Free tool
The Leak Calculator
Every operational leak has a dollar figure. Most owners never compute it, so the leak loses to whatever is loud today. Pick your leak, enter three or four numbers you already know, and get a monthly and annual estimate you can prioritize against.
Free tool, unlocked by email
Enter your email and the calculator opens right here. If you want occasional practical AI notes too, opt in below.
Something went wrong. Email jonathan@builtwithjon.com and I will send you the direct link.
The site is static, so nothing here is truly locked. This just lets me know who is running their numbers.
Pick the leak that has been nagging you
Missed calls
Home services
Calls that ring out while your crews are on jobs. The caller usually dials the next company on the list.
This is an estimate from your inputs, not a measurement.
Pull the actual call log before believing any of this. If your working-hours answer rate is genuinely high, this is not your leak. Look at your invoice chase instead.
Example inputs from the article. No industry benchmark is assumed here.
The fix is in the article: The missed-call math. This tool prices one leak. The Hidden Profit Scorecard ranks all three axes: deals, time, and cash.
Slow bid follow-up
Contractors
Bids that go out and then go quiet. The close-rate difference between fast and slow follow-up is the leak.
This is an estimate from your inputs, not a measurement.
Every bid that dies from silence still consumed the walk-through, the takeoff, and the proposal. You paid to lose.
Example inputs, not benchmarks. The five-point swing is the article’s illustration. Use a swing you actually believe.
The fix is in the article: Slow bid follow-up loses jobs. This tool prices one leak. The Hidden Profit Scorecard ranks all three axes: deals, time, and cash.
Unbilled change orders
Contractors
Extra work that got a verbal yes in the field and never made it onto an invoice.
This is an estimate from your inputs, not a measurement.
This is completed work you already paid crews for. Capture at the moment of the yes beats reconstruction at billing time.
The 8% and 30% figures are the article’s typical-remodel illustration. Put in your real contract mix.
The fix is in the article: Change-order revenue you never invoiced. This tool prices one leak. The Hidden Profit Scorecard ranks all three axes: deals, time, and cash.
Unanswered inquiries
Professional services
New inquiries that sit past the day they arrive. Prospects reached promptly close at a very different rate than prospects reached late.
This is an estimate from your inputs, not a measurement.
The estimate assumes half of your slow-answered inquiries would have converted at the prompt rate. The other half were never going to hire you anyway.
The same-day default reflects Clio’s 2024 Legal Trends finding that only 40% of firms answered calls and 60% never answered email inquiries at all.
The fix is in the article: The inquiry that booked your competitor. This tool prices one leak. The Hidden Profit Scorecard ranks all three axes: deals, time, and cash.
Engagement-letter delay
Professional services
The gap between the verbal yes and the signed letter. The fee clock does not start until the document goes out.
This is an estimate from your inputs, not a measurement.
This money is pushed later, not lost outright. But a slow-start engagement is more likely to become a slow-pay engagement.
Example inputs from the article. No industry benchmark is assumed here.
The fix is in the article: Same-day engagement letters. This tool prices one leak. The Hidden Profit Scorecard ranks all three axes: deals, time, and cash.
Cold DMs and inquiries
Coaches and creators
Your content generated the interest. Then the inquiry sat in an inbox while you were heads-down creating.
This is an estimate from your inputs, not a measurement.
This counts only the conversations that went quiet before you saw them. Late replies that still lose are on top of this.
Context: RevenueHero’s 2024 study of 1,000 B2B companies found 63.5% never responded to inbound leads at all.
The fix is in the article: Leads go cold while you are heads-down creating. This tool prices one leak. The Hidden Profit Scorecard ranks all three axes: deals, time, and cash.
Slow quotes
Home services
The quote that waits until Friday competes with everyone who answered sooner.
This is an estimate from your inputs, not a measurement.
These are stated example inputs, not benchmarks. Put in your own quote volume, ticket size, and a follow-up-speed swing you actually believe.
Example inputs from the article. No industry benchmark is assumed here.
The fix is in the article: The quote that waited until Friday. This tool prices one leak. The Hidden Profit Scorecard ranks all three axes: deals, time, and cash.
No-shows
Clinics and wellness
Visits that were scheduled, staffed for, and never delivered.
This is an estimate from your inputs, not a measurement.
Pull your real no-show rate from your scheduling system rather than guessing. Most owners underestimate it. North of 10% and this is very likely your biggest leak.
The 6.81% default is the MGMA 2023 median patient no-show rate.
The fix is in the article: The empty-chairs no-show math. This tool prices one leak. The Hidden Profit Scorecard ranks all three axes: deals, time, and cash.
The first-reply window
Real estate
Online leads mostly go to whoever replies first. This is what is riding on your reply speed.
This is an estimate from your inputs, not a measurement.
This is commission riding on speed, not commission lost. Even the conservative read, one extra closed deal a quarter from being consistently first, is real money.
NAR 2024: 78% of buyers work with the first agent who responds. The up-for-grabs share is an example input, not a benchmark.
The fix is in the article: The five-minute reply window. This tool prices one leak. The Hidden Profit Scorecard ranks all three axes: deals, time, and cash.
Invoice aging
Any business
Money you already earned, parked in receivables while payroll stays a fixed date.
This is an estimate from your inputs, not a measurement.
This is cash parked, not cash lost. Pull your own aging report before trusting it. If the 30-plus bucket is small, this is not your leak.
Defaults are the Intuit QuickBooks 2025 national pattern: $17,500 average owed, 47% of small businesses carrying invoices 30+ days overdue.
The fix is in the article: The invoice chase is a payroll problem. This tool prices one leak. The Hidden Profit Scorecard ranks all three axes: deals, time, and cash.