How Much Should You Charge for an After-Hours Plumbing Call? Work It Out From Your Own Numbers

Short answer: charge enough that one after-hours call covers the tech's overtime for the minimum hours you pay, the payroll burden on that pay, the truck, and its share of the on-call stipend, then divide by one minus your target margin. With the example numbers below that lands around $305 for the first hour before the stipend, and around $520 once the stipend is spread over only four calls a month. The number that moves your price most is not the tech's wage. It's how few calls the on-call week has to pay for.

Every figure below is an example assumption, labeled as one. Replace each with your own and the arithmetic still works.

Step 1: The direct cost of one call

• Tech pay (assumption): $35/hr base, paid time-and-a-half after hours = $52.50/hr.
• Minimum paid time (assumption): you guarantee the tech 2 hours for getting out of bed. 2 × $52.50 = $105.00.
• Payroll burden (assumption): payroll taxes, workers' comp and benefits at 25% of wages. $105.00 × 0.25 = $26.25.
• Truck (assumption): 30 miles round trip at $0.70/mile = $21.00.

Direct cost: $105.00 + $26.25 + $21.00 = $152.25.

Step 2: Price it for margin, not markup

If you want 50% of the ticket left after direct cost, divide by (1 − 0.50). Don't multiply by 1.5:

• $152.25 ÷ 0.50 = $304.50. Round to $305 for the first hour.
• A 1.5× markup would give $228.38, which is only a 33% margin. That gap is where after-hours work quietly stops paying.

Step 3: Add the cost of being on call

Most shops pay something for a tech to carry the phone, whether or not it rings. Say you pay a $100/week on-call stipend (assumption). That's $100 × 52 ÷ 12 = $433.33 a month the night calls have to cover.

• At 4 calls a month: $433.33 ÷ 4 = $108.33 per call. Cost $152.25 + $108.33 = $260.58. At 50% margin: $260.58 ÷ 0.50 = $521.16.
• At 12 calls a month: $433.33 ÷ 12 = $36.11 per call. Cost $188.36, price $376.72.
• At 30 calls a month: $433.33 ÷ 30 = $14.44 per call. Cost $166.69, price $333.38.

Same tech, same truck, same margin, and the right price swings by almost $190 on volume alone. Count your own after-hours calls for the last three months before you pick a number.

Step 4: Hours after the first

Once the tech is on site, the stipend and the truck are already paid for. Each extra hour costs $52.50 + 25% burden = $65.63. At 50% margin that's $65.63 ÷ 0.50 = $131.25/hr, plus parts at your normal parts markup.

Step 5: Sanity-check it against your day rate

If your daytime first hour is $150 and your worked-out after-hours number is $305, you're at about 2× your day rate. If your math says 3× or more, the cause is almost always low call volume carrying the whole stipend (Step 3). Either accept fewer, pricier calls, or change the on-call setup so fewer hours are paid for nothing.

Flat call-out or hourly?

A flat after-hours fee that includes the first hour is easier to say on the phone and easier to agree to before you roll. Whatever structure you pick, say the number before the truck leaves, and put it on the invoice the same way you said it. A fee the customer first hears about at the door is a fee you'll end up arguing about.

Your worksheet

1. After-hours hourly pay × minimum paid hours = labor.
2. Labor × your burden rate = burden.
3. Round-trip miles × your cost per mile = truck.
4. Monthly on-call cost ÷ after-hours calls per month = standby share.
5. Add 1 through 4, then divide by (1 − target margin). That's your first-hour price.

If night calls are ringing out while you work this out, that's the gap Bob covers: it answers, quotes the fee you set, and books the job.