Business Calculators
The Basics You Need to Always be Profitable
This series includes 24 key numbers. If you work on getting all of them in the ranges mentioned, your shop should be solidly profitable. There is a fill-in-the-blank form where you can automatically calculate many of these numbers for your shop in our Business Calculators area available to Premium Members.
Twenty-three different forms where you enter numbers from your shop. Key management numbers are then automatically calculated, including Gross Profits, Effective Labor Rate, and Average RO.
Unlock all 24Parts Cost
For this key number, we want to know what percent of total sales is spent on parts.
Worked example
Last month Acme Auto had total sales of $50,000.
Total cost of parts that were sold during the month was $11,000.
$11,000 ÷ $50,000 = 0.22
So, our key number is 22%
When looking at this number for a typical independent shop which is solidly profitable, this number will normally run between 21% and 24%.
Definitions
Cost of parts:
Includes the cost of all types of parts, shop supplies and tires when looking at a typical independent shop where tire sales are less than 5% of total sales. (Tire shops and others selling many tires should deduct tire sales before doing the calculation.)
Total sales:
Includes sales of all parts, shop supplies, labor, sublet, and tires.
Why Auto Shop Owners Need Business Calculators
Whether you're tracking your shop's labor rate, monitoring gross profit, or measuring how your monthly sales compare to the same period last year, having access to these calculations removes the guesswork from shop management. Instead of estimating, you get clarity, which leads to better decisions.
What Makes These Calculators Different
Our calculators are specifically designed for auto repair shops and service centers. Each calculator targets a metric that directly affects your bottom line, from new-customer rate and oil-change capture rate to gross profit per sold hour and true labor rate.
These aren't vanity metrics. They're the KPIs that profitable shop owners track consistently to stay ahead of rising costs, efficiency challenges for technicians, and shifting customer demand.
Benchmark Your Shop Against Industry Standards
It's not enough to know your parts' gross profit percentage; you need to know whether it's within the range of a healthy, thriving shop. These calculators provide a benchmark, helping you identify gaps and set realistic, data-backed goals.
Ready to put these calculators to work for your shop? Join over 15,000 auto shop owners and managers in the Automotive Management Network community. Become a Premium Member to unlock full access to all of our business calculators and hundreds of additional management resources.
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