A lockout or a rekey feels like a quick number to quote on the phone, and that is exactly how the after-hours premium gets forgotten and the trip fee gets folded into "just the labor." A full quote has to separate billed time from parts, apply an emergency premium to time only, and compare the result against a minimum service charge — the floor that protects a short job from pricing below what showing up cost.
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The after-hours premium, applied inconsistently. A call taken at 2am deserves a premium for your availability, not for extra difficulty — and that premium belongs on labor and travel time, never on parts, which cost the same at any hour.
Travel time billed at the wrong rate, or not billed at all. Drive time to a call is time you cannot sell to anyone else. Pricing it separately from on-site labor keeps a far call from quietly costing you more than it earns.
A callback reserve. A rekey or install occasionally needs a free return visit. Setting aside a percentage of the job's direct cost for that risk keeps it from eating into margin on every job where it happens, instead of only the ones where you remember to add it.
The minimum service charge as a real floor, not a suggestion. A five-minute job with no parts can calculate to well under $90 once you count only labor and the trip fee — a stated minimum, compared against the calculated price, is what keeps that trip from being a loss.
A customer calls at night, locked out, 15 minutes of labor once you arrive and 25 minutes of round-trip travel, an $85/hour rate, a 50% after-hours premium, a $45 trip fee, no parts (nothing replaced), a 4% callback reserve, 15% overhead, and a 30% target margin:
| Figure | Value |
|---|---|
| Billed time (labor + travel, before premium) | $56.67 (0.67 hrs × $85) |
| Emergency premium (50% of billed time) | $28.33 |
| Total billed time | $85.00 |
| Trip fee | $45.00 |
| Parts | $0.00 |
| Callback reserve (4%) | $5.20 |
| Overhead (15%) | $20.28 |
| Total cost | $155.48 |
| Price at 30% target margin | $222.11 |
| Minimum charge applied? | No — $222.11 is above the $89 floor |
| Profit | $66.63 |
Skip the after-hours premium on this same call and the price drops to about $173.70 — an $89 minimum still never enters the picture, but the emergency premium alone is worth roughly $48 here, money that disappears the moment a quote gets rounded to a flat "call it $180, cash" on the phone instead of built up from the two pieces. On a shorter, parts-free daytime call the same arithmetic can fall below the $89 floor entirely, which is when the minimum — not the formula — sets the price.
Start from your normal labor and travel time cost, add the after-hours premium to that billed time only (not to any parts), add the trip fee and a callback reserve, then apply overhead and your target margin. A 15-minute lockout with 25 minutes of travel at an $85/hr rate, a 50% emergency premium, and a $45 trip fee prices at about $222.11 once overhead and a 30% margin are applied — well above a flat $89 minimum, which is what makes the after-hours premium worth tracking separately instead of folding it into a round number.
Because the after-hours premium is easy to apply to the whole quote in your head and easy to forget applying to travel time specifically — a call 25 minutes away at 2am costs the same drive either way, but the labor on top of it is worth more because you are giving up sleep or another evening to take it. Pricing time and parts separately, and applying the premium to time only, keeps the parts markup honest and the after-hours premium visible instead of blended away.
On short, low-parts jobs — a single cut key, a car door unlock with no hardware replaced. A five-minute job with five minutes of travel and no parts can calculate to well under $90 once you count only labor and trip fee, which is why a stated minimum service charge, compared against the calculated price, protects the trips that would otherwise price below what showing up cost.
No. This is pricing arithmetic only. Licensing, bonding, and insurance requirements vary by state and municipality, and verifying and maintaining them is a separate step this guide and the calculator do not cover.