2025 Tax Year

Hawaii Side Hustle Tax Calculator

Calculate your Hawaii state tax (7.60%), federal tax, and self-employment tax on 1099 income.

HI7.60%

1.4 million residents

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2025 rates

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Last updated: January 2026 · Data from IRS Rev Proc 2024-40

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State

W-2 Income (from your day job)

Side Hustle Income *

Business Expenses (optional)

Hawaii side hustlers face some of the highest state income tax rates in the nation, with a top rate of 11% on high earners. The Aloha State has 12 tax brackets—the most complex system in the country. However, recent reforms have adjusted brackets to provide relief for middle-income earners.

Hawaii Tax Guide

How Side Hustle Taxes Work in Hawaii

Hawaii has a complex progressive system with 12 brackets:

**Hawaii state tax rates (2025):** - 1.4% on income up to $9,600 (single) - Rates increase gradually through multiple brackets - 7.6% on income $48,000-$72,000 - 8.25% on income $72,000-$96,000 - 9.0% on income $96,000-$175,000 - 10.0% on income $175,000-$325,000 - 11.0% on income over $325,000

**Key considerations:** - Hawaii's high cost of living compounds the tax burden - No local income taxes, but high excise taxes on goods

Example

What Hawaii Side Hustlers Owe

Let's say you're a single filer in Honolulu with a $60,000 W-2 job and $18,000 in side hustle income from freelance marketing, with $2,500 in business expenses.

**Your estimated taxes on the side hustle:** - Net self-employment income: $15,500 - Federal SE tax (15.3% of 92.35%): ~$2,192 - Federal income tax on side income: ~$3,410 (22% bracket) - Hawaii state tax (7.6%): ~$1,178 - **Total additional tax: ~$6,780**

Your effective tax rate on the side hustle is about 44%.

Important Dates

Hawaii Tax Deadlines 2025

Hawaii estimated tax deadlines: - **Q1**: April 20, 2025 - **Q2**: June 20, 2025 - **Q3**: September 20, 2025 - **Q4**: January 20, 2026

Use Hawaii Form N-1 for state estimated tax payments.

Save Money

Common Deductions for Hawaii Freelancers

Hawaii freelancers should maximize every deduction given the state's high progressive rates. **Home office expenses**: Claim dedicated business space using simplified ($5/sq ft) or actual expense method—especially valuable given Hawaii's high housing costs. **Business mileage**: 67 cents/mile for 2025; track carefully if serving clients across different islands. **Inter-island travel**: Flights and transportation for business between islands are deductible—a unique Hawaii consideration. **Equipment and supplies**: Computers, cameras, tools, and office supplies are deductible. **Health insurance premiums**: Self-employed individuals can deduct 100% of health insurance costs. **Retirement contributions**: SEP-IRAs and Solo 401(k)s reduce both federal and Hawaii taxable income—especially valuable given HI's high rates. Every dollar contributed saves you at federal rate plus 7.6-8.25% or more. **Marketing expenses**: Website costs, business cards, and promotional materials are deductible. Hawaii starts with federal AGI, so all Schedule C deductions reduce your HI taxes.

Common Questions

Hawaii Side Hustle Tax FAQ

Why does Hawaii have such high tax rates?

Hawaii has high state spending needs and no county income taxes. The 11% top rate only applies to income over $325,000; most side hustlers pay 7.6-8.25%.

Does Hawaii have local income taxes?

No, Hawaii has no county or city income taxes. The state tax is your only income tax, though Hawaii has high excise (sales) taxes.

How does Hawaii compare to other states?

Hawaii's top rate of 11% is third-highest nationally (behind California's 13.3% and New Jersey's 10.75%). For mid-income earners, rates are 7.6-8.25%.

Do I need to register my side hustle in Hawaii?

Most businesses need to register with the Hawaii Department of Commerce and Consumer Affairs. Sole proprietors may need a General Excise Tax (GET) license. LLCs must register with DCCA.

What is Hawaii's General Excise Tax (GET)?

Hawaii's GET is similar to a sales tax but applies to gross business income, not just retail sales. The standard rate is 4% (4.5% on Oahu). Unlike sales tax, GET applies to services too, which can affect freelancers and consultants.