Route optimization for service technicians

What route optimization really means

For a service company, route optimization is not only finding the shortest path between today's jobs. By the time the jobs are booked, most of the waste is already locked in. A tech sent from the north side to the south side for a 30-minute repair and back again loses an hour that no map app can recover. Real route optimization starts at the moment the call is booked: which day, which window and which tech.

Think of it in four levels, from cheapest to most sophisticated. Most shops get the biggest gains from the first two levels, which cost nothing but discipline.

The fuel and mileage math

Before you change anything, put a price on a mile and an hour. The IRS business standard mileage rate is a sensible starting point for the full cost of running a vehicle: 72.5 cents per mile from January to June 2026 and 76 cents from July 1, 2026^[1]. Your own figure may be higher for heavy upfitted vans.

Then add labor. The median HVAC mechanic earned $29.33 an hour in May 2025^[3], and the loaded cost with taxes and benefits is higher. A rough way to value a minute of drive time is mileage at your average speed plus the tech's loaded hourly cost divided by 60.

1. Example: a tech drives 22 miles between stops in a day at an average of 25 miles an hour, so 53 minutes of driving.
2. Mileage cost: 22 x 76 cents is about $16.72^[1].
3. Labor cost: at an example loaded rate of $45 an hour, 53 minutes is about $39.75.
4. Total for this example: about $56 a day per tech in drive cost, or about $1,130 a month across a 20-day month.
5. In the example, cutting drive distance by a quarter saves about $280 a month per tech, plus time to run another call some days.

Driving habits count as much as the route

A perfect route driven hard still burns fuel. The U.S. Department of Energy says aggressive driving, meaning speeding, rapid acceleration and braking, can lower gas mileage by roughly 15% to 30% at highway speeds and 10% to 40% in stop-and-go traffic^[2]. Service routes are mostly stop-and-go.

Idling is the other quiet cost. A vehicle can use a quarter to a half gallon of fuel per hour idling, depending on engine size and air conditioner use^[2]. A van left running for 20 minutes at each of five stops idles for well over an hour a day. A simple engine-off rule at the curb is free.

How to build zone days

1. 01

   Map last year's jobs

   Export job addresses from your software and plot them. Look for natural clusters around ZIP codes, highways and rivers.

2. 02

   Draw four to six zones

   Make each zone roughly equal in job volume, not in area. Dense suburbs get small zones; rural areas get large ones.

3. 03

   Assign days

   Give each zone one or two fixed days a week for maintenance, estimates and non-urgent repairs.

4. 04

   Write the booking rule

   CSRs offer the zone day first. Off-zone dates are offered only when the customer cannot make the zone day work.

5. 05

   Keep emergency capacity

   Hold one tech or a few slots each day that can go anywhere for no-heat, no-cooling and leak calls.

6. 06

   Review monthly

   Rebalance zones when one fills two weeks out and another sits half empty.

Clustering rules for repair calls

Repair calls cannot wait for a zone day, but they can still be clustered. Dispatchers in building equipment contracting are a small group, about 14,490 people in May 2025^[4], and in most shops the CSR who answers the phone is effectively doing the dispatching. Give them rules they can apply in the moment.

• Show the CSR the map, not just the calendar, when offering slots.
• Offer the window next to an existing job first: "We have a tech two streets away at 1."
• Use arrival windows of two to four hours so the dispatcher can sequence.
• Avoid booking one tech on opposite sides of the area in back-to-back windows.
• Put long jobs at the start or end of a route, close to the tech's home or the shop.
• Book the customer who is flexible on time into the gaps the route creates.

Start and end points matter

Where the day starts changes every route. If techs take vans home, the first and last stops should sit near their homes, and you should split the service area so each tech owns the zone closest to where they live. If everyone starts at the shop, the first job of the day should be the one nearest the shop, with longer jobs planned so the tech finishes heading back toward base rather than ending 40 minutes away at 5 p.m.

Supply runs belong on the route too. A mid-day trip to the supply house that sits on the way between two jobs costs a few minutes; one that sits across town costs an hour. Keep a list of parts houses by zone and route parts pickups like any other stop, ideally before the first call.

Finally, hand the plan to techs the night before. A tech who knows tomorrow's first three stops can load the right parts, check traffic and leave on time. A tech who learns the first address at 7:55 in the shop yard starts the day already behind.

When routing software pays for itself

Routing tools range from the sequencing built into field service software to dedicated planners. The test is the same for all of them: will the drive time saved, valued at mileage plus loaded labor, exceed the cost within one busy season?

Run a two-week trial with your own jobs. Record miles and drive minutes per stop before and during the trial. If the tool cannot show a saving on your data, do not buy it on a demo route.

Example: one week before and after

Example (fictional): a five-van pest and lawn company averaged 31 miles and 74 minutes of driving per van per day across a mixed week. After moving recurring services onto zone days and asking CSRs to cluster one-off calls, the next comparable week averaged 23 miles and 55 minutes. Using the math above, that is roughly $6 in mileage and about $14 in labor saved per van per day, or around $100 a day across the fleet, before counting the extra stops the saved minutes made room for.

Fewer miles is also safer

Every mile removed is a mile without crash risk. Transportation incidents were the most frequent type of fatal work event in 2024, at 38.2% of all occupational fatalities^[5]. Shorter routes, fewer rushed cross-town drives and realistic arrival windows that do not push techs to speed all reduce exposure.

Mistakes that undo the savings

• Letting CSRs override zone days whenever a caller hesitates.
• Arrival windows so tight that the route cannot be sequenced.
• Optimizing miles but ignoring left-hand turns across busy roads and school-zone times.
• Re-routing so often that techs stop trusting the plan.
• Measuring miles but not drive minutes, which is what limits capacity.

Track miles per stop and drive minutes per stop every week. If both fall while completed stops stay steady or rise, the routing is working. Pair this with capacity planning so the minutes you save turn into booked calls.