Hawaii Estate Tax Calculator

Pri Geens

Pri Geens

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Hawaii Estate Tax Calculator

Estimate the combined federal and Hawaii estate tax on a Hawaii decedent’s estate. Hawaii is one of the few states with its own estate tax: a decoupled tax with a $5,490,000 basic exclusion and graduated rates from 5.5% to 16% on the Hawaii taxable estate, filed on Form M-6. Hawaii has no inheritance tax and no gift tax. Three modes: estimate the tax, test a larger estate, or solve for the years of gifting needed to reach zero. Fields marked * are required; Calculate names any left empty.

Hawaii rules this calculator enforces: state estate tax YES — decoupled from federal, basic exclusion $5,490,000 (static; VERIFY), graduated rates 5.5% to 16% applied to the Hawaii taxable estate (federal taxable estate minus the Hawaii exclusion), filed on Form M-6 (VERIFY rates/exemption against HRS and Form M-6); no inheritance tax; no gift tax; common-law (equitable distribution) state, not community property; spousal elective share modeled as one-third of the net estate (VERIFY exact fraction and augmented-estate base); summary disposition / affidavit collection where personal property is $100,000 or less (VERIFY current figure); probate venue in the Circuit Court of the circuit of residence (First Circuit Oahu, Second Circuit Maui/Molokai/Lanai, Third Circuit Hawaii Island, Fifth Circuit Kauai).
Federal: unified estate and gift schedule topping at 40%; basic exclusion $13,610,000 (2024), $13,990,000 (2025), $15,000,000 (2026); federal portability (DSUE) allowed; unlimited marital and charitable deductions; GST 40%.
Sets the federal exclusion and annual gift exclusion. Hawaii exclusion is static at $5,490,000.
Circuit Court probate venue; the estate tax is state-wide.Required. Please choose a Hawaii circuit.
Select a circuit to see the Circuit Court venue, the small-estate threshold, and the federal and Hawaii exclusions for the selected year.

Assets at date of death

Home, land, rental buildings at fair market value.Enter 0 or a positive amount.
Checking, savings, CDs, stocks, bonds, mutual funds.Enter 0 or a positive amount.
IRAs, 401(k)s, 403(b)s, pensions, annuity contracts.Enter 0 or a positive amount.
Death benefit includible when the decedent held any incident of ownership.Enter 0 or a positive amount.
Closely held business, vehicles, equipment, receivables, trusts includible in the estate.Enter 0 or a positive amount.
Hawaii is a common-law (equitable distribution) state, not community property, so no community-property halving or double step-up applies.

Debts and administration costs

Deductible obligations of the decedent.Enter 0 or a positive amount.
Deductible when paid by the estate.Enter 0 or a positive amount.
Deductible administration expense.Enter a percentage between 0 and 25.
Filing fees, publication, appraisal costs.Enter 0 or a positive amount.
Deductible if not compensated by insurance.Enter 0 or a positive amount.

Bequests and marital status

Unlimited marital deduction for a citizen spouse or a QDOT (federal and Hawaii).Enter 0 or a positive amount.
Unlimited deduction for qualifying charities.Enter 0 or a positive amount.

Prior gifts, portability and GST

Post-1976 taxable gifts; they consume the federal exclusion. Hawaii has no gift tax.Enter 0 or a positive amount.
Federal portability only; Hawaii does not port its own exclusion.Enter 0 or a positive amount.
Federal GST at a flat 40% on Form 706 Schedule R.Enter 0 or a positive amount.
Equals the federal basic exclusion for the year of death.Enter 0 or a positive amount.

Gifting plan

Required in gifting mode. Annual-exclusion gifts are not taxable gifts.Required in gifting mode. Enter 1 or more donees.
Amounts above the annual exclusion become taxable gifts.Enter 0 or a positive amount.
Gifts carry over basis and lose the step-up at death.Enter 0 or a positive amount.
Hawaii’s low $5,490,000 exclusion can require many years; raise this if needed.Enter a whole number between 1 and 200.

How it works

  • Hawaii has its own estate tax. Hawaii’s estate tax is decoupled from federal: a static $5,490,000 basic exclusion and graduated rates from 5.5% to 16% applied to the Hawaii taxable estate (federal taxable estate minus the Hawaii exclusion), filed on Form M-6. Exclusion and rates are flagged VERIFY against HRS and Form M-6.
  • Federal estate tax also applies above the federal basic exclusion using the unified 18% to 40% schedule; the federal GST applies at 40% to direct skips above the allocated GST exemption.
  • Portability is federal only. A surviving spouse may inherit the unused federal exclusion (DSUE) with a timely Form 706; Hawaii does not port its own exclusion.
  • No community property. Hawaii is a common-law state, so no halving of community assets and no double basis step-up.
  • Elective share. Modeled as one-third of the net estate (VERIFY exact fraction and augmented-estate base under Hawaii probate law).
  • Small estates. Summary disposition / affidavit collection where personal property is $100,000 or less (VERIFY current figure).
  • Binding factor names what controls the result: the Hawaii exclusion, the federal exclusion, the federal unified schedule, or the GST.
  • Gifting mode uses the guarded bisection solver (60 expansions, 90 iterations, rounded up). Because Hawaii’s exclusion ($5,490,000) is far below the federal exclusion, eliminating all tax usually requires many decades of annual-exclusion gifting — the calculator reports this honestly.
  • Gifting is not free. Carryover basis loses the step-up; the deferred gain is netted against the tax saved.

Sources

  • Hawaii Revised Statutes estate tax provisions and Hawaii Form M-6 (state estate tax, decoupled, basic exclusion $5,490,000 static, graduated rates 5.5% to 16%) — VERIFY current exclusion and rate schedule with the Hawaii Department of Taxation.
  • Hawaii probate provisions for elective share (modeled one-third of net estate; VERIFY) and small-estate summary disposition / affidavit collection ($100,000 personal property; VERIFY); Circuit Court venue by circuit of residence (First, Second, Third, Fifth Circuits).
  • IRC chapter 11 unified schedule and exclusion ($13,610,000 / $13,990,000 / $15,000,000 for 2024 / 2025 / 2026); IRC 2010 portability; IRC 2042 life insurance inclusion; IRC 2055 charitable deduction; IRC chapter 13 GST at 40%; IRC 1014 step-up and 1015 carryover basis.
  • IRS Form 706 and Form 4768 instructions (9-month deadline, 6-month filing extension).

Test cases

TC1 – Below both exemptions. Honolulu (First Circuit), 2025, single. Real 3,000,000; financial 1,500,000; retirement 1,000,000; debts 300,000; funeral 15,000; atty 2%; court 400.
Gross 4,500,000; admin 84,400; deductions 399,400; net estate 4,100,600; TE 4,100,600 below 5,490,000 HI and 13,990,000 federal. Federal $0, Hawaii $0, TOTAL $0. Federal headroom 9,889,400. Small-estate affidavit NOT available (personal property 2,500,000).
TC2 – Above Hawaii exemption only. Honolulu, 2025, single. Real 6,000,000; financial 3,000,000; retirement 2,000,000; debts 500,000; funeral 20,000; atty 2%; court 400.
Gross 11,000,000; admin 210,400; deductions 730,400; net estate 10,269,600; TE 10,269,600 below 13,990,000 federal but above 5,490,000 HI. HI taxable 4,779,600; Hawaii estate tax ~641,736. Federal $0. TOTAL ~641,736. Effective ~5.83%.
TC3 – Above both, marital + DSUE. Honolulu, 2025, married 20 years, citizen spouse, bequest 5,000,000, DSUE 2,000,000. Real 15,000,000; financial 6,000,000; life 3,000,000; debts 400,000; funeral 25,000; atty 2%; court 400.
Gross 24,000,000; admin 472,400; deductions 897,400; net estate 23,102,600; less marital 5,000,000 = TE 18,102,600; federal exclusion 15,990,000. Federal ~845,040. HI taxable 12,612,600; Hawaii ~1,895,016. TOTAL ~2,740,056. Effective ~11.42%. Elective share one-third = 7,700,867.
TC4 – Gifting solver, 2026, maxYears 200. Honolulu, single. Real 9,000,000; financial 5,000,000; retirement 3,000,000; business 2,000,000; debts 300,000; funeral 15,000; atty 2%; court 400; 4 donees at 19,000.
Gross 19,000,000; admin 374,400; deductions 689,400; net estate 18,310,600; TE 18,310,600. Federal ~1,324,240; HI taxable 12,820,600; Hawaii ~1,928,296; TOTAL ~3,252,536. Solver must reach the LOWER Hawaii exclusion 5,490,000: 76,000/yr requires 169 YEARS (removes 12,820,600) – demonstrates Hawaii’s low exclusion makes annual-exclusion gifting impractical.
TC5 – Small estate, affidavit eligible. Kauai (Fifth Circuit), 2025, married 5 years, citizen spouse. Financial 60,000; retirement 20,000; debts 3,000; funeral 4,000; atty 2%; court 300.
Gross 80,000; admin 1,840; deductions 8,840; net estate 71,160; TE 71,160. Federal $0, Hawaii $0, TOTAL $0. Small-estate affidavit available (personal property 80,000 at or below 100,000). Elective share one-third = 23,720.

Estimates only. Not legal, tax or financial advice. Hawaii exclusion and rate schedule are flagged for verification against HRS and Form M-6. Verify all figures with the Hawaii Department of Taxation and federal rules before relying on them.

What Is the Hawaii Estate Tax Calculator?

The Hawaii Estate Tax Calculator is a planning tool that estimates transfer taxes using the asset values, deductions, gifts, and family information entered by the user. Unlike calculators for states with no estate tax, this tool calculates a separate Hawaii estate tax as well as possible federal estate tax and federal generation-skipping transfer tax.

The calculator uses a fixed $5,490,000 Hawaii basic exclusion and a graduated Hawaii tax schedule from 5.5% to 16%. It also applies the federal exclusion for the selected year, adds DSUE for federal purposes, and estimates total transfer tax. The Hawaii exclusion and state rate schedule are specifically flagged in the calculator code for verification before relying on the results.

In practical terms, the Hawaii estate tax calculator shows whether the modeled taxable estate exceeds Hawaii’s $5,490,000 exclusion, whether it also exceeds the federal applicable exclusion, and how much state, federal, and GST tax the calculator produces. It also estimates what remains for other heirs after the modeled transfers and taxes.

How the Hawaii Estate Tax Calculator Formula Works

The calculation begins by adding the five asset categories entered in the form: real property, financial accounts, retirement accounts and annuities, decedent-owned life insurance, and business interests or other property.

G=R+F+Q+L+BG = R + F + Q + L + B

G is gross estate. R is real property, F is bank and investment accounts, Q is retirement assets, L is life insurance, and B is business interests, personal property, and other includible assets.

Administration cost is calculated from gross estate minus debts, with that base never allowed below zero. The entered attorney and administrator percentage is applied to that amount, then court costs are added.

A=max⁡(G−D,0)×p100+CA = \max(G-D,0)\times\frac{p}{100}+C
N=max⁡(G−D−Fu−A−Ls,0)N = \max(G-D-F_u-A-L_s,0)

N is net estate, D is debts, Fu is funeral expense, A is administration cost, and Ls is casualty or theft losses. An allowed marital deduction is capped at the net estate. It requires a surviving spouse who is a U.S. citizen or a non-citizen spouse whose bequest passes to a QDOT. The charitable deduction is limited to the amount left after the marital deduction.

TE=max⁡(N−M−Ch−GR,0)TE = \max(N-M-C_h-GR,0)

TE is taxable estate, M is the marital deduction, Ch is the charitable deduction, and GR is any annual-exclusion gifting reduction modeled by the calculator.

HItaxable=max⁡(TE−5,490,000,0)HI_{taxable}=\max(TE-5{,}490{,}000,0)
THI=SHI(HItaxable)T_{HI}=S_{HI}(HI_{taxable})

SHI is the calculator’s progressive Hawaii schedule, which uses rates from 5.5% through 16%. For federal tax, earlier taxable gifts are added to the taxable estate. DSUE is added to the federal basic exclusion.

Bf=TE+GpB_f = TE + G_p
Ef=BEA+DSUEE_f = BEA + DSUE
Tf=max⁡(0,Sf(Bf)−Sf(Ef))T_f = \max(0,S_f(B_f)-S_f(E_f))
TGST=0.40×max⁡(SKIP−XGST,0)T_{GST}=0.40\times\max(SKIP-X_{GST},0)
Ttotal=Tf+THI+TGSTT_{total}=T_f+T_{HI}+T_{GST}

For example, consider a 2025 single decedent with $11,000,000 of assets, $500,000 of debts, $20,000 of funeral expenses, a 2% administration fee, and $400 of court costs. Administration cost is $210,400. Total deductions are $730,400, leaving a taxable estate of $10,269,600. The federal tax is $0 because this is below the $13,990,000 federal exclusion. Hawaii taxable estate is $4,779,600 after subtracting $5,490,000. The coded Hawaii schedule produces about $641,736 of Hawaii estate tax, making total transfer tax about $641,736 when no GST tax applies.

How to Use the Hawaii Estate Tax Calculator: Step by Step

  1. Choose a calculation mode. You can estimate tax on the current estate, test whether a larger estate would be taxed, or solve for years of annual-exclusion gifting needed to eliminate the modeled tax.
  2. Select the year of death from 2024, 2025, or 2026. Then choose the circuit or county of residence for the Circuit Court venue.
  3. Enter the date-of-death values for real property, financial accounts, retirement assets, decedent-owned life insurance, and business interests or other property.
  4. Enter debts, mortgages, funeral expenses, the attorney and administrator fee percentage, Circuit Court costs, and casualty or theft losses.
  5. If the decedent was married, select that option and enter spouse citizenship or QDOT status and any bequest to the surviving spouse. Enter charitable bequests separately.
  6. Enter earlier taxable gifts, DSUE from a predeceased spouse, direct skips to grandchildren or later generations, and the GST exemption allocated.
  7. For gifting mode, enter the number of donees, annual gift per donee, unrealized gain in gifted assets, the heirs’ capital-gains rate, NIIT choice, and maximum years to test.
  8. Check the required acknowledgment and calculate. The tool checks required selections and numeric limits before displaying results.

The result separates Hawaii estate tax, federal estate tax, and federal GST tax. It also shows the taxable estate, Hawaii taxable estate, exclusions, federal headroom, effective transfer-tax rate, marginal rate, filing indicators, estimated amount going to other heirs, elective-share estimate, small-estate status, and gifting results when applicable.

What Your Hawaii Estate Tax Calculator Result Means

Hawaii and federal exclusions are different

The biggest distinction in this calculator is the gap between the Hawaii and federal exclusions. Hawaii uses the same $5,490,000 amount for every supported year. The federal amount changes with the selected year. DSUE increases only the federal applicable exclusion and does not increase the Hawaii exclusion.

Year of deathFederal basic exclusionHawaii exclusion usedAnnual gift exclusion used
2024$13,610,000$5,490,000$18,000 per donee
2025$13,990,000$5,490,000$19,000 per donee
2026$15,000,000$5,490,000$19,000 per donee

A Hawaii tax can appear even when federal estate tax is zero

Because the coded Hawaii exclusion is much lower, the calculator can produce Hawaii estate tax while federal estate tax remains $0. Once taxable estate exceeds $5,490,000, the excess enters the Hawaii graduated schedule. Federal estate tax starts only when the federal base exceeds the applicable federal exclusion, including any entered DSUE.

The elective-share result is an approximation

If the decedent is marked married, the calculator displays an elective-share estimate equal to one-third of the calculated net estate. The code itself flags both the exact fraction and the proper augmented-estate base for verification. This result should therefore be treated as a simplified modeled figure, not a legal determination of a surviving spouse’s rights.

Small-estate status uses a specific coded test

The calculator marks the small-estate result as available when financial accounts, retirement assets, life insurance, and business or other personal property total $100,000 or less. Real property is not included in that test. The $100,000 threshold is also flagged in the code for verification against current Hawaii probate rules.

Gifting mode may require a long planning period

For each donee, the calculator uses the smaller of the entered gift and the coded annual exclusion. It multiplies that amount by the number of donees and years. Because the solver must eliminate both state and federal transfer tax, Hawaii’s lower exclusion can control the required period. The maximum testing horizon is 200 years.

The gifting analysis also estimates deferred capital gains from carryover basis. It applies the selected 0%, 15%, or 20% long-term capital-gains rate to the entered unrealized gain and adds 3.8% when NIIT is selected. The displayed net benefit subtracts this estimated basis cost from the modeled transfer-tax savings.

This calculator provides estimates only. The Hawaii exclusion, Hawaii estate-tax schedule, elective-share assumption, and small-estate threshold are specifically marked in the code for verification. Actual results can also differ because of valuations, ownership, deductions, trusts, prior transfers, filing elections, beneficiary facts, and changes in federal or Hawaii law. The output is not legal, tax, or financial advice.

Estate Tax Calculators for All 50 U.S. States

Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming

Frequently Asked Questions

Does Hawaii have an estate tax?

Yes, this calculator models a separate Hawaii estate tax. It uses a fixed $5,490,000 Hawaii exclusion and a graduated schedule ranging from 5.5% to 16%. Those Hawaii figures are explicitly marked in the calculator code for verification against current Hawaii law and Form M-6 before the result is relied upon.

How is Hawaii estate tax calculated in this calculator?

The calculator first determines taxable estate after its coded debts, expenses, marital deduction, charitable deduction, and any modeled annual-exclusion gifting. It subtracts $5,490,000 from taxable estate, floors the result at zero, and applies its progressive Hawaii rate schedule to that Hawaii taxable estate.

Can I owe Hawaii estate tax but no federal estate tax?

Yes. The calculator can show Hawaii estate tax while federal estate tax remains zero because its Hawaii exclusion is much lower than its federal exclusions. For example, its 2025 federal exclusion is $13,990,000, while the Hawaii exclusion stays at $5,490,000. An estate between those levels can therefore produce state tax only.

Does DSUE increase the Hawaii estate tax exemption?

No. The code applies DSUE only to the federal estate-tax calculation. It adds the entered DSUE amount to the federal basic exclusion but keeps Hawaii’s exclusion fixed at $5,490,000. The results section therefore describes federal portability as available while stating that portability of the Hawaii exclusion is not allowed.

Does Hawaii have an inheritance tax or gift tax in this calculator?

No. The calculator sets Hawaii inheritance tax to $0 and does not calculate a Hawaii gift tax. It can still estimate Hawaii estate tax, federal estate tax, and federal GST tax. Its gifting feature models annual-exclusion transfers as an estate-reduction strategy rather than calculating a separate Hawaii gift-tax liability.

How does the Hawaii gifting calculator determine the years needed?

The gifting mode searches for the number of years that reduces modeled total transfer tax to zero. It uses each donee’s gift only up to the coded annual exclusion, then repeatedly tests the estate calculation. The result is rounded upward to a whole year and cannot exceed the maximum horizon entered by the user.

How accurate is the Hawaii Estate Tax Calculator?

The calculator follows the formulas and fixed assumptions programmed into its code, but its results are estimates. Several Hawaii-specific figures are expressly flagged for verification, and the tool does not collect every fact relevant to a real estate-tax return or probate matter. Current law and professional review may produce different results.

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