Quarterly Tax Calculator – Self-Employment Estimated Tax
Calculate quarterly estimated tax payments for freelancers and self-employed individuals.
About This Calculator
Calculate quarterly estimated tax payments for freelancers and self-employed individuals. Use the calculator above for instant results.
Worked Examples
- SE tax: $11,303 | Income tax: ~$9,288
- Total: ~$20,591 | Quarterly: ~$5,148
Answer: ~$5,148/quarter
- SE tax: $7,064 | Income tax: ~$3,200
- Quarterly: ~$2,566
Answer: ~$2,566/quarter
- Quarterly: ~$9,500
Answer: ~$9,500/quarter
Who Uses This Calculator?
Calculate IRS quarterly tax payments.
Avoid underpayment penalties.
Plan cash flow for tax obligations.
Estimate quarterly payments for clients.
Common Mistakes to Avoid
❌ Missing quarterly deadlines
Q1 due April 15, Q2 June 15, Q3 September 15, Q4 January 15. Missing deadlines triggers underpayment penalty (typically 3-4% annually).
❌ Paying on gross income
Pay estimated tax on NET self-employment income after business expenses, not gross revenue.
Frequently Asked Questions
Quarterly tax due dates?
April 15, June 15, September 15, January 15 of following year.
Safe harbor rule?
Pay at least 100% of prior year tax (110% if income over $150K) to avoid underpayment penalty.
What is SE tax?
Self-employment tax: 15.3% (Social Security 12.4% + Medicare 2.9%) on 92.35% of net income. You deduct half on your return.