Markup & Margin Calculator for Home Services

Parts markup is where many home services businesses either build real profit or leave serious money on the table. The industry standard for parts markup in plumbing, HVAC, and electrical work is 30 to 50% above wholesale cost, but top-performing companies mark up parts 100 to 200% or more on small commodity items like fittings, switches, and filters. The key insight is that customers are not paying for the part itself; they are paying for your expertise in diagnosing the problem, having the right part on the truck, and installing it correctly with a warranty. A $15 capacitor that you sell installed for $85 is not a ripoff, it is a fair exchange for your truck roll, diagnosis, and guarantee. Where operators get tripped up is confusing markup with margin. If you buy a water heater for $400 and sell it installed for $600, your markup is 50% but your gross margin on the part is only 33%. That 33% has to cover your carry cost, warehouse space, and any warranty replacements. This calculator lets you toggle between markup and margin perspectives so you can price parts and labor packages that actually deliver the 50 to 65% blended margins your business needs to be healthy.