Last updated: May 2026 — Mariana Costa Ferreira, Primario

How We Rate Casinos

At Primário, our mission is to provide honest, comprehensive reviews of online casinos to help Portuguese players find the melhores casinos online. Our rating system is transparent, data-driven, and designed to evaluate every aspect of the gaming experience. This page explains how we assess casinos and assign our ratings.

Our Rating Criteria

We evaluate each casino across six essential categories. Every factor is weighted equally to ensure a fair and balanced overall rating. Here's what we analyze:

Bonuses and Promotions

We assess the quality and fairness of welcome bonuses, ongoing promotions, and loyalty programs. We examine wagering requirements, bonus terms, maximum withdrawal limits, and the variety of promotional offers available to both new and returning players.

Game Selection

We review the breadth and quality of the game library, including:

• Slot machine variety and software providers
• Live dealer games and table game options
• Specialty games and unique offerings
• Game performance and user experience

Payment Methods

We evaluate all available deposit and withdrawal options, including credit cards, e-wallets, bank transfers, and cryptocurrency. We consider transaction speed, fees, minimum/maximum limits, and the security of payment processing.

Customer Support

Quality customer service is crucial. We test support channels—live chat, email, phone, and social media—for responsiveness, professionalism, and problem-solving ability. We also check for multilingual support in Portuguese and other relevant languages.

Licensing and Safety

We verify that casinos hold valid gaming licenses from recognized regulatory authorities. We assess security measures, data protection policies, responsible gaming tools, and compliance with international standards. Player protection is non-negotiable.

Mobile Experience

With mobile gaming increasingly important, we evaluate the casino's app and mobile website for functionality, design, game availability, navigation, and overall performance on smartphones and tablets.

Our Review Process

Our team follows a rigorous methodology when reviewing casinos:

• Registration and Testing: We create accounts and thoroughly test the platform firsthand.
• Bonus Verification: We claim and track bonuses to verify terms and conditions are accurately advertised.
• Payment Testing: We test deposit and withdrawal processes to confirm speed and reliability.
• Game Auditing: We sample games from various providers to assess quality and fairness.
• Support Interaction: We contact support teams with questions and document response times and quality.
• Security Inspection: We verify licenses, SSL encryption, and privacy policies.
• Independent Research: We research player feedback, complaints, and regulatory history.

Understanding Our Rating Scale

We use a 5-star system, with half-star increments, providing precise differentiation:

• 5 Stars: Exceptional casino excelling across all criteria with excellent player protection.
• 4-4.5 Stars: Excellent casinos with minor areas for improvement.
• 3-3.5 Stars: Good casinos meeting basic standards but with notable limitations.
• 2-2.5 Stars: Below-average casinos with significant concerns.
• 1-1.5 Stars: Poor casinos with serious issues; not recommended.

Our Independence Disclaimer

Primário maintains complete editorial independence. We do not accept payments from casinos for favorable reviews, and our ratings are never influenced by sponsorship or advertising partnerships. Our authors, including Mariana Costa Ferreira, commit to impartial assessment based solely on player experience and quality metrics. While we may earn affiliate commissions if players register through our links, this does not affect our review scores. Our sole objective is helping Portuguese players discover trustworthy, high-quality gaming platforms. All reviews are updated regularly to reflect changes in casino operations and new player feedback.