What is the sales tax in Mililani city? - The sales tax in Mililani city of Hawaii is 4.5% as of 2025. Use the Mililani sales tax calculator to calculate the sales tax for any purchase in Mililani.
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Below is a list of the state sales tax, city sales tax, and county tax rate for Mililani.
| County | State | City | Zip Code | State Tax | City Tax | County Tax | Total Tax |
|---|---|---|---|---|---|---|---|
| Honolulu | Hawaii | Mililani | 96789 | 4% | 0% | 0.5% | 4.5% |