Roster mode
Run an entire roster at once.
Paste a CSV, get a determination for every employee, download the result. Nothing is stored; the determination runs on the edge and the response is not logged.
Roster CSV
Columns: name, residence, work_state, employer_state, days, wages, remote. Two-letter state codes. A header row is optional.
This is a determination aid, not advice.
StateSide encodes published state rules and applies them mechanically to the facts you enter. It does not know your
entity structure, your nexus history, your equity compensation, or the dozens of exceptions that turn a clean rule into
a judgement call. Every determination cites the state source it came from — verify against that source, and take
anything consequential to a payroll tax professional before you act on it.