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.

Withhold Montana income tax.

North Dakota and Montana have a reciprocal agreement, so the work state stands down once the exemption certificate is on file.

Income tax withheld to

Montana

Graduated, top rate 5.65%

Employee certificate

NDW-R

Reciprocity Exemption from Withholding for Qualifying Minnesota and Montana Residents Working in North Dakota

Unemployment insurance

North Dakota

Localized under factor 1: Localization.

Reciprocal agreement

Yes

North Dakota exempts Montana residents.

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File NDW-R with the employer

Reciprocity is not automatic. Until the employee files NDW-R (Reciprocity Exemption from Withholding for Qualifying Minnesota and Montana Residents Working in North Dakota) you are legally required to withhold North Dakota tax. Keep the signed form on file; it is not sent to the state.

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Withhold Montana income tax instead

Under the agreement the employee is taxed only by their state of residence. You will need a Montana withholding account.

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Employer registrations you will need

Montana — Income tax withholding: Montana Department of Revenue
North Dakota — Unemployment insurance: North Dakota Job Service

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Get the form

NDW-R — North Dakota (official state source)

North Dakota profile Montana profile Full write-up for this pair

Change the inputs

Withholding determination

Answer six questions. The result is a shareable link, so you can paste it into a ticket or an email.

Employee lives inState of residence

Work is performed inWhere the employee physically sits

Employer is based inWhere the work is directed from

Days in the work stateThis calendar year, leave blank if unknown

Wages from work-state daysUS dollars, leave blank if unknown

Arrangement Works remotely rather than at an employer location Remote work is an employer necessity, not employee preference

Run a whole roster instead

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.