What is the sales tax rate in Waipahu, Hawaii?

The combined sales tax rate in Waipahu, Hawaii is 4.500% as of 2026. This includes the Hawaii state rate of 4.000% plus local jurisdiction taxes.

How is the Waipahu sales tax calculated?

Multiply your purchase amount by 4.500% (or 0.00450) to get the tax owed. For example, a $100 purchase incurs $4.50 in sales tax.

What is the Hawaii state sales tax rate?

The base Hawaii state sales tax rate is 4.000%. Local jurisdictions may add additional taxes on top of this rate.

Does Waipahu have a county sales tax?

Waipahu imposes an additional county-level sales tax of 0.500% on top of the state rate.

When was the Waipahu sales tax rate last updated?

The Waipahu sales tax rate was last verified on March 27, 2026. We cross-reference all rates against the official State Department of Revenue data.

Live Data: April 2026

Waipahu, HI Sales Tax Rate 2026

The combined sales tax rate in Waipahu, Hawaii is 4.500%.

Combined Rate 4.500%

State4.000% County0.500%

Waipahu Sales Tax Breakdown

Jurisdiction	Rate
Hawaii State Sales Tax	4.000%
County Sales Tax	0.500%
Total Combined Rate	4.500%

Which County Is Waipahu In?

Waipahu falls within Honolulu, Hawaii. Honolulu imposes a 0.500% county-level sales tax in addition to the Hawaii state base rate.

Waipahu ZIP Codes

The following ZIP codes are mapped to Waipahu for sales tax purposes. All listed codes apply the 4.500% combined rate.

96797

Nearby Tax Rates

Business Nexus in Hawaii

Economic Nexus Threshold

Selling into Hawaii from out of state? Once you exceed $100,000 in annual sales or 200 transactions, you must register and collect Hawaii sales tax.

FAQ: Waipahu Sales Tax

The combined sales tax rate in Waipahu, Hawaii is 4.500% as of 2026.

Multiply your purchase price by 4.500% to find the tax owed. A $500 purchase would include $22.50 in sales tax.

Groceries are generally taxable in Hawaii. Check the official Department of Revenue for specific exemptions.

Vehicle purchases in Waipahu are subject to the 4.500% combined rate, though some states apply different rules for vehicle sales. Verify with the Hawaii Department of Revenue or DMV.

Register for a sales tax permit through the official Hawaii Department of Revenue website. Registration is typically free and required before collecting any sales tax.

Sales Tax Calculator

Using 4.500% rate for Waipahu, HI

Purchase Amount ($)

Tax Amount $0.00

Total with Tax $100.00

Rate applied: 4.500% combined

Official Tax Authority

Hawaii Department of Taxation

Filing Deadline: General Excise Tax (GET) returns due the 20th of the month after the period end. File via Hawaii Tax Online.

Visit Official Portal (808) 587-4242