If you're still cranking the dial to "hot" out of habit, it's time for an update. Cold water isn't a compromise. For most loads, it's actually the smarter choice, and the data backs it up.
The Energy Case for Cold
Heating water is the real energy hog in your laundry routine. According to the U.S. Department of Energy, washing your clothes in cold water with a cold water detergent is one of the simplest ways to cut home energy use, since water heating drives the bulk of a washing machine's energy draw. ENERGY STAR estimates that heating water accounts for about 90 percent of the energy a washing machine uses per cycle.
Do the math across a year of laundry and the savings add up fast. ENERGY STAR figures suggest the average household can save around $60 a year just by switching from hot to cold. And it's not only about dollars. A study of clothes washer replacement programs across the Great Lakes region found that shifting wash temperatures, along with other efficiency upgrades, could save tens of millions of dollars in energy and water costs region wide each year.
Even a partial switch helps. Moving from hot to warm cuts energy use roughly in half, so if cold water still feels like a leap, warm is a solid stepping stone.
Better for Your Clothes, Too
Here's the part people don't expect: cold water is gentler on fabric, not just on your utility bill.
Heat is the main culprit behind shrinking and fading. When fibers are exposed to hot water, they expand and soften, which loosens their structure and lets dye molecules escape more easily. That's what leads to dingy colors and clothes that no longer fit quite right. Cold water keeps fibers more compact, helping garments hold both their shape and their color wash after wash.
This is especially true for:
- Dark and bright colors, which are prone to fading and dye transfer in hot water
- Cotton, wool, and other natural fibers, which shrink more readily under heat
- Delicates, since cold water is far less aggressive on sensitive fabrics like silk or cashmere
What About Getting Clothes Clean?
This is where modern detergent formulation matters. Older detergents relied on hot water to activate their cleaning agents, which is where the "hot water gets clothes cleaner" myth came from. Today's cold water formulas are built differently, using enzymes and surfactants designed to dissolve and perform in cool temperatures, so you're not sacrificing clean for the sake of savings.
The Bottom Line
Cold water washing saves energy, saves money, and helps your clothes last longer. It's a rare case where the easier habit is also the better one for your wallet, your wardrobe, and the planet.
Save hot water for the truly greasy, heavily soiled loads, and let cold water handle the rest.
Frequently Asked Questions
Q: Does cold water actually clean clothes well?
A: Yes, when paired with a detergent formulated for cold water. Modern formulas use enzymes and surfactants built to dissolve and perform in cool temperatures, so most everyday loads come out just as clean as they would in hot water.
Q: How much energy does cold water washing save?
A: Water heating accounts for roughly 90 percent of the energy a washing machine uses per cycle, so switching from hot to cold can save the average household around $60 a year in energy costs.
Q: Will cold water shrink my clothes less than hot water?
A: Yes. Heat softens and expands fabric fibers, which is what causes shrinkage. Cold water keeps fibers more compact, so garments are far less likely to shrink or lose their shape.
Q: Does cold water fade colors less than hot water?
A: Yes. Hot water expands fibers and allows dye molecules to escape more easily, which fades colors over time. Cold water holds dye in place better, keeping darks and brights looking newer for longer.
Q: When should I still use hot water?
A: Save hot water for heavily soiled loads, greasy stains, or items that need sanitizing, such as bedding used during an illness. For everything else, cold water is the better default.
Sources
- U.S. Department of Energy, "Laundry": https://www.energy.gov/energysaver/laundry
- ENERGY STAR laundry savings estimates, cited via Gitnux Laundry Statistics 2026: https://gitnux.org/laundry-statistics/
- NRDC, "Saving Water and Energy through Clothes Washer Replacement": https://www.nrdc.org/resources/saving-water-and-energy-through-clothes-washer-replacement
- Knowing Fabric, "Will Cold Water Washing Prevent All Fabric Bleeding?": https://knowingfabric.com/will-cold-water-washing-prevent-fabric-bleeding/