Minimum Service Charge: How to Set the Floor Price for Showing Up
A trip costs what it costs. Build your service-call floor from burdened labor, the truck, overhead and margin — instead of copying the shop across town.
Forum threads on minimum service charges go the same way every time: "What do you guys charge to come out?" followed by numbers and a few strong opinions. The numbers aren't transferable — a $35 trip across a small town in a paid-off van and a $35 trip in a financed truck at $25/hr shop labor in a metro are different businesses wearing the same fee. What transfers is the method.
What the floor has to carry
- The trip: fuel, vehicle wear, and the unbillable drive time at your burdened rate.
- The first hour on site — diagnostics count as work; someone pays for the tech's expertise even when the fix is "you need a new unit."
- Overhead on all of the above: insurance, software, the phone that rang.
- Margin — because a floor that only breaks even turns your smallest jobs into unpaid advertising for your costs.
The formula
- Smallest-call cost = (first hour × burdened rate + trip) × (1 + overhead%)
- Minimum charge = smallest-call cost ÷ (1 − target margin), rounded to a quotable number
This is exactly the flat-rate math with materials at zero — which is why the flat rate calculator suggests a minimum automatically: it prices the same call without parts, and that's your floor.
Worked example
Solo electrician, $55/hr burdened rate, $30 average trip, 15% overhead, 35% target margin:
| Line | Calculation | Amount |
|---|---|---|
| First hour (burdened) | $55 × 1 | $55.00 |
| Trip cost | fuel + wear + drive time | $30.00 |
| Overhead allowance | $85 × 15% | $12.75 |
| Smallest-call cost | $97.75 | |
| Minimum at 35% margin | $97.75 ÷ 0.65 = $150.38 → quote $155 (rounded up) | $155 |
Notice the shape of the result: the floor is basically "first hour plus trip, properly priced." That's why shops that charge "just a $50 trip fee" lose money on every declined quote — the fee doesn't carry the hour, let alone the overhead and margin.
Get your suggested minimum in the flat rate calculator →
Using it without losing the job
- Say it before the truck rolls: "The visit is $X, which covers diagnosis; that amount goes toward the repair if you approve it." Surprises, not numbers, are what customers punish.
- Waive-against-work freely once the flat rate carries the same costs — see the flat rate vs hourly comparison for why the two models share this math.
- Scale by distance if your service area is wide: a tiered floor (base + $Y per 10 miles past the line) is honest arithmetic, not a surcharge.
- Review the floor when your burdened rate or fuel moves. A minimum set two years ago is a museum piece.
Frequently asked questions
How much should I charge for a service call?
Industry surveys (SmartService, 2026) put most trip/diagnostic fees between $75 and $150, but the useful number is yours, not the survey's: your burdened first hour + trip cost + overhead share, priced at your target margin. For many solo operators that arithmetic lands near the survey range by coincidence, not because $100 is a standard.
Should the service call fee be waived if the customer books the repair?
Waiving it against approved work is a sales tactic, not a pricing decision — just make sure the repair's flat rate carries the trip and diagnostic time, because the costs don't waive themselves. Many shops quote slightly higher repair prices and advertise the "free" diagnostic; the math is identical either way.
What's the difference between a trip charge and a minimum service charge?
A trip charge recovers only the cost of coming out — fuel, vehicle wear, drive time. A minimum service charge is a full price floor: it also covers the first (diagnostic) hour, its burden, and overhead, priced at your margin. Charging only a bare trip charge guarantees every tiny job loses money once labor is counted.