Hawaii Quarterly Tax Calculator
Calculate your estimated quarterly tax payments for federal and Hawaii state taxes. Designed for self-employed individuals, freelancers, and independent contractors.
HI State Tax: Progressive 1.4% - 11.0%
Quarterly Payment Amount
$6,940
Per quarter (4 remaining)
Annual Tax Breakdown
2026 Payment Schedule
Jan 1 - Mar 31
Due: April 15, 2026
$6,940
Apr 1 - May 31
Due: June 15, 2026
$6,940
Jun 1 - Aug 31
Due: September 15, 2026
$6,940
Sep 1 - Dec 31
Due: January 15, 2027
$6,940
Don't miss your quarterly payments!
The IRS may charge penalties and interest if you underpay or pay late. Consider setting up automatic payments or calendar reminders.
Hawaii Quarterly Tax Highlights
Hawaii has 12 tax brackets with rates from 1.4% to 11%
One of the highest state tax rates in the country
Use Form N-1 for quarterly estimated payments
Complex bracket system with many rates
Hawaii Quarterly Tax FAQ
What is Hawaii's income tax rate?
Hawaii has a progressive income tax with 12 brackets ranging from 1.4% to 11%. The top rate of 11% applies to income over $200,000 (single) or $400,000 (married).
Hawaii Estimated Quarterly Tax Payments for Self-Employed Workers in 2026
Self-employed workers in Hawaii must pay both federal estimated taxes to the IRS and state estimated taxes to the Hawaii Department of Taxation. Hawaii has a progressive income tax with 12 brackets and rates ranging from 1.4% to 11%. If you expect to owe $500 or more in Hawaii state income tax after withholding and credits, you must make quarterly estimated payments using Form N-1.
Hawaii has one of the most complex state tax structures with 12 brackets. Its top rate of 11% is among the highest in the nation. Hawaii also imposes a General Excise Tax (GET) on business gross receipts, which self-employed individuals must factor into their pricing.
| Tax Layer | Rate / Range | Filed With | Form |
|---|---|---|---|
| Federal income tax | 10% – 37% | IRS | 1040-ES |
| Self-employment tax | 15.3% | IRS | 1040-ES / SE |
| Hawaii state income tax | 1.4% to 11% | Hawaii Department of Taxation | Form N-1 |
How Hawaii Income Tax Affects Your Quarterly Payments
Hawaii taxes personal income — including self-employment income — across 12 progressive brackets. The brackets below apply to single filers for tax year 2026. Married filing jointly thresholds are typically higher.
| Bracket | Taxable Income (Single) | Marginal Rate |
|---|---|---|
| 1 | $0 – $2,400 | 1.4% |
| 2 | $2,400 – $4,800 | 3.2% |
| 3 | $4,800 – $9,600 | 5.5% |
| 4 | $9,600 – $14,400 | 6.4% |
| 5 | $14,400 – $19,200 | 6.8% |
| 6 | $19,200 – $24,000 | 7.2% |
| 7 | $24,000 – $36,000 | 7.6% |
| 8 | $36,000 – $48,000 | 7.9% |
| 9 | $48,000 – $150,000 | 8.25% |
| 10 | $150,000 – $175,000 | 9.0% |
| 11 | $175,000 – $200,000 | 10.0% |
| 12 | $200,000+ | 11.0% |
To estimate your Hawaii quarterly payment, calculate your projected state tax liability using the brackets above, then divide by four. Hawaii payments are made to the Hawaii Department of Taxation through their online portal at tax.hawaii.gov or by mail using Form N-1.
Federal Self-Employment Tax and Quarterly Due Dates
All self-employed workers must pay federal self-employment (SE) tax of 15.3% on 92.35% of net earnings. This consists of 12.4% for Social Security (on earnings up to $184,500 in 2026) and 2.9% for Medicare (no cap). An additional 0.9% Medicare surtax applies to earnings above $200,000 (single filers).
Both Hawaii and federal estimated tax payments follow the same quarterly schedule:
| Quarter | Income Period | Due Date |
|---|---|---|
| Q1 | January 1 – March 31 | April 15, 2026 |
| Q2 | April 1 – May 31 | June 15, 2026 |
| Q3 | June 1 – August 31 | September 15, 2026 |
| Q4 | September 1 – December 31 | January 15, 2027 |
To avoid underpayment penalties, pay at least 100% of your prior-year tax liability (or 110% if your AGI exceeds $150,000) spread across four equal payments, or at least 90% of your current-year tax. You can deduct 50% of your self-employment tax from your adjusted gross income, reducing both your federal and Hawaii taxable income.
Related Calculators
Official References
This calculator uses current federal and Hawaii tax rates and schedules:
- IRS Estimated Tax Guidelines
Federal quarterly tax requirements and Form 1040-ES
- Hawaii Department of Taxation
Official Hawaii tax authority
- IRS Self-Employment Tax
Social Security and Medicare tax information
This calculator provides estimates based on 2026 tax rates. Your actual tax liability may vary based on deductions, credits, and other factors. Consult a tax professional for personalized advice.