Shredded paper is compostable, but only certain types break down well enough to be useful in your pile

Yes, you can compost shredded paper—but not all shredded paper works the same way. Plain office paper, newspaper, and cardboard shred down reliably in a compost pile. Glossy paper, colored inks, and papers with plastic coatings (like receipts or food packaging) should stay out because they either won't decompose or leave behind chemicals you don't want in finished compost.

The real question isn't whether shredded paper composts, but whether it actually helps your pile. Paper is a carbon source—it adds the brown material that balances nitrogen-rich kitchen scraps and grass clippings. But shredded paper works slowly. It can take six months to a year for thin strips to fully break down, especially if your pile stays cool or dry. If you're looking for fast results, shredded paper is not the answer.

Key Takeaways

  • Only plain white office paper, newspaper, and uncoated cardboard should go in your compost; glossy, colored, or coated papers will not break down properly.
  • Shredded paper adds carbon to your pile but decomposes slowly—expect six months to a year for complete breakdown.
  • Wet your shredded paper before adding it to the pile, because dry paper repels moisture and slows decomposition.
  • Mix shredded paper thoroughly with nitrogen-rich materials like food scraps or grass clippings; a pile of paper alone will not compost.
  • Avoid shredded paper from a cross-cut shredder if you want faster results, because smaller pieces take longer to pack down and can mat together.

Which papers are safe to compost

Plain white office paper is the safest choice. It contains no inks, dyes, or coatings, and breaks down into straightforward cellulose that microbes can eat. Newspaper works too—the inks used in most newspapers today are soy-based or mineral-based and pose no real risk to your compost. Cardboard (both plain and printed) is also fine, though it takes longer than paper because it's thicker and denser.

Stay away from glossy paper, which has a plastic-like coating that resists decomposition. Receipts, credit card statements, and thermal paper (the kind that fades over time) contain chemicals that won't break down in a home compost pile. Colored office paper and construction paper often use synthetic dyes that can persist in finished compost. Paper with plastic windows (like some envelopes) or plastic tape should be removed before shredding.

If you're unsure about a specific paper, the safest rule is this: if it's plain, uncoated, and came from an office or newspaper, it's probably fine. If it has a waxy feel, a plastic coating, or bright colors, leave it out.

How to prepare shredded paper for composting

Shredded paper works best when it's wet before it goes into the pile. Dry paper repels water and can form a dense mat that air can't penetrate, which slows decomposition and can create odor problems. Soak your shredded paper in a bucket of water for 10 to 15 minutes, or spray it with a hose until it's damp throughout. Wring out excess water—you want it moist, not dripping.

Tear or break up large clumps before adding the paper to your pile. Even shredded paper can clump together when wet, especially if it came from a cross-cut shredder. Loosening it up helps air flow through and speeds decomposition. Add the moistened paper in layers, alternating with nitrogen-rich materials like food scraps, grass clippings, or manure. A rough ratio is three parts paper to one part green material, though exact proportions matter less than avoiding a pile that's all paper or all scraps.

Why shredded paper decomposes slowly

Paper is mostly cellulose, which microbes can break down—but they do it slowly compared to food scraps or fresh grass. The smaller the pieces, the faster they decompose, but shredded paper is already small, and it still takes months. Cross-cut shredders create tiny confetti-like pieces that actually decompose slower than long strips from a strip shredder, because the small pieces pack down tightly and exclude air.

Temperature and moisture also control the speed. A hot, active pile (above 130°F) will break down shredded paper faster than a cool pile. A dry pile will barely touch it. If your compost pile sits in shade, stays cool, or doesn't get turned regularly, expect the paper to take a year or longer. In a hot, frequently turned pile with plenty of moisture, you might see significant breakdown in four to six months.

Common mistakes when composting paper

The biggest mistake is adding dry shredded paper straight from the shredder without wetting it first. Dry paper floats on top of the pile, sheds moisture, and creates a barrier that keeps water and air from reaching the material below. It looks like it's composting, but it's really just sitting there.

The second mistake is adding too much paper at once. A pile that's mostly paper and very little green material will decompose extremely slowly and may never heat up enough to break down properly. Paper needs nitrogen-rich material to feed the microbes that do the work. If you have a large amount of shredded paper, add it gradually over several weeks, mixing it well each time.

A third mistake is using glossy or coated paper and expecting it to disappear. It won't. Glossy paper can sit in a compost pile for years without breaking down, and it will end up in your finished compost as fragments. Check your paper before shredding, not after.

Alternatives if shredded paper isn't working for you

If your compost pile isn't heating up or breaking down paper quickly, you have other options. Leaves, straw, and wood chips are all carbon sources that decompose faster than paper, especially if you chop them into smaller pieces. Leaves are particularly good because they're free, abundant in fall, and break down in three to six months even in a cool pile.

You can also skip the compost pile entirely and use shredded paper for mulch around plants or as a base layer in a garden bed. It won't break down as fast, but it will suppress weeds and eventually add organic matter to your soil. Some gardeners layer shredded paper directly under mulch in garden beds, where it decomposes over a season or two while blocking weeds.

If you have a lot of paper and limited compost space, consider a local recycling program instead. Most communities accept office paper and newspaper in curbside recycling, which keeps them out of the landfill and frees up room in your compost pile for materials that break down faster.

Frequently Asked Questions

Can I compost paper with ink on it?

Yes, if the ink is soy-based or mineral-based, which is standard for newspapers and most office printers. Avoid glossy paper, receipts, and thermal paper, which use inks or coatings that don't break down in home compost. When in doubt, stick to plain white office paper and newspaper.

How long does shredded paper actually take to compost?

In a hot, actively managed pile, shredded paper can break down in four to six months. In a cool or neglected pile, expect six months to a year or longer. The smaller the pieces and the more nitrogen-rich material you mix in, the faster it goes.

Will shredded paper attract pests to my compost?

Paper itself doesn't attract pests, but a pile that's too wet or too dense can trap moisture and create conditions pests like. Make sure your paper is mixed well with other materials, not compacted into a solid mass, and that your pile has good air flow.

Can I use shredded paper from a cross-cut shredder?

Yes, but it will decompose slower than paper from a strip shredder because the tiny pieces pack down and exclude air. If speed matters, use strip-shredded paper or break up cross-cut shreds before adding them to the pile.

What should I do with shredded paper if my compost pile isn't working?

Use it as mulch in garden beds, layer it under wood chips to suppress weeds, or put it in your community's paper recycling program. Shredded paper has value outside the compost pile—it doesn't have to go there just because it's compostable.