According to the Family Handyman website, the cost of repairing a leaky washer without the help of a service technician is between $20 and $100, as of 2015. The actual cost varies greatly depending on the cause of the leak.
Washers leak for a number of reasons, including faulty pumps, leaky hoses and worn-out tub fittings. Simple repairs eliminate the need to call a plumber, which costs homeowners between $150 and $450 for every visit, according to the Home Advisor website. Owners that attempt repairs themselves should research the repair steps thoroughly before beginning and have all necessary tools on hand. If the washing machine is under warranty, the owner may avoid the cost of repair entirely by requesting the manufacturer send a service technician to inspect the leak.