How to Calculate Car Rental Costs: A Clear Example Using a Flat Fee and Per-Mile Rate

When renting a car, understanding the total cost is essential—especially when charged with both a daily flat fee and a per-mile rate. Today, we explore a common scenario used by many car rental companies and break down the total price for a 3-day rental driving 200 miles efficiently.

Understanding the Rental Pricing Structure

Understanding the Context

Most car rental companies use a predictable pricing model: a flat daily fee plus an additional charge per mile driven. For example, one well-known company charges:

  • $30 per day
    - $0.25 per mile

This structure helps customers easily estimate their expenses before signing the rental agreement.

The Customer’s Utilization: 3 Days & 200 Miles

Key Insights

Let’s calculate the total rental cost for a customer who rents the car for 3 days and drives 200 miles.


Step 1: Calculate flat fee charge
Since the daily rate is $30 and the rental is for 3 days:
Flat fee = $30 × 3 = $90


Step 2: Calculate mileage charge
At $0.25 per mile for 200 miles:
Mileage cost = $0.25 × 200 = $50

Final Thoughts


Step 3: Add both costs for total
Total cost = Flat fee + Mileage charge = $90 + $50 = $140


Final Result

The total cost for renting a car for 3 days plus driving 200 miles is $140.


Expert Tip: Always Check for Overages and Discounts
Before confirming your rental, review the agreement for:

  • Hidden fees
    - Mileage limits (some rentals cap miles and charge extra beyond limits)
    - Discounts for returned early or renewing rentals

A transparent understanding of the flat fee plus per-mile charge empowers smarter travel budgeting and helps avoid unexpected charges.