The sample covers a water heater replacement: a service call fee, labor, a 50-gallon tank with fittings, and haul-away of the old unit. For emergency calls, add an after-hours line or swap in your emergency rate. If you offer flat-rate pricing from a price book, replace the hourly labor with the flat task price and keep parts on separate lines for transparency.
Invoicing tips for plumbers
- Record make, model and serial numbers for installed water heaters, fixtures and pumps so customers have warranty details on file.
- Bill after-hours, weekend and holiday callouts at a separate rate and note the arrival time.
- Show disposal fees for old fixtures and water heaters as their own line.
- If you use flat-rate pricing, still itemize parts so customers can see what was replaced.
Typical line items
- Service call fee
- Labor: remove and install water heater (hourly)
- 50-gallon gas water heater with fittings and valves
- Haul-away and disposal of old unit
Rates shown are examples only — edit them to match your pricing.
FAQ
Should plumbers use flat-rate or hourly pricing?
Flat-rate pricing from a price book is popular because customers know the cost before work starts and you are rewarded for working efficiently. Hourly billing suits unpredictable diagnostic work like tracing hidden leaks. Many plumbers quote a flat price for standard jobs and switch to hourly when the scope can't be known in advance.
How do I invoice an emergency plumbing call?
Note the call time and arrival time, apply your emergency or after-hours rate, and list the work done to stop the immediate problem separately from any follow-up repair. If a permanent fix happens on a later visit at standard rates, issue a separate invoice so the customer clearly sees the difference between the two.
Do I need to itemize parts on a plumbing invoice?
It is good practice. Listing each part, such as valves, fittings, cartridges or the water heater itself, shows customers what they paid for and supports warranty claims. You can bill parts at cost plus your standard markup, but avoid lumping everything into a single materials line on larger jobs.
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