Car & Auto Repair

Trailer hitch installation cost calculator

Work out what installing a trailer hitch will cost from the hitch, the wiring, and the labor. A basic hitch is inexpensive and often bolts to existing holes; the electrical wiring for lights and brakes, and the labor to route it, are where the bill is really decided. The calculator adds up your quote.

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The hitch itself, by class. A light Class I or II for a bike rack is cheap; a Class III or IV for real towing, or a gooseneck, costs more.
The electrical harness for trailer lights, and a brake controller if you tow a braked trailer. A simple 4-pin is cheap; a 7-pin with a brake controller more.
Time to bolt on the hitch and route the wiring. A bolt-on hitch with a plug-in harness is quick; drilling, or splicing wiring on a car without a tow package, takes longer.
The installer's hourly rate. A trailer or hitch specialist is often cheaper than a dealer.
A ball and ball mount, a brake controller for a braked trailer, or a wiring adapter. Zero if the base hitch and harness are all you need.
Estimated cost
$445

Typical range $378$601

  • Hitch (part)$200
  • Wiring harness$80
  • Labor (hours × rate)$165
  • Ball mount, brake controller & extras$0
  • Total$445
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$300 to $700 is a heavier hitch or wiring spliced into a car without a tow connector. Confirm what your car needs before you book.

What this assumes, and where it could be wrong

Every one of these is a place the number could be off. They are here because you should be able to check our working, not because we are hedging.

THE HITCH IS CHEAP; THE WIRING AND THE LABOR ARE THE BILL.
A bolt-on hitch matched to your car often fits existing frame holes and costs little. The electrical side is where the money is: a plug-in harness on a car with a tow-package connector is quick and cheap, but a car without one may need wiring spliced into the tail-light circuit, which is fiddly labor. Ask whether your car has a tow-package connector, because it decides the wiring cost

The hitch class must match what you tow, and it is a safety line, not a price choice. A light Class I hitch for a bike rack is not a Class III or IV for a loaded trailer. Buying a hitch rated below your load is dangerous; buying well above it wastes money. Match the class to the trailer's loaded weight and your car's tow rating, whichever is lower.

A braked trailer needs a brake controller, and that adds cost. Trailers above a certain weight have their own brakes, which require a controller wired into the car and a 7-pin connector rather than a simple 4-pin. If you tow a braked trailer, the controller and the heavier wiring are a real add, not optional.

A DIY bolt-on install is realistic for a simple hitch, and it is most of the saving. If your car has existing frame holes and a plug-in harness, fitting the hitch yourself is a driveway job with hand tools, and the labor is the line you avoid. Custom wiring or drilling is where a professional earns the fee.

The defaults are ours and are a starting point. The hitch, the wiring, and the labor are yours, and the estimate turns most on whether your car has a tow-package connector or needs the wiring spliced in.

Frequently asked questions

How much does it cost to install a trailer hitch?
It is the hitch, the wiring, and the labor. A basic bolt-on hitch with a plug-in harness on a car that has a tow-package connector is inexpensive; a heavier hitch, a 7-pin harness with a brake controller, or wiring spliced into a car without a connector costs more. The calculator above adds up your quote from those pieces.
Why does trailer wiring cost so much?
Because it depends on your car. If the car has a factory tow-package connector, a plug-in harness is quick and cheap. If it does not, the installer has to splice into the tail-light wiring, and for a braked trailer add a brake controller and a 7-pin connector, which is careful, time-consuming work. The wiring, not the hitch, is usually the larger and more variable line.
What hitch class do I need?
Match it to the loaded weight of what you tow and your car's tow rating, whichever is lower. Class I and II are for light loads like bike racks and small trailers; Class III and IV are for real trailers and boats; gooseneck and fifth-wheel are for heavy towing. Do not buy below your load, and there is no safety gain in buying far above it.
Can I install a trailer hitch myself?
Often, for a simple bolt-on hitch on a car with existing frame holes and a plug-in wiring harness: it is a driveway job with basic tools, and it saves the labor line. Where a professional earns the fee is custom wiring, drilling, a brake controller, or a car with no tow-package connector, which is fiddly and easy to get wrong.

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