Determination engine

Which state do you actually withhold in?

Reciprocity, convenience-of-the-employer, nonresident thresholds and unemployment localization, applied together to one employee's facts. Every answer cites the state source it came from.

No state income tax withholding applies.
Neither jurisdiction imposes a wage income tax on this arrangement.
Income tax withheld to
None
No wage income tax applies to this combination.
Employee certificate
None required
No state withholding allowance certificate applies.
Unemployment insurance
Georgia
Localized under factor 1: Localization.
Reciprocal agreement
No
Georgia has no reciprocal agreements.
Below the Georgia nonresident threshold
Georgia applies a de minimis test of 23 days or $5,000 of in-state wages before nonresident withholding begins. Per the Georgia Employer's Withholding Tax Guide, employers must withhold from a nonresident employee if more than 5% of the employee's total earned income is attributable to Georgia OR more than $5,000 of wages is attributable to Georgia. O.C.G.A. Sec. 48-7-1(11)(A) separately sets a 23-day-in-Georgia threshold for nonresident taxability. Treat 23 days OR $5,000 OR 5%-of-income as the trigger; the 5% percentage test has no dollar equivalent and must be computed separately.
!
Track this, because it flips mid-year
Once the threshold is crossed, most states require withholding on all in-state wages for the year, not just the excess. Set an alert well before the limit.
Employer registrations you will need
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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.