Most B2B outbound campaigns are run on the same flat schedule: 8am to 5pm Monday to Friday. The team rolls in, the dialler kicks off, and the daily numbers go in the dashboard. By 5pm everyone is done.
The dialler does not care about hour-of-day. The recipient does.
In February through April 2026 we ran 50,000 outbound calls through 12 NZ and AU campaigns (mortgage broker outreach, property management prospecting, accounting EOFY follow-ups, and three SaaS pipelines). Same agents, same scripts, same lists, different times. Here is what we found.
The data
50,000 outbound calls. NZ and AU prospect lists. B2B contacts (decision-maker level, not consumer). Same agent voice, same script, same intent (qualify or book a discovery call). Calls placed between 7am and 7pm local time, Monday through Friday.
Connect rate (call answered by a human within 25 seconds), by hour and day:
| Time | Mon | Tue | Wed | Thu | Fri |
|---|---|---|---|---|---|
| 8am | 18% | 26% | 28% | 29% | 25% |
| 9am | 22% | 31% | 33% | 32% | 28% |
| 10am | 28% | 38% | 37% | 36% | 31% |
| 11am | 31% | 36% | 35% | 34% | 29% |
| 12pm | 19% | 22% | 23% | 21% | 17% |
| 1pm | 25% | 28% | 29% | 27% | 22% |
| 2pm | 29% | 34% | 35% | 35% | 26% |
| 3pm | 28% | 31% | 32% | 30% | 23% |
| 4pm | 25% | 26% | 27% | 25% | 21% |
| 5pm | 19% | 19% | 20% | 18% | 14% |
The bands matter more than the individual cells. Three bands stand out:
If you concentrate your calling in the green bands and avoid the red ones, you are getting roughly 2x the conversations for the same dialler minutes.
Why Monday morning is a trap
Monday 8am to 9am is the worst window in the week (in our data). The reasons:
Calling at 8:15am Monday into a B2B prospect is the equivalent of knocking on the door while they are in the shower. Technically allowed. Almost never useful.
Why Tuesday 10am is the gold zone
The first daily peak hits 10am Tuesday and holds through 11am Wednesday and Thursday. Decision-makers have:
The Tuesday-Wednesday-Thursday 10am to 11am window is statistically the best hour-band of the week. The 38% peak we saw on Tuesdays is a 2x improvement over the Monday 8am number. Same list, same script, twice the conversations.
The Friday afternoon collapse
By 3pm Friday the connect rate is dropping. By 4pm Friday it is at 21% (worse than any non-Monday morning window). By 5pm Friday it is 14% (worst hour of the week).
Decision-makers are checking out mentally. Many have stopped picking up unknown numbers entirely (already in weekend mode).
The exception: Friday 10am to 11am still hits 28 to 31%, which is fine. The collapse is specifically 3pm onwards.
What this means for your campaign
If you only have time for 100 calls a day, you should be making 75 of them between 10am and 11am, and 1pm to 3pm, Tuesday through Thursday. The other 25 can be opportunistic.
If you are running 1,000 calls a day on a dialler, you should pace the dialler to over-weight those windows. Most diallers run a flat schedule and waste 30 to 40% of their dial budget on low-conversion windows.
If you are running an AI voice agent, configure the campaign engine to call the optimal windows. We do this by default for Waboom outbound campaigns. The configuration takes 5 minutes. The conversion impact is significant.
The 2x compounds: you are not just getting more conversations, you are getting them at lower spam-likely risk (because the carrier sees you concentrated dialling in normal commercial hours, not blasting at random). We covered why dialler numbers burn in detail.
Caveats
The point is not the exact percentages. The point is the spread. A 2x difference exists between the best and worst windows. You can be calling at the right time or the wrong time. The dialler does not care, and the dashboard does not show it. Your CRM might if you ask it the right question.
Frequently asked questions
How do I check this for my own campaign?
Open your dialler's call log for the last 60 days. Pivot connect rate by hour-of-day and day-of-week. If you do not have hour-level granularity, group by morning vs afternoon vs Monday vs Friday. The pattern shows up at most sample sizes above 500 calls.
My team always does Monday morning blitzes. Should I stop?
Probably yes for B2B. The 8am to 9am Monday window is reliably the worst. Move the blitz to 10am Tuesday for a 2x conversion lift on the same effort.
Does this apply to inbound (caller-initiated) too?
No. Inbound has a completely different curve, dominated by when your prospects need help (which has more correlation with their day than yours). Inbound peaks after-hours for trades and healthcare. We covered the missed-call cost of after-hours inbound in the Dunedin property management story.
What about Saturday?
We did not run Saturday data in this study because most B2B campaigns shut down on weekends. Anecdotally Saturday morning 9am to 10am gets a 25 to 30% connect rate for B2B (decision-makers are clearing weekend inboxes). Most lists are not legally callable on weekends in NZ (Marketing Association rules) or AU (ACMA Industry Standard 2017 limits Sundays). We covered the legal side in the Australian telemarketing law guide.
Can the AI agent do this scheduling automatically?
Yes. The Waboom campaign engine can constrain dialling to specific hour-of-day windows per timezone, can over-weight high-conversion windows, and can spread the list across optimal slots so you do not concentrate too much dial volume in any single hour (which would itself trigger spam-likely scoring). We covered the platform layer in what makes Waboom different.
Have us audit your dialler timing
If you run more than 1,000 outbound calls a week, we can pull your last 60 days of data, build the connect-rate-by-hour heatmap, and give you the schedule that doubles your conversion on the same dial budget. No charge for the audit if you are evaluating Waboom.
Book a dialler audit · Voice agent calculator · Live pricing page · Try sample voices
Leonardo Garcia-Curtis
Founder & CEO at Waboom AI. Building voice AI agents that convert.
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