Waipahu, Hawaii Sales Tax Calculator (2026)
4.50% total combined rate — includes state and local taxes.
Waipahu businesses collect a 4.5% total GET rate, consistent with Oʻahu’s county surcharge.
Waipahu Sales Tax Calculator
Enter a purchase amount — we’ll calculate the total with Waipahu’s tax rate.
Rate
4.50%
Tax
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Total
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The current combined rate for Waipahu is 4.50%.
Waipahu Sales Tax Breakdown
- State Rate: 4.00%
- City Rate: 0.50%
- County Rate: 0.00%
- Special Rate: 0.00%
- Total: 4.50%
About Waipahu
Once a plantation town, Waipahu applies Oʻahu’s combined 4.5% rate, which supports rail construction and city projects.