Automotive services
Tire installation service contribution
Calculate installation-only contribution and bay time for a tire service order.
Your inputs
Complete the fields for your selected method. Zero means intentionally zero, not unknown. Currency selection labels amounts; it does not convert exchange rates.
How this calculation works
service contribution = tires × installation charge - technician cost - consumables - other cost; bay hours = elapsed bay minutes/60
Excludes the tire purchase/resale, taxes and disposal fees unless explicitly included once in other costs. Bay elapsed time is not technician person-time. This does not specify tire fitment, torque, inflation or safe installation procedures. Use your own records for the same scope and period. Example figures are illustrative, not industry benchmarks. Results exclude income taxes and any cost you have not entered. Check the result before pricing work or committing resources.
What information do I need?
Use records for the same job, equipment or accounting period. Only the fields for your selected entry method are required. An unknown amount is not zero.
Input definitions and where to find them
- Tires serviced on this order (tires): Use the matching measured quantity, time log, schedule or clearly stated estimate. Zero means intentionally none; an unknown amount is not zero.
- Installation charge per tire excluding tire sale (selected currency): Use a supplier quote, invoice, payroll record or allocated cost for the exact job or period named here. Include this amount only once.
- Elapsed bay time for the complete order (minutes): Use the matching measured quantity, time log, schedule or clearly stated estimate. Zero means intentionally none; an unknown amount is not zero.
- Total technician person-minutes for the order (person-minutes): Use the matching measured quantity, time log, schedule or clearly stated estimate. Zero means intentionally none; an unknown amount is not zero.
- Loaded labor cost per technician hour (selected currency): Use a supplier quote, invoice, payroll record or allocated cost for the exact job or period named here. Include this amount only once.
- Consumables cost per tire (selected currency): Use a supplier quote, invoice, payroll record or allocated cost for the exact job or period named here. Include this amount only once.
- Other allocated cost for this order (selected currency): Use a supplier quote, invoice, payroll record or allocated cost for the exact job or period named here. Include this amount only once.
Use the Where to find this value controls beside the inputs for available work-it-out helpers. Estimates remain your assumptions; a helper does not verify the source figures.
Worked example
Example amounts use US dollars (USD).
Example answer: Installation service contribution is $50.00 for the illustrative inputs below.
Example inputs
- Tires serviced on this order: 4 tires
- Installation charge per tire excluding tire sale: $25.00
- Elapsed bay time for the complete order: 60.00 minutes
- Total technician person-minutes for the order: 60.00 person-minutes
- Loaded labor cost per technician hour: $30.00
- Consumables cost per tire: $3.00
- Other allocated cost for this order: $8.00
- Installation service contribution
- $50.00
- Installation-only sale
- $100.00
- Entered service cost
- $50.00
- Bay occupation
- 1.00 bay-hours
- Contribution per bay-hour
- 50.00 currency/bay-hour
These illustrative values are not recommended rates or industry averages. Replace every example input with your own figures.
Use the result well
Calculate installation-only contribution and bay time for a tire service order. Inputs come from your own records and stated assumptions; no rates or legal limits are looked up.
Keep inputs on the same scope and time basis. Calculations retain precision internally; displayed values generally round to two decimal places, with extra precision for very small values and whole-unit rounding where required. Economic comparisons describe your supplied assumptions and do not guarantee future results.
This tool provides business arithmetic. It does not approve engineering designs, establish legal or tax treatment, select equipment or certify safe operating conditions.