Yes, you can compost shredded paper, but only certain kinds
Shredded paper breaks down in a compost pile, but not all shredded paper belongs there. Plain office paper, newspaper, and cardboard shred easily and decompose without harming your compost. Glossy paper, colored inks, thermal paper (like receipts), and anything with a plastic or wax coating will not break down properly and can introduce chemicals into your finished compost.
The key is knowing what came off your shredder before you dump it in. A pile of mixed office waste from a cross-cut shredder is usually safe. A handful of receipts or magazine pages is not.
Key Takeaways
- Plain white office paper, newspaper, and uncoated cardboard compost without problems and add carbon to your pile.
- Glossy paper, thermal receipts, colored cardstock, and anything with plastic or wax coating should not go in compost.
- Shredded paper takes longer to break down than whole sheets because the pieces dry out faster; keep your pile moist.
- Shredded paper alone will not compost well — mix it with food scraps, grass clippings, or other nitrogen sources to speed decomposition.
What kinds of shredded paper actually break down
Office paper from a standard shredder — white copy paper, printed documents, envelopes without plastic windows — composts without issue. Newspaper, including the colored sections, breaks down fine. Kraft paper bags and plain cardboard (corrugated or flat) are also safe. These materials are mostly cellulose and lignin, the same compounds that make up leaves and wood chips.
The rule is straightforward: if it started as wood pulp and has no coating, it will compost. The ink on office paper and newsprint is water-based and does not prevent decomposition. Shredding actually speeds the process because it increases surface area, though the smaller pieces also dry out faster in an open pile.
Paper you should keep out of compost
Glossy paper — magazines, brochures, some catalogs — has a plastic or clay coating that does not break down. Thermal paper receipts contain chemicals that leach into compost and do not decompose. Colored cardstock, especially bright or neon shades, often uses inks or dyes that are not meant to enter soil. Paper with plastic windows (like some envelopes) or wax coating (like some bakery bags) will leave plastic or wax behind.
Shredded paper from a cross-cut shredder that includes mixed office waste is usually safe if you know what went in. If you are unsure whether a piece is glossy or coated, the safest choice is to leave it out. A small amount of glossy paper mixed in will not ruin a pile, but making it a habit introduces unnecessary chemicals.
How to compost shredded paper without problems
Shredded paper is a carbon source, meaning it adds dry material to your pile. By itself, it decomposes slowly because it lacks the nitrogen that speeds breakdown. Mix shredded paper with nitrogen-rich materials: food scraps, grass clippings, coffee grounds, or manure. A ratio of roughly three parts carbon to one part nitrogen works well, though exact ratios are not critical for home composting.
Keep the pile moist. Shredded paper dries out quickly and will slow decomposition if the pile becomes too dry. Water it as you would a pile of leaves — enough that it feels like a wrung-out sponge. Turn the pile every week or two if you want faster breakdown, or leave it undisturbed for three to six months. Shredded paper in an active, turned pile breaks down in two to three months. In a static pile, expect four to six months.
Do not add shredded paper in large clumps. Spread it throughout the pile so air and moisture reach all the pieces. A thick layer of shredded paper will mat down and create an anaerobic pocket that smells bad and slows decomposition.
Shredded paper in a bin versus an open pile
Shredded paper works in both systems, but the method changes slightly. In a closed bin, shredded paper tends to compact and hold moisture, which can lead to a soggy, slow-decomposing mass. Mix it well with other materials and turn the bin more often — every few days if possible — to keep air moving through. A three-bin system works better than a single enclosed bin because you can move material between bins to aerate it.
In an open pile, shredded paper dries out faster, so you will need to water more often. The upside is that air flows freely, which speeds decomposition. Pile shredded paper in the middle of the heap, surrounded by other materials, rather than on top where it will dry out when ready.
What to do with shredded paper if you do not compost
If your shredded paper includes material you are unsure about, or if you do not have an active compost pile, other options exist. Many communities accept shredded paper in curbside recycling bins — check your local program first, as some do and some do not. Paper shredding services often recycle the material themselves. You can also use shredded paper as mulch around plants (though it will blow around more than wood chips) or as animal bedding if you have chickens or rabbits.
Shredded paper also works as a base layer in a new garden bed, where it will break down over a season and add organic matter to the soil. Spread it four to six inches thick, water it well, and cover it with compost or topsoil before planting.
Frequently Asked Questions
Can I compost shredded paper with ink on it?
Yes. The ink on office paper and newspaper is water-based and does not prevent decomposition. Glossy magazines and colored cardstock are different — they use coatings or dyes that do not break down. Stick to plain office paper and newsprint.
Will shredded paper attract pests to my compost pile?
Shredded paper alone will not attract pests because it has no smell or nutritional value to insects. If your pile attracts rodents or flies, the cause is usually food scraps or meat, not the paper. Keep food scraps buried under other materials and avoid adding meat, dairy, or oils.
How long does shredded paper take to break down?
In an active, turned pile with regular moisture and nitrogen sources, shredded paper breaks down in two to three months. In a static pile, expect four to six months. Whole sheets of paper take longer because they have less surface area exposed to decomposition.
Can I compost paper from a cross-cut shredder?
Yes, if you know what went through it. Cross-cut shredders produce smaller pieces that break down faster than strip-cut shredding. As long as the paper is plain office stock, newspaper, or cardboard, it is safe. If the shredder also processed glossy paper or receipts, those pieces will not decompose.
What if I add too much shredded paper to my pile?
Too much shredded paper will mat down, trap moisture, and slow decomposition. The pile may smell sour or develop mold. Mix it more thoroughly with other materials and turn the pile more often to reintroduce air. If the problem persists, remove some of the paper and add it to a new pile with more nitrogen sources.