3- Enter the values from your chart above into the website calculator by clicking "Customize." What is your monthly car payment? Part II: Estimate Your Cost of Insurance Now that you have a car you need car insurance! Scroll down to the Average car insurance rates by age and state section of the article and type in your state in the search bar. Then, find the age closest to your own to find your annual rate. 4. Based on your annual rate, how much would you pay monthly for car insurance? (yearly est. Insurance cost / 12 = monthly payment) : Part III: Maintenance and Repairs Your car will need regular maintenance and sometimes even repairs. Let's use Edmunds to determine your monthly C05t of maintenance and repairs for the car you chose in Part I. First, you will need to enter your zip code and Make, Model, Year, and Style of your car. Then, refer to the Maintenance and Repairs sections to determine the information below. 5. Look at the Maintenance row. How much will you pay on maintenance over 5 years? Now calculate how much you will pay on maintenance per month. (value of 5 years maintenance / 60 = monthly maintenance cost) 6. Look at the Repairs row. How much will you pay on repairs over 5 years? Now calculate how much you will pay on repairs per month. (value of 5 years repairs / 60 = monthly repair cost) Part IV: Gas In order to drive your car it needs gas! Refer to the Fuel section to determine the information below. 8. Look at the Fuel row. How much will you pay on gas over 5 years Now calculate how much you will pay on gas per month. (est. Gas price for 5 years / 60 = monthly gas cost)