Top United States Tax Rates API Alternatives in 2025

Tax Rate Lookup API

Tax Rate Lookup API is designed to automate the sales tax calculation process for transactions occurring in the United States. This API integrates seamlessly with sales and billing systems, ensuring that businesses can accurately calculate tax rates and generate tax reports.

Key Features and Capabilities

[{"zip_code": "10466", "total_rate": "0.088750", "state_rate": "0.040000", "city_rate": "0.045000", "county_rate": "0.000000", "additional_rate": "0.003750"}]

• zip_code: The zip code for which the tax rate is being queried.
• total_rate: The total sales tax rate applicable to the specified location.
• state_rate: The state sales tax rate.
• city_rate: The city-specific sales tax rate.
• county_rate: The county-specific sales tax rate.
• additional_rate: Any additional taxes that may apply.

Pros and Cons

Ideal Use Cases

USA Sales Tax API

USA Sales Tax API provides accurate tax rates for all U.S. states based on specific zip codes. This API simplifies the process of determining tax rates for sales transactions, making it an essential tool for developers.

Key Features and Capabilities

{
  "rate": 0.1105
}

rate field indicates the sales tax percentage applicable to the specified location. This straightforward response structure allows for easy parsing and integration into existing systems.

Pros and Cons

Ideal Use Cases

Tax Rate USA API

Tax Rate USA API offers accurate and up-to-date tax rates for all U.S. jurisdictions, simplifying tax calculations and ensuring compliance.

Key Features and Capabilities

{"code":200,"error":false,"data":{"state":"CA","zip":"90001","region":"FIRESTONE PARK","combined_rate":"9.500","state_rate":"6.000","county_rate":"0.250","city_rate":"0.000","special_rate":"3.250"}}

• state: The state where the zip code is located.
• zip: The queried zip code.
• region: The specific region within the state.
• combined_rate: The total sales tax rate.
• state_rate: The state sales tax rate.
• county_rate: The county-specific sales tax rate.
• city_rate: The city-specific sales tax rate.
• special_rate: Any additional special taxes that may apply.

Pros and Cons

Ideal Use Cases

Sales Tax by Zip Code US API

Sales Tax by Zip Code US API provides accurate and up-to-date sales tax rates for specific zip codes in the U.S.

Key Features and Capabilities

{"rate_Special":{"text":"0.375% (Special)","value":"0.00375"},"rate_State":{"text":"4% (State)","value":"0.04000"},"rate_City":{"text":"4.5% (City)","value":"0.04500"},"combined":{"text":"8.875% (Combined)","value":"0.08875"},"type":"successful"}

• rate_Special: The special tax rate applicable to the location.
• rate_State: The state sales tax rate.
• rate_City: The city-specific sales tax rate.
• combined: The total combined sales tax rate.
• type: Indicates the success of the request.

Pros and Cons

Ideal Use Cases

Sales Tax Rate Lookup API

Sales Tax Rate Lookup API retrieves accurate and up-to-date sales tax rates for specific addresses, enhancing tax calculations and compliance.

Key Features and Capabilities

{"countries":{"United States":"US","United Kingdom":"GB","Austria":"AT","Australia":"AU","Belgium":"BE","Bulgaria":"BG","Canada":"CA"}}

Pros and Cons

Ideal Use Cases

US Taxes by Zip Code API

US Taxes by Zip Code API is a powerful tool designed to simplify the process of accessing up-to-date tax rates for businesses operating in the United States.

Key Features and Capabilities

{"status":true,"message":"success","data":{"zip_code":501,"state":"NY","state_rate":"0.04000","county_rate":"0.04250","city_rate":"0.00000","special_rate":"0.00375","city":"Brookhaven","population":null}}

• zip_code: The queried zip code.
• state: The state where the zip code is located.
• state_rate: The state sales tax rate.
• county_rate: The county-specific sales tax rate.
• city_rate: The city-specific sales tax rate.
• special_rate: Any additional special taxes that may apply.
• city: The city associated with the zip code.
• population: The population of the city, if available.

Pros and Cons

Ideal Use Cases

US Postal Tax API

US Postal Tax API delivers precise, up-to-date tax data for specific geographic areas within the United States.

Key Features and Capabilities

{"rate": 0.1105}

rate, which corresponds to the tax rate for the specified zip code. This simplicity allows for easy integration into applications.

Pros and Cons

Ideal Use Cases

Conclusion

Tax Rate Lookup API excels in automating sales tax calculations, while the USA Sales Tax API provides reliable tax rates based on zip codes. The Tax Rate USA API and Sales Tax by Zip Code US API offer comprehensive coverage and accuracy, making them ideal for e-commerce platforms and accounting software. The Sales Tax Rate Lookup API and US Taxes by Zip Code API provide real-time access to tax rates, while the US Postal Tax API focuses on precise tax data for specific geographic areas. By evaluating the features and capabilities of each API, developers can choose the best solution to meet their specific needs and ensure compliance with U.S. tax regulations.