Whether it's a Waikiki studio bought for the income or a Kaimuki rental held for 20 years, the question investment sellers ask is some version of "what do I actually walk away with?" The honest answer is that the sale price is rarely the number that matters. What matters is what is left after the taxes take their cut, and on an investment property in Hawaii there are four separate bites to plan for. Here is how each one works, in plain English, so you can have a real conversation with your CPA before you list.
Your "profit" is bigger than you think
Most owners calculate gain as sale price minus what they paid. The IRS does not. Your taxable gain is the sale price minus your adjusted basis, and your adjusted basis is lower than your purchase price if you have been renting the property out.
Every year you owned a rental, you were allowed to claim depreciation as a deduction, and that depreciation reduced your basis. So a condo you bought for $700,000 and depreciated by $150,000 has an adjusted basis of roughly $550,000, not $700,000. When you sell, the gain is measured from that lower number, which is why the taxable gain often lands well above what felt like your real profit. This catches people off guard more than anything else on this list.
Bite one: federal capital gains tax
If you owned the property more than a year, the gain is a long-term capital gain at the federal level, taxed at 0%, 15%, or 20% depending on your taxable income. Most sellers of an Oahu investment property land in the 15% or 20% range. As a rough guide for 2026, the 20% rate kicks in above roughly $545,500 of taxable income for a single filer and about $613,700 for a married couple filing jointly.
On top of that, higher earners pay the Net Investment Income Tax of 3.8%. It applies once your modified adjusted gross income passes $200,000 if you file single or $250,000 if you file jointly, and a large one-time gain can easily push you over that line in the year you sell.
Bite two: depreciation recapture
This is the one that surprises people. Remember all that depreciation that lowered your basis? The IRS wants some of that benefit back when you sell. The portion of your gain that comes from depreciation you claimed (what the tax code calls unrecaptured Section 1250 gain) is taxed at a federal rate of up to 25%, which is higher than the long-term capital gains rate most sellers pay on the rest of the gain.
So in that $700,000 condo example, the roughly $150,000 of depreciation gets taxed at up to 25%, and the rest of the gain at your regular long-term rate. You owe recapture whether or not you actually deducted the depreciation each year, so confirm with your accountant that you claimed what you were entitled to.
Bite three: Hawaii's state capital gains tax
Hawaii taxes the gain too. The state's top ordinary income tax rate is 11%, one of the highest in the country, but Hawaii law caps the rate on net capital gains at 7.25% for individuals under its alternative capital gains tax. Bills to raise or remove that cap come up at the Legislature (in 2026, HB 1850 would have raised it to 9%), but that bill died and the 7.25% cap is still current law as of this writing. It is worth keeping an eye on, because it comes back most sessions.
So on the state side you are usually looking at around 7.25% of the gain rather than the full 11%, but the exact treatment depends on your return.
Bite four: HARPTA withholding at closing
This one is not an extra tax, but it feels like one because it takes cash out of your proceeds the day you close. HARPTA is the Hawaii Real Property Tax Act, and it requires the buyer to withhold 7.25% of the gross sale price from any seller who is not a Hawaii resident, then send it to the state. It is reported on Form N-288 and N-288A. Note that this is 7.25% of the full sale price, not of your gain, so on a $1.2 million sale that is roughly $87,000 held back.
The good news is that HARPTA is a prepayment, not a final tax. When you file your Hawaii return and reconcile what you actually owe, you get the difference back as a refund. There are also ways to reduce it up front. A resident seller, or a seller using a nonrecognition provision such as a 1031 exchange, can file Form N-289 to certify an exemption. And if your actual gain is small, you can apply for a withholding certificate on Form N-288B to lower the amount held at closing instead of waiting a year for the refund.
Separately, if the seller is a foreign person, the federal FIRPTA rules add their own withholding of 15% of the sale price. Foreign sellers can face both HARPTA and FIRPTA, so that is a conversation to have with your CPA and escrow well before the signing date.
Legal ways to defer or soften the hit
You have more options than most sellers realize, and the right one depends on your situation:
- 1031 exchange. If you are selling one investment property to buy another, a 1031 exchange lets you defer both the federal and Hawaii gain, including the depreciation recapture, as long as you follow the timing and reinvestment rules exactly. The deadlines are strict, so you line this up before you close, not after.
- Installment sale. If you carry back financing and collect the price over several years, you may be able to spread the gain across those years rather than recognizing it all at once, which can keep you in a lower bracket.
- Converting to a primary residence. The Section 121 exclusion of up to $250,000 of gain for a single filer or $500,000 for a couple applies to a primary home, not a rental. If you move into a former rental and live there long enough to qualify, part of the gain can be excluded, though special rules reduce the exclusion for the years it was a rental and you still owe recapture. It is worth professional advice.
- Timing and offsetting losses. Selling in a lower-income year, or pairing the sale with capital losses elsewhere in your portfolio, can meaningfully change the bill.
A simple example of how it stacks up
Say you bought an East Honolulu rental for $700,000, claimed $150,000 of depreciation, and sell for $1,200,000 with about $80,000 in selling costs. Your adjusted basis is around $550,000 and your total gain is roughly $570,000. Of that, the $150,000 tied to depreciation is taxed at up to 25% federally, and the remaining $420,000 is taxed at your long-term capital gains rate, plus the 3.8% NIIT if you are over the income threshold, plus Hawaii's 7.25%. A mainland owner also has 7.25% of the $1.2 million held back by HARPTA at closing and reconciled later. These numbers are illustrative only, meant to show the moving parts, not a prediction of your result.
Frequently asked questions
Do I pay Hawaii capital gains tax if I live on the mainland?
Yes. The gain is taxed where the property is, so a California or Washington owner still owes Hawaii tax on a sale of Oahu property, and HARPTA will withhold 7.25% of the price at closing. You file a Hawaii nonresident return to settle up and get any over-withholding back.
How do I get my HARPTA money back faster?
Two ways. You can file Form N-288B before closing to apply for a reduced withholding if your real gain is small, or you file your Hawaii return after the sale and claim the refund. I always tell out-of-state sellers to loop in their CPA early, because the N-288B route can free up a lot of cash that would otherwise sit with the state for a year.
Does a 1031 exchange get me out of depreciation recapture?
It defers it, not erases it. A properly structured 1031 exchange pushes both the capital gain and the recapture into the replacement property, so you owe nothing at the time of sale. The tax is still there in the background and comes due if you eventually cash out without exchanging again. The timing rules are unforgiving, so set it up before you list.
What about the conveyance tax when I sell?
That is separate from income tax. Hawaii's conveyance tax is a transfer tax paid at closing based on the sale price, and it is usually part of the seller's closing costs rather than a tax on your gain. I break those down in my Hawaii closing costs guide.
This is general information from a licensed real estate broker, not legal, tax, insurance or financial advice. Rules and figures change, so confirm anything that affects your decision with the right licensed professional. Talk to a licensed CPA or tax attorney about your own return before you make a move.
Sources: IRS Topic 409, capital gains, Hawaii Department of Taxation, HARPTA forms (N-288, N-288A, N-288B, N-289), HB 1850 (2026)
Tony Kawaguchi, R(B), The Kawaguchi Group, eXp Realty. Hawaii broker, license RB-21841, 20+ years and $1B+ in Oahu sales, leading a team of 20+ agents.
Plan the tax before you list, not after
The sellers who keep the most are the ones who ran these numbers with their accountant before the sign went in the yard, not the ones who found out at closing. I am happy to walk through what your property would likely sell for today and connect you with tax people who know Hawaii rules, so you see the real net before you commit to anything. Read how I approach selling, then reach out to me and we'll talk through your numbers.