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Format Employer Identification Numbers (EINs)

format_ein.Rd

Converts between numeric EINs (e.g., "123456789") and standardized ID-style EINs (e.g., "EIN-12-3456789").

This utility ensures EINs are properly zero-padded to nine digits and formatted consistently for joining or matching across datasets.

Usage

format_ein(x, to = "id")

Arguments

x

Character or numeric vector of EINs. Can contain mixed formats (e.g., "123456789", "EIN-12-3456789", or "12-3456789").

to

Character. Direction of formatting:

"id"

Convert to standardized EIN ID format ("EIN-XX-XXXXXXX").

"n"

Convert to numeric-only form (digits only, no punctuation or prefix).

Value

A character vector of reformatted EINs.

Examples

# Convert to EIN ID format
format_ein(c("123456789", "987654321"), to = "id")
#> [1] "EIN-12-3456789" "EIN-98-7654321"
#> [1] "EIN-12-3456789" "EIN-98-7654321"

# Convert back to numeric-only
format_ein(c("EIN-12-3456789", "EIN-98-7654321"), to = "n")
#> [1] "123456789" "987654321"
#> [1] "123456789" "987654321"