What markup should HVAC and plumbing companies use on materials?

50% to 100% on general materials, producing a 33% to 50% margin, and 25% to 50% on major equipment where dollar values are high and customers can compare prices online. The markup covers sourcing, stocking, delivery and warranty, not just the part itself.

Is flat-rate pricing better than hourly billing?

For service and repair work, generally yes. It gives the customer price certainty, removes arguments about duration, and rewards efficiency instead of penalising it. Hourly billing still makes sense for genuinely open-ended work such as complex diagnostics or large installations where scope cannot be defined up front.

How do I build a flat-rate price?

Start from your fully loaded cost per billable hour — wage plus payroll burden, non-billable time, vehicle costs and overhead allocation — then multiply by the task's expected duration, add materials with markup, and add target profit. The technician's wage is typically less than 20% of the final price.

Should I show materials separately on a flat-rate invoice?

No. Flat rate prices the completed task, and itemising marked-up parts invites the customer to compare each line against retail prices. Present the task price and what it includes. Keep detailed material costing internal, where you need it for margin tracking.

How often should I update my flat-rate price book?

At least twice a year, and immediately after a significant supplier price increase. Also revisit it whenever wages or overhead change. A book that is 18 months old in a rising-cost market is pricing today's work with last year's costs.

Markup Calculator for HVAC & Plumbing

The mechanical trades made a structural shift away from time-and-materials billing toward flat-rate pricing, and the reason is margin. Hourly billing punishes the efficient technician, invites arguments about how long a job should take, and gives the customer no price certainty. Flat rate prices the task, so speed becomes profit rather than lost revenue.

Use the calculator for materials markup on any individual item. Then read the flat-rate section — because for most service work, the markup on a part matters far less than whether the task price covers your fully loaded cost of putting a van on the road.

Cost per unit

Currency

Markup

Percentage added on top of your cost.

Markup to margin reference

Markup	Margin
10%	9.1%
20%	16.7%
25%	20.0%
33.3%	25.0%
50%	33.3%
75%	42.9%
100%	50.0%
150%	60.0%
200%	66.7%

Selling price

$297.00

$180.00 cost plus 65.0% markup.

Profit per unit: $117.00
Markup applied: 65.00%
Actual gross margin: 39.39%

Markup is applied to direct cost only. Make sure yours is large enough to cover overheads such as rent and salaries as well as leaving profit.

Starting values are set for a typical hvac & plumbing scenario — change any field to match yours. Need the plain version? Markup Calculator.

What a flat-rate price has to cover

A flat rate is built from the fully loaded cost of the visit, not from the technician's wage. The gap between the two is where trades businesses either make money or quietly fail.

Building a flat-rate price for a two-hour task
Component	Example	Notes
Technician wage	$32/hr → $64	Base pay for billable time
Payroll burden	$19	Taxes, workers' comp, benefits — commonly 25% to 35%
Non-billable time	$28	Drive time, restocking, training. Often 30% of the paid day
Vehicle and tools	$24	Payment, fuel, insurance, maintenance, replacement
Overhead allocation	$62	Office, dispatch, software, marketing, licensing
Materials with markup	$297	$180 cost at 65% markup
Target profit	$99	What is left for the business

The wage is under a fifth of the price. Trades that price at two or three times the wage are usually operating at a loss without knowing it.

Materials markup in the trades

Materials markup of 50% to 100% is standard, giving margins of 33% to 50%. It compensates for sourcing time, stocking, delivery, warranty and the cost of holding van inventory.
Equipment — furnaces, water heaters, condensers — carries lower markup, typically 25% to 50%, because the dollar values are large and customers can price-shop them online.
Consumables (fittings, solder, tape, sealant) are usually recovered through a materials charge or built into the flat rate rather than itemised. Itemising $3 fittings generates disputes worth more than the margin.
Do not itemise a marked-up parts list on a flat-rate invoice. Flat rate prices the outcome; showing the parts breakdown invites the customer to price the parts themselves and object.
Track material cost as a percentage of revenue by job type. Drift in that figure is the earliest warning that your flat-rate book has fallen behind supplier prices.

Updating the price book

A flat-rate book is a perishable asset. Equipment and material costs move continuously, wages move annually, and a book left unrevised quietly converts profitable tasks into unprofitable ones.

Review at least twice a year, and immediately after any significant supplier increase.
Recalculate your overhead recovery rate whenever revenue or headcount changes materially.
Audit actual time against booked time on a sample of jobs each quarter. Tasks that consistently overrun are mispriced, not badly executed.
Price diagnostics separately and charge for them. Free diagnostics turn skilled labour into a marketing cost.
Set after-hours and emergency rates as a defined multiple rather than case by case, so the premium is consistent and defensible.

Frequently asked questions

What markup should HVAC and plumbing companies use on materials?: 50% to 100% on general materials, producing a 33% to 50% margin, and 25% to 50% on major equipment where dollar values are high and customers can compare prices online. The markup covers sourcing, stocking, delivery and warranty, not just the part itself.
Is flat-rate pricing better than hourly billing?: For service and repair work, generally yes. It gives the customer price certainty, removes arguments about duration, and rewards efficiency instead of penalising it. Hourly billing still makes sense for genuinely open-ended work such as complex diagnostics or large installations where scope cannot be defined up front.
How do I build a flat-rate price?: Start from your fully loaded cost per billable hour — wage plus payroll burden, non-billable time, vehicle costs and overhead allocation — then multiply by the task's expected duration, add materials with markup, and add target profit. The technician's wage is typically less than 20% of the final price.
Should I show materials separately on a flat-rate invoice?: No. Flat rate prices the completed task, and itemising marked-up parts invites the customer to compare each line against retail prices. Present the task price and what it includes. Keep detailed material costing internal, where you need it for margin tracking.
How often should I update my flat-rate price book?: At least twice a year, and immediately after a significant supplier price increase. Also revisit it whenever wages or overhead change. A book that is 18 months old in a rising-cost market is pricing today's work with last year's costs.