There are so many ways to save money while doing laundry. I have mentioned using "small" amounts for all loads, even full loads. I gave the suggestion of how to make your own laundry detergent and washing your laundry using cold water. To further your savings, use a "short" or "quick" wash cycle.
On my washing machine, the regular setting runs for 50 minutes. If I use the short wash setting, my laundry only runs for 30 minutes. Using a shorter time reduces the amount of energy your washer needs and cuts back on the amount of water you are using. Trust me, your clothes will come out just as clean. I have been doing this for years, and I found no difference than if I were to have used the regular setting.
