Every input below is yours to change. The defaults are example values for illustration — not industry data — and the math is printed under the tool so you can check it by hand.
The result is an estimate under your own assumptions, not a prediction. Change any input you disagree with — that's the point of the tool.
How the math works
The formula is printed here so you can redo it on paper:
lost jobs / week = missed calls x customer share x lost share x close rate
lost revenue / wk = lost jobs x average repair order
lost revenue / mo = weekly figure x 4.33 (average weeks per month)
Nothing else happens behind the scenes — no hidden multipliers, no industry averages baked in. If you set every input honestly, the output is as honest as your inputs.
How to count your missed calls in one week
Do this once, this week:
- Open the recent-calls list on the shop phone every evening.
- Count calls you didn't answer and didn't return the same hour — a fast callback usually keeps the customer, so it shouldn't count as lost.
- Skip numbers you recognize: parts suppliers, family, spam.
- Write the daily count somewhere you'll find it. Friday, add it up.
That number — not a guess — goes in the first box. Most owners who do this for the first time are counting it for the first time ever, which is exactly why the phone leak goes unnoticed.
Choosing honest values for the other inputs
Share that are real customers. Go through the same week's missed numbers and call the ones you don't recognize, or check them against later bookings. If you can't check, start at half and adjust after your next count.
Share you never reconnect with. Some callers ring back, some answer your callback. The ones that matter are the ones who vanish. For urgent car trouble, vanish rates run high — people keep dialing shops until someone answers. Pick what matches your callback habit: if you return every missed call within the hour, set this low.
Close rate on lost callers. Use your normal quote-to-job rate. If a third of your quotes become jobs, say 33 here. Don't flatter it.
Average repair order. Pull it from your last month of invoices: total revenue divided by job count. Use your real number, not your best week.
What to do with the result
If the monthly figure is small — good news. Your callback habit is working. Re-run the count during your busy season before you buy anything, because storm weeks and Monday mornings behave differently.
If it's the price of a lost job or two per week, fix the cheapest link first:
- Free: set fixed callback times — mid-morning, lunch, close. Every local-number missed call gets a same-day return.
- Cheap: give callers a second path. A real quote-request form built for auto shops captures the vehicle, symptom, urgency, and photos from people who won't leave voicemails — including the ones who call after hours.
- Structural: if requests come in but die on sticky notes, the problem is tracking, not capture. That's what a lead dashboard with follow-up status is for — see the full walkthrough in how much revenue auto shops lose from missed calls.
FAQ
Does voicemail fix this? Only for callers who leave one. Many don't — for illustration, think about how often you leave voicemails for businesses yourself. The calculator's "never reconnect" input is where your voicemail reality goes: if your box catches most callers, set it low.
What about after-hours calls? They're missed calls too, and they're the strongest case for a form: a customer describing a brake noise at 9pm can fill out your intake form tonight and be your first callback tomorrow.
Is the monthly number a prediction? No. It's your own assumptions multiplied together — an estimate that's only as good as your inputs. Its job is to tell you whether this leak is worth fixing, not to promise a payback.
See the fix on your own site
If your number justifies it, the next step takes zero commitment: we build a free lead-capture preview of your website with a working quote-request form — before you pay anything. You look at it, run a test request, and decide. No contracts, and you own the site and the leads either way.