Do Outbound Results Improve Over Time? Month-by-Month Data

Outbound results improve fastest in the first three months, then the climb slows down. In four B2B campaigns we ran where the case study records every month, month 3 booked between 1.5 and 2.9 times as many sales calls as month 1. None of the four went backwards in that stretch.

After month 3 the picture changes. The calls kept coming, but the steep climb did not continue in every case.

A UK agency booked 68 calls in month 3, then averaged about 61 a month for the rest of the year. A Canadian financial advisory firm went from 32 in month 3 to about 38 a month afterwards. A US coaching firm jumped to 78 in month 4.

So outbound improves fast while you learn what works, then settles at a level your market, your list and your sending capacity allow. In both full-year cases, month 3 turned out to be a fair preview of that level. The numbers are below, along with a way to read your own.

What do real outbound campaigns look like month by month?

Smirnov Consulting Group is a Prague-based B2B outbound lead generation agency that runs cold email and LinkedIn campaigns for founder-led B2B companies and books qualified sales calls.

The five campaigns below come from our published case studies, with client names left out. Every number counts booked sales calls, not replies or "interested" leads.

A warm email here is an email follow-up sent after a LinkedIn first touch, so by the time it arrives, the prospect has met the sender once already.

The month 4 to 12 averages are my own arithmetic from the published totals. For the UK agency: 44 + 57 + 68 = 169 calls in the first quarter, 714 - 169 = 545 in the nine months after, 545 / 9 = about 61 a month.

The same math on the Canadian firm gives 421 - 77 = 344, or about 38 a month, and 204 - 126 = 78 gives the coaching firm's month 4.

What changes between month 1 and month 3?

Every campaign with a monthly split booked calls in month 1, between 17 and 44 of them. In every one, month 1 was also the weakest month of the first quarter. Month 2 grew by roughly 30% to 94% on month 1, and month 3 grew again on top of that.

That first month is where you find out who answers. The UK agency was working 3 niches in parallel. With several niches live at once, the first month is also when you see which of them reply at all.

The US marketing agency tested two offers against each other. It started slowest in the whole set, at 17 calls, and posted the biggest multiple by month 3.

Channel mix alone did not predict the curve. The fastest start ran LinkedIn plus cold email, the biggest multiple came from LinkedIn plus warm email, and the biggest year came from LinkedIn on its own.

In a 2022 LinkedIn post I put it like this: "there is nothing that can fix it in 1 day, it can take a couple of weeks to get the momentum going, but when you get that momentum - it never stops and compounds like crazy every month."

The first half of that line holds in every campaign with a monthly split. The "every month" part needs a footnote, and the numbers after month 3 are that footnote.

Do outbound results keep improving after month 3?

Sometimes, and much more slowly. Here is month 3 against what each campaign did next:

Before month 3, the smallest jump from month 1 in this data was 55%. After month 3, the biggest move was 22%. The steep part is over by then.

Within that, the three campaigns took different shapes.

The UK campaign's later months averaged under 68, so at least some of them came in below month 3. The Canadian firm averaged a little above its month 3. The coaching firm was still climbing when its case study stopped, so I cannot tell you where it flattened.

What the two full-year cases have in common matters more than the differences. In both, the average for months 4 to 12 landed within about 20% of month 3.

Two cases are not a law. They are still a better forecast than "compounding" with nothing behind it, which is the word a lot of advice on this question leans on.

The Australian agency shows the other side of the same point. It booked about 215 calls a month on average over its year, while the Canadian firm averaged about 35 over its year.

Both ran for twelve months, so time cannot explain a gap of roughly 6 times. Differences in market, offer and how many people each campaign could reach can.

The offer part is easy to underestimate. I have written about two companies in one niche, in one country, selling much the same service: one booked a call or two a month, the other a hundred or more.

The busy one had narrowed to a single thing and committed to it, which is the case I make for one offer and one audience.

Why does an outbound curve flatten, or even drop?

Time only improves results up to a ceiling, and three things set that ceiling.

The list is finite. A niche has a fixed number of decision-makers, and the ones most ready to talk tend to answer in the first few months.

Everyone after that is harder to move. If your market is narrow, work out your runway before you plan a straight line up; I laid out how to count it in this piece on a small or shrinking outbound market.

Capacity is fixed until you add to it. Each LinkedIn account and each inbox can only carry so much outreach safely. Once every account is at a safe pace, the curve rises again only if you add more accounts or open a new segment.

Reputation can wear down. For anyone sending to Gmail, Google sets the limit at 0.3% of your mail reported as spam in Postmaster Tools, and asks you to stay under 0.1% (Gmail's sender guidelines, checked September 2026).

Push the same tired list harder and more people mark you as spam, which is exactly what that number counts. That is how a strong first quarter turns into a weak second half of the year.

If your numbers already dropped after a good start, the cause is usually one of those three, or a market that too many senders have already worked.

How do I compare my own numbers with these?

Find the row that looks most like your month 1, then check where that campaign stood by month 3.

Then run three checks:

1. Did month 2 beat month 1? All four campaigns here grew by roughly 30% or more in month 2. A flat month 2 puts you outside everything in this data. Before adding volume, look at who is replying, who is ignoring you, and whether replies are answered the same day.
2. Is month 3 at least 1.5 times month 1? That was the lowest multiple in the set. At 1.5x or above, you are inside the range, and the real question becomes where the curve settles.
3. Is the absolute number big enough to read? Multiples on 2 or 3 calls a month mean very little. A move from 2 to 4 is "doubling" and still tells you almost nothing about month 9.

One more thing from the table: a slow start alone is not a warning sign. The 17-call start ended its first quarter at 49.

How long should I give outbound before judging it?

Do not judge it on month 1. In every campaign here with a monthly split, month 1 was the weakest month of the first quarter, so a verdict after 30 days is a verdict on the slowest stretch you will see early on.

By month 3 you can judge direction: did it grow, and by how much. After that you can start to judge the level, and in the two full-year cases month 3 was already within about 20% of it.

If you are testing an agency, the same logic says a 30-day trial mostly measures setup; I made that case in the piece on piloting an outbound agency.

Revenue runs on a different clock. Calls become contracts only as fast as your sales cycle allows, so the money trails the call curve by weeks or months. That lag, the quiet setup weeks before sending, and the work on the client's side are covered in how the first 90 days usually go.

Take your first three months and write them in a row. Divide month 3 by month 1. Then put that number next to 1.5 and 2.9, and you will know whether your first quarter sits inside the range these campaigns covered.