Quarterly Tax Calculator for Freelancers: 2026 Payment Guide

Quick Answer

Pay 25-30% of your net freelance income in quarterly estimated taxes by April 15, June 15, September 15, and January 15. Use the safe harbor rule: pay 100% of last year’s tax liability (110% if AGI > $150K) to avoid penalties.

Key Takeaways

  1. 4 payments per year: April 15, June 15, Sept 15, Jan 15
  2. Safe harbor: 100% of prior year tax (110% if high income)
  3. Set aside 25-30%: Cover income tax + self-employment tax
  4. Penalty is ~8%: IRS interest on underpaid amounts
  5. Use IRS Direct Pay: Free, instant, confirmation receipt

2026 Quarterly Tax Deadlines

QuarterPeriod CoveredDue Date
Q1Jan 1 - Mar 31April 15, 2026
Q2Apr 1 - May 31June 15, 2026
Q3Jun 1 - Aug 31September 15, 2026
Q4Sep 1 - Dec 31January 15, 2027

How to Calculate Quarterly Payments

Method 1: Safe Harbor (Easiest)

Quarterly Payment = Last Year's Total Tax ÷ 4

Example:
- 2025 total tax: $20,000
- Quarterly payment: $5,000

Method 2: Annualized Income (More Accurate)

Quarterly Payment = (Year-to-Date Income × Estimated Tax Rate) - Previous Payments

Example (Q2):
- YTD income: $50,000
- Tax rate: 25%
- Q1 payment: $3,000
- Q2 payment: ($50,000 × 0.25) - $3,000 = $9,500

How Much to Set Aside

Net IncomeFederal + SE TaxState (Est)Monthly Savings
$50,000$10,000$2,500$1,042
$75,000$16,500$4,000$1,708
$100,000$23,000$5,500$2,375
$150,000$36,000$9,000$3,750

How to Pay

  1. IRS Direct Pay: irs.gov/payments (free, instant)
  2. EFTPS: eftps.gov (requires enrollment)
  3. Credit card: ~2% fee
  4. Mail check: Include Form 1040-ES

FAQ

What if I miss a deadline?

Pay immediately. Penalties accrue daily. Even late payment reduces penalties.

Do I have to pay equally each quarter?

No, if your income varies. Use Form 2210 to annualize.

What if I overpay?

Overpayments apply to next year or you can request a refund.

Last updated: March 2026