How Colombian Coffee Beans Are Graded and Classified

If you’ve ever wondered why some Colombian coffee costs more or tastes noticeably better, the answer often lies in how the beans were classified before export. Colombia has multiple official and unofficial systems for sorting coffee beans by size, quality, and origin — all of which affect flavor, price, and roast potential.

In short, Colombian coffee beans are graded by size (like Supremo or Excelso), defect count (from 72 down to just 0 for top grades), region (such as Huila or Tolima), and certification (organic, fair trade, etc.). The highest ‘specialty’ grades allow zero primary defects and fewer than five secondary flaws per 500g.

Legal Grading Standards in Colombia

The Colombian National Coffee Committee sets strict rules for exported beans. Only high-quality lots may leave the country, grouped into commercial and specialty tiers. Commercial grades include Maragogype, Supremo, Excelso, and UGQ (‘Usual Good Quality’). Specialty grades are AA, A, and Special Grade. Each classification depends on bean size and screening, with further quality distinctions based on defect limits.

Bean Size Categories Explained

Colombian beans are also categorized by physical screen size, measured in mesh or ‘mesh’ (a holdover from older sizing systems):

• Maragogype: A rare, large-bean mutation with limited production.
• Supremo: Beans under 17 mesh but over 14 mesh — no more than 5% below 14 mesh.
• Supremo screen 18+: At least 95% of beans pass through 14 mesh but not 18 mesh.
• Excelso Extra: Mostly pass 14 mesh but not 16 mesh — no more than 5% under 14 mesh but over 12 mesh.
• Excelso EP (European Preparation): Up to 2.5% (sometimes adjusted to 5% or 8%) of beans can be under 12 mesh but not 15 mesh.
• U.G.Q.: General ‘Usual Good Quality’ — no more than 1.5% of beans under 12 mesh but over 14 mesh.

Defect-Based Grading: How Many Flaws Are Allowed?

Quality is also determined by the number and severity of defects found in a 500g sample. Defects fall into two categories:

• Primary (1st level): Critical flaws like black, sour, or moldy beans that directly harm cup quality.
• Secondary (2nd level): Visual issues such as broken, insect-damaged, immature, or misshapen beans.

Different entities allow different totals:

• Private exporters: Up to 72 total defects (max 12 primary, 60 secondary).
• National Coffee Committee: Up to 42 total defects (max 8 primary, 35 secondary).

Note: One primary defect counts as ten secondary ones.

For specialty grades, the thresholds are stricter:

• Grade AA: Zero primary defects, fewer than 5 secondary flaws per 500g.
• Grade A: Fewer than 3 primary and 8 secondary defects per 500g.
• Grade (Special Grade): Up to 8 primary and 35 secondary defects per 500g.

Regional Origins and Harvest Seasons

Colombia’s coffee is traditionally associated with cities like Armenia or Medellín, but modern marketing highlights specific regions. Key growing areas now include Huila, Tolima, Popayán, Bucaramanga, Nariño, and Medellín. These regions sit mainly within the Andes mountains, where altitude and microclimates shape distinct cup profiles.

Coffee is harvested during two main seasons:

• Main Crop: Varies by region — e.g., Bucaramanga (Oct–Dec), Popayán (May–June).
• Mitaca (fly crop): A smaller, secondary harvest.

Main crop coffees are typically of higher quality due to fuller ripening.

Frequently Asked Questions

What are the main ways Colombian coffee beans are graded?

Colombian coffee beans are graded by legal standards (commercial vs specialty), bean size (like Supremo, Excelso, Maragogype), defect counts (primary and secondary flaws per 500g), and regional origin. Specialty grades allow zero primary defects and very few secondary ones.

What is the difference between Supremo and Excelso coffee beans?

Supremo beans are larger, with at least 95% passing through 14 mesh but not 17 mesh (or 18+ for Supremo screen 18+), and no more than 5% under 14 mesh. Excelso beans are slightly smaller, with up to 5% allowed under 14 mesh but over 12 mesh for Extra, or adjusted limits for EP.

How many defects are allowed in specialty-grade Colombian coffee?

Specialty-grade Colombian coffee allows zero primary defects for Grade AA, and fewer than 5 secondary defects per 500g. Grade A allows up to 3 primary and 8 secondary defects, while Special Grade permits up to 8 primary and 35 secondary defects.

Which regions in Colombia produce the best coffee?

Top Colombian coffee regions include Huila, Tolima, Popayán, Bucaramanga, Nariño, and Medellín. Huila, especially, is known for high-scoring coffees and frequent competition winners.

Does Colombia have a main and a secondary harvest season?

Yes. The main harvest (Main Crop) generally yields better quality and occurs at different times across regions — for example, May–June in Popayán or October–December in Bucaramanga. A smaller Mitaca (fly) crop follows.

Recommended FrontStreet Coffee Beans from Colombia

FrontStreet Coffee’s FrontStreet Colombian Huila is a standout single origin grown above 1500 meters, offering chocolate, caramel, and citrus notes through a washed process. For fruit-forward profiles, try their Sidra or Geisha-inspired lots, which showcase intense florals and juicy acidity. These beans highlight the diversity of Colombia’s premium regions and are ideal for exploring specialty-grade flavors. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.