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What are the headers for the Zip+4 rate file?


You want to know what data is included in the five column rate file that includes information for the 9 digit zip codes in your rate files.



Avalara Rate File


  • The Zip+4 Add On File includes all zip codes which cross county lines
    • Use this file to determine which county the 9 digit zip code falls in
    • The file includes only zip codes that cross county lines and only states that have sales tax below state level.
    • Headers of TAXZIP4 file:
Zip Code (5 digit)

Plus 4 Portion Of Zip Code

(Low Range)

Plus 4 Portion Of Zip Code

(High Range)

State Code County Name





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