Most paper can compost, but not all paper should

Yes, you can compost many paper products—but the type of paper and what's on it matters. Plain paper, cardboard, and paper bags break down in a compost pile or bin. Paper with coatings, inks, or treatments (like glossy magazines, receipts, or wax-coated containers) may not break down the same way, and some can introduce chemicals you don't want in your finished compost.

The rule is straightforward: if the paper is plain, uncoated, and free of plastic or chemical treatments, it will compost. If it's shiny, has a waxy feel, or came from a product that needed protection from moisture or grease, leave it out.

Key Takeaways

  • Plain paper, cardboard, paper bags, and newspaper break down reliably in compost and add carbon that balances nitrogen-rich materials.
  • Glossy paper, coated cardboard, receipts, and wax-coated containers should not go in compost because coatings prevent breakdown or contain chemicals.
  • Shredding paper before adding it speeds decomposition and prevents it from matting down and blocking air flow in your pile.
  • Paper with colored inks is generally safe to compost, but paper printed with heavy metallic or fluorescent inks should be avoided.

Paper that breaks down in compost

Newspaper is one of the best paper products to compost. It's made from wood pulp with minimal processing, breaks down quickly, and adds carbon to balance nitrogen-rich kitchen scraps. Shred it or tear it into pieces so it doesn't form a dense mat that blocks air and water from moving through the pile.

Cardboard (plain, uncoated boxes) also composts well. Corrugated cardboard from shipping boxes, cereal boxes, and paper towel tubes all work. Remove any tape, labels, or plastic windows first. Tear or cut the cardboard into smaller pieces—a whole box will take months to break down, but strips mixed into the pile decompose in weeks.

Paper bags (kraft paper, grocery bags, lunch bags) compost without issue. They're designed to be sturdy but not chemically treated, so they break down naturally. Shred them or tear them into strips before adding them.

Plain white paper (printer paper, copy paper, office paper) composts, though it's less useful than newspaper or cardboard because it contains fewer nutrients. It does add carbon, so it's worth including if you have it.

Paper products to keep out of compost

Glossy and coated paper should not go in your compost. Magazines, brochures, and catalogs have a plastic-like coating that prevents breakdown. Even if the paper underneath eventually decomposes, the coating sits in your finished compost as fragments. Wax-coated paper (like deli paper, freezer paper, or some takeout containers) has the same problem—the wax coating doesn't break down in a home compost environment.

Receipts are a common mistake. Most thermal receipts (the kind that print when you swipe a card) are coated with chemicals that don't belong in compost. The coating is designed to be heat-sensitive and water-resistant, which means it resists decomposition.

Paper with heavy inks should be avoided. Standard black newspaper ink is fine, but receipts with dark thermal ink, paper with metallic or fluorescent inks, or heavily printed glossy paper can introduce unwanted chemicals. When in doubt, if the paper feels slick or the ink rubs off easily, leave it out.

Laminated paper (like some food packaging or craft paper) has a plastic layer bonded to the paper. It won't compost and will fragment into microplastics in your pile.

How to prepare paper for composting

Shredding or tearing paper before you add it to your compost pile makes a real difference in how fast it breaks down. A whole sheet of newspaper can sit for weeks without decomposing much; shredded newspaper mixes with other materials and breaks down in days.

Tear cardboard into strips roughly 2 to 4 inches wide. For newspaper and paper bags, shred them by hand or run them through a paper shredder if you have one. Smaller pieces have more surface area exposed to moisture and microbes, which speeds decomposition.

Wet the paper as you layer it into your compost. Paper absorbs water slowly, so sprinkling it dry and hoping it gets wet doesn't work well. Add a layer of paper, spray it with water from a hose, then add your next layer of food scraps or yard waste.

Paper as carbon in your compost balance

Paper is a carbon-rich material (also called "brown" material), which means it balances the nitrogen-rich materials (called "green" materials) like food scraps and grass clippings. A healthy compost pile needs both. If your pile smells like ammonia or feels slimy, you have too much nitrogen and not enough carbon—adding shredded paper or cardboard will fix it.

A rough guideline is to aim for about three parts carbon to one part nitrogen by volume. If you're adding a lot of kitchen scraps, you'll need a lot of paper or cardboard to balance it. Newspaper and cardboard are your most efficient carbon sources because they're bulky and break down steadily.

Paper in different composting methods

In a traditional outdoor pile or bin, all the paper types listed above (newspaper, cardboard, paper bags, plain paper) work well. They break down over weeks to months depending on pile temperature and moisture.

In a hot compost system (where you actively manage temperature and moisture), paper breaks down faster because the conditions are more controlled. Shredded paper can decompose in two to four weeks in a well-maintained hot pile.

In a vermicomposting bin (with worms), use only plain, uncoated paper in small amounts. Worms prefer food scraps and aged compost, and too much paper can make the bin too dry. Shred it finely and mix it in gradually.

In a Bokashi bin (fermentation-based), paper is not necessary and not recommended. Bokashi is designed for food scraps and works best without bulky carbon materials.

What to do with paper you can't compost

Glossy magazines, coated cardboard, and receipts should go in your regular recycling or trash, depending on what your local program accepts. Many recycling programs take magazines and cardboard, but not all accept receipts (check your local rules). Wax-coated paper usually goes in trash because the coating contaminates the recycling stream.

If you're unsure whether a paper product is safe to compost, the safest choice is to leave it out. You can always recycle it instead, and you won't risk introducing unwanted chemicals or coatings into your compost.

Frequently Asked Questions

Can I compost paper with colored ink on it?

Standard colored inks used in newspapers and magazines are generally safe to compost. The concern is heavy metallic inks (gold, silver) or fluorescent inks, which should be avoided. If the ink is a normal color and doesn't feel slick or metallic, it's fine to compost.

What about paper towels and napkins?

Yes, plain paper towels and napkins compost well. If they're soiled with food, that's actually helpful—the food adds nitrogen. Avoid paper towels or napkins with bleach or heavy dyes; plain white or light brown versions are best.

Can I compost shredded paper from a paper shredder?

Yes, shredded office paper composts fine. It breaks down faster than whole sheets because it has more surface area. Make sure the paper wasn't coated or printed with heavy inks before shredding it.

Does paper need to be completely broken down before I use the compost?

Small paper fragments in finished compost are harmless, but large pieces of cardboard or newspaper should be mostly decomposed. If you see recognizable paper chunks, let the compost sit longer or break them up by hand before using it on plants.

Can I compost paper that has food residue on it?

Yes. Greasy pizza boxes, paper plates with food scraps, and paper bags that held produce all compost fine. The food adds nitrogen, which actually speeds decomposition. Just make sure the paper itself isn't coated or waxed.