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Immigration Horizons
Resources

Guides and official immigration resources

Our in-depth guides to each category, alongside links to the authoritative government sources. When it comes to processing times, fees, and current policy, the official pages are always the source of truth — and we link you straight to them.

Our guides

In-depth category guides

Each of these is a full, regularly considered resource — eligibility, evidence strategy, required documents, and common mistakes.

National Interest Waiver

EB-2 NIW guide

For advanced-degree professionals or individuals of exceptional ability whose work is in the national interest of the United States.

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Extraordinary Ability

EB-1A guide

For individuals with extraordinary ability in the sciences, arts, education, business, or athletics who can demonstrate sustained national or international acclaim.

Read the guide
Outstanding Professor or Researcher

EB-1B guide

For outstanding professors and researchers recognized internationally for their academic achievements, typically sponsored by a US employer.

Read the guide
Multinational Manager or Executive

EB-1C guide

For multinational executives and managers transferring to a US branch, parent, subsidiary, or affiliate of their overseas employer.

Read the guide
Extraordinary Ability or Achievement

O-1 Visa guide

For individuals with extraordinary ability or a demonstrated record of extraordinary achievement seeking temporary work authorization in their field.

Read the guide

Support service guides

Primary sources

Official immigration resources

Authoritative government pages. For processing times, fees, and current policy, always rely on these rather than on any figure quoted second-hand.

USCIS — Green Card for Employment-Based ImmigrantsThe official overview of the employment-based preference categories and how they fit together.USCIS — EB-1 First PreferenceExtraordinary ability (EB-1A), outstanding professors and researchers (EB-1B), and multinational managers and executives (EB-1C).USCIS — EB-2 Second PreferenceAdvanced-degree professionals, exceptional ability, and the National Interest Waiver.Matter of Dhanasar (AAO 2016)The precedent decision that sets the three-prong framework USCIS applies to National Interest Waiver petitions.USCIS — Check Case Processing TimesThe authoritative, always-current source for how long cases are taking at each service centre. Always use this rather than any figure quoted elsewhere.Department of State — Visa BulletinMonthly priority-date availability by category and country of chargeability, which determines when a case can move forward.USCIS — Form I-140The Immigrant Petition for Alien Worker, used for EB-1 and EB-2 filings. Always check the current edition and fee before filing.USCIS Policy ManualThe agency's own guidance on how officers evaluate petitions, including the evidentiary standards for each category.

More guides on the way

We're building out a library of profession-specific and topic-specific articles. In the meantime, the category guides above cover the essentials in depth.

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