As of 2015, the cost for a timing belt replacement on a Honda Accord ranges between $412 and $585. The cost depends on the year of the car, the type of engine and the region of the country where the repair is done.
Regional labor rates and cost of parts affect the price of the job, so an estimation tool like the one at RepairPal.com can provide a cost range. Enter the year, make and model of car, followed by the zip code where the repair will be done. Select "timing belt replacement" and the type of engine from the repair list.