov
• Useful for scheduling payments in advance or if you pay frequently

Check (by mail):

• Make payable to “United States Treasury”
• Include Form 1040-ES payment voucher
• Mail to the IRS address for your state

Credit or debit card (via IRS-approved processors):

• Available through PayUSAtax, Pay1040, or ACI Payments
• Processing fees generally run under 2% — confirm current fees at irs.gov/payments before paying, and only use this method if you’re earning card rewards that exceed the fee

Quarterly Tax Calculator — Self-Employed Income

Estimates based on single filer with the 2026 standard deduction ($16,100) only. Actual amounts vary with credits, state taxes, and other income.

Underpayment Penalty — What It Costs

If you underpay estimated taxes, the IRS calculates the underpayment penalty per quarter:

Penalty = Underpaid Amount × (IRS Rate ÷ 4)

At the current 7% annualized individual rate (Q3 2026 — this rate resets quarterly, so confirm the current figure), the quarterly penalty is roughly 1.75% of the underpaid amount. On $5,000 underpaid for one quarter: $5,000 × 1.75% = $87.50 penalty.

The penalty is calculated quarterly — you can’t erase Q1’s penalty by overpaying Q3.

How to avoid penalty:

1. Use the safe harbor method (pay 100%/110% of last year’s tax)
2. Adjust W-4 withholding at a W-2 job to cover shortfall
3. Make large estimated payment in Q4 to catch up — doesn’t eliminate prior quarter penalty but limits full-year exposure

State Estimated Taxes

Most states with income tax require estimated quarterly payments on the same schedule as the IRS. Check your state’s department of revenue for rates, thresholds, and payment methods. California, New York, Texas (no income tax), and other major states have their own estimated tax rules.

Related Guides

• Tax Deadline 2026
• How to Fill Out Form W-4
• What Is a 1099 Tax Form?
• California State Tax 2026
• Gift Tax Rate 2026

Written by WealthVieu

WealthVieu researches and writes data-driven personal finance guides using primary sources including the IRS, Bureau of Labor Statistics, Federal Reserve, and Census Bureau.