HI Income Tax

Tax year 2025 brackets — Married filing jointly / Qualifying surviving spouse

| Taxable income | Rate | Cumulative tax at top of bracket | |---|---|---| | $0 – $19,200 | 1.40% | $269 | | $19,201 – $28,800 | 3.20% | $576 | | $28,801 – $38,400 | 5.50% | $1,104 | | $38,401 – $48,000 | 6.40% | $1,718 | | $48,001 – $72,000 | 6.80% | $3,350 | | $72,001 – $96,000 | 7.20% | $5,078 | | $96,001 – $250,000 | 7.60% | $16,782 | | $250,001 – $350,000 | 7.90% | $24,682 | | $350,001 – $450,000 | 8.25% | $32,932 | | $450,001 – $550,000 | 9.00% | $41,932 | | $550,001 – $650,000 | 10.00% | $51,932 | | Over $650,000 | 11.00% | — |HRS § 235-51; Hawaii DOTAX Tax Year 2025 schedules.

Standard deduction (tax year 2025)

| Filing status | Standard deduction | |---|---| | Single | $4,400 | | Married filing jointly | $8,800 | | Married filing separately | $4,400 | | Head of household | $6,424 |

Personal exemptions (tax year 2025)

| Item | Amount | |---|---| | Personal exemption (each taxpayer/spouse) | $1,144 | | Dependent exemption (each) | $1,144 |

Filing thresholds (tax year 2025)

| Filing status | Threshold (gross income) | |---|---| | Single (under 65) | $5,544 | | Single (65+) | $6,688 | | Married filing jointly (both under 65) | $11,088 | | Married filing jointly (one 65+) | $12,232 | | Head of household (under 65) | $7,568 |

Doing business filing requirement

Additionally, anyone "doing business" in Hawaii must file regardless of income level.

Starting point

Hawaii begins with federal adjusted gross income (AGI) from federal Form 1040, Line 11.

Hawaii taxable income calculation

Federal AGI ± Hawaii modifications = Hawaii AGI → minus standard or itemized deductions → minus personal exemptions = Hawaii taxable income → apply rate schedule.

QBI conformity

Hawaii starts from federal AGI. The federal QBI deduction (§199A) is below AGI and does NOT flow into Hawaii's computation.

SE health insurance deduction

Already reflected in federal AGI. Flows through to Hawaii automatically.

Retirement contributions

Already reflected in federal AGI. No Hawaii add-back required.

Home office deduction

Already reflected in Schedule C → federal AGI. Flows through automatically.

Quarterly estimated payment requirement

Self-employed individuals must make quarterly estimated payments if they expect to owe $500 or more.

Voucher due dates

April 20, June 20, September 20, January 20

GET interaction with income tax

Hawaii self-employed individuals are also subject to GET on gross business income (4% general rate, 4.5% in Honolulu County with the county surcharge). GET is NOT the same as income tax. GET paid is a deductible business expense on federal Schedule C, reducing federal AGI and therefore Hawaii taxable income. See `hi-sales-tax.md` for GET details.

IRC conformity and depreciation differences

Hawaii generally conforms to the Internal Revenue Code as of a specific date. However, Hawaii has its own depreciation rules and may not conform to all federal provisions. Key differences: - Hawaii does NOT conform to federal bonus depreciation (§168(k)) - Taxpayers must use Hawaii's depreciation schedule (generally straight-line MACRS equivalent)

Tier 1 rules — deterministic

| Rule ID | Rule | |---|---| | HI-IT-1.01 | Hawaii taxable income = Hawaii AGI − deduction − personal exemptions | | HI-IT-1.02 | If taxable income < $100,000, use tax table; if ≥ $100,000, use rate schedule | | HI-IT-1.03 | Personal exemption: $1,144 per taxpayer, spouse (if joint), and each dependent | | HI-IT-1.04 | Social Security benefits are fully excluded from Hawaii income | | HI-IT-1.05 | Filing deadline is April 20 (not April 15) | | HI-IT-1.06 | Automatic 6-month extension to October 20 if estimated tax paid timely | | HI-IT-1.07 | Hawaii does not conform to federal §168(k) bonus depreciation | | HI-IT-1.08 | Hawaii allows credit for taxes paid to other states |

Tier 2 rules — requires judgment

| Rule ID | Rule | Judgment needed | |---|---|---| | HI-IT-2.01 | Standard vs. itemized deduction election | Hawaii allows itemization independently of federal choice | | HI-IT-2.02 | Depreciation conformity analysis | Determine add-back for federal bonus depreciation vs. Hawaii depreciation | | HI-IT-2.03 | Part-year resident allocation | Prorate income for period of Hawaii residency | | HI-IT-2.04 | GET vs. income tax interaction | Ensure GET is properly deducted on Schedule C, not double-counted | | HI-IT-2.05 | Food/excise tax credit | Available to lower-income residents; verify eligibility | | HI-IT-2.06 | Refundable food/excise tax credit | $110 per exemption if federal AGI ≤ $50,000 (single) |

Supplier pattern library

| Pattern on bank statement | Likely meaning | |---|---| | STATE OF HI TAX | Hawaii income tax payment | | HAWAII DOTAX | Hawaii Department of Taxation payment | | HI TAX REFUND | Hawaii income tax refund | | HITAX PMT | Hawaii estimated tax payment |

Form mapping

| Hawaii Form | Federal equivalent / Input | |---|---| | Form N-11, Line 10 | Federal Form 1040, Line 11 (AGI) | | Form N-11, Lines 11–17 | Hawaii modifications (additions/subtractions) | | Form N-11, Line 22 | Hawaii AGI | | Form N-11, Line 24 | Standard or itemized deductions | | Form N-11, Line 25 | Personal exemptions | | Form N-11, Line 26 | Hawaii taxable income | | Form N-11, Line 27 | Tax from table or schedule | | Form N-1 | Quarterly estimated payments | | Form N-210 | Underpayment of estimated tax penalty |

Refusal catalogue

| Refusal ID | Topic | Reason | |---|---|---| | R-HI-01 | Corporate income tax (Form N-30) | Not individual income tax | | R-HI-02 | Transient accommodations tax (TAT) | Separate regime for lodging | | R-HI-03 | Part-year / nonresident returns (Form N-15) | Different form and allocation rules | | R-HI-04 | GET computation details | See hi-sales-tax.md | | R-HI-05 | County surcharge details | Varies by county; requires local analysis | | R-HI-06 | Conveyance tax | Real property transaction tax | | R-HI-07 | Estate tax | Separate regime |