Typically, the cost of a replacement drain pump can range from $50 to $150 or more. However, keep in mind that this is just the cost of the part itself. If you hire a professional technician to perform the replacement, there will be additional labor charges. Labor costs can vary significantly based on the technician's hourly rate and the complexity of the repair.
To get an accurate estimate, I recommend reaching out to local appliance repair shops or contacting the manufacturer of your dishwasher for a quote. They will be able to provide you with the most up-to-date and specific pricing information for your situation.