Call Duration Thresholds Explained: When Does a Home Services Call Count?
The setting that decides what you pay for
If you buy home services calls, one campaign setting does more than any other to shape what you pay for: the duration threshold. Some people call it a buffer or a minimum call length. Whatever the name, it’s the line between a ring and a conversation.
Understanding how it works is what separates paying for real conversations from paying for noise. This post explains what a duration threshold is, why it exists, when the clock runs, and how to tell whether yours is set well.
What a duration threshold is
A duration threshold is the minimum connected time a call has to reach before it counts as a qualified, billable call.
If a call ends before the threshold, it doesn’t bill. If it stays connected past the threshold, it bills. That’s the whole rule.
There’s no universal number. The threshold varies by client, and the client defines it. At Local Spark, the minimum call length is written into each campaign before it starts, so both sides know the rule before the first call arrives.
Why thresholds exist
Not every call that reaches your line is a real opportunity. Some are accidents. Some are noise. A duration threshold filters out the short, unqualified calls before money changes hands, including:
- Misdials. Someone dialed the wrong number and hangs up as soon as they hear your greeting.
- Instant hang-ups. The caller changes their mind, gets interrupted, or the call drops.
- Robocalls and automated noise. These rarely hold a real conversation.
- “Wrong company” calls. The caller was trying to reach a different business and realizes it quickly.
- Solicitors, repeat callers, out-of-area callers, and requests for services you don’t offer. These are not qualified when the call ends before the threshold.
The key phrase is “when the call ends before the threshold.” That’s the protection. A polite, quick close on an unqualified call means it never bills. If an unqualified caller stays on the line past the threshold, the call bills. There are no returns unless a call has a major violation. The duration threshold is the filter, not a dispute desk.
When the clock starts and stops
The threshold measures connected time. That means the clock is counting the time the caller and your team are actually connected, not the time the phone spends ringing.
That distinction matters. A call that rings for a while before someone picks up hasn’t used up any of its threshold while it was ringing. The count reflects how long a real connection lasted.
When you set up a campaign with any provider, ask how they define connected time and confirm it in writing. You want to know exactly what the clock measures before the first call arrives, not after the first invoice.
How thresholds vary
Because the client defines the threshold, it can differ from one campaign to the next. Three things usually drive the choice:
- Trade. Some trades qualify a caller very quickly. Others need more back-and-forth before it’s clear whether the job is a fit.
- Urgency. An emergency call (“water is coming through the ceiling”) tends to get to the point fast. A planned-project call (“we’re thinking about new windows next spring”) often takes longer to reveal real intent.
- How long qualifying actually takes. If your team needs to confirm address, service, and timing before a caller is clearly a fit, your threshold should reflect that reality.
The right threshold for one contractor may be wrong for another, even in the same trade. That’s why it’s a setting, not a standard.
Too short vs. too long
There’s a balance to strike.
If the threshold is too short, more low-intent calls get through. A caller who asks one question and hangs up may still bill, and your cost per booked job rises.
If the threshold is too long, you can end up with a different problem. Some of the best callers book quickly. A homeowner with a clear emergency might give their address, accept an arrival window, and hang up fast. An overly long threshold can exclude exactly those efficient, high-value calls from counting, which makes the campaign harder to sustain and can reduce the calls that come your way.
The goal isn’t the longest threshold you can get. It’s a threshold that matches how long it realistically takes your team to identify a real opportunity.
A worked example: three calls, one threshold
Here’s an illustrative example. No specific durations are used, because the threshold is whatever the client sets.
Call one: the misdial. The phone connects, your CSR greets the caller, and the caller says, “Sorry, wrong number,” and hangs up. The call ends well before the threshold. It does not bill.
Call two: the one-question caller. A homeowner asks whether you service a certain brand of furnace, hears the answer, says thanks, and hangs up. Whether this bills depends on where the call ended relative to the threshold. If it ended before, it doesn’t bill. If it ran past, it does. This is the kind of call that shows why setting the threshold thoughtfully matters.
Call three: the booking. A homeowner describes a furnace that won’t ignite, confirms their address, and books a morning appointment. The call runs past the threshold and bills, and it’s exactly the call you wanted to pay for.
Most calls sort themselves cleanly. The ones in the middle are where your threshold choice does its work.
The buyer’s view: what to ask and how to read reports
Before a campaign starts, any contractor should be able to get clear answers to three questions:
- What is the threshold for this campaign? You define it, so make sure it’s written into the campaign.
- When does the clock start? It should be connected time, not ring time.
- What happens to calls that end before it? They should not bill.
After calls start arriving, the real test is in your reporting. At Local Spark, Mission Control and Intel Desk let you review call reports and recordings against the threshold. Look at the calls that billed and listen to a sample. Were they real homeowners asking about work you do? Look at the calls that ended before the threshold. Were they mostly misdials and quick hang-ups? If the billed calls are consistently real opportunities, the threshold is doing its job. If you keep hearing billed calls that never had a chance, it’s time to revisit the setting for future calls.
One more point from the buyer’s side: the threshold has to be a setting both sides agree on. If it’s set so strictly that good calls rarely count, the campaign becomes hard to sustain and fewer calls come your way. If it’s set too loosely, you pay for noise. An agreed, written threshold keeps the arrangement steady.
How to judge whether your threshold is working
Call counts don’t tell you much on their own. A campaign can deliver plenty of billable calls and still miss the point if few of them become jobs.
Instead, compare billable calls to:
- Appointments set. How many billable calls ended with a scheduled visit or estimate?
- Closed jobs. How many of those appointments turned into paid work?
- Cost per appointment and cost per sale. What did each booked appointment and each closed job actually cost you?
Local Spark reviews quality against appointments and closed jobs, not just call counts, for exactly this reason. If billable calls are turning into booked work at a rate that makes sense for your trade, the threshold is probably in a good place.
Common misconceptions
“A longer threshold always means better calls.” Not necessarily. A longer threshold filters more short calls, but it can also exclude quick, decisive callers who book fast. Better calls come from good matching and a threshold that fits your trade, not from length alone.
“Every call past the threshold is a sale.” No. Passing the threshold means a call was a real, connected conversation long enough to qualify. Your team still has to answer well, qualify, and book. The threshold controls what you pay for, not what you close.
“The threshold is the same everywhere.” It isn’t. Thresholds vary by client, trade, and campaign, and the client defines them.
Thresholds are one layer, not the whole system
A duration threshold works alongside the other rules in a campaign:
- Routing by trade and ZIP, so calls reach contractors who actually do that work in that area.
- Campaign hours, so calls arrive when your team can answer.
- Caller screening, which helps calls reach the right buyer in the first place.
- The ability to pause, so you can stop calls when your crews are fully booked.
Together, those layers decide which calls reach you. The threshold decides which of those calls you pay for.
The bottom line
The duration threshold decides what a contractor pays for. Set it to match how long it really takes your team to identify a real opportunity, confirm that the clock measures connected time, and judge the result against booked appointments and closed jobs rather than call counts.
