Plumbing
Plumbing flat rate vs hourly pricing
Compare same-job revenue and contribution under a flat quote and an hourly schedule as duration changes.
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
flat contribution=flat fee-direct cost; hourly contribution=callout+rate*billable hours-direct cost; equal-revenue hours=(flat-callout)/rate.
Same job and direct cost under both schedules. Compare contribution before overhead, not tax treatment or legal contract terms.
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
- Flat job quote (selected currency): Matching invoice, quote, statement, bookkeeping record or explicit budget amount for flat job quote. Use the stated period and exclude amounts already counted in another field. Zero means intentionally excluded/not incurred, not unknown.
- Hourly schedule callout fee (selected currency): Matching cost total divided by matching productive/operating hours from invoices, compensation records or logs. Use the field’s exact elapsed/person/machine-hour basis.
- Hourly billing rate (currency/hour): Matching cost total divided by matching productive/operating hours from invoices, compensation records or logs. Use the field’s exact elapsed/person/machine-hour basis.
- Billable job hours (hours): Billable job hours under the supplied schedule, not all paid crew time.
- Same-job direct cost (selected currency): Same-job direct cost for the duration being compared; update if duration changes actual cost.
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: Flat quote contribution is $300.00 for the illustrative inputs below.
Example inputs
- Flat job quote: $500.00
- Hourly schedule callout fee: $100.00
- Hourly billing rate: 100.00 currency/hour
- Billable job hours: 3.00 hours
- Same-job direct cost: $200.00
- Flat quote contribution
- $300.00
- Hourly schedule contribution
- $200.00
- Equal-revenue job duration
- 4.00 hours
These illustrative values are not recommended rates or industry averages. Replace every example input with your own figures.
Use the result well
Compare same-job revenue and contribution under a flat quote and an hourly schedule as duration changes.
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.