How often to change the timing belt in a Honda Civic?

In the interest of taking good care of your car, this should be done, in addition to replacing the water pump, around every 100,000 miles or less.

It's not advisable to exceed that mileage, and it's important that you replace the water pump in addition to the timing belt while the engine is apart.

Generally, not a very expensive maintenance task compared to European or American cars. it should be in the neighborhood of $500 or so from a reputable mechanic, although it can be noted that it is only about $100 in parts and the rest is labor overhead costs. So, if you know someone or have a good mechanic or the know-how to do it yourself, that's your best bet. Nonetheless, an important maintenance task to stay on top of if you want your car to continue to run(and well).