Hawaii is one of the more regulated states for the trades. You need a state contractor license to take work on, and the income tax runs up to 11%, so both your paperwork and your tax bill are heavier here than average. Knowing the rules is the difference between a healthy margin and a nasty surprise.
Each section below points to a tool that runs your exact numbers for Hawaii.
Tax in Hawaii
Hawaii has a graduated state income tax that runs up to 11% at the top, on top of your federal taxes. Graduated means the rate climbs as your profit does, so a good year costs proportionally more. You owe federal income tax and self-employment tax as well, and you make estimated payments to both Hawaii and the IRS through the year.
On sales tax, Hawaii is one to read carefully. GET ~4% state on ALL gross receipts incl. labor (+0.5% Oahu surcharge). Charging tax you should not, or eating tax you should have passed on, comes straight off your margin, so confirm it for your kind of job.
Work out what to hold back on the Tax Set-Aside Calculator, which runs the federal and self-employment numbers for Hawaii.
Getting paid: liens and retainage
A mechanic's lien is the tool that actually gets a Hawaii contractor paid, and in Hawaii you generally have to record it within 45 days of the statutory date of completion (see below, it is not the day you finished). Miss it and you lose the lien, so the dates matter.
Enforcing it has its own clock. 3 months from the entry of the Order Directing Lien to Attach, the court's order, not the date you applied. Work out your dates on the Lien Deadline tool, and if they are close, get an attorney to confirm them against the statute (HRS §§507-43(b), (e), (f), (g)).
On money held back as retainage, here is where Hawaii lands:
- Private work: No statutory cap on private work in Hawaii. Whatever your contract says governs, so read the withholding clause.
- Public work: 5% of the total amount due the contractor.
- Release: Private: no number of days is set at all. It falls due on whatever the contract says. Public: no number of days is set at all. It falls due on the statute names no release event or period for paying the contractor.
- Prompt pay: Public: money paid to a contractor must reach subcontractors within 10 days, and late payment carries 1.5% a month on the outstanding amount. Private: the same 1.5% a month applies to sums owed to a subcontractor from the date payment is due.
And the step-down is not the same thing as a right. Hawaii cuts the rate to 0% when 50% of the contract is completed and progress is satisfactory. That drop is not automatic: somebody has to make a finding in your favor first, and reaching the milestone on its own entitles you to nothing. Ask in writing and get the finding recorded. Expressly reversible: if progress is not satisfactory the procurement officer may continue to withhold, up to 5% of the amount due. Money already held is not released at the halfway mark either.
Check the Retainage Calculator before you sign a contract that holds back more.
Free Hawaii retainage letters
Three letters written for Hawaii's rules, with the state's own release clock and its statutory citation already in them. Fill one in on screen and download it as a PDF or a Word file.
- Retainage Release Request (Hawaii), for when the job is done and the money has not come back
- Retainage Overdue: Demand for Payment (Hawaii), for when the release date has passed and nothing has arrived
- Retainage Held Above the Cap: Challenge Letter (Hawaii), for when more is being held than the state appears to permit
Do you need a license in Hawaii?
Hawaii requires a state contractor license to take building work on. The threshold that triggers it: Exempt at or under $1,500, 'not more than $1,500' includes the figure itself. Working unlicensed when your job needs a license is the expensive mistake here. A 1971 Hawaii Supreme Court decision held county contractor-licensing ordinances invalid because ch. 444 is the exclusive legislation applicable to contractors. TWO THINGS DEFEAT THE DOLLAR EXEMPTION regardless of price: a required building permit, and the anti-fragmentation rule, which disapplies it where the work is only part of a larger project or where the job is split into sub-1,500 contracts to evade the chapter. AND A DISASTER IS AN AGGRAVATION, NOT AN EXEMPTION: 444-10.6(e) sets a fine up to 10,000 dollars and up to a year imprisonment for unlicensed work on damage caused by a natural disaster in an area under a governor-proclaimed emergency, in addition to all other penalties. There are NO license-class dollar caps in Hawaii - 444-7 classifies by TYPE OF WORK, and the A/B/C contract-value tiers some license-prep vendors describe have no statutory or regulatory basis. The license comes from DCCA, Professional & Vocational Licensing. Hawaii accepts the NASCLA commercial exam, useful if you work across state lines.
Trade licenses for electrical, plumbing and HVAC are usually separate and often required even where a GC license is not. See what applies to your trade on the Contractor License Checker.
Building codes and permits
Hawaii adopts its building codes statewide, so the rules travel with you across the state. Editions still move, so confirm yours with the building department before you price a job.
- Homes: 2018 (Hawaii State Residential Code, effective 17 November 2020)
- Electrical: CONTESTED: the Building Code Council's own page says 2018, its codified administrative rules still say 2017, and national compilations say 2020. Confirm with your county before you price electrical work
- Energy: 2018, with ASHRAE 90.1-2016 for commercial (effective 15 December 2020)
- Plumbing: 2018 UPC (effective 19 May 2020)
Hawaii's State Building Code Council issues a code, but each of the four counties adopts it separately, may amend it, and had up to two years to do so, with the state edition becoming the county default only if the county did nothing. Since the Governor's 15th Emergency Proclamation of 23 September 2025 the Council's power to update codes is suspended, along with the two-year county deadline, so the 2018-vintage editions are frozen and counties are not being pushed onto anything newer. The electrical edition is genuinely unsettled: the Council's own summary page and its own codified rules give different answers, and neither matches the national trackers. Ask your county building department which edition it is enforcing at permit intake.
Source: Hawaii State Building Code Council (ags.hawaii.gov/bcc) under HRS §§107-22 to 107-31; Hawaii Administrative Rules title 3; Governor's 15th Emergency Proclamation Relating to Affordable Housing, 23 September 2025. We have not yet read this row against Hawaii's own adopting authority, so confirm the edition locally before you rely on it.
Check a specific job on the permit tool.
Pay and workers' comp
The minimum wage in Hawaii is $16.00 an hour. That is the floor for anyone you put on the books, and it is worth confirming against the state labor department each year because several states step their rate mid-year. Check a rate on the minimum-wage tool.
Workers' comp rates in Hawaii are not published as a single figure; they turn on your trade's class code and your payroll. Get a realistic range on the Workers' Comp Estimator, then get a real quote.
If a client will not pay
If a client will not pay, you can sue for up to $5,000 in Hawaii's District Court, Small Claims Division and lawyers are restricted, so it stays fairly informal. That covers most unpaid-invoice disputes for a small outfit; a bigger claim goes to regular civil court where you will probably want an attorney. Walk through whether filing is worth it on the Small Claims checker.
The clock runs the other way too: a client generally has 6 years to sue you over the work under a written contract in Hawaii, with an absolute cutoff 10 years after the job is substantially complete. Work out your exposure on the Warranty & Claim Deadline tool.
Common questions
How much state income tax will I pay in Hawaii?
Hawaii has a graduated rate up to 11% state income tax on your profit, on top of federal income tax and self-employment tax. Use the Tax Set-Aside Calculator to see what to hold back.
Do I need a contractor's license in Hawaii?
Yes. Hawaii requires a state contractor license. The threshold: Exempt at or under $1,500, 'not more than $1,500' includes the figure itself. It is issued by DCCA, Professional & Vocational Licensing.
What is the small claims limit in Hawaii?
You can sue for up to $5,000 in Hawaii's District Court, Small Claims Division. The filing fee is typically $30 to $35. Larger claims go to regular civil court.
How long do I have to file a mechanic's lien in Hawaii?
Generally 45 days from the statutory date of completion (see below, it is not the day you finished). Miss it and you lose the lien. Work your own dates out on the Lien Deadline tool.
How much retainage can be held back in Hawaii?
Public: 5% of the total amount due the contractor. Run your own figure on the Retainage Calculator.
Are there free Hawaii contract and payment forms?
Yes. This page links 3 retainage letters written to Hawaii's own release clock and carrying its statutory citation. They are free, there is no sign-up, and you fill one in on screen and download it as a PDF or a Word file.
What is the minimum wage in Hawaii?
$16.00 an hour in Hawaii, above the federal $7.25. Several states step their rate mid-year, so confirm it before you set a payroll.
The honest bit
These are the 2026 rules for Hawaii as they stood when this guide was written, and they change: legislatures move thresholds, deadlines and rates every year. Treat this as general guidance to point you in the right direction, not legal, tax or financial advice. Verify anything you rely on at the source (the IRS, the Hawaii tax and licensing agencies, and your local building department) or with a professional. Where Hawaii does something unusual, the detail is called out above rather than glossed over.
Related: Tax Set-Aside Calculator · Mechanic's Lien Deadline · Contractor License Checker · Small Claims checker · Working in Your State
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Sources
- Hawaii contractor licensing authority · Hawaii contractor licensing authority. Who must hold a contractor or trade license in Hawaii, and the licensing instrument (HRS 444-2(4))
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