OAHU Honolulu's Trusted Source for
BUSINESS TAX PREPARATION, FINANCIAL PLANNING, BUSINESS PLANNING, COMPREHENSIVE TAX PLANNING
● Tax Planning ●
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1441 Kapiolani Boulevard Suite 912
Honolulu, HI 96814

Diamond Head Tax Group - Oahu Tax Preparation and Filing in
the State of Hawaii serves Businesses.
Federal Tax Bracket 2025 Update: What Oahu Hawaii Taxpayers Should Know
At Diamond Head Tax Group Oahu, we stay closely informed about federal tax updates that may affect Oahu residents, local businesses, and investors. For the 2025 tax year, the IRS announced an approximate 2.8% inflation adjustment to federal tax brackets.
This update slightly increases the income thresholds for each bracket, which may allow taxpayers to keep more of their income as inflation continues to impact everyday expenses across Hawaii. Let’s take a closer look at how these updates may influence tax planning for Oahu households and businesses.
Key Tax Bracket Changes for 2025

For the 2025 tax year, the income thresholds tied to each federal tax bracket will increase. The starting point for the highest federal income tax bracket (37%) will rise to $751,600 for married couples filing jointly, while single filers will see the top bracket begin at $626,350.
For many Oahu taxpayers, these adjustments mean a greater portion of income may remain within lower tax brackets, which can slightly reduce overall federal tax liability and open the door for more strategic tax planning.
Updated Standard Deduction
The standard deduction, one of the most widely used tax benefits, will also see an increase for the 2025 tax year.
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Single filers: $15,000 (up from $14,600)
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Married filing jointly: $30,000 (up from $29,200)
For many individuals and families throughout Honolulu, Kailua, Kaneohe, and greater Oahu, this increase may help reduce taxable income, particularly for taxpayers who choose the standard deduction instead of itemizing their deductions.

Capital Gains and Estate Tax Threshold Updates
Inflation adjustments are also impacting capital gains thresholds and estate tax limits for the 2025 tax year. The 0% capital gains tax rate now applies to:
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Single filers: taxable income up to $48,350
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Married couples filing jointly: taxable income up to $96,700
These updates can benefit Oahu investors and property owners who manage investment portfolios, real estate assets, or capital gains. In addition, the federal estate tax exemption will increase to $13.99 million in 2025, up from $13.61 million in 2024.
For individuals engaged in estate planning or wealth transfer strategies, this change provides added flexibility when structuring estates and safeguarding assets. With possible tax law adjustments on the horizon, now is a good time for Oahu families to review their estate and tax planning strategies.
What Could Change in 2026?
The Tax Cuts and Jobs Act (TCJA) is currently set to expire at the end of 2025, which may result in notable changes to tax laws starting in 2026. If Congress does not extend certain provisions, tax rates, deductions, and exemption levels could return to their pre-2017 structure. These potential changes may impact many taxpayers, making the current tax years particularly important for thoughtful tax planning and financial preparation.

Plan Ahead with Diamond Head Tax Group OAHU
At Diamond Head Tax Group Oahu, our experienced tax professionals help Oahu residents, entrepreneurs, and investors navigate changing tax laws with confidence. Whether you need tax preparation, tax planning, investment income strategies, or retirement tax planning, our team is here to guide you in making informed financial decisions.
Whether you need help with:
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Individual Tax Preparation
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Business Tax Filing (LLC, S-Corp, C-Corp)
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Tax Planning Strategies
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Investment and Capital Gains Tax Guidance
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Estate and Wealth Tax Planning
Reach out to Diamond Head Tax Group Oahu today to review your 2025 tax strategy and see how proactive planning can help reduce tax liability while strengthening your long-term financial outlook in Hawaii.
BUSINESS TAX FILING
We are well-versed in business tax and accounting and can work with any business including partnerships,
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Diamond Head Tax Group is a Honolulu locally owned and operated business that serves individuals and small and medium business. Services include tax planning and preparation, charitable tax planning strategies, social security taxation reduction, sales tax preparation, small business strategy development, QuickBooks setup, and payroll services. Clients appreciate Diamond Head Tax Group's help, advice, flexible hours, and thoroughness.
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