Does laundry detergent expire?
Liquid does — P&G puts an unopened bottle at 12 to 18 months and an opened one at 6 — and powder effectively does not, so long as it never meets moisture.
Updated
- Sealed
- 12–18 months
- Opened
- 6 months
Sealed: 12–18 months Tier 1
P&G's published answer: "Unopened liquid laundry detergent typically has a shelf life of 12 to 18 months, depending on where it is stored." The same page carries a shorter rule of thumb — unopened liquids "are at their most potent for about nine months to a year after you purchase them" — and one clear exception. Powders "do not expire or lose efficacy if stored properly": "when stored in a cool, dry place, your powdered laundry detergent will be good until it's gone."
| Brand | Sealed window |
|---|---|
| P&G, liquid (unopened) | 12–18 months |
| P&G, powder | Doesn't meaningfully expire |
After opening: 6 months Tier 1
"Opened liquid laundry detergent should be used within six months for the best cleaning results." Once the cap is off, the bottle is taking on air and losing water, and P&G names the two things that show up: liquids "can separate and break down over time," and they clump. Clumped detergent still washes, but P&G's warning is that it can clog a dispenser tray.
How to tell it's gone off
- The liquid has separated into layers, or is visibly thicker at the bottom of the bottle than the top.
- Clumps in the liquid — P&G's own flag, and the reason it warns about dispenser trays.
- Powder that has gone "clumpy and hard" has been somewhere damp.
- The "Best Used By" date on the container has passed — P&G calls it "the best indicator of a detergent's efficacy."
- Washing that comes out less clean than usual on the same dose and the same cycle.
If you use it anyway
Degraded performance
Old detergent washes worse, and that is all it does. P&G's own summary is that "expired laundry detergents simply become less effective and fragrant over time, reducing their cleaning power" — you get a load that is not quite clean and you run it again. The one thing worth watching is clumping, which P&G says can clog a dispenser tray; that is a rinse and a rethink, not a repair.
A liquid detergent is enzymes and surfactants suspended in water, and both the suspension and the enzymes are on a clock. P&G describes liquids that "can separate and break down over time, a process accelerated by freezing cold or blistering hot temperatures." Powder has no water in it to separate, so it has only one enemy: moisture, which turns it "clumpy and hard."
Every page here commits to one of four states — Harmless · Degraded performance · Equipment damage · Safety issue. How the verdicts work.
How to store it
P&G attaches the same condition to every one of its figures: "Laundry detergent should be stored in a temperature-stable, cool, dry environment for best results." The two extremes it names are the ones that break a liquid down — "freezing cold or blistering hot" — which rules out an uninsulated garage in most of the country. Powder needs one thing only, and it is absolute: no moisture at all.
Sources
- Tier 1 · manufacturer
Procter & Gamble (Gain) — Does laundry detergent expire?
Checked 2026-08-27. P&G's brand page; it answers for Tide liquid by name as well as for Gain.