Take your monthly spend and your Direct/Unknown lead percentage, and see the dollar figure sitting behind that gap.
Monthly spend with no proof of which channel earned it
$1,205
Annualized version of the same leak
$14,460
Monthly spend you can currently tie to a channel
$3,795
The calculator multiplies your entered monthly spend by your entered Direct/Unknown percentage to produce a dollar figure, then multiplies that by 12 for an annual estimate. It assumes your Direct/Unknown percentage applies evenly across your spend, which won't be exactly true if some channels are tagged more reliably than others. This is an arithmetic illustration of an attribution gap, not a measurement of wasted or misspent budget.
Lead Recorder attaches the actual channel, ad, or keyword to every form fill and call, so this number becomes a fact, not a guess.
Try Lead Recorder freeA lead marked Direct/Unknown isn't proof a channel failed, it just means no referrer or UTM data came through. But the dollars behind that gap are real, and across Lead Recorder's tracked dataset, 24.1% of leads land in that bucket even with tracking installed. If you can't see which channel earned a lead, you can't tell if that part of your spend is working.
The result labeled monthly spend with no proof of which channel earned it isn't a claim that you wasted that money. It's a claim that you can't currently point to the channel that earned it. With the default inputs of $5,000 in monthly spend and 24.1% tagged Direct/Unknown, the calculator returns $1,205 a month and $14,460 a year. That's spend sitting behind leads where no referrer and no UTM data came through, not spend that failed.
The 24.1% default isn't arbitrary. It's the actual share of leads across Lead Recorder's tracked dataset that land in the Direct/Unknown bucket even with tracking installed, up from 19% in the tool's original release (Lead Recorder Lead Source Statistics, stats page, refreshed 2026-09-07). If your own Direct/Unknown share runs higher than 24.1%, your real number is worse than the default example. If it runs lower, you're already ahead of the average site in the dataset.
Marketers feel this gap even when they can't name it precisely. 62% of marketers who use phone numbers to drive leads say they struggle to track inbound calls back to a source, and 53.3% say a limited understanding of attribution is their single biggest attribution challenge (Ruler Analytics, 2021). That matches what the lead-type breakdown shows: 44.3% of all recorded leads are phone clicks, and 83.1% of those happen on a mobile device, which is exactly the kind of lead that goes untagged if nothing is watching for the click itself.
This also isn't a problem you fix by spending more on tracking in general. 70% of businesses surveyed say they struggle to act on the attribution data they already have (Econsultancy, "The State of Marketing Attribution 2017", with AdRoll, 987 practitioners surveyed). Having a dashboard isn't the same as having a number you'd actually change a budget decision over. The point of this calculator is to turn a vague worry into a dollar figure you can put next to a line item and decide whether it's worth chasing down.
Look at the third result, monthly spend you can currently tie to a channel, before you look at the leak figure. At the defaults that's $3,795 of $5,000, meaning roughly three-quarters of spend already has a channel attached to it. The question worth asking isn't "how do I get the leak to zero", it's whether the remaining untagged share is concentrated in one channel (a phone number printed on a flyer, say) or spread thin across several, because that changes what you'd actually do about it.
Run the calculator with your real spend and your real Direct/Unknown percentage, not the defaults, since the 24.1% figure is a dataset-wide average and your site's mix of phone clicks versus form fills will push it in either direction. A plumbing business, for instance, saw 97.1% of its leads come in as phone clicks rather than form submissions (n=623 across 2 sites), which is a very different risk profile for untagged spend than a painting business at 18.0% phone clicks (n=89, single site). Re-run the inputs monthly if your spend or your tagging setup changes, since the dollar figure moves with both.
No hidden formula: here's exactly what this calculator assumes and why.
It's the share of leads recorded as Direct, meaning no referrer and no UTM data, across Lead Recorder's tracked dataset, even with tracking installed (Lead Recorder Lead Source Statistics, stats page methodology, refreshed 2026-09-07). It's a dataset-wide figure, not a prediction for your business. Replace it with your own Direct/Unknown percentage if you have one.
No. It means you can't currently prove which channel earned those leads. The spend might be working fine, or it might not be. The calculator reframes an attribution gap as a dollar figure so you can decide if closing that gap is worth it, it doesn't claim the spend was ineffective.
It doesn't record or transcribe phone calls, do anything like session replay or heatmaps, or tell you which specific channel those Direct/Unknown leads actually came from. It's a multiplication of your spend against your untagged percentage, nothing more.
Enter your actual monthly marketing spend, for example $5,000, and your own Direct/Unknown percentage from whatever lead tracking you have. If you don't track that yet, start with the 24.1% dataset figure as a rough placeholder, then update it once you have real tagging in place.
The monthly figure is easier to check against your actual spend, the annual figure (monthly leak times 12) makes the scale clearer when you're deciding whether better tracking is worth the effort.
Lead Recorder captures the actual source behind every form fill and call, so you're reporting what happened, not what a calculator assumes.
No credit card required
Found you via Google Ads · "best plumber near me"
Found you via Organic Search · "emergency electrician"
Found you via Facebook Ads
Click the extension on any site to see if its phone numbers are tracked: tel: links, call tracking, Lead Recorder, GA4 and GTM.
A free lead tracking template with source, status, follow-up dates and an automatic pipeline summary. Opens in Excel and Google Sheets.
Scan any URL to find every phone number and enquiry path on the site, and see whether each one is actually being tracked.
Build clean, error-free UTM tracking links in seconds, with auto-lowercase formatting and quick-fill presets for Google Ads, Meta and email.
Scan any URL to check whether Google Tag Manager, GA4, Meta Pixel and Lead Recorder are actually installed in the page head.
Estimate how much lead value and ad spend GA4 misattribution might be hiding in your "direct" traffic.
Paste a messy GA4 or Meta Ads CSV export and get a clean, client-ready summary with top channels and cost per lead.
Check whether your GA4 property has the volume to actually run data-driven attribution, or is silently falling back to last-click.
Enter your monthly ad or agency spend, the leads reported to you, and the leads you can actually verify, and see what percentage of your spend is going toward leads nobody can account for.
Compare what you spend on each marketing channel against the share of leads you assume it brings in, and see where a guess is furthest from your budget.
Enter your monthly ad spend, the leads your channels report, and your actual lead count to see how many leads have no source attached and what they'd cost at your average cost-per-lead.
Compares how much revenue phone leads and form leads produce once you factor in how fast your team follows up, using close-rate estimates you enter yourself.
Enter your monthly leads, how many you can currently trace to a channel, and your average lead value to see how much revenue is sitting behind leads marked "unknown source."
Enter your monthly marketing spend, total leads, and the share you can't confidently attribute to a channel to see the dollar amount you're spending blind.