This guide is for the hobbyist with a good setup who keeps getting asked. If you already plan to go pro, start with our pricing guide for detailers instead.

Free, at cost, or a family rate?

You have three honest options. Pick one per person, not per mood.

  • Free. Best for parents, a partner, or anyone who helps you wash. It stays a favor.
  • At cost. You charge only for soap, towels, dressing and water. Nobody profits, nobody feels used, and your shelf refills itself.
  • A family rate. Supplies plus a little for your time. This is the right call once the requests turn regular.

A hobbyist in a detailing community asked exactly this. His in-laws wanted their cars cleaned now and then, and he floated $40 for inside and out to cover supplies with a bit left over. He said he didn’t want to undercut local pros. The replies ran from charging family nothing at all to nothing under $100. Several people suggested a trade instead, like pet-sitting or a case of something cold.

There’s no single right number. But there is a useful yardstick: what a pro near them would charge. (For the flip side, a friend who got a free detail and wants to say thanks, see our tipping guide.)

What pros charge for the same job

A family rate makes more sense when you know what you’re discounting from. These are published starting prices for basic sedan jobs, checked in October 2026.

Detailer (own website) Where Basic job Starting price
Halo Mobile Detailing Nashville, TN Express Detail: vacuum, wipe-down, windows, hand wash, wheels, tire dressing $150
Pressure Mobile Car Wash Houston, TX Quik Press exterior wash plus Quik Interior refresher $45 + $85 = $130
Milliren Mobile Detailing Chicagoland, IL Basic mobile car wash $75

So a $40 inside-and-out wash is about a quarter of that Nashville express price. That’s a real gift to your in-laws, even when it doesn’t feel like one while you scrub wheel wells.

Two cautions. First, don’t price like a pro when you aren’t one. You likely have no business insurance and no way to fix a mistake on someone else’s paint.

Second, a very low price still has a cost. One pro in that thread said people often ask why he charges $300 when a relative did it for $40. And one Nashville detailer’s own price page warns that $60 to $80 rates usually mean rushed work. If you might go pro someday, your family price becomes the number people remember.

For fuller price ranges, see mobile detailing cost by vehicle size.

Agree on the job before you start

Most family detailing fights aren’t about money. They’re about expectations. Several replies in that thread warned that friends and family can be the pickiest customers. A two-minute talk heads that off:

  1. Say what’s included. “Wash, vacuum, wipe-down, tire shine,” not “I’ll detail it.”
  2. Say what’s not. Pet hair, stains, odors and scratches are separate jobs.
  3. Say you’re a hobbyist. They’re getting weekend-garage work, not shop work.
  4. Skip the risky stuff. Don’t machine-polish paint you couldn’t afford to have fixed.
  5. Set a schedule. “Once a month” is a plan. “Whenever” turns into every Saturday.
  6. Settle the price or trade up front. Then don’t renegotiate in the driveway.

When does it stop being a hobby?

When you start washing cars for people you don’t know, for profit, on a schedule, it starts to look like a business. The IRS looks at several factors rather than one test. Its hobby-versus-business fact sheet lists them, such as whether you run the activity like a business, keep accurate books, advertise it, depend on the income, and expect a profit.

A few points from IRS pages are worth knowing, even at $40 a car:

  • Hobby income still counts. The IRS says income from an activity with no profit motive is reported on Schedule 1 of Form 1040. Losses from it can’t offset your other income.
  • Business income has its own rules. If you’re self-employed, you usually owe self-employment tax once net earnings reach $400.
  • Payment apps. Apps must send a Form 1099-K when payments for goods or services top $20,000 in more than 200 transactions. The IRS says you must report service income either way, even when paid in cash. Gifts and repayments for shared personal costs, like splitting a meal, aren’t taxable.

This isn’t tax advice. Read the IRS pages in the sources below, or ask a tax professional about your situation. If you’re ready to make it official, our guide to starting a mobile detailing business walks through the setup in order.

A simple rule of thumb

Free for the people who’d help you move. At cost for the occasional favor. A family rate, set out loud and well under local pro prices, for anyone on a schedule. And once strangers start calling, it’s time to price like a business.

Sources

Checked 2026-10-09. How we check facts: methodology.