Quick Picks: Best Compostable Trash Bags

Switching to compostable trash bags is one of the simplest upgrades you can make to a zero-waste kitchen routine. Unlike conventional plastic bags that persist in landfills for hundreds of years, certified compostable bags are designed to break down alongside your food scraps in a compost pile or municipal organics program, leaving behind no toxic residue. But not every bag marketed as “biodegradable” or “eco-friendly” actually meets compostability standards — and some will fall apart in your bin before you even make it to the curb.

The key standard to look for is ASTM D6400 or EN 13432 certification, which requires that a bag disintegrate into fragments smaller than 2mm within 84 days in industrial composting conditions, with no ecotoxic residue. Home compostable certification (like OK Compost HOME or BPI Home) is more stringent, requiring the same breakdown at lower temperatures typical of backyard piles. Understanding which certification applies to your composting method — home pile versus municipal curbside organics program — is crucial for making a bag that will actually compost rather than just sitting in your bin looking green.

Quick Picks: Best Compostable Trash Bags

Why Trust Our Picks

Our evaluation of compostable trash bags focused on certification legitimacy, material composition, performance under real kitchen conditions (wet food scraps, grease, sharp items), breakdown speed in both industrial and home composting environments, and cost-per-bag analysis across multiple size categories. We cross-referenced manufacturer claims against BPI, ASTM, and EN 13432 certification databases and consulted user feedback from households running curbside organics programs as well as home composters. Only bags with verifiable third-party certification and consistent durability reports made this list.

Best Compostable Trash Bags: Reviews

1. BioBag Compostable Bags

BioBag has been in the compostable bag business since 1959 — longer than most competitors have existed — and their Compostable Bags represent decades of refinement in plant-based material science. The bags are made from Mater-Bi, a proprietary bioplastic resin derived from vegetable oils and plant starches, and notably does not use genetically modified corn starch as the base material, which is a common concern among sustainability-minded consumers. The BPI (Biodegradable Products Institute) certification and OK Compost certification together cover both North American and European composting standards, making these bags accepted in virtually every municipal organics program across the country. In real-world use, BioBag holds up impressively well. The 3-gallon kitchen counter bags handle a week’s worth of mixed food scraps — including citrus peels, meat trim, eggshells, and wet vegetable matter — without leaking or tearing under normal handling. The 13-gallon versions work well as kitchen bin liners when lined with a small BioBag for easy transport to an outdoor pile. One important note: like all compostable bags, BioBag should not be stored in hot, humid conditions for extended periods because the material can begin to soften and cling. Keep unused bags in a cool, dry drawer or cabinet.

• Pros: Non-GMO Mater-Bi material, dual BPI and OK Compost certification, accepted in most municipal programs, flexible and durable for daily kitchen use, available in 3, 5, and 13-gallon sizes
• Cons: Pricier per bag than conventional plastic, sensitive to heat and humidity in storage, may soften faster in a very warm kitchen

2. If You Care Certified Compostable Trash Bags

If You Care positions itself at the premium end of the certified compostable market, and it earns that position through noticeably thicker construction compared to most competitors. These bags carry both ASTM D6400 and EN 13432 certifications, the two most widely recognized international composting standards, meaning they are accepted in the broadest range of municipal and commercial composting facilities. The extra wall thickness pays off when the bag is filled with heavy, wet scraps — think watermelon rinds, soup residue, or bulk coffee grounds — that would cause thinner bags to split or leak. The 13-gallon kitchen bags measure approximately 24 x 30 inches and hold a generous load before the bag itself begins to strain. If You Care also produces 3-gallon countertop bags that fit the most popular small kitchen pails and food scrap collectors perfectly. Because they are thicker, they decompose slightly more slowly than thinner bags in a home compost pile, but they fully break down within the ASTM-required 84 days in industrial conditions. They are the go-to choice for households using a curbside organics program that processes bags at a commercial composting facility with controlled temperature and moisture.

• Pros: Extra-thick construction resists tearing under heavy loads, dual ASTM D6400 and EN 13432 certified, multiple size options, accepted universally in municipal programs
• Cons: Highest per-bag price of the three, slightly slower to break down in home compost piles, thicker walls mean more material per bag

3. Green Paper Products 100% Compostable Trash Bags

Green Paper Products delivers ASTM D6400-certified compostability at the most accessible price point of any product on this list, making it an ideal choice for households that are committed to compostable bags but use high volumes — large families, households with food-heavy composting routines, or offices setting up a green waste program. The bags are made from a corn starch-based bioplastic that meets the composting standard and breaks down in commercial composting conditions within the required timeframe. In practical use, the thinner construction compared to BioBag and If You Care means these bags are better suited to light-to-moderate loads: fruit and vegetable scraps, paper towels, small food packaging, and yard trimmings. They are not the best choice for very heavy, wet loads like fish scraps or large quantities of liquid-heavy food waste. Available in 13-gallon and yard waste sizes, they cover the most common household applications well. For composters who line their outdoor pile with bags rather than using municipal pickup, these bags break down quickly in pile conditions and are an affordable way to keep the pile tidy during material addition.

• Pros: Lowest cost per bag, ASTM D6400 certified, good for light to moderate kitchen loads, breaks down quickly in compost conditions
• Cons: Thinner than premium options — not ideal for heavy wet loads, corn starch base may raise GMO concerns for some buyers, fewer size options

Buyer’s Guide: How to Choose Compostable Trash Bags

Industrial vs. Home Compostable: This distinction is critical and widely misunderstood. Most ASTM D6400 and EN 13432 certified bags are designed for industrial composting — the high-heat, high-moisture conditions found in commercial composting facilities that process municipal organics. They will break down in a well-managed home compost pile too, but more slowly. If you exclusively home compost and want bags that fully break down in a backyard pile within a typical composting season, look specifically for “OK Compost HOME” or “BPI Home” certification. Bags without that home-specific certification may still be useful for lining your kitchen scrap collection pail before transferring scraps to an outdoor pile — just remove the bag and leave it out if your pile is a cold, passive system.

Bag Thickness and Load Type: Compostable bags are generally thinner than conventional plastic because the plant-based materials used have different tensile properties. Matching bag thickness to your load type will prevent frustrating splits and spills. For dry, light loads (paper, lightweight food scraps, small items), a standard-thickness bag works fine. For wet, heavy loads (citrus, meat trimmings, large quantities of vegetable matter), choose a thicker-walled option like If You Care. Avoid overfilling any compostable bag — the material is stronger under compression than tension.

Storage Conditions: All plant-based compostable bags begin to break down when exposed to heat, moisture, and oxygen — that’s exactly what makes them compostable. Store unused bags in a cool, dry location away from direct sunlight and humidity. Do not store them under the sink or in a warm garage. Most manufacturers recommend using bags within 18 months of purchase and keeping the package sealed between uses.

Municipal Program Acceptance: Before buying in bulk, confirm that your local curbside organics program accepts compostable bags. Some programs accept only BPI-certified bags, others accept any ASTM D6400 bag, and some facilities require you to empty bags and place scraps loose in the bin. A quick call to your waste hauler or a check of your city’s waste management website will save you a frustrating experience of bagged scraps being rejected at the curb.

FAQ

Will compostable bags break down in a landfill? No — compostable bags require oxygen, moisture, and microbial activity to break down, none of which are present in meaningful quantities in a sealed landfill. If your compostable bags end up in landfill, they will degrade significantly more slowly than in a compost setting. Compostable bags are only an environmental win when they actually reach a composting system.

Can I use compostable bags for non-food waste? Yes, but it is not the most efficient use. Compostable bags work fine for mixed household trash, paper waste, or office recycling collection — but since non-compostable contents will likely go to landfill anyway, you lose the environmental benefit. Use compostable bags where the entire contents can go to compost: food scraps, compostable packaging, yard waste, and paper towels.

How long will a compostable bag hold wet food scraps before it starts breaking down? Under normal kitchen conditions (room temperature, not soaking in liquid), a quality compostable bag should hold wet food scraps for 5–10 days without issue. Prolonged exposure to water or very hot conditions will accelerate softening. Empty your kitchen pail every 3–5 days as a general practice to keep the bag intact through transfer.

Final Verdict

BioBag Compostable Bags is our top recommendation for households that want the most thoroughly certified, environmentally vetted option with strong real-world performance and non-GMO materials. For heavy-duty kitchen loads and participation in a curbside organics program, If You Care Certified Compostable Trash Bags offers superior strength and the broadest certification coverage available. Budget-focused households who compost regularly and need a high-volume supply of certified bags for lighter loads will find Green Paper Products 100% Compostable Trash Bags to be an excellent value. All three are genuine improvements over conventional plastic bags and represent responsible choices for anyone serious about reducing landfill waste.